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 : os_free(token);
46 0 : }
47 :
48 :
49 77 : static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
50 : {
51 : struct wps_nfc_pw_token *token, *prev;
52 77 : 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 77 : }
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 : os_free(pin->pin);
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 68 : static void wps_free_pins(struct dl_list *pins)
107 : {
108 : struct wps_uuid_pin *pin, *prev;
109 69 : dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
110 1 : wps_remove_pin(pin);
111 68 : }
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 68 : static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
123 : {
124 : struct wps_pbc_session *prev;
125 :
126 143 : while (pbc) {
127 7 : prev = pbc;
128 7 : pbc = pbc->next;
129 7 : os_free(prev);
130 : }
131 68 : }
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 47 : static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
203 : const u8 *addr)
204 : {
205 : int i;
206 282 : wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
207 282 : MAC2STR(addr));
208 272 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
209 227 : 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 49 : return; /* already in list */
213 : }
214 225 : for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
215 180 : os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
216 : ETH_ALEN);
217 45 : os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
218 45 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
219 45 : (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
220 : }
221 :
222 :
223 41 : static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
224 : const u8 *addr)
225 : {
226 : int i;
227 246 : wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
228 246 : MAC2STR(addr));
229 46 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
230 45 : if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
231 40 : break;
232 : }
233 41 : if (i == WPS_MAX_AUTHORIZED_MACS) {
234 1 : wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
235 : "list");
236 42 : return; /* not in the list */
237 : }
238 200 : for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
239 160 : os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
240 : ETH_ALEN);
241 40 : os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
242 : ETH_ALEN);
243 40 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
244 40 : (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
245 : }
246 :
247 :
248 68 : static void wps_free_devices(struct wps_registrar_device *dev)
249 : {
250 : struct wps_registrar_device *prev;
251 :
252 195 : while (dev) {
253 59 : prev = dev;
254 59 : dev = dev->next;
255 59 : wps_device_data_free(&prev->dev);
256 59 : os_free(prev);
257 : }
258 68 : }
259 :
260 :
261 64 : 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 88 : 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 59 : return NULL;
271 : }
272 :
273 :
274 61 : static void wps_device_clone_data(struct wps_device_data *dst,
275 : struct wps_device_data *src)
276 : {
277 61 : os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
278 61 : 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 61 : WPS_STRDUP(device_name);
285 61 : WPS_STRDUP(manufacturer);
286 61 : WPS_STRDUP(model_name);
287 61 : WPS_STRDUP(model_number);
288 61 : WPS_STRDUP(serial_number);
289 : #undef WPS_STRDUP
290 61 : }
291 :
292 :
293 61 : 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 61 : d = wps_device_get(reg, dev->mac_addr);
299 61 : if (d == NULL) {
300 59 : d = os_zalloc(sizeof(*d));
301 59 : if (d == NULL)
302 0 : return -1;
303 59 : d->next = reg->devices;
304 59 : reg->devices = d;
305 : }
306 :
307 61 : wps_device_clone_data(&d->dev, dev);
308 61 : os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
309 :
310 61 : return 0;
311 : }
312 :
313 :
314 90 : static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
315 : const u8 *addr, const u8 *uuid_e)
316 : {
317 90 : struct wps_pbc_session *pbc, *prev = NULL;
318 : struct os_reltime now;
319 :
320 90 : os_get_reltime(&now);
321 :
322 90 : pbc = reg->pbc_sessions;
323 181 : while (pbc) {
324 133 : if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
325 66 : os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
326 66 : if (prev)
327 0 : prev->next = pbc->next;
328 : else
329 66 : reg->pbc_sessions = pbc->next;
330 66 : break;
331 : }
332 1 : prev = pbc;
333 1 : pbc = pbc->next;
334 : }
335 :
336 90 : if (!pbc) {
337 24 : pbc = os_zalloc(sizeof(*pbc));
338 24 : if (pbc == NULL)
339 90 : return;
340 24 : os_memcpy(pbc->addr, addr, ETH_ALEN);
341 24 : if (uuid_e)
342 24 : os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
343 : }
344 :
345 90 : pbc->next = reg->pbc_sessions;
346 90 : reg->pbc_sessions = pbc;
347 90 : pbc->timestamp = now;
348 :
349 : /* remove entries that have timed out */
350 90 : prev = pbc;
351 90 : pbc = pbc->next;
352 :
353 181 : 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 17 : static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
367 : const u8 *uuid_e,
368 : const u8 *p2p_dev_addr)
369 : {
370 17 : struct wps_pbc_session *pbc, *prev = NULL, *tmp;
371 :
372 17 : pbc = reg->pbc_sessions;
373 51 : while (pbc) {
374 17 : 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 17 : if (prev)
379 0 : prev->next = pbc->next;
380 : else
381 17 : reg->pbc_sessions = pbc->next;
382 17 : tmp = pbc;
383 17 : pbc = pbc->next;
384 102 : wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
385 102 : "addr=" MACSTR, MAC2STR(tmp->addr));
386 17 : wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
387 17 : tmp->uuid_e, WPS_UUID_LEN);
388 17 : os_free(tmp);
389 17 : continue;
390 : }
391 0 : prev = pbc;
392 0 : pbc = pbc->next;
393 : }
394 17 : }
395 :
396 :
397 115 : int wps_registrar_pbc_overlap(struct wps_registrar *reg,
398 : const u8 *addr, const u8 *uuid_e)
399 : {
400 115 : int count = 0;
401 : struct wps_pbc_session *pbc;
402 115 : struct wps_pbc_session *first = NULL;
403 : struct os_reltime now;
404 :
405 115 : os_get_reltime(&now);
406 :
407 115 : wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
408 :
409 115 : if (uuid_e) {
410 90 : wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
411 90 : wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
412 : uuid_e, WPS_UUID_LEN);
413 90 : count++;
414 : }
415 :
416 208 : for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
417 558 : wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
418 558 : MAC2STR(pbc->addr));
419 93 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
420 93 : pbc->uuid_e, WPS_UUID_LEN);
421 93 : 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 95 : 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 : }
431 184 : if (uuid_e == NULL ||
432 91 : os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
433 3 : wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
434 3 : count++;
435 : }
436 93 : if (first == NULL)
437 91 : first = pbc;
438 : }
439 :
440 115 : wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
441 :
442 115 : return count > 1 ? 1 : 0;
443 : }
444 :
445 :
446 456 : static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
447 : {
448 456 : wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
449 456 : wps->wps_state);
450 456 : wpabuf_put_be16(msg, ATTR_WPS_STATE);
451 456 : wpabuf_put_be16(msg, 1);
452 456 : wpabuf_put_u8(msg, wps->wps_state);
453 456 : 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 :
482 456 : static int wps_build_ap_setup_locked(struct wps_context *wps,
483 : struct wpabuf *msg)
484 : {
485 456 : 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 : }
491 456 : return 0;
492 : }
493 :
494 :
495 456 : static int wps_build_selected_registrar(struct wps_registrar *reg,
496 : struct wpabuf *msg)
497 : {
498 456 : if (!reg->sel_reg_union)
499 312 : return 0;
500 144 : wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
501 144 : wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
502 144 : wpabuf_put_be16(msg, 1);
503 144 : wpabuf_put_u8(msg, 1);
504 144 : return 0;
505 : }
506 :
507 :
508 456 : static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
509 : struct wpabuf *msg)
510 : {
511 456 : u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
512 456 : if (!reg->sel_reg_union)
513 312 : return 0;
514 144 : if (reg->sel_reg_dev_password_id_override >= 0)
515 90 : id = reg->sel_reg_dev_password_id_override;
516 144 : wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
517 144 : wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
518 144 : wpabuf_put_be16(msg, 2);
519 144 : wpabuf_put_be16(msg, id);
520 144 : return 0;
521 : }
522 :
523 :
524 228 : static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
525 : struct wpabuf *msg)
526 : {
527 228 : u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
528 228 : if (!reg->sel_reg_union)
529 156 : return 0;
530 72 : if (reg->sel_reg_dev_password_id_override >= 0)
531 45 : id = reg->sel_reg_dev_password_id_override;
532 72 : if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
533 70 : return 0;
534 2 : return wps_build_uuid_e(msg, reg->wps->uuid);
535 : }
536 :
537 :
538 72 : static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
539 : {
540 72 : *methods |= WPS_CONFIG_PUSHBUTTON;
541 72 : if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
542 : WPS_CONFIG_VIRT_PUSHBUTTON)
543 0 : *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
544 72 : if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
545 : WPS_CONFIG_PHY_PUSHBUTTON)
546 0 : *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
547 72 : if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
548 72 : WPS_CONFIG_VIRT_PUSHBUTTON &&
549 72 : (*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 72 : *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
557 : }
558 72 : }
559 :
560 :
561 456 : static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
562 : struct wpabuf *msg)
563 : {
564 : u16 methods;
565 456 : if (!reg->sel_reg_union)
566 312 : return 0;
567 144 : methods = reg->wps->config_methods;
568 144 : methods &= ~WPS_CONFIG_PUSHBUTTON;
569 144 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
570 : WPS_CONFIG_PHY_PUSHBUTTON);
571 144 : if (reg->pbc)
572 48 : wps_set_pushbutton(&methods, reg->wps->config_methods);
573 144 : if (reg->sel_reg_config_methods_override >= 0)
574 144 : methods = reg->sel_reg_config_methods_override;
575 144 : wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
576 : methods);
577 144 : wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
578 144 : wpabuf_put_be16(msg, 2);
579 144 : wpabuf_put_be16(msg, methods);
580 144 : return 0;
581 : }
582 :
583 :
584 228 : 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 : */
592 228 : methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
593 228 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
594 : WPS_CONFIG_PHY_PUSHBUTTON);
595 228 : wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
596 228 : wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
597 228 : wpabuf_put_be16(msg, 2);
598 228 : wpabuf_put_be16(msg, methods);
599 228 : return 0;
600 : }
601 :
602 :
603 50 : static int wps_build_config_methods_r(struct wps_registrar *reg,
604 : struct wpabuf *msg)
605 : {
606 50 : return wps_build_config_methods(msg, reg->wps->config_methods);
607 : }
608 :
609 :
610 228 : const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
611 : {
612 228 : *count = 0;
613 :
614 524 : while (*count < WPS_MAX_AUTHORIZED_MACS) {
615 296 : if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
616 228 : break;
617 68 : (*count)++;
618 : }
619 :
620 228 : 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 68 : wps_registrar_init(struct wps_context *wps,
638 : const struct wps_registrar_config *cfg)
639 : {
640 68 : struct wps_registrar *reg = os_zalloc(sizeof(*reg));
641 68 : if (reg == NULL)
642 0 : return NULL;
643 :
644 68 : dl_list_init(®->pins);
645 68 : dl_list_init(®->nfc_pw_tokens);
646 68 : reg->wps = wps;
647 68 : reg->new_psk_cb = cfg->new_psk_cb;
648 68 : reg->set_ie_cb = cfg->set_ie_cb;
649 68 : reg->pin_needed_cb = cfg->pin_needed_cb;
650 68 : reg->reg_success_cb = cfg->reg_success_cb;
651 68 : reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
652 68 : reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
653 68 : reg->cb_ctx = cfg->cb_ctx;
654 68 : reg->skip_cred_build = cfg->skip_cred_build;
655 68 : if (cfg->extra_cred) {
656 1 : reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
657 : cfg->extra_cred_len);
658 1 : if (reg->extra_cred == NULL) {
659 0 : os_free(reg);
660 0 : return NULL;
661 : }
662 : }
663 68 : reg->disable_auto_conf = cfg->disable_auto_conf;
664 68 : reg->sel_reg_dev_password_id_override = -1;
665 68 : reg->sel_reg_config_methods_override = -1;
666 68 : reg->static_wep_only = cfg->static_wep_only;
667 68 : reg->dualband = cfg->dualband;
668 68 : reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
669 :
670 68 : if (wps_set_ie(reg)) {
671 0 : wps_registrar_deinit(reg);
672 0 : return NULL;
673 : }
674 :
675 68 : return reg;
676 : }
677 :
678 :
679 : /**
680 : * wps_registrar_deinit - Deinitialize WPS Registrar data
681 : * @reg: Registrar data from wps_registrar_init()
682 : */
683 68 : void wps_registrar_deinit(struct wps_registrar *reg)
684 : {
685 68 : if (reg == NULL)
686 68 : return;
687 68 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
688 68 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
689 68 : wps_free_pins(®->pins);
690 68 : wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0);
691 68 : wps_free_pbc_sessions(reg->pbc_sessions);
692 68 : wpabuf_free(reg->extra_cred);
693 68 : wps_free_devices(reg->devices);
694 68 : 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(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 29 : int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
850 : {
851 : struct wps_uuid_pin *pin, *prev;
852 :
853 30 : dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
854 : {
855 11 : 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 19 : 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 77 : int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
927 : {
928 : struct wps_uuid_pin *pin;
929 :
930 80 : dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
931 13 : 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 67 : return -1;
943 : }
944 :
945 :
946 19 : static void wps_registrar_stop_pbc(struct wps_registrar *reg)
947 : {
948 19 : reg->selected_registrar = 0;
949 19 : reg->pbc = 0;
950 19 : os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
951 19 : wps_registrar_remove_authorized_mac(reg,
952 : (u8 *) "\xff\xff\xff\xff\xff\xff");
953 19 : wps_registrar_selected_registrar_changed(reg, 0);
954 19 : }
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 25 : int wps_registrar_button_pushed(struct wps_registrar *reg,
982 : const u8 *p2p_dev_addr)
983 : {
984 50 : if (p2p_dev_addr == NULL &&
985 25 : 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 24 : wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
992 24 : reg->force_pbc_overlap = 0;
993 24 : reg->selected_registrar = 1;
994 24 : reg->pbc = 1;
995 24 : if (p2p_dev_addr)
996 0 : os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
997 : else
998 24 : os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
999 24 : wps_registrar_add_authorized_mac(reg,
1000 : (u8 *) "\xff\xff\xff\xff\xff\xff");
1001 24 : wps_registrar_selected_registrar_changed(reg, 0);
1002 :
1003 24 : wps_pbc_active_event(reg->wps);
1004 24 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1005 24 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1006 24 : eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1007 : reg, NULL);
1008 24 : return 0;
1009 : }
1010 :
1011 :
1012 17 : static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1013 : {
1014 17 : wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1015 17 : eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1016 17 : wps_registrar_stop_pbc(reg);
1017 17 : wps_pbc_disable_event(reg->wps);
1018 17 : }
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 199 : 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 199 : int skip_add = 0;
1088 :
1089 199 : wpa_hexdump_buf(MSG_MSGDUMP,
1090 : "WPS: Probe Request with WPS data received",
1091 : wps_data);
1092 :
1093 199 : if (wps_parse_msg(wps_data, &attr) < 0)
1094 126 : return;
1095 :
1096 199 : 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 199 : 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 398 : if (reg->enrollee_seen_cb && attr.uuid_e &&
1109 398 : attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1110 199 : char *dev_name = NULL;
1111 199 : if (attr.dev_name) {
1112 199 : dev_name = os_zalloc(attr.dev_name_len + 1);
1113 199 : if (dev_name) {
1114 199 : os_memcpy(dev_name, attr.dev_name,
1115 : attr.dev_name_len);
1116 : }
1117 : }
1118 796 : reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1119 : attr.primary_dev_type,
1120 199 : WPA_GET_BE16(attr.config_methods),
1121 199 : WPA_GET_BE16(attr.dev_password_id),
1122 199 : *attr.request_type, dev_name);
1123 199 : os_free(dev_name);
1124 : }
1125 :
1126 199 : if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1127 126 : return; /* Not PBC */
1128 :
1129 438 : wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1130 438 : MACSTR, MAC2STR(addr));
1131 73 : 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 73 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1137 : WPS_UUID_LEN);
1138 :
1139 : #ifdef WPS_WORKAROUNDS
1140 75 : 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 73 : if (!skip_add)
1156 73 : wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1157 73 : 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 32 : 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 32 : if (reg->reg_success_cb == NULL)
1191 32 : return;
1192 :
1193 32 : reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1194 : }
1195 :
1196 :
1197 228 : static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1198 : struct wpabuf *probe_resp_ie)
1199 : {
1200 228 : return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1201 : }
1202 :
1203 :
1204 135 : static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1205 : {
1206 135 : u16 methods = 0;
1207 135 : if (reg->set_sel_reg_cb == NULL)
1208 270 : 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 228 : 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 228 : size_t vendor_len = 0;
1236 : int i;
1237 :
1238 228 : if (reg->set_ie_cb == NULL)
1239 0 : return 0;
1240 :
1241 2508 : for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1242 2280 : 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 228 : beacon = wpabuf_alloc(400 + vendor_len);
1249 228 : if (beacon == NULL)
1250 0 : return -1;
1251 228 : probe = wpabuf_alloc(500 + vendor_len);
1252 228 : if (probe == NULL) {
1253 0 : wpabuf_free(beacon);
1254 0 : return -1;
1255 : }
1256 :
1257 228 : auth_macs = wps_authorized_macs(reg, &count);
1258 :
1259 228 : wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1260 :
1261 456 : if (wps_build_version(beacon) ||
1262 456 : wps_build_wps_state(reg->wps, beacon) ||
1263 456 : wps_build_ap_setup_locked(reg->wps, beacon) ||
1264 456 : wps_build_selected_registrar(reg, beacon) ||
1265 456 : wps_build_sel_reg_dev_password_id(reg, beacon) ||
1266 456 : wps_build_sel_reg_config_methods(reg, beacon) ||
1267 456 : wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1268 467 : (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) ||
1269 456 : wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1270 228 : 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 228 : wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1286 :
1287 456 : if (wps_build_version(probe) ||
1288 456 : wps_build_wps_state(reg->wps, probe) ||
1289 456 : wps_build_ap_setup_locked(reg->wps, probe) ||
1290 456 : wps_build_selected_registrar(reg, probe) ||
1291 456 : wps_build_sel_reg_dev_password_id(reg, probe) ||
1292 456 : wps_build_sel_reg_config_methods(reg, probe) ||
1293 228 : wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1294 228 : WPS_RESP_REGISTRAR) ||
1295 456 : wps_build_uuid_e(probe, reg->wps->uuid) ||
1296 456 : wps_build_device_attrs(®->wps->dev, probe) ||
1297 456 : wps_build_probe_config_methods(reg, probe) ||
1298 467 : (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) ||
1299 456 : wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1300 228 : wps_build_vendor_ext(®->wps->dev, probe)) {
1301 0 : wpabuf_free(beacon);
1302 0 : wpabuf_free(probe);
1303 0 : return -1;
1304 : }
1305 :
1306 228 : beacon = wps_ie_encapsulate(beacon);
1307 228 : probe = wps_ie_encapsulate(probe);
1308 :
1309 228 : if (!beacon || !probe) {
1310 0 : wpabuf_free(beacon);
1311 0 : wpabuf_free(probe);
1312 0 : return -1;
1313 : }
1314 :
1315 228 : 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 228 : return wps_cb_set_ie(reg, beacon, probe);
1338 : }
1339 :
1340 :
1341 46 : static int wps_get_dev_password(struct wps_data *wps)
1342 : {
1343 : const u8 *pin;
1344 46 : size_t pin_len = 0;
1345 :
1346 46 : os_free(wps->dev_password);
1347 46 : wps->dev_password = NULL;
1348 :
1349 46 : if (wps->pbc) {
1350 17 : wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1351 17 : pin = (const u8 *) "00000000";
1352 17 : 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 40 : 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 30 : wps->dev_password = os_malloc(pin_len);
1395 30 : if (wps->dev_password == NULL)
1396 0 : return -1;
1397 30 : os_memcpy(wps->dev_password, pin, pin_len);
1398 30 : wps->dev_password_len = pin_len;
1399 :
1400 30 : return 0;
1401 : }
1402 :
1403 :
1404 50 : static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1405 : {
1406 50 : wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1407 50 : wpabuf_put_be16(msg, ATTR_UUID_R);
1408 50 : wpabuf_put_be16(msg, WPS_UUID_LEN);
1409 50 : wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1410 50 : return 0;
1411 : }
1412 :
1413 :
1414 30 : 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 30 : if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1421 0 : return -1;
1422 30 : wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1423 30 : wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1424 30 : wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1425 :
1426 30 : 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 30 : wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1433 30 : wpabuf_put_be16(msg, ATTR_R_HASH1);
1434 30 : wpabuf_put_be16(msg, SHA256_MAC_LEN);
1435 30 : hash = wpabuf_put(msg, SHA256_MAC_LEN);
1436 : /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1437 30 : addr[0] = wps->snonce;
1438 30 : len[0] = WPS_SECRET_NONCE_LEN;
1439 30 : addr[1] = wps->psk1;
1440 30 : len[1] = WPS_PSK_LEN;
1441 30 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
1442 30 : len[2] = wpabuf_len(wps->dh_pubkey_e);
1443 30 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
1444 30 : len[3] = wpabuf_len(wps->dh_pubkey_r);
1445 30 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1446 30 : wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1447 :
1448 30 : wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1449 30 : wpabuf_put_be16(msg, ATTR_R_HASH2);
1450 30 : wpabuf_put_be16(msg, SHA256_MAC_LEN);
1451 30 : hash = wpabuf_put(msg, SHA256_MAC_LEN);
1452 : /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1453 30 : addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1454 30 : addr[1] = wps->psk2;
1455 30 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1456 30 : wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1457 :
1458 30 : return 0;
1459 : }
1460 :
1461 :
1462 30 : static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1463 : {
1464 30 : wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1465 30 : wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1466 30 : wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1467 30 : wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1468 30 : return 0;
1469 : }
1470 :
1471 :
1472 29 : static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1473 : {
1474 29 : wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1475 29 : wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1476 29 : wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1477 29 : wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1478 : WPS_SECRET_NONCE_LEN);
1479 29 : return 0;
1480 : }
1481 :
1482 :
1483 35 : static int wps_build_cred_network_idx(struct wpabuf *msg,
1484 : const struct wps_credential *cred)
1485 : {
1486 35 : wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1487 35 : wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1488 35 : wpabuf_put_be16(msg, 1);
1489 35 : wpabuf_put_u8(msg, 1);
1490 35 : return 0;
1491 : }
1492 :
1493 :
1494 35 : static int wps_build_cred_ssid(struct wpabuf *msg,
1495 : const struct wps_credential *cred)
1496 : {
1497 35 : wpa_printf(MSG_DEBUG, "WPS: * SSID");
1498 70 : wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1499 35 : cred->ssid, cred->ssid_len);
1500 35 : wpabuf_put_be16(msg, ATTR_SSID);
1501 35 : wpabuf_put_be16(msg, cred->ssid_len);
1502 35 : wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1503 35 : return 0;
1504 : }
1505 :
1506 :
1507 35 : static int wps_build_cred_auth_type(struct wpabuf *msg,
1508 : const struct wps_credential *cred)
1509 : {
1510 35 : wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1511 35 : cred->auth_type);
1512 35 : wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1513 35 : wpabuf_put_be16(msg, 2);
1514 35 : wpabuf_put_be16(msg, cred->auth_type);
1515 35 : return 0;
1516 : }
1517 :
1518 :
1519 35 : static int wps_build_cred_encr_type(struct wpabuf *msg,
1520 : const struct wps_credential *cred)
1521 : {
1522 35 : wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1523 35 : cred->encr_type);
1524 35 : wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1525 35 : wpabuf_put_be16(msg, 2);
1526 35 : wpabuf_put_be16(msg, cred->encr_type);
1527 35 : return 0;
1528 : }
1529 :
1530 :
1531 35 : static int wps_build_cred_network_key(struct wpabuf *msg,
1532 : const struct wps_credential *cred)
1533 : {
1534 35 : wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1535 35 : (int) cred->key_len);
1536 70 : wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1537 35 : cred->key, cred->key_len);
1538 35 : wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1539 35 : wpabuf_put_be16(msg, cred->key_len);
1540 35 : wpabuf_put_data(msg, cred->key, cred->key_len);
1541 35 : return 0;
1542 : }
1543 :
1544 :
1545 35 : static int wps_build_credential(struct wpabuf *msg,
1546 : const struct wps_credential *cred)
1547 : {
1548 70 : if (wps_build_cred_network_idx(msg, cred) ||
1549 70 : wps_build_cred_ssid(msg, cred) ||
1550 70 : wps_build_cred_auth_type(msg, cred) ||
1551 70 : wps_build_cred_encr_type(msg, cred) ||
1552 70 : wps_build_cred_network_key(msg, cred) ||
1553 35 : wps_build_mac_addr(msg, cred->mac_addr))
1554 0 : return -1;
1555 35 : 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 36 : int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1579 : {
1580 : struct wpabuf *cred;
1581 :
1582 36 : if (wps->wps->registrar->skip_cred_build)
1583 1 : goto skip_cred_build;
1584 :
1585 35 : wpa_printf(MSG_DEBUG, "WPS: * Credential");
1586 35 : if (wps->use_cred) {
1587 0 : os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1588 0 : goto use_provided;
1589 : }
1590 35 : os_memset(&wps->cred, 0, sizeof(wps->cred));
1591 :
1592 35 : os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1593 35 : wps->cred.ssid_len = wps->wps->ssid_len;
1594 :
1595 : /* Select the best authentication and encryption type */
1596 35 : if (wps->auth_type & WPS_AUTH_WPA2PSK)
1597 35 : 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 35 : wps->cred.auth_type = wps->auth_type;
1608 :
1609 35 : if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1610 0 : wps->auth_type == WPS_AUTH_WPAPSK) {
1611 70 : if (wps->encr_type & WPS_ENCR_AES)
1612 35 : 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 35 : wps->cred.encr_type = wps->encr_type;
1634 : /*
1635 : * Set MAC address in the Credential to be the Enrollee's MAC address
1636 : */
1637 35 : os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1638 :
1639 42 : 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_get_bytes(r, sizeof(r)) < 0)
1644 0 : return -1;
1645 7 : os_free(wps->new_psk);
1646 7 : wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1647 7 : if (wps->new_psk == NULL)
1648 0 : return -1;
1649 7 : wps->new_psk_len--; /* remove newline */
1650 49 : while (wps->new_psk_len &&
1651 21 : wps->new_psk[wps->new_psk_len - 1] == '=')
1652 14 : wps->new_psk_len--;
1653 14 : wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1654 7 : wps->new_psk, wps->new_psk_len);
1655 7 : os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1656 7 : wps->cred.key_len = wps->new_psk_len;
1657 56 : } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1658 28 : wps->use_psk_key && wps->wps->psk_set) {
1659 : char hex[65];
1660 0 : wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1661 0 : wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1662 0 : os_memcpy(wps->cred.key, hex, 32 * 2);
1663 0 : wps->cred.key_len = 32 * 2;
1664 56 : } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1665 28 : wps->wps->network_key) {
1666 24 : os_memcpy(wps->cred.key, wps->wps->network_key,
1667 : wps->wps->network_key_len);
1668 24 : wps->cred.key_len = wps->wps->network_key_len;
1669 4 : } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1670 : char hex[65];
1671 : /* Generate a random per-device PSK */
1672 4 : os_free(wps->new_psk);
1673 4 : wps->new_psk_len = 32;
1674 4 : wps->new_psk = os_malloc(wps->new_psk_len);
1675 4 : if (wps->new_psk == NULL)
1676 0 : return -1;
1677 4 : if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1678 0 : os_free(wps->new_psk);
1679 0 : wps->new_psk = NULL;
1680 0 : return -1;
1681 : }
1682 8 : wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1683 4 : wps->new_psk, wps->new_psk_len);
1684 4 : wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1685 : wps->new_psk_len);
1686 4 : os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1687 4 : wps->cred.key_len = wps->new_psk_len * 2;
1688 : }
1689 :
1690 : use_provided:
1691 : #ifdef CONFIG_WPS_TESTING
1692 35 : if (wps_testing_dummy_cred)
1693 0 : cred = wpabuf_alloc(200);
1694 : else
1695 35 : cred = NULL;
1696 35 : if (cred) {
1697 : struct wps_credential dummy;
1698 0 : wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1699 0 : os_memset(&dummy, 0, sizeof(dummy));
1700 0 : os_memcpy(dummy.ssid, "dummy", 5);
1701 0 : dummy.ssid_len = 5;
1702 0 : dummy.auth_type = WPS_AUTH_WPA2PSK;
1703 0 : dummy.encr_type = WPS_ENCR_AES;
1704 0 : os_memcpy(dummy.key, "dummy psk", 9);
1705 0 : dummy.key_len = 9;
1706 0 : os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1707 0 : wps_build_credential(cred, &dummy);
1708 0 : wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1709 :
1710 0 : wpabuf_put_be16(msg, ATTR_CRED);
1711 0 : wpabuf_put_be16(msg, wpabuf_len(cred));
1712 0 : wpabuf_put_buf(msg, cred);
1713 :
1714 0 : wpabuf_free(cred);
1715 : }
1716 : #endif /* CONFIG_WPS_TESTING */
1717 :
1718 35 : cred = wpabuf_alloc(200);
1719 35 : if (cred == NULL)
1720 0 : return -1;
1721 :
1722 35 : if (wps_build_credential(cred, &wps->cred)) {
1723 0 : wpabuf_free(cred);
1724 0 : return -1;
1725 : }
1726 :
1727 35 : wpabuf_put_be16(msg, ATTR_CRED);
1728 35 : wpabuf_put_be16(msg, wpabuf_len(cred));
1729 35 : wpabuf_put_buf(msg, cred);
1730 35 : wpabuf_free(cred);
1731 :
1732 : skip_cred_build:
1733 36 : if (wps->wps->registrar->extra_cred) {
1734 1 : wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1735 1 : wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1736 : }
1737 :
1738 36 : return 0;
1739 : }
1740 :
1741 :
1742 0 : static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1743 : {
1744 0 : wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1745 :
1746 0 : if (wps_build_credential(msg, &wps->cred))
1747 0 : return -1;
1748 :
1749 0 : return 0;
1750 : }
1751 :
1752 :
1753 0 : static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1754 : {
1755 : struct wpabuf *msg, *plain;
1756 :
1757 0 : msg = wpabuf_alloc(1000);
1758 0 : if (msg == NULL)
1759 0 : return NULL;
1760 :
1761 0 : plain = wpabuf_alloc(200);
1762 0 : if (plain == NULL) {
1763 0 : wpabuf_free(msg);
1764 0 : return NULL;
1765 : }
1766 :
1767 0 : if (wps_build_ap_settings(wps, plain)) {
1768 0 : wpabuf_free(plain);
1769 0 : wpabuf_free(msg);
1770 0 : return NULL;
1771 : }
1772 :
1773 0 : wpabuf_put_be16(msg, ATTR_CRED);
1774 0 : wpabuf_put_be16(msg, wpabuf_len(plain));
1775 0 : wpabuf_put_buf(msg, plain);
1776 0 : wpabuf_free(plain);
1777 :
1778 0 : return msg;
1779 : }
1780 :
1781 :
1782 36 : static struct wpabuf * wps_build_m2(struct wps_data *wps)
1783 : {
1784 : struct wpabuf *msg;
1785 36 : int config_in_m2 = 0;
1786 :
1787 36 : if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1788 0 : return NULL;
1789 36 : wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1790 36 : wps->nonce_r, WPS_NONCE_LEN);
1791 36 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1792 :
1793 36 : wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1794 36 : msg = wpabuf_alloc(1000);
1795 36 : if (msg == NULL)
1796 0 : return NULL;
1797 :
1798 72 : if (wps_build_version(msg) ||
1799 72 : wps_build_msg_type(msg, WPS_M2) ||
1800 72 : wps_build_enrollee_nonce(wps, msg) ||
1801 72 : wps_build_registrar_nonce(wps, msg) ||
1802 72 : wps_build_uuid_r(wps, msg) ||
1803 72 : wps_build_public_key(wps, msg) ||
1804 72 : wps_derive_keys(wps) ||
1805 72 : wps_build_auth_type_flags(wps, msg) ||
1806 72 : wps_build_encr_type_flags(wps, msg) ||
1807 72 : wps_build_conn_type_flags(wps, msg) ||
1808 72 : wps_build_config_methods_r(wps->wps->registrar, msg) ||
1809 72 : wps_build_device_attrs(&wps->wps->dev, msg) ||
1810 36 : wps_build_rf_bands(&wps->wps->dev, msg,
1811 72 : wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1812 72 : wps_build_assoc_state(wps, msg) ||
1813 72 : wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1814 72 : wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1815 72 : wps_build_os_version(&wps->wps->dev, msg) ||
1816 36 : wps_build_wfa_ext(msg, 0, NULL, 0)) {
1817 0 : wpabuf_free(msg);
1818 0 : return NULL;
1819 : }
1820 :
1821 : #ifdef CONFIG_WPS_NFC
1822 42 : if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1823 6 : wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1824 : /*
1825 : * Use abbreviated handshake since public key hash allowed
1826 : * Enrollee to validate our public key similarly to how Enrollee
1827 : * public key was validated. There is no need to validate Device
1828 : * Password in this case.
1829 : */
1830 6 : struct wpabuf *plain = wpabuf_alloc(500);
1831 12 : if (plain == NULL ||
1832 12 : wps_build_cred(wps, plain) ||
1833 12 : wps_build_key_wrap_auth(wps, plain) ||
1834 6 : wps_build_encr_settings(wps, msg, plain)) {
1835 0 : wpabuf_free(msg);
1836 0 : wpabuf_free(plain);
1837 0 : return NULL;
1838 : }
1839 6 : wpabuf_free(plain);
1840 6 : config_in_m2 = 1;
1841 : }
1842 : #endif /* CONFIG_WPS_NFC */
1843 :
1844 36 : if (wps_build_authenticator(wps, msg)) {
1845 0 : wpabuf_free(msg);
1846 0 : return NULL;
1847 : }
1848 :
1849 36 : wps->int_reg = 1;
1850 36 : wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1851 36 : return msg;
1852 : }
1853 :
1854 :
1855 14 : static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1856 : {
1857 : struct wpabuf *msg;
1858 14 : u16 err = wps->config_error;
1859 :
1860 14 : wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1861 14 : msg = wpabuf_alloc(1000);
1862 14 : if (msg == NULL)
1863 0 : return NULL;
1864 :
1865 14 : if (wps->wps->ap && wps->wps->ap_setup_locked &&
1866 : err == WPS_CFG_NO_ERROR)
1867 0 : err = WPS_CFG_SETUP_LOCKED;
1868 :
1869 28 : if (wps_build_version(msg) ||
1870 28 : wps_build_msg_type(msg, WPS_M2D) ||
1871 28 : wps_build_enrollee_nonce(wps, msg) ||
1872 28 : wps_build_registrar_nonce(wps, msg) ||
1873 28 : wps_build_uuid_r(wps, msg) ||
1874 28 : wps_build_auth_type_flags(wps, msg) ||
1875 28 : wps_build_encr_type_flags(wps, msg) ||
1876 28 : wps_build_conn_type_flags(wps, msg) ||
1877 28 : wps_build_config_methods_r(wps->wps->registrar, msg) ||
1878 28 : wps_build_device_attrs(&wps->wps->dev, msg) ||
1879 14 : wps_build_rf_bands(&wps->wps->dev, msg,
1880 28 : wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1881 28 : wps_build_assoc_state(wps, msg) ||
1882 28 : wps_build_config_error(msg, err) ||
1883 28 : wps_build_os_version(&wps->wps->dev, msg) ||
1884 14 : wps_build_wfa_ext(msg, 0, NULL, 0)) {
1885 0 : wpabuf_free(msg);
1886 0 : return NULL;
1887 : }
1888 :
1889 14 : wps->state = RECV_M2D_ACK;
1890 14 : return msg;
1891 : }
1892 :
1893 :
1894 30 : static struct wpabuf * wps_build_m4(struct wps_data *wps)
1895 : {
1896 : struct wpabuf *msg, *plain;
1897 :
1898 30 : wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1899 :
1900 30 : wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1901 :
1902 30 : plain = wpabuf_alloc(200);
1903 30 : if (plain == NULL)
1904 0 : return NULL;
1905 :
1906 30 : msg = wpabuf_alloc(1000);
1907 30 : if (msg == NULL) {
1908 0 : wpabuf_free(plain);
1909 0 : return NULL;
1910 : }
1911 :
1912 60 : if (wps_build_version(msg) ||
1913 60 : wps_build_msg_type(msg, WPS_M4) ||
1914 60 : wps_build_enrollee_nonce(wps, msg) ||
1915 60 : wps_build_r_hash(wps, msg) ||
1916 60 : wps_build_r_snonce1(wps, plain) ||
1917 60 : wps_build_key_wrap_auth(wps, plain) ||
1918 60 : wps_build_encr_settings(wps, msg, plain) ||
1919 60 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1920 30 : wps_build_authenticator(wps, msg)) {
1921 0 : wpabuf_free(plain);
1922 0 : wpabuf_free(msg);
1923 0 : return NULL;
1924 : }
1925 30 : wpabuf_free(plain);
1926 :
1927 30 : wps->state = RECV_M5;
1928 30 : return msg;
1929 : }
1930 :
1931 :
1932 29 : static struct wpabuf * wps_build_m6(struct wps_data *wps)
1933 : {
1934 : struct wpabuf *msg, *plain;
1935 :
1936 29 : wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1937 :
1938 29 : plain = wpabuf_alloc(200);
1939 29 : if (plain == NULL)
1940 0 : return NULL;
1941 :
1942 29 : msg = wpabuf_alloc(1000);
1943 29 : if (msg == NULL) {
1944 0 : wpabuf_free(plain);
1945 0 : return NULL;
1946 : }
1947 :
1948 58 : if (wps_build_version(msg) ||
1949 58 : wps_build_msg_type(msg, WPS_M6) ||
1950 58 : wps_build_enrollee_nonce(wps, msg) ||
1951 58 : wps_build_r_snonce2(wps, plain) ||
1952 58 : wps_build_key_wrap_auth(wps, plain) ||
1953 58 : wps_build_encr_settings(wps, msg, plain) ||
1954 58 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1955 29 : wps_build_authenticator(wps, msg)) {
1956 0 : wpabuf_free(plain);
1957 0 : wpabuf_free(msg);
1958 0 : return NULL;
1959 : }
1960 29 : wpabuf_free(plain);
1961 :
1962 29 : wps->wps_pin_revealed = 1;
1963 29 : wps->state = RECV_M7;
1964 29 : return msg;
1965 : }
1966 :
1967 :
1968 28 : static struct wpabuf * wps_build_m8(struct wps_data *wps)
1969 : {
1970 : struct wpabuf *msg, *plain;
1971 :
1972 28 : wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
1973 :
1974 28 : plain = wpabuf_alloc(500);
1975 28 : if (plain == NULL)
1976 0 : return NULL;
1977 :
1978 28 : msg = wpabuf_alloc(1000);
1979 28 : if (msg == NULL) {
1980 0 : wpabuf_free(plain);
1981 0 : return NULL;
1982 : }
1983 :
1984 56 : if (wps_build_version(msg) ||
1985 56 : wps_build_msg_type(msg, WPS_M8) ||
1986 56 : wps_build_enrollee_nonce(wps, msg) ||
1987 56 : ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
1988 56 : (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
1989 56 : wps_build_key_wrap_auth(wps, plain) ||
1990 56 : wps_build_encr_settings(wps, msg, plain) ||
1991 56 : wps_build_wfa_ext(msg, 0, NULL, 0) ||
1992 28 : wps_build_authenticator(wps, msg)) {
1993 0 : wpabuf_free(plain);
1994 0 : wpabuf_free(msg);
1995 0 : return NULL;
1996 : }
1997 28 : wpabuf_free(plain);
1998 :
1999 28 : wps->state = RECV_DONE;
2000 28 : return msg;
2001 : }
2002 :
2003 :
2004 160 : struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2005 : enum wsc_op_code *op_code)
2006 : {
2007 : struct wpabuf *msg;
2008 :
2009 : #ifdef CONFIG_WPS_UPNP
2010 160 : if (!wps->int_reg && wps->wps->wps_upnp) {
2011 31 : struct upnp_pending_message *p, *prev = NULL;
2012 31 : if (wps->ext_reg > 1)
2013 15 : wps_registrar_free_pending_m2(wps->wps);
2014 31 : p = wps->wps->upnp_msgs;
2015 : /* TODO: check pending message MAC address */
2016 62 : while (p && p->next) {
2017 0 : prev = p;
2018 0 : p = p->next;
2019 : }
2020 31 : if (p) {
2021 23 : wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2022 : "UPnP");
2023 23 : if (prev)
2024 0 : prev->next = NULL;
2025 : else
2026 23 : wps->wps->upnp_msgs = NULL;
2027 23 : msg = p->msg;
2028 23 : switch (p->type) {
2029 : case WPS_WSC_ACK:
2030 0 : *op_code = WSC_ACK;
2031 0 : break;
2032 : case WPS_WSC_NACK:
2033 0 : *op_code = WSC_NACK;
2034 0 : break;
2035 : default:
2036 23 : *op_code = WSC_MSG;
2037 23 : break;
2038 : }
2039 23 : os_free(p);
2040 23 : if (wps->ext_reg == 0)
2041 0 : wps->ext_reg = 1;
2042 23 : return msg;
2043 : }
2044 : }
2045 137 : if (wps->ext_reg) {
2046 0 : wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2047 : "pending message available");
2048 0 : return NULL;
2049 : }
2050 : #endif /* CONFIG_WPS_UPNP */
2051 :
2052 137 : switch (wps->state) {
2053 : case SEND_M2:
2054 46 : if (wps_get_dev_password(wps) < 0)
2055 10 : msg = wps_build_m2d(wps);
2056 : else
2057 36 : msg = wps_build_m2(wps);
2058 46 : *op_code = WSC_MSG;
2059 46 : break;
2060 : case SEND_M2D:
2061 4 : msg = wps_build_m2d(wps);
2062 4 : *op_code = WSC_MSG;
2063 4 : break;
2064 : case SEND_M4:
2065 30 : msg = wps_build_m4(wps);
2066 30 : *op_code = WSC_MSG;
2067 30 : break;
2068 : case SEND_M6:
2069 29 : msg = wps_build_m6(wps);
2070 29 : *op_code = WSC_MSG;
2071 29 : break;
2072 : case SEND_M8:
2073 28 : msg = wps_build_m8(wps);
2074 28 : *op_code = WSC_MSG;
2075 28 : break;
2076 : case RECV_DONE:
2077 0 : msg = wps_build_wsc_ack(wps);
2078 0 : *op_code = WSC_ACK;
2079 0 : break;
2080 : case SEND_WSC_NACK:
2081 0 : msg = wps_build_wsc_nack(wps);
2082 0 : *op_code = WSC_NACK;
2083 0 : break;
2084 : default:
2085 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2086 0 : "a message", wps->state);
2087 0 : msg = NULL;
2088 0 : break;
2089 : }
2090 :
2091 137 : if (*op_code == WSC_MSG && msg) {
2092 : /* Save a copy of the last message for Authenticator derivation
2093 : */
2094 137 : wpabuf_free(wps->last_msg);
2095 137 : wps->last_msg = wpabuf_dup(msg);
2096 : }
2097 :
2098 137 : return msg;
2099 : }
2100 :
2101 :
2102 50 : static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2103 : {
2104 50 : if (e_nonce == NULL) {
2105 0 : wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2106 0 : return -1;
2107 : }
2108 :
2109 50 : os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2110 50 : wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2111 50 : wps->nonce_e, WPS_NONCE_LEN);
2112 :
2113 50 : return 0;
2114 : }
2115 :
2116 :
2117 87 : static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2118 : {
2119 87 : if (r_nonce == NULL) {
2120 0 : wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2121 0 : return -1;
2122 : }
2123 :
2124 87 : if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2125 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2126 0 : return -1;
2127 : }
2128 :
2129 87 : return 0;
2130 : }
2131 :
2132 :
2133 50 : static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2134 : {
2135 50 : if (uuid_e == NULL) {
2136 0 : wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2137 0 : return -1;
2138 : }
2139 :
2140 50 : os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2141 50 : wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2142 :
2143 50 : return 0;
2144 : }
2145 :
2146 :
2147 50 : static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2148 : {
2149 50 : if (pw_id == NULL) {
2150 0 : wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2151 0 : return -1;
2152 : }
2153 :
2154 50 : wps->dev_pw_id = WPA_GET_BE16(pw_id);
2155 50 : wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2156 :
2157 50 : return 0;
2158 : }
2159 :
2160 :
2161 30 : static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2162 : {
2163 30 : if (e_hash1 == NULL) {
2164 0 : wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2165 0 : return -1;
2166 : }
2167 :
2168 30 : os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2169 30 : wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2170 :
2171 30 : return 0;
2172 : }
2173 :
2174 :
2175 30 : static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2176 : {
2177 30 : if (e_hash2 == NULL) {
2178 0 : wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2179 0 : return -1;
2180 : }
2181 :
2182 30 : os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2183 30 : wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2184 :
2185 30 : return 0;
2186 : }
2187 :
2188 :
2189 29 : static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2190 : {
2191 : u8 hash[SHA256_MAC_LEN];
2192 : const u8 *addr[4];
2193 : size_t len[4];
2194 :
2195 29 : if (e_snonce1 == NULL) {
2196 0 : wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2197 0 : return -1;
2198 : }
2199 :
2200 29 : wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2201 : WPS_SECRET_NONCE_LEN);
2202 :
2203 : /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2204 29 : addr[0] = e_snonce1;
2205 29 : len[0] = WPS_SECRET_NONCE_LEN;
2206 29 : addr[1] = wps->psk1;
2207 29 : len[1] = WPS_PSK_LEN;
2208 29 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
2209 29 : len[2] = wpabuf_len(wps->dh_pubkey_e);
2210 29 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
2211 29 : len[3] = wpabuf_len(wps->dh_pubkey_r);
2212 29 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2213 :
2214 29 : if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2215 0 : wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2216 : "not match with the pre-committed value");
2217 0 : wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2218 0 : wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2219 0 : return -1;
2220 : }
2221 :
2222 29 : wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2223 : "half of the device password");
2224 :
2225 29 : return 0;
2226 : }
2227 :
2228 :
2229 28 : static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2230 : {
2231 : u8 hash[SHA256_MAC_LEN];
2232 : const u8 *addr[4];
2233 : size_t len[4];
2234 :
2235 28 : if (e_snonce2 == NULL) {
2236 0 : wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2237 0 : return -1;
2238 : }
2239 :
2240 28 : wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2241 : WPS_SECRET_NONCE_LEN);
2242 :
2243 : /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2244 28 : addr[0] = e_snonce2;
2245 28 : len[0] = WPS_SECRET_NONCE_LEN;
2246 28 : addr[1] = wps->psk2;
2247 28 : len[1] = WPS_PSK_LEN;
2248 28 : addr[2] = wpabuf_head(wps->dh_pubkey_e);
2249 28 : len[2] = wpabuf_len(wps->dh_pubkey_e);
2250 28 : addr[3] = wpabuf_head(wps->dh_pubkey_r);
2251 28 : len[3] = wpabuf_len(wps->dh_pubkey_r);
2252 28 : hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2253 :
2254 28 : if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2255 0 : wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2256 : "not match with the pre-committed value");
2257 0 : wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2258 0 : wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2259 0 : wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2260 0 : return -1;
2261 : }
2262 :
2263 28 : wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2264 : "half of the device password");
2265 28 : wps->wps_pin_revealed = 0;
2266 28 : wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2267 :
2268 : /*
2269 : * In case wildcard PIN is used and WPS handshake succeeds in the first
2270 : * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2271 : * sure the PIN gets invalidated here.
2272 : */
2273 28 : wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2274 :
2275 28 : return 0;
2276 : }
2277 :
2278 :
2279 50 : static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2280 : {
2281 50 : if (mac_addr == NULL) {
2282 0 : wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2283 0 : return -1;
2284 : }
2285 :
2286 300 : wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2287 300 : MAC2STR(mac_addr));
2288 50 : os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2289 50 : os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2290 :
2291 50 : return 0;
2292 : }
2293 :
2294 :
2295 50 : static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2296 : size_t pk_len)
2297 : {
2298 50 : if (pk == NULL || pk_len == 0) {
2299 0 : wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2300 0 : return -1;
2301 : }
2302 :
2303 50 : wpabuf_free(wps->dh_pubkey_e);
2304 50 : wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2305 50 : if (wps->dh_pubkey_e == NULL)
2306 0 : return -1;
2307 :
2308 50 : return 0;
2309 : }
2310 :
2311 :
2312 50 : static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2313 : {
2314 : u16 auth_types;
2315 :
2316 50 : if (auth == NULL) {
2317 0 : wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2318 : "received");
2319 0 : return -1;
2320 : }
2321 :
2322 50 : auth_types = WPA_GET_BE16(auth);
2323 :
2324 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2325 : auth_types);
2326 50 : wps->auth_type = wps->wps->auth_types & auth_types;
2327 50 : if (wps->auth_type == 0) {
2328 0 : wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2329 : "authentication types (own 0x%x Enrollee 0x%x)",
2330 0 : wps->wps->auth_types, auth_types);
2331 : #ifdef WPS_WORKAROUNDS
2332 : /*
2333 : * Some deployed implementations seem to advertise incorrect
2334 : * information in this attribute. For example, Linksys WRT350N
2335 : * seems to have a byteorder bug that breaks this negotiation.
2336 : * In order to interoperate with existing implementations,
2337 : * assume that the Enrollee supports everything we do.
2338 : */
2339 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2340 : "does not advertise supported authentication types "
2341 : "correctly");
2342 0 : wps->auth_type = wps->wps->auth_types;
2343 : #else /* WPS_WORKAROUNDS */
2344 : return -1;
2345 : #endif /* WPS_WORKAROUNDS */
2346 : }
2347 :
2348 50 : return 0;
2349 : }
2350 :
2351 :
2352 50 : static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2353 : {
2354 : u16 encr_types;
2355 :
2356 50 : if (encr == NULL) {
2357 0 : wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2358 : "received");
2359 0 : return -1;
2360 : }
2361 :
2362 50 : encr_types = WPA_GET_BE16(encr);
2363 :
2364 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2365 : encr_types);
2366 50 : wps->encr_type = wps->wps->encr_types & encr_types;
2367 50 : if (wps->encr_type == 0) {
2368 0 : wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2369 : "encryption types (own 0x%x Enrollee 0x%x)",
2370 0 : wps->wps->encr_types, encr_types);
2371 : #ifdef WPS_WORKAROUNDS
2372 : /*
2373 : * Some deployed implementations seem to advertise incorrect
2374 : * information in this attribute. For example, Linksys WRT350N
2375 : * seems to have a byteorder bug that breaks this negotiation.
2376 : * In order to interoperate with existing implementations,
2377 : * assume that the Enrollee supports everything we do.
2378 : */
2379 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2380 : "does not advertise supported encryption types "
2381 : "correctly");
2382 0 : wps->encr_type = wps->wps->encr_types;
2383 : #else /* WPS_WORKAROUNDS */
2384 : return -1;
2385 : #endif /* WPS_WORKAROUNDS */
2386 : }
2387 :
2388 50 : return 0;
2389 : }
2390 :
2391 :
2392 50 : static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2393 : {
2394 50 : if (conn == NULL) {
2395 0 : wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2396 : "received");
2397 0 : return -1;
2398 : }
2399 :
2400 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2401 50 : *conn);
2402 :
2403 50 : return 0;
2404 : }
2405 :
2406 :
2407 50 : static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2408 : {
2409 : u16 m;
2410 :
2411 50 : if (methods == NULL) {
2412 0 : wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2413 0 : return -1;
2414 : }
2415 :
2416 50 : m = WPA_GET_BE16(methods);
2417 :
2418 450 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2419 : "%s%s%s%s%s%s%s%s%s", m,
2420 50 : m & WPS_CONFIG_USBA ? " [USBA]" : "",
2421 50 : m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2422 50 : m & WPS_CONFIG_LABEL ? " [Label]" : "",
2423 50 : m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2424 50 : m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2425 50 : m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2426 50 : m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2427 50 : m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2428 50 : m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2429 :
2430 50 : if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2431 : /*
2432 : * The Enrollee does not have a display so it is unlikely to be
2433 : * able to show the passphrase to a user and as such, could
2434 : * benefit from receiving PSK to reduce key derivation time.
2435 : */
2436 0 : wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2437 : "Enrollee not supporting display");
2438 0 : wps->use_psk_key = 1;
2439 : }
2440 :
2441 50 : return 0;
2442 : }
2443 :
2444 :
2445 50 : static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2446 : {
2447 50 : if (state == NULL) {
2448 0 : wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2449 : "received");
2450 0 : return -1;
2451 : }
2452 :
2453 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2454 50 : *state);
2455 :
2456 50 : return 0;
2457 : }
2458 :
2459 :
2460 50 : static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2461 : {
2462 : u16 a;
2463 :
2464 50 : if (assoc == NULL) {
2465 0 : wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2466 0 : return -1;
2467 : }
2468 :
2469 50 : a = WPA_GET_BE16(assoc);
2470 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2471 :
2472 50 : return 0;
2473 : }
2474 :
2475 :
2476 50 : static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2477 : {
2478 : u16 e;
2479 :
2480 50 : if (err == NULL) {
2481 0 : wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2482 0 : return -1;
2483 : }
2484 :
2485 50 : e = WPA_GET_BE16(err);
2486 50 : wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2487 :
2488 50 : return 0;
2489 : }
2490 :
2491 :
2492 17 : static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2493 : {
2494 : #ifdef CONFIG_P2P
2495 : struct wps_registrar *reg = wps->wps->registrar;
2496 :
2497 : if (is_zero_ether_addr(reg->p2p_dev_addr))
2498 : return 1; /* no filtering in use */
2499 :
2500 : if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2501 : wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2502 : "filtering for PBC: expected " MACSTR " was "
2503 : MACSTR " - indicate PBC session overlap",
2504 : MAC2STR(reg->p2p_dev_addr),
2505 : MAC2STR(wps->p2p_dev_addr));
2506 : return 0;
2507 : }
2508 : #endif /* CONFIG_P2P */
2509 17 : return 1;
2510 : }
2511 :
2512 :
2513 2 : static int wps_registrar_skip_overlap(struct wps_data *wps)
2514 : {
2515 : #ifdef CONFIG_P2P
2516 : struct wps_registrar *reg = wps->wps->registrar;
2517 :
2518 : if (is_zero_ether_addr(reg->p2p_dev_addr))
2519 : return 0; /* no specific Enrollee selected */
2520 :
2521 : if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2522 : wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2523 : "Enrollee match");
2524 : return 1;
2525 : }
2526 : #endif /* CONFIG_P2P */
2527 2 : return 0;
2528 : }
2529 :
2530 :
2531 50 : static enum wps_process_res wps_process_m1(struct wps_data *wps,
2532 : struct wps_parse_attr *attr)
2533 : {
2534 50 : wpa_printf(MSG_DEBUG, "WPS: Received M1");
2535 :
2536 50 : if (wps->state != RECV_M1) {
2537 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2538 0 : "receiving M1", wps->state);
2539 0 : return WPS_FAILURE;
2540 : }
2541 :
2542 100 : if (wps_process_uuid_e(wps, attr->uuid_e) ||
2543 100 : wps_process_mac_addr(wps, attr->mac_addr) ||
2544 100 : wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2545 100 : wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2546 100 : wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2547 100 : wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2548 100 : wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2549 100 : wps_process_config_methods(wps, attr->config_methods) ||
2550 100 : wps_process_wps_state(wps, attr->wps_state) ||
2551 100 : wps_process_device_attrs(&wps->peer_dev, attr) ||
2552 100 : wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2553 100 : wps_process_assoc_state(wps, attr->assoc_state) ||
2554 100 : wps_process_dev_password_id(wps, attr->dev_password_id) ||
2555 100 : wps_process_config_error(wps, attr->config_error) ||
2556 50 : wps_process_os_version(&wps->peer_dev, attr->os_version))
2557 0 : return WPS_FAILURE;
2558 :
2559 97 : if (wps->dev_pw_id < 0x10 &&
2560 77 : wps->dev_pw_id != DEV_PW_DEFAULT &&
2561 60 : wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2562 60 : wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2563 60 : wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2564 : #ifdef CONFIG_WPS_NFC
2565 50 : wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2566 : #endif /* CONFIG_WPS_NFC */
2567 40 : (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2568 20 : !wps->wps->registrar->pbc)) {
2569 1 : wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2570 1 : wps->dev_pw_id);
2571 1 : wps->state = SEND_M2D;
2572 1 : return WPS_CONTINUE;
2573 : }
2574 :
2575 : #ifdef CONFIG_WPS_NFC
2576 95 : if (wps->dev_pw_id >= 0x10 ||
2577 46 : wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2578 : struct wps_nfc_pw_token *token;
2579 : const u8 *addr[1];
2580 : u8 hash[WPS_HASH_LEN];
2581 :
2582 26 : wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2583 26 : wps->dev_pw_id, wps->wps, wps->wps->registrar);
2584 26 : token = wps_get_nfc_pw_token(
2585 26 : &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2586 13 : if (token && token->peer_pk_hash_known) {
2587 9 : wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2588 : "Password Token");
2589 9 : dl_list_del(&token->list);
2590 9 : wps->nfc_pw_token = token;
2591 :
2592 9 : addr[0] = attr->public_key;
2593 9 : sha256_vector(1, addr, &attr->public_key_len, hash);
2594 17 : if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash,
2595 : WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2596 1 : wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2597 : "mismatch");
2598 1 : wps->state = SEND_M2D;
2599 1 : wps->config_error =
2600 : WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2601 1 : return WPS_CONTINUE;
2602 : }
2603 4 : } else if (token) {
2604 0 : wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2605 : "Password Token (no peer PK hash)");
2606 0 : wps->nfc_pw_token = token;
2607 5 : } else if (wps->dev_pw_id >= 0x10 &&
2608 1 : wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2609 0 : wps->wps->ap_nfc_dev_pw) {
2610 0 : wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2611 : }
2612 : }
2613 : #endif /* CONFIG_WPS_NFC */
2614 :
2615 48 : if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2616 36 : if ((wps->wps->registrar->force_pbc_overlap ||
2617 17 : wps_registrar_pbc_overlap(wps->wps->registrar,
2618 34 : wps->mac_addr_e, wps->uuid_e) ||
2619 19 : !wps_registrar_p2p_dev_addr_match(wps)) &&
2620 2 : !wps_registrar_skip_overlap(wps)) {
2621 2 : wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2622 : "negotiation");
2623 2 : wps->state = SEND_M2D;
2624 2 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2625 2 : wps_pbc_overlap_event(wps->wps);
2626 2 : wps_fail_event(wps->wps, WPS_M1,
2627 : WPS_CFG_MULTIPLE_PBC_DETECTED,
2628 2 : WPS_EI_NO_ERROR, wps->mac_addr_e);
2629 2 : wps->wps->registrar->force_pbc_overlap = 1;
2630 2 : return WPS_CONTINUE;
2631 : }
2632 17 : wps_registrar_add_pbc_session(wps->wps->registrar,
2633 17 : wps->mac_addr_e, wps->uuid_e);
2634 17 : wps->pbc = 1;
2635 : }
2636 :
2637 : #ifdef WPS_WORKAROUNDS
2638 : /*
2639 : * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2640 : * passphrase format. To avoid interop issues, force PSK format to be
2641 : * used.
2642 : */
2643 92 : if (!wps->use_psk_key &&
2644 92 : wps->peer_dev.manufacturer &&
2645 46 : os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2646 0 : wps->peer_dev.model_name &&
2647 0 : os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2648 0 : wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2649 : "PSK format");
2650 0 : wps->use_psk_key = 1;
2651 : }
2652 : #endif /* WPS_WORKAROUNDS */
2653 :
2654 46 : wps->state = SEND_M2;
2655 46 : return WPS_CONTINUE;
2656 : }
2657 :
2658 :
2659 30 : static enum wps_process_res wps_process_m3(struct wps_data *wps,
2660 : const struct wpabuf *msg,
2661 : struct wps_parse_attr *attr)
2662 : {
2663 30 : wpa_printf(MSG_DEBUG, "WPS: Received M3");
2664 :
2665 30 : if (wps->state != RECV_M3) {
2666 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2667 0 : "receiving M3", wps->state);
2668 0 : wps->state = SEND_WSC_NACK;
2669 0 : return WPS_CONTINUE;
2670 : }
2671 :
2672 30 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2673 0 : !wps_registrar_skip_overlap(wps)) {
2674 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2675 : "session overlap");
2676 0 : wps->state = SEND_WSC_NACK;
2677 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2678 0 : return WPS_CONTINUE;
2679 : }
2680 :
2681 60 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2682 60 : wps_process_authenticator(wps, attr->authenticator, msg) ||
2683 60 : wps_process_e_hash1(wps, attr->e_hash1) ||
2684 30 : wps_process_e_hash2(wps, attr->e_hash2)) {
2685 0 : wps->state = SEND_WSC_NACK;
2686 0 : return WPS_CONTINUE;
2687 : }
2688 :
2689 30 : wps->state = SEND_M4;
2690 30 : return WPS_CONTINUE;
2691 : }
2692 :
2693 :
2694 29 : static enum wps_process_res wps_process_m5(struct wps_data *wps,
2695 : const struct wpabuf *msg,
2696 : struct wps_parse_attr *attr)
2697 : {
2698 : struct wpabuf *decrypted;
2699 : struct wps_parse_attr eattr;
2700 :
2701 29 : wpa_printf(MSG_DEBUG, "WPS: Received M5");
2702 :
2703 29 : if (wps->state != RECV_M5) {
2704 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2705 0 : "receiving M5", wps->state);
2706 0 : wps->state = SEND_WSC_NACK;
2707 0 : return WPS_CONTINUE;
2708 : }
2709 :
2710 29 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2711 0 : !wps_registrar_skip_overlap(wps)) {
2712 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2713 : "session overlap");
2714 0 : wps->state = SEND_WSC_NACK;
2715 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2716 0 : return WPS_CONTINUE;
2717 : }
2718 :
2719 58 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2720 29 : wps_process_authenticator(wps, attr->authenticator, msg)) {
2721 0 : wps->state = SEND_WSC_NACK;
2722 0 : return WPS_CONTINUE;
2723 : }
2724 :
2725 29 : decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2726 : attr->encr_settings_len);
2727 29 : if (decrypted == NULL) {
2728 0 : wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2729 : "Settings attribute");
2730 0 : wps->state = SEND_WSC_NACK;
2731 0 : return WPS_CONTINUE;
2732 : }
2733 :
2734 29 : if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2735 0 : wpabuf_free(decrypted);
2736 0 : wps->state = SEND_WSC_NACK;
2737 0 : return WPS_CONTINUE;
2738 : }
2739 :
2740 29 : wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2741 : "attribute");
2742 58 : if (wps_parse_msg(decrypted, &eattr) < 0 ||
2743 58 : wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2744 29 : wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2745 0 : wpabuf_free(decrypted);
2746 0 : wps->state = SEND_WSC_NACK;
2747 0 : return WPS_CONTINUE;
2748 : }
2749 29 : wpabuf_free(decrypted);
2750 :
2751 29 : wps->state = SEND_M6;
2752 29 : return WPS_CONTINUE;
2753 : }
2754 :
2755 :
2756 0 : static void wps_sta_cred_cb(struct wps_data *wps)
2757 : {
2758 : /*
2759 : * Update credential to only include a single authentication and
2760 : * encryption type in case the AP configuration includes more than one
2761 : * option.
2762 : */
2763 0 : if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2764 0 : wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2765 0 : else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2766 0 : wps->cred.auth_type = WPS_AUTH_WPAPSK;
2767 0 : if (wps->cred.encr_type & WPS_ENCR_AES)
2768 0 : wps->cred.encr_type = WPS_ENCR_AES;
2769 0 : else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2770 0 : wps->cred.encr_type = WPS_ENCR_TKIP;
2771 0 : wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2772 : "AP configuration");
2773 0 : if (wps->wps->cred_cb)
2774 0 : wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2775 0 : }
2776 :
2777 :
2778 0 : static void wps_cred_update(struct wps_credential *dst,
2779 : struct wps_credential *src)
2780 : {
2781 0 : os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2782 0 : dst->ssid_len = src->ssid_len;
2783 0 : dst->auth_type = src->auth_type;
2784 0 : dst->encr_type = src->encr_type;
2785 0 : dst->key_idx = src->key_idx;
2786 0 : os_memcpy(dst->key, src->key, sizeof(dst->key));
2787 0 : dst->key_len = src->key_len;
2788 0 : }
2789 :
2790 :
2791 28 : static int wps_process_ap_settings_r(struct wps_data *wps,
2792 : struct wps_parse_attr *attr)
2793 : {
2794 : struct wpabuf *msg;
2795 :
2796 28 : if (wps->wps->ap || wps->er)
2797 28 : return 0;
2798 :
2799 : /* AP Settings Attributes in M7 when Enrollee is an AP */
2800 0 : if (wps_process_ap_settings(attr, &wps->cred) < 0)
2801 0 : return -1;
2802 :
2803 0 : wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2804 :
2805 0 : if (wps->new_ap_settings) {
2806 0 : wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2807 : "new settings");
2808 0 : wps_cred_update(&wps->cred, wps->new_ap_settings);
2809 0 : return 0;
2810 : } else {
2811 : /*
2812 : * Use the AP PIN only to receive the current AP settings, not
2813 : * to reconfigure the AP.
2814 : */
2815 :
2816 : /*
2817 : * Clear selected registrar here since we do not get to
2818 : * WSC_Done in this protocol run.
2819 : */
2820 0 : wps_registrar_pin_completed(wps->wps->registrar);
2821 :
2822 0 : msg = wps_build_ap_cred(wps);
2823 0 : if (msg == NULL)
2824 0 : return -1;
2825 0 : wps->cred.cred_attr = wpabuf_head(msg);
2826 0 : wps->cred.cred_attr_len = wpabuf_len(msg);
2827 :
2828 0 : if (wps->ap_settings_cb) {
2829 0 : wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2830 0 : &wps->cred);
2831 0 : wpabuf_free(msg);
2832 0 : return 1;
2833 : }
2834 0 : wps_sta_cred_cb(wps);
2835 :
2836 0 : wps->cred.cred_attr = NULL;
2837 0 : wps->cred.cred_attr_len = 0;
2838 0 : wpabuf_free(msg);
2839 :
2840 0 : return 1;
2841 : }
2842 : }
2843 :
2844 :
2845 28 : static enum wps_process_res wps_process_m7(struct wps_data *wps,
2846 : const struct wpabuf *msg,
2847 : struct wps_parse_attr *attr)
2848 : {
2849 : struct wpabuf *decrypted;
2850 : struct wps_parse_attr eattr;
2851 :
2852 28 : wpa_printf(MSG_DEBUG, "WPS: Received M7");
2853 :
2854 28 : if (wps->state != RECV_M7) {
2855 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2856 0 : "receiving M7", wps->state);
2857 0 : wps->state = SEND_WSC_NACK;
2858 0 : return WPS_CONTINUE;
2859 : }
2860 :
2861 28 : if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2862 0 : !wps_registrar_skip_overlap(wps)) {
2863 0 : wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2864 : "session overlap");
2865 0 : wps->state = SEND_WSC_NACK;
2866 0 : wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2867 0 : return WPS_CONTINUE;
2868 : }
2869 :
2870 56 : if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2871 28 : wps_process_authenticator(wps, attr->authenticator, msg)) {
2872 0 : wps->state = SEND_WSC_NACK;
2873 0 : return WPS_CONTINUE;
2874 : }
2875 :
2876 28 : decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2877 : attr->encr_settings_len);
2878 28 : if (decrypted == NULL) {
2879 0 : wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2880 : "Settings attribute");
2881 0 : wps->state = SEND_WSC_NACK;
2882 0 : return WPS_CONTINUE;
2883 : }
2884 :
2885 28 : if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2886 28 : attr->version2 != NULL) < 0) {
2887 0 : wpabuf_free(decrypted);
2888 0 : wps->state = SEND_WSC_NACK;
2889 0 : return WPS_CONTINUE;
2890 : }
2891 :
2892 28 : wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2893 : "attribute");
2894 56 : if (wps_parse_msg(decrypted, &eattr) < 0 ||
2895 56 : wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2896 56 : wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2897 28 : wps_process_ap_settings_r(wps, &eattr)) {
2898 0 : wpabuf_free(decrypted);
2899 0 : wps->state = SEND_WSC_NACK;
2900 0 : return WPS_CONTINUE;
2901 : }
2902 :
2903 28 : wpabuf_free(decrypted);
2904 :
2905 28 : wps->state = SEND_M8;
2906 28 : return WPS_CONTINUE;
2907 : }
2908 :
2909 :
2910 137 : static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2911 : const struct wpabuf *msg)
2912 : {
2913 : struct wps_parse_attr attr;
2914 137 : enum wps_process_res ret = WPS_CONTINUE;
2915 :
2916 137 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2917 :
2918 137 : if (wps_parse_msg(msg, &attr) < 0)
2919 0 : return WPS_FAILURE;
2920 :
2921 137 : if (attr.msg_type == NULL) {
2922 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2923 0 : wps->state = SEND_WSC_NACK;
2924 0 : return WPS_CONTINUE;
2925 : }
2926 :
2927 224 : if (*attr.msg_type != WPS_M1 &&
2928 174 : (attr.registrar_nonce == NULL ||
2929 87 : os_memcmp(wps->nonce_r, attr.registrar_nonce,
2930 : WPS_NONCE_LEN) != 0)) {
2931 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2932 0 : return WPS_FAILURE;
2933 : }
2934 :
2935 137 : switch (*attr.msg_type) {
2936 : case WPS_M1:
2937 50 : if (wps_validate_m1(msg) < 0)
2938 0 : return WPS_FAILURE;
2939 : #ifdef CONFIG_WPS_UPNP
2940 50 : if (wps->wps->wps_upnp && attr.mac_addr) {
2941 : /* Remove old pending messages when starting new run */
2942 8 : wps_free_pending_msgs(wps->wps->upnp_msgs);
2943 8 : wps->wps->upnp_msgs = NULL;
2944 :
2945 16 : upnp_wps_device_send_wlan_event(
2946 8 : wps->wps->wps_upnp, attr.mac_addr,
2947 : UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
2948 : }
2949 : #endif /* CONFIG_WPS_UPNP */
2950 50 : ret = wps_process_m1(wps, &attr);
2951 50 : break;
2952 : case WPS_M3:
2953 30 : if (wps_validate_m3(msg) < 0)
2954 0 : return WPS_FAILURE;
2955 30 : ret = wps_process_m3(wps, msg, &attr);
2956 30 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2957 0 : wps_fail_event(wps->wps, WPS_M3, wps->config_error,
2958 0 : wps->error_indication, wps->mac_addr_e);
2959 30 : break;
2960 : case WPS_M5:
2961 29 : if (wps_validate_m5(msg) < 0)
2962 0 : return WPS_FAILURE;
2963 29 : ret = wps_process_m5(wps, msg, &attr);
2964 29 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2965 0 : wps_fail_event(wps->wps, WPS_M5, wps->config_error,
2966 0 : wps->error_indication, wps->mac_addr_e);
2967 29 : break;
2968 : case WPS_M7:
2969 28 : if (wps_validate_m7(msg) < 0)
2970 0 : return WPS_FAILURE;
2971 28 : ret = wps_process_m7(wps, msg, &attr);
2972 28 : if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
2973 0 : wps_fail_event(wps->wps, WPS_M7, wps->config_error,
2974 0 : wps->error_indication, wps->mac_addr_e);
2975 28 : break;
2976 : default:
2977 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
2978 0 : *attr.msg_type);
2979 0 : return WPS_FAILURE;
2980 : }
2981 :
2982 137 : if (ret == WPS_CONTINUE) {
2983 : /* Save a copy of the last message for Authenticator derivation
2984 : */
2985 137 : wpabuf_free(wps->last_msg);
2986 137 : wps->last_msg = wpabuf_dup(msg);
2987 : }
2988 :
2989 137 : return ret;
2990 : }
2991 :
2992 :
2993 21 : static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
2994 : const struct wpabuf *msg)
2995 : {
2996 : struct wps_parse_attr attr;
2997 :
2998 21 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
2999 :
3000 21 : if (wps_parse_msg(msg, &attr) < 0)
3001 0 : return WPS_FAILURE;
3002 :
3003 21 : if (attr.msg_type == NULL) {
3004 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3005 0 : return WPS_FAILURE;
3006 : }
3007 :
3008 21 : if (*attr.msg_type != WPS_WSC_ACK) {
3009 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3010 0 : *attr.msg_type);
3011 0 : return WPS_FAILURE;
3012 : }
3013 :
3014 : #ifdef CONFIG_WPS_UPNP
3015 30 : if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3016 9 : upnp_wps_subscribers(wps->wps->wps_upnp)) {
3017 9 : if (wps->wps->upnp_msgs)
3018 8 : return WPS_CONTINUE;
3019 1 : wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3020 : "external Registrar");
3021 1 : return WPS_PENDING;
3022 : }
3023 : #endif /* CONFIG_WPS_UPNP */
3024 :
3025 24 : if (attr.registrar_nonce == NULL ||
3026 12 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3027 : {
3028 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3029 0 : return WPS_FAILURE;
3030 : }
3031 :
3032 24 : if (attr.enrollee_nonce == NULL ||
3033 12 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3034 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3035 0 : return WPS_FAILURE;
3036 : }
3037 :
3038 12 : if (wps->state == RECV_M2D_ACK) {
3039 : #ifdef CONFIG_WPS_UPNP
3040 20 : if (wps->wps->wps_upnp &&
3041 8 : upnp_wps_subscribers(wps->wps->wps_upnp)) {
3042 8 : if (wps->wps->upnp_msgs)
3043 0 : return WPS_CONTINUE;
3044 8 : if (wps->ext_reg == 0)
3045 8 : wps->ext_reg = 1;
3046 8 : wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3047 : "external Registrar");
3048 8 : return WPS_PENDING;
3049 : }
3050 : #endif /* CONFIG_WPS_UPNP */
3051 :
3052 4 : wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3053 : "terminate negotiation");
3054 : }
3055 :
3056 4 : return WPS_FAILURE;
3057 : }
3058 :
3059 :
3060 5 : static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3061 : const struct wpabuf *msg)
3062 : {
3063 : struct wps_parse_attr attr;
3064 : int old_state;
3065 : u16 config_error;
3066 :
3067 5 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3068 :
3069 5 : old_state = wps->state;
3070 5 : wps->state = SEND_WSC_NACK;
3071 :
3072 5 : if (wps_parse_msg(msg, &attr) < 0)
3073 0 : return WPS_FAILURE;
3074 :
3075 5 : if (attr.msg_type == NULL) {
3076 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3077 0 : return WPS_FAILURE;
3078 : }
3079 :
3080 5 : if (*attr.msg_type != WPS_WSC_NACK) {
3081 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3082 0 : *attr.msg_type);
3083 0 : return WPS_FAILURE;
3084 : }
3085 :
3086 : #ifdef CONFIG_WPS_UPNP
3087 5 : if (wps->wps->wps_upnp && wps->ext_reg) {
3088 1 : wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3089 : "Registrar terminated by the Enrollee");
3090 1 : return WPS_FAILURE;
3091 : }
3092 : #endif /* CONFIG_WPS_UPNP */
3093 :
3094 8 : if (attr.registrar_nonce == NULL ||
3095 4 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3096 : {
3097 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3098 0 : return WPS_FAILURE;
3099 : }
3100 :
3101 8 : if (attr.enrollee_nonce == NULL ||
3102 4 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3103 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3104 0 : return WPS_FAILURE;
3105 : }
3106 :
3107 4 : if (attr.config_error == NULL) {
3108 0 : wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3109 : "in WSC_NACK");
3110 0 : return WPS_FAILURE;
3111 : }
3112 :
3113 4 : config_error = WPA_GET_BE16(attr.config_error);
3114 4 : wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3115 : "Configuration Error %d", config_error);
3116 :
3117 4 : switch (old_state) {
3118 : case RECV_M3:
3119 0 : wps_fail_event(wps->wps, WPS_M2, config_error,
3120 0 : wps->error_indication, wps->mac_addr_e);
3121 0 : break;
3122 : case RECV_M5:
3123 1 : wps_fail_event(wps->wps, WPS_M4, config_error,
3124 1 : wps->error_indication, wps->mac_addr_e);
3125 1 : break;
3126 : case RECV_M7:
3127 1 : wps_fail_event(wps->wps, WPS_M6, config_error,
3128 1 : wps->error_indication, wps->mac_addr_e);
3129 1 : break;
3130 : case RECV_DONE:
3131 2 : wps_fail_event(wps->wps, WPS_M8, config_error,
3132 2 : wps->error_indication, wps->mac_addr_e);
3133 2 : break;
3134 : default:
3135 0 : break;
3136 : }
3137 :
3138 4 : return WPS_FAILURE;
3139 : }
3140 :
3141 :
3142 38 : static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3143 : const struct wpabuf *msg)
3144 : {
3145 : struct wps_parse_attr attr;
3146 :
3147 38 : wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3148 :
3149 44 : if (wps->state != RECV_DONE &&
3150 12 : (!wps->wps->wps_upnp || !wps->ext_reg)) {
3151 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3152 0 : "receiving WSC_Done", wps->state);
3153 0 : return WPS_FAILURE;
3154 : }
3155 :
3156 38 : if (wps_parse_msg(msg, &attr) < 0)
3157 0 : return WPS_FAILURE;
3158 :
3159 38 : if (attr.msg_type == NULL) {
3160 0 : wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3161 0 : return WPS_FAILURE;
3162 : }
3163 :
3164 38 : if (*attr.msg_type != WPS_WSC_DONE) {
3165 0 : wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3166 0 : *attr.msg_type);
3167 0 : return WPS_FAILURE;
3168 : }
3169 :
3170 : #ifdef CONFIG_WPS_UPNP
3171 38 : if (wps->wps->wps_upnp && wps->ext_reg) {
3172 6 : wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3173 : "Registrar completed successfully");
3174 6 : wps_device_store(wps->wps->registrar, &wps->peer_dev,
3175 6 : wps->uuid_e);
3176 6 : return WPS_DONE;
3177 : }
3178 : #endif /* CONFIG_WPS_UPNP */
3179 :
3180 64 : if (attr.registrar_nonce == NULL ||
3181 32 : os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3182 : {
3183 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3184 0 : return WPS_FAILURE;
3185 : }
3186 :
3187 64 : if (attr.enrollee_nonce == NULL ||
3188 32 : os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3189 0 : wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3190 0 : return WPS_FAILURE;
3191 : }
3192 :
3193 32 : wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3194 32 : wps_device_store(wps->wps->registrar, &wps->peer_dev,
3195 32 : wps->uuid_e);
3196 :
3197 38 : if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3198 12 : wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3199 : struct wps_credential cred;
3200 :
3201 6 : wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3202 : "on first Enrollee connection");
3203 :
3204 6 : os_memset(&cred, 0, sizeof(cred));
3205 6 : os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3206 6 : cred.ssid_len = wps->wps->ssid_len;
3207 6 : cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3208 6 : cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3209 6 : os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3210 6 : cred.key_len = wps->new_psk_len;
3211 :
3212 6 : wps->wps->wps_state = WPS_STATE_CONFIGURED;
3213 12 : wpa_hexdump_ascii_key(MSG_DEBUG,
3214 : "WPS: Generated random passphrase",
3215 6 : wps->new_psk, wps->new_psk_len);
3216 6 : if (wps->wps->cred_cb)
3217 6 : wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3218 :
3219 6 : os_free(wps->new_psk);
3220 6 : wps->new_psk = NULL;
3221 : }
3222 :
3223 32 : if (!wps->wps->ap && !wps->er)
3224 0 : wps_sta_cred_cb(wps);
3225 :
3226 32 : if (wps->new_psk) {
3227 8 : if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3228 4 : wps->p2p_dev_addr, wps->new_psk,
3229 : wps->new_psk_len)) {
3230 2 : wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3231 : "new PSK");
3232 : }
3233 4 : os_free(wps->new_psk);
3234 4 : wps->new_psk = NULL;
3235 : }
3236 :
3237 64 : wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3238 32 : wps->dev_password, wps->dev_password_len);
3239 :
3240 32 : if (wps->pbc) {
3241 16 : wps_registrar_remove_pbc_session(wps->wps->registrar,
3242 16 : wps->uuid_e,
3243 16 : wps->p2p_dev_addr);
3244 16 : wps_registrar_pbc_completed(wps->wps->registrar);
3245 : #ifdef WPS_WORKAROUNDS
3246 16 : os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3247 : #endif /* WPS_WORKAROUNDS */
3248 16 : os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3249 : WPS_UUID_LEN);
3250 : } else {
3251 16 : wps_registrar_pin_completed(wps->wps->registrar);
3252 : }
3253 : /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3254 : * merge them into APs own list.. */
3255 :
3256 32 : wps_success_event(wps->wps, wps->mac_addr_e);
3257 :
3258 32 : return WPS_DONE;
3259 : }
3260 :
3261 :
3262 231 : enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3263 : enum wsc_op_code op_code,
3264 : const struct wpabuf *msg)
3265 : {
3266 : enum wps_process_res ret;
3267 :
3268 231 : wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3269 : "op_code=%d)",
3270 : (unsigned long) wpabuf_len(msg), op_code);
3271 :
3272 : #ifdef CONFIG_WPS_UPNP
3273 231 : if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3274 : struct wps_parse_attr attr;
3275 10 : if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3276 5 : *attr.msg_type == WPS_M3)
3277 5 : wps->ext_reg = 2; /* past M2/M2D phase */
3278 : }
3279 231 : if (wps->ext_reg > 1)
3280 35 : wps_registrar_free_pending_m2(wps->wps);
3281 277 : if (wps->wps->wps_upnp && wps->ext_reg &&
3282 69 : wps->wps->upnp_msgs == NULL &&
3283 8 : (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3284 7 : {
3285 : struct wps_parse_attr attr;
3286 : int type;
3287 22 : if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3288 0 : type = -1;
3289 : else
3290 22 : type = *attr.msg_type;
3291 22 : wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3292 : " to external Registrar for processing", type);
3293 22 : upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3294 22 : wps->mac_addr_e,
3295 : UPNP_WPS_WLANEVENT_TYPE_EAP,
3296 : msg);
3297 22 : if (op_code == WSC_MSG)
3298 15 : return WPS_PENDING;
3299 209 : } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3300 15 : wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3301 : "external Registrar");
3302 15 : return WPS_CONTINUE;
3303 : }
3304 : #endif /* CONFIG_WPS_UPNP */
3305 :
3306 201 : switch (op_code) {
3307 : case WSC_MSG:
3308 137 : return wps_process_wsc_msg(wps, msg);
3309 : case WSC_ACK:
3310 21 : if (wps_validate_wsc_ack(msg) < 0)
3311 0 : return WPS_FAILURE;
3312 21 : return wps_process_wsc_ack(wps, msg);
3313 : case WSC_NACK:
3314 5 : if (wps_validate_wsc_nack(msg) < 0)
3315 0 : return WPS_FAILURE;
3316 5 : return wps_process_wsc_nack(wps, msg);
3317 : case WSC_Done:
3318 38 : if (wps_validate_wsc_done(msg) < 0)
3319 0 : return WPS_FAILURE;
3320 38 : ret = wps_process_wsc_done(wps, msg);
3321 38 : if (ret == WPS_FAILURE) {
3322 0 : wps->state = SEND_WSC_NACK;
3323 0 : wps_fail_event(wps->wps, WPS_WSC_DONE,
3324 0 : wps->config_error,
3325 0 : wps->error_indication, wps->mac_addr_e);
3326 : }
3327 38 : return ret;
3328 : default:
3329 0 : wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3330 0 : return WPS_FAILURE;
3331 : }
3332 : }
3333 :
3334 :
3335 25 : int wps_registrar_update_ie(struct wps_registrar *reg)
3336 : {
3337 25 : return wps_set_ie(reg);
3338 : }
3339 :
3340 :
3341 0 : static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3342 : void *timeout_ctx)
3343 : {
3344 0 : struct wps_registrar *reg = eloop_ctx;
3345 :
3346 0 : wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3347 : "unselect internal Registrar");
3348 0 : reg->selected_registrar = 0;
3349 0 : reg->pbc = 0;
3350 0 : wps_registrar_selected_registrar_changed(reg, 0);
3351 0 : }
3352 :
3353 :
3354 : #ifdef CONFIG_WPS_UPNP
3355 12 : static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3356 : struct subscription *s)
3357 : {
3358 : int i, j;
3359 24 : wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3360 : "config_methods=0x%x)",
3361 24 : s->dev_password_id, s->config_methods);
3362 12 : reg->sel_reg_union = 1;
3363 12 : if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3364 12 : reg->sel_reg_dev_password_id_override = s->dev_password_id;
3365 12 : if (reg->sel_reg_config_methods_override == -1)
3366 12 : reg->sel_reg_config_methods_override = 0;
3367 12 : reg->sel_reg_config_methods_override |= s->config_methods;
3368 12 : for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3369 12 : if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3370 12 : break;
3371 36 : for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3372 12 : j++) {
3373 24 : if (is_zero_ether_addr(s->authorized_macs[j]))
3374 12 : break;
3375 72 : wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3376 72 : MACSTR, MAC2STR(s->authorized_macs[j]));
3377 12 : os_memcpy(reg->authorized_macs_union[i],
3378 : s->authorized_macs[j], ETH_ALEN);
3379 12 : i++;
3380 : }
3381 12 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3382 12 : (u8 *) reg->authorized_macs_union,
3383 : sizeof(reg->authorized_macs_union));
3384 12 : }
3385 : #endif /* CONFIG_WPS_UPNP */
3386 :
3387 :
3388 135 : static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3389 : {
3390 : #ifdef CONFIG_WPS_UPNP
3391 : struct subscription *s;
3392 :
3393 135 : if (reg->wps->wps_upnp == NULL)
3394 241 : return;
3395 :
3396 47 : dl_list_for_each(s, ®->wps->wps_upnp->subscriptions,
3397 : struct subscription, list) {
3398 : struct subscr_addr *sa;
3399 18 : sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3400 18 : if (sa) {
3401 18 : wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3402 : inet_ntoa(sa->saddr.sin_addr),
3403 18 : ntohs(sa->saddr.sin_port));
3404 : }
3405 18 : if (s->selected_registrar)
3406 12 : wps_registrar_sel_reg_add(reg, s);
3407 : else
3408 6 : wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3409 : "selected");
3410 : }
3411 : #endif /* CONFIG_WPS_UPNP */
3412 : }
3413 :
3414 :
3415 : /**
3416 : * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3417 : * @reg: Registrar data from wps_registrar_init()
3418 : *
3419 : * This function is called when selected registrar state changes, e.g., when an
3420 : * AP receives a SetSelectedRegistrar UPnP message.
3421 : */
3422 135 : void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3423 : u16 dev_pw_id)
3424 : {
3425 135 : wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3426 :
3427 135 : reg->sel_reg_union = reg->selected_registrar;
3428 135 : reg->sel_reg_dev_password_id_override = -1;
3429 135 : reg->sel_reg_config_methods_override = -1;
3430 135 : os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3431 : WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3432 135 : wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3433 135 : (u8 *) reg->authorized_macs_union,
3434 : sizeof(reg->authorized_macs_union));
3435 135 : if (reg->selected_registrar) {
3436 : u16 methods;
3437 :
3438 60 : methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3439 60 : methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3440 : WPS_CONFIG_PHY_PUSHBUTTON);
3441 60 : if (reg->pbc) {
3442 24 : reg->sel_reg_dev_password_id_override =
3443 : DEV_PW_PUSHBUTTON;
3444 24 : wps_set_pushbutton(&methods, reg->wps->config_methods);
3445 36 : } else if (dev_pw_id)
3446 9 : reg->sel_reg_dev_password_id_override = dev_pw_id;
3447 60 : wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3448 : "(pbc=%d)", reg->pbc);
3449 60 : reg->sel_reg_config_methods_override = methods;
3450 : } else
3451 75 : wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3452 :
3453 135 : wps_registrar_sel_reg_union(reg);
3454 :
3455 135 : wps_set_ie(reg);
3456 135 : wps_cb_set_sel_reg(reg);
3457 135 : }
3458 :
3459 :
3460 3 : int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3461 : char *buf, size_t buflen)
3462 : {
3463 : struct wps_registrar_device *d;
3464 3 : int len = 0, ret;
3465 : char uuid[40];
3466 : char devtype[WPS_DEV_TYPE_BUFSIZE];
3467 :
3468 3 : d = wps_device_get(reg, addr);
3469 3 : if (d == NULL)
3470 0 : return 0;
3471 3 : if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3472 0 : return 0;
3473 :
3474 18 : ret = os_snprintf(buf + len, buflen - len,
3475 : "wpsUuid=%s\n"
3476 : "wpsPrimaryDeviceType=%s\n"
3477 : "wpsDeviceName=%s\n"
3478 : "wpsManufacturer=%s\n"
3479 : "wpsModelName=%s\n"
3480 : "wpsModelNumber=%s\n"
3481 : "wpsSerialNumber=%s\n",
3482 : uuid,
3483 3 : wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3484 : sizeof(devtype)),
3485 3 : d->dev.device_name ? d->dev.device_name : "",
3486 3 : d->dev.manufacturer ? d->dev.manufacturer : "",
3487 3 : d->dev.model_name ? d->dev.model_name : "",
3488 3 : d->dev.model_number ? d->dev.model_number : "",
3489 3 : d->dev.serial_number ? d->dev.serial_number : "");
3490 3 : if (ret < 0 || (size_t) ret >= buflen - len)
3491 0 : return len;
3492 3 : len += ret;
3493 :
3494 3 : return len;
3495 : }
3496 :
3497 :
3498 2 : int wps_registrar_config_ap(struct wps_registrar *reg,
3499 : struct wps_credential *cred)
3500 : {
3501 2 : wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3502 2 : if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3503 : WPS_ENCR_AES))) {
3504 0 : if (cred->encr_type & WPS_ENCR_WEP) {
3505 0 : wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3506 : "due to WEP configuration");
3507 0 : return -1;
3508 : }
3509 :
3510 0 : wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3511 0 : "invalid encr_type 0x%x", cred->encr_type);
3512 0 : return -1;
3513 : }
3514 :
3515 2 : if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3516 : WPS_ENCR_TKIP) {
3517 0 : wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3518 : "TKIP+AES");
3519 0 : cred->encr_type |= WPS_ENCR_AES;
3520 : }
3521 :
3522 2 : if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3523 : WPS_AUTH_WPAPSK) {
3524 0 : wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3525 : "WPAPSK+WPA2PSK");
3526 0 : cred->auth_type |= WPS_AUTH_WPA2PSK;
3527 : }
3528 :
3529 2 : if (reg->wps->cred_cb)
3530 2 : return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3531 :
3532 0 : return -1;
3533 : }
3534 :
3535 :
3536 : #ifdef CONFIG_WPS_NFC
3537 :
3538 9 : int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3539 : const u8 *pubkey_hash, u16 pw_id,
3540 : const u8 *dev_pw, size_t dev_pw_len,
3541 : int pk_hash_provided_oob)
3542 : {
3543 : struct wps_nfc_pw_token *token;
3544 :
3545 9 : if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3546 0 : return -1;
3547 :
3548 9 : if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3549 7 : (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3550 0 : wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3551 : "addition - missing public key hash");
3552 0 : return -1;
3553 : }
3554 :
3555 9 : wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id);
3556 :
3557 9 : token = os_zalloc(sizeof(*token));
3558 9 : if (token == NULL)
3559 0 : return -1;
3560 :
3561 9 : token->peer_pk_hash_known = pubkey_hash != NULL;
3562 9 : if (pubkey_hash)
3563 9 : os_memcpy(token->pubkey_hash, pubkey_hash,
3564 : WPS_OOB_PUBKEY_HASH_LEN);
3565 9 : token->pw_id = pw_id;
3566 9 : token->pk_hash_provided_oob = pk_hash_provided_oob;
3567 9 : if (dev_pw) {
3568 2 : wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3569 : sizeof(token->dev_pw),
3570 : dev_pw, dev_pw_len);
3571 2 : token->dev_pw_len = dev_pw_len * 2;
3572 : }
3573 :
3574 9 : dl_list_add(®->nfc_pw_tokens, &token->list);
3575 :
3576 9 : reg->selected_registrar = 1;
3577 9 : reg->pbc = 0;
3578 9 : wps_registrar_add_authorized_mac(reg,
3579 : (u8 *) "\xff\xff\xff\xff\xff\xff");
3580 9 : wps_registrar_selected_registrar_changed(reg, pw_id);
3581 9 : eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3582 9 : eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3583 : wps_registrar_set_selected_timeout,
3584 : reg, NULL);
3585 :
3586 9 : wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3587 : pw_id);
3588 :
3589 9 : return 0;
3590 : }
3591 :
3592 :
3593 2 : int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3594 : const u8 *oob_dev_pw,
3595 : size_t oob_dev_pw_len)
3596 : {
3597 : const u8 *pos, *hash, *dev_pw;
3598 : u16 id;
3599 : size_t dev_pw_len;
3600 :
3601 2 : if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3602 : oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3603 : WPS_OOB_DEVICE_PASSWORD_LEN)
3604 0 : return -1;
3605 :
3606 2 : hash = oob_dev_pw;
3607 2 : pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3608 2 : id = WPA_GET_BE16(pos);
3609 2 : dev_pw = pos + 2;
3610 2 : dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3611 :
3612 2 : wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3613 : id);
3614 :
3615 2 : wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3616 : hash, WPS_OOB_PUBKEY_HASH_LEN);
3617 2 : wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3618 :
3619 2 : return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3620 : dev_pw_len, 0);
3621 : }
3622 :
3623 :
3624 9 : void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3625 : struct wps_nfc_pw_token *token)
3626 : {
3627 9 : wps_registrar_remove_authorized_mac(reg,
3628 : (u8 *) "\xff\xff\xff\xff\xff\xff");
3629 9 : wps_registrar_selected_registrar_changed(reg, 0);
3630 :
3631 : /*
3632 : * Free the NFC password token if it was used only for a single protocol
3633 : * run. The static handover case uses the same password token multiple
3634 : * times, so do not free that case here.
3635 : */
3636 9 : if (token->peer_pk_hash_known)
3637 9 : os_free(token);
3638 9 : }
3639 :
3640 : #endif /* CONFIG_WPS_NFC */
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