1/*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2016, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "utils/includes.h"
10
11#include "utils/common.h"
12#include "utils/base64.h"
13#include "utils/eloop.h"
14#include "utils/uuid.h"
15#include "utils/list.h"
16#include "crypto/crypto.h"
17#include "crypto/sha256.h"
18#include "crypto/random.h"
19#include "common/ieee802_11_defs.h"
20#include "wps_i.h"
21#include "wps_dev_attr.h"
22#include "wps_upnp.h"
23#include "wps_upnp_i.h"
24
25#ifndef CONFIG_WPS_STRICT
26#define WPS_WORKAROUNDS
27#endif /* CONFIG_WPS_STRICT */
28
29#ifdef CONFIG_WPS_NFC
30
31struct 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
42static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
43{
44	dl_list_del(&token->list);
45	bin_clear_free(token, sizeof(*token));
46}
47
48
49static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
50{
51	struct wps_nfc_pw_token *token, *prev;
52	dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
53			      list) {
54		if (pw_id == 0 || pw_id == token->pw_id)
55			wps_remove_nfc_pw_token(token);
56	}
57}
58
59
60static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
61						      u16 pw_id)
62{
63	struct wps_nfc_pw_token *token;
64	dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
65		if (pw_id == token->pw_id)
66			return token;
67	}
68	return NULL;
69}
70
71#else /* CONFIG_WPS_NFC */
72
73#define wps_free_nfc_pw_tokens(t, p) do { } while (0)
74
75#endif /* CONFIG_WPS_NFC */
76
77
78struct 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
92static void wps_free_pin(struct wps_uuid_pin *pin)
93{
94	bin_clear_free(pin->pin, pin->pin_len);
95	os_free(pin);
96}
97
98
99static void wps_remove_pin(struct wps_uuid_pin *pin)
100{
101	dl_list_del(&pin->list);
102	wps_free_pin(pin);
103}
104
105
106static void wps_free_pins(struct dl_list *pins)
107{
108	struct wps_uuid_pin *pin, *prev;
109	dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
110		wps_remove_pin(pin);
111}
112
113
114struct 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
122static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
123{
124	struct wps_pbc_session *prev;
125
126	while (pbc) {
127		prev = pbc;
128		pbc = pbc->next;
129		os_free(prev);
130	}
131}
132
133
134struct wps_registrar_device {
135	struct wps_registrar_device *next;
136	struct wps_device_data dev;
137	u8 uuid[WPS_UUID_LEN];
138};
139
140
141struct 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
194static int wps_set_ie(struct wps_registrar *reg);
195static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
196static void wps_registrar_set_selected_timeout(void *eloop_ctx,
197					       void *timeout_ctx);
198static void wps_registrar_remove_pin(struct wps_registrar *reg,
199				     struct wps_uuid_pin *pin);
200
201
202static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
203					     const u8 *addr)
204{
205	int i;
206	wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
207		   MAC2STR(addr));
208	for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
209		if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
210			wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
211				   "already in the list");
212			return; /* already in list */
213		}
214	for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
215		os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
216			  ETH_ALEN);
217	os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
218	wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
219		    (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
220}
221
222
223static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
224						const u8 *addr)
225{
226	int i;
227	wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
228		   MAC2STR(addr));
229	for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
230		if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
231			break;
232	}
233	if (i == WPS_MAX_AUTHORIZED_MACS) {
234		wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
235			   "list");
236		return; /* not in the list */
237	}
238	for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
239		os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
240			  ETH_ALEN);
241	os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
242		  ETH_ALEN);
243	wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
244		    (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
245}
246
247
248static void wps_free_devices(struct wps_registrar_device *dev)
249{
250	struct wps_registrar_device *prev;
251
252	while (dev) {
253		prev = dev;
254		dev = dev->next;
255		wps_device_data_free(&prev->dev);
256		os_free(prev);
257	}
258}
259
260
261static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
262						    const u8 *addr)
263{
264	struct wps_registrar_device *dev;
265
266	for (dev = reg->devices; dev; dev = dev->next) {
267		if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
268			return dev;
269	}
270	return NULL;
271}
272
273
274static void wps_device_clone_data(struct wps_device_data *dst,
275				  struct wps_device_data *src)
276{
277	os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
278	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	WPS_STRDUP(device_name);
285	WPS_STRDUP(manufacturer);
286	WPS_STRDUP(model_name);
287	WPS_STRDUP(model_number);
288	WPS_STRDUP(serial_number);
289#undef WPS_STRDUP
290}
291
292
293int 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	d = wps_device_get(reg, dev->mac_addr);
299	if (d == NULL) {
300		d = os_zalloc(sizeof(*d));
301		if (d == NULL)
302			return -1;
303		d->next = reg->devices;
304		reg->devices = d;
305	}
306
307	wps_device_clone_data(&d->dev, dev);
308	os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
309
310	return 0;
311}
312
313
314static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
315					  const u8 *addr, const u8 *uuid_e)
316{
317	struct wps_pbc_session *pbc, *prev = NULL;
318	struct os_reltime now;
319
320	os_get_reltime(&now);
321
322	pbc = reg->pbc_sessions;
323	while (pbc) {
324		if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
325		    os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
326			if (prev)
327				prev->next = pbc->next;
328			else
329				reg->pbc_sessions = pbc->next;
330			break;
331		}
332		prev = pbc;
333		pbc = pbc->next;
334	}
335
336	if (!pbc) {
337		pbc = os_zalloc(sizeof(*pbc));
338		if (pbc == NULL)
339			return;
340		os_memcpy(pbc->addr, addr, ETH_ALEN);
341		if (uuid_e)
342			os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
343	}
344
345	pbc->next = reg->pbc_sessions;
346	reg->pbc_sessions = pbc;
347	pbc->timestamp = now;
348
349	/* remove entries that have timed out */
350	prev = pbc;
351	pbc = pbc->next;
352
353	while (pbc) {
354		if (os_reltime_expired(&now, &pbc->timestamp,
355				       WPS_PBC_WALK_TIME)) {
356			prev->next = NULL;
357			wps_free_pbc_sessions(pbc);
358			break;
359		}
360		prev = pbc;
361		pbc = pbc->next;
362	}
363}
364
365
366static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
367					     const u8 *uuid_e,
368					     const u8 *p2p_dev_addr)
369{
370	struct wps_pbc_session *pbc, *prev = NULL, *tmp;
371
372	pbc = reg->pbc_sessions;
373	while (pbc) {
374		if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
375		    (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
376		     os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
377		     0)) {
378			if (prev)
379				prev->next = pbc->next;
380			else
381				reg->pbc_sessions = pbc->next;
382			tmp = pbc;
383			pbc = pbc->next;
384			wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
385				   "addr=" MACSTR, MAC2STR(tmp->addr));
386			wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
387				    tmp->uuid_e, WPS_UUID_LEN);
388			os_free(tmp);
389			continue;
390		}
391		prev = pbc;
392		pbc = pbc->next;
393	}
394}
395
396
397int wps_registrar_pbc_overlap(struct wps_registrar *reg,
398			      const u8 *addr, const u8 *uuid_e)
399{
400	int count = 0;
401	struct wps_pbc_session *pbc;
402	struct wps_pbc_session *first = NULL;
403	struct os_reltime now;
404
405	os_get_reltime(&now);
406
407	wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
408
409	if (uuid_e) {
410		wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
411		wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
412			    uuid_e, WPS_UUID_LEN);
413		count++;
414	}
415
416	for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
417		wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
418			   MAC2STR(pbc->addr));
419		wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
420			    pbc->uuid_e, WPS_UUID_LEN);
421		if (os_reltime_expired(&now, &pbc->timestamp,
422				       WPS_PBC_WALK_TIME)) {
423			wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
424			break;
425		}
426		if (first &&
427		    os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
428			wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
429			continue; /* same Enrollee */
430		}
431		if (uuid_e == NULL ||
432		    os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
433			wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
434			count++;
435		}
436		if (first == NULL)
437			first = pbc;
438	}
439
440	wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
441
442	return count > 1 ? 1 : 0;
443}
444
445
446static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
447{
448	wpa_printf(MSG_DEBUG, "WPS:  * Wi-Fi Protected Setup State (%d)",
449		   wps->wps_state);
450	wpabuf_put_be16(msg, ATTR_WPS_STATE);
451	wpabuf_put_be16(msg, 1);
452	wpabuf_put_u8(msg, wps->wps_state);
453	return 0;
454}
455
456
457#ifdef CONFIG_WPS_UPNP
458static void wps_registrar_free_pending_m2(struct wps_context *wps)
459{
460	struct upnp_pending_message *p, *p2, *prev = NULL;
461	p = wps->upnp_msgs;
462	while (p) {
463		if (p->type == WPS_M2 || p->type == WPS_M2D) {
464			if (prev == NULL)
465				wps->upnp_msgs = p->next;
466			else
467				prev->next = p->next;
468			wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
469			p2 = p;
470			p = p->next;
471			wpabuf_free(p2->msg);
472			os_free(p2);
473			continue;
474		}
475		prev = p;
476		p = p->next;
477	}
478}
479#endif /* CONFIG_WPS_UPNP */
480
481
482static int wps_build_ap_setup_locked(struct wps_context *wps,
483				     struct wpabuf *msg)
484{
485	if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
486		wpa_printf(MSG_DEBUG, "WPS:  * AP Setup Locked");
487		wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
488		wpabuf_put_be16(msg, 1);
489		wpabuf_put_u8(msg, 1);
490	}
491	return 0;
492}
493
494
495static int wps_build_selected_registrar(struct wps_registrar *reg,
496					struct wpabuf *msg)
497{
498	if (!reg->sel_reg_union)
499		return 0;
500	wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar");
501	wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
502	wpabuf_put_be16(msg, 1);
503	wpabuf_put_u8(msg, 1);
504	return 0;
505}
506
507
508static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
509					     struct wpabuf *msg)
510{
511	u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
512	if (!reg->sel_reg_union)
513		return 0;
514	if (reg->sel_reg_dev_password_id_override >= 0)
515		id = reg->sel_reg_dev_password_id_override;
516	wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
517	wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
518	wpabuf_put_be16(msg, 2);
519	wpabuf_put_be16(msg, id);
520	return 0;
521}
522
523
524static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
525					struct wpabuf *msg)
526{
527	u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
528	if (!reg->sel_reg_union)
529		return 0;
530	if (reg->sel_reg_dev_password_id_override >= 0)
531		id = reg->sel_reg_dev_password_id_override;
532	if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
533		return 0;
534	return wps_build_uuid_e(msg, reg->wps->uuid);
535}
536
537
538static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
539{
540	*methods |= WPS_CONFIG_PUSHBUTTON;
541	if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
542	    WPS_CONFIG_VIRT_PUSHBUTTON)
543		*methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
544	if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
545	    WPS_CONFIG_PHY_PUSHBUTTON)
546		*methods |= WPS_CONFIG_PHY_PUSHBUTTON;
547	if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
548	    WPS_CONFIG_VIRT_PUSHBUTTON &&
549	    (*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		*methods |= WPS_CONFIG_PHY_PUSHBUTTON;
557	}
558}
559
560
561static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
562					    struct wpabuf *msg)
563{
564	u16 methods;
565	if (!reg->sel_reg_union)
566		return 0;
567	methods = reg->wps->config_methods;
568	methods &= ~WPS_CONFIG_PUSHBUTTON;
569	methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
570		     WPS_CONFIG_PHY_PUSHBUTTON);
571	if (reg->pbc)
572		wps_set_pushbutton(&methods, reg->wps->config_methods);
573	if (reg->sel_reg_config_methods_override >= 0)
574		methods = reg->sel_reg_config_methods_override;
575	wpa_printf(MSG_DEBUG, "WPS:  * Selected Registrar Config Methods (%x)",
576		   methods);
577	wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
578	wpabuf_put_be16(msg, 2);
579	wpabuf_put_be16(msg, methods);
580	return 0;
581}
582
583
584static 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	methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
593	methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
594		     WPS_CONFIG_PHY_PUSHBUTTON);
595	wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
596	wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
597	wpabuf_put_be16(msg, 2);
598	wpabuf_put_be16(msg, methods);
599	return 0;
600}
601
602
603static int wps_build_config_methods_r(struct wps_registrar *reg,
604				      struct wpabuf *msg)
605{
606	return wps_build_config_methods(msg, reg->wps->config_methods);
607}
608
609
610const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
611{
612	*count = 0;
613
614	while (*count < WPS_MAX_AUTHORIZED_MACS) {
615		if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
616			break;
617		(*count)++;
618	}
619
620	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 */
636struct wps_registrar *
637wps_registrar_init(struct wps_context *wps,
638		   const struct wps_registrar_config *cfg)
639{
640	struct wps_registrar *reg = os_zalloc(sizeof(*reg));
641	if (reg == NULL)
642		return NULL;
643
644	dl_list_init(&reg->pins);
645	dl_list_init(&reg->nfc_pw_tokens);
646	reg->wps = wps;
647	reg->new_psk_cb = cfg->new_psk_cb;
648	reg->set_ie_cb = cfg->set_ie_cb;
649	reg->pin_needed_cb = cfg->pin_needed_cb;
650	reg->reg_success_cb = cfg->reg_success_cb;
651	reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
652	reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
653	reg->cb_ctx = cfg->cb_ctx;
654	reg->skip_cred_build = cfg->skip_cred_build;
655	if (cfg->extra_cred) {
656		reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
657						    cfg->extra_cred_len);
658		if (reg->extra_cred == NULL) {
659			os_free(reg);
660			return NULL;
661		}
662	}
663	reg->disable_auto_conf = cfg->disable_auto_conf;
664	reg->sel_reg_dev_password_id_override = -1;
665	reg->sel_reg_config_methods_override = -1;
666	reg->static_wep_only = cfg->static_wep_only;
667	reg->dualband = cfg->dualband;
668	reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
669
670	if (wps_set_ie(reg)) {
671		wps_registrar_deinit(reg);
672		return NULL;
673	}
674
675	return reg;
676}
677
678
679void wps_registrar_flush(struct wps_registrar *reg)
680{
681	if (reg == NULL)
682		return;
683	wps_free_pins(&reg->pins);
684	wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, 0);
685	wps_free_pbc_sessions(reg->pbc_sessions);
686	reg->pbc_sessions = NULL;
687	wps_free_devices(reg->devices);
688	reg->devices = NULL;
689#ifdef WPS_WORKAROUNDS
690	reg->pbc_ignore_start.sec = 0;
691#endif /* WPS_WORKAROUNDS */
692}
693
694
695/**
696 * wps_registrar_deinit - Deinitialize WPS Registrar data
697 * @reg: Registrar data from wps_registrar_init()
698 */
699void wps_registrar_deinit(struct wps_registrar *reg)
700{
701	if (reg == NULL)
702		return;
703	eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
704	eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
705	wps_registrar_flush(reg);
706	wpabuf_clear_free(reg->extra_cred);
707	os_free(reg);
708}
709
710
711static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
712{
713	struct wps_uuid_pin *pin;
714
715	dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
716		if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
717			wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
718				   "configured wildcard PIN");
719			wps_registrar_remove_pin(reg, pin);
720			break;
721		}
722	}
723}
724
725
726/**
727 * wps_registrar_add_pin - Configure a new PIN for Registrar
728 * @reg: Registrar data from wps_registrar_init()
729 * @addr: Enrollee MAC address or %NULL if not known
730 * @uuid: UUID-E or %NULL for wildcard (any UUID)
731 * @pin: PIN (Device Password)
732 * @pin_len: Length of pin in octets
733 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
734 * Returns: 0 on success, -1 on failure
735 */
736int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
737			  const u8 *uuid, const u8 *pin, size_t pin_len,
738			  int timeout)
739{
740	struct wps_uuid_pin *p;
741
742	p = os_zalloc(sizeof(*p));
743	if (p == NULL)
744		return -1;
745	if (addr)
746		os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
747	if (uuid == NULL)
748		p->wildcard_uuid = 1;
749	else
750		os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
751	p->pin = os_memdup(pin, pin_len);
752	if (p->pin == NULL) {
753		os_free(p);
754		return -1;
755	}
756	p->pin_len = pin_len;
757
758	if (timeout) {
759		p->flags |= PIN_EXPIRES;
760		os_get_reltime(&p->expiration);
761		p->expiration.sec += timeout;
762	}
763
764	if (p->wildcard_uuid)
765		wps_registrar_invalidate_unused(reg);
766
767	dl_list_add(&reg->pins, &p->list);
768
769	wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
770		   timeout);
771	wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
772	wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
773	reg->selected_registrar = 1;
774	reg->pbc = 0;
775	if (addr)
776		wps_registrar_add_authorized_mac(reg, addr);
777	else
778		wps_registrar_add_authorized_mac(
779			reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
780	wps_registrar_selected_registrar_changed(reg, 0);
781	eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
782	eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
783			       wps_registrar_set_selected_timeout,
784			       reg, NULL);
785
786	return 0;
787}
788
789
790static void wps_registrar_remove_pin(struct wps_registrar *reg,
791				     struct wps_uuid_pin *pin)
792{
793	u8 *addr;
794	u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
795
796	if (is_zero_ether_addr(pin->enrollee_addr))
797		addr = bcast;
798	else
799		addr = pin->enrollee_addr;
800	wps_registrar_remove_authorized_mac(reg, addr);
801	wps_remove_pin(pin);
802	wps_registrar_selected_registrar_changed(reg, 0);
803}
804
805
806static void wps_registrar_expire_pins(struct wps_registrar *reg)
807{
808	struct wps_uuid_pin *pin, *prev;
809	struct os_reltime now;
810
811	os_get_reltime(&now);
812	dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
813	{
814		if ((pin->flags & PIN_EXPIRES) &&
815		    os_reltime_before(&pin->expiration, &now)) {
816			wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
817				    pin->uuid, WPS_UUID_LEN);
818			wps_registrar_remove_pin(reg, pin);
819		}
820	}
821}
822
823
824/**
825 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
826 * @reg: Registrar data from wps_registrar_init()
827 * @dev_pw: PIN to search for or %NULL to match any
828 * @dev_pw_len: Length of dev_pw in octets
829 * Returns: 0 on success, -1 if not wildcard PIN is enabled
830 */
831static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
832						 const u8 *dev_pw,
833						 size_t dev_pw_len)
834{
835	struct wps_uuid_pin *pin, *prev;
836
837	dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
838	{
839		if (dev_pw && pin->pin &&
840		    (dev_pw_len != pin->pin_len ||
841		     os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0))
842			continue; /* different PIN */
843		if (pin->wildcard_uuid) {
844			wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
845				    pin->uuid, WPS_UUID_LEN);
846			wps_registrar_remove_pin(reg, pin);
847			return 0;
848		}
849	}
850
851	return -1;
852}
853
854
855/**
856 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
857 * @reg: Registrar data from wps_registrar_init()
858 * @uuid: UUID-E
859 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
860 */
861int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
862{
863	struct wps_uuid_pin *pin, *prev;
864
865	dl_list_for_each_safe(pin, prev, &reg->pins, struct wps_uuid_pin, list)
866	{
867		if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
868			wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
869				    pin->uuid, WPS_UUID_LEN);
870			wps_registrar_remove_pin(reg, pin);
871			return 0;
872		}
873	}
874
875	return -1;
876}
877
878
879static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
880					const u8 *uuid, size_t *pin_len)
881{
882	struct wps_uuid_pin *pin, *found = NULL;
883	int wildcard = 0;
884
885	wps_registrar_expire_pins(reg);
886
887	dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
888		if (!pin->wildcard_uuid &&
889		    os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
890			found = pin;
891			break;
892		}
893	}
894
895	if (!found) {
896		/* Check for wildcard UUIDs since none of the UUID-specific
897		 * PINs matched */
898		dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
899			if (pin->wildcard_uuid == 1 ||
900			    pin->wildcard_uuid == 2) {
901				wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
902					   "PIN. Assigned it for this UUID-E");
903				wildcard = 1;
904				os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
905				found = pin;
906				break;
907			}
908		}
909	}
910
911	if (!found)
912		return NULL;
913
914	/*
915	 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
916	 * that could otherwise avoid PIN invalidations.
917	 */
918	if (found->flags & PIN_LOCKED) {
919		wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
920			   "allow concurrent re-use");
921		return NULL;
922	}
923	*pin_len = found->pin_len;
924	found->flags |= PIN_LOCKED;
925	if (wildcard)
926		found->wildcard_uuid++;
927	return found->pin;
928}
929
930
931/**
932 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
933 * @reg: Registrar data from wps_registrar_init()
934 * @uuid: UUID-E
935 * Returns: 0 on success, -1 on failure
936 *
937 * PINs are locked to enforce only one concurrent use. This function unlocks a
938 * PIN to allow it to be used again. If the specified PIN was configured using
939 * a wildcard UUID, it will be removed instead of allowing multiple uses.
940 */
941int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
942{
943	struct wps_uuid_pin *pin;
944
945	dl_list_for_each(pin, &reg->pins, struct wps_uuid_pin, list) {
946		if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
947			if (pin->wildcard_uuid == 3) {
948				wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
949					   "wildcard PIN");
950				return wps_registrar_invalidate_pin(reg, uuid);
951			}
952			pin->flags &= ~PIN_LOCKED;
953			return 0;
954		}
955	}
956
957	return -1;
958}
959
960
961static void wps_registrar_stop_pbc(struct wps_registrar *reg)
962{
963	reg->selected_registrar = 0;
964	reg->pbc = 0;
965	os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
966	wps_registrar_remove_authorized_mac(reg,
967					    (u8 *) "\xff\xff\xff\xff\xff\xff");
968	wps_registrar_selected_registrar_changed(reg, 0);
969}
970
971
972static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
973{
974	struct wps_registrar *reg = eloop_ctx;
975
976	wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
977	wps_pbc_timeout_event(reg->wps);
978	wps_registrar_stop_pbc(reg);
979}
980
981
982/**
983 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
984 * @reg: Registrar data from wps_registrar_init()
985 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
986 *	indicates no such filtering
987 * Returns: 0 on success, -1 on failure, -2 on session overlap
988 *
989 * This function is called on an AP when a push button is pushed to activate
990 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
991 * or when a PBC registration is completed. If more than one Enrollee in active
992 * PBC mode has been detected during the monitor time (previous 2 minutes), the
993 * PBC mode is not activated and -2 is returned to indicate session overlap.
994 * This is skipped if a specific Enrollee is selected.
995 */
996int wps_registrar_button_pushed(struct wps_registrar *reg,
997				const u8 *p2p_dev_addr)
998{
999	if (p2p_dev_addr == NULL &&
1000	    wps_registrar_pbc_overlap(reg, NULL, NULL)) {
1001		wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
1002			   "mode");
1003		wps_pbc_overlap_event(reg->wps);
1004		return -2;
1005	}
1006	wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
1007	reg->force_pbc_overlap = 0;
1008	reg->selected_registrar = 1;
1009	reg->pbc = 1;
1010	if (p2p_dev_addr)
1011		os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1012	else
1013		os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1014	wps_registrar_add_authorized_mac(reg,
1015					 (u8 *) "\xff\xff\xff\xff\xff\xff");
1016	wps_registrar_selected_registrar_changed(reg, 0);
1017
1018	wps_pbc_active_event(reg->wps);
1019	eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1020	eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1021	eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1022			       reg, NULL);
1023	return 0;
1024}
1025
1026
1027static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1028{
1029	wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1030	eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1031	wps_registrar_stop_pbc(reg);
1032	wps_pbc_disable_event(reg->wps);
1033}
1034
1035
1036static void wps_registrar_pin_completed(struct wps_registrar *reg)
1037{
1038	wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1039	eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1040	reg->selected_registrar = 0;
1041	wps_registrar_selected_registrar_changed(reg, 0);
1042}
1043
1044
1045void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1046			    const u8 *dev_pw, size_t dev_pw_len)
1047{
1048	if (registrar->pbc) {
1049		wps_registrar_remove_pbc_session(registrar,
1050						 uuid_e, NULL);
1051		wps_registrar_pbc_completed(registrar);
1052#ifdef WPS_WORKAROUNDS
1053		os_get_reltime(&registrar->pbc_ignore_start);
1054#endif /* WPS_WORKAROUNDS */
1055		os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1056	} else {
1057		wps_registrar_pin_completed(registrar);
1058	}
1059
1060	if (dev_pw &&
1061	    wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1062						  dev_pw_len) == 0) {
1063		wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1064				dev_pw, dev_pw_len);
1065	}
1066}
1067
1068
1069int wps_registrar_wps_cancel(struct wps_registrar *reg)
1070{
1071	if (reg->pbc) {
1072		wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1073		wps_registrar_pbc_timeout(reg, NULL);
1074		eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1075		return 1;
1076	} else if (reg->selected_registrar) {
1077		/* PIN Method */
1078		wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1079		wps_registrar_pin_completed(reg);
1080		wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1081		return 1;
1082	}
1083	return 0;
1084}
1085
1086
1087/**
1088 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1089 * @reg: Registrar data from wps_registrar_init()
1090 * @addr: MAC address of the Probe Request sender
1091 * @wps_data: WPS IE contents
1092 *
1093 * This function is called on an AP when a Probe Request with WPS IE is
1094 * received. This is used to track PBC mode use and to detect possible overlap
1095 * situation with other WPS APs.
1096 */
1097void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1098				const struct wpabuf *wps_data,
1099				int p2p_wildcard)
1100{
1101	struct wps_parse_attr attr;
1102	int skip_add = 0;
1103
1104	wpa_hexdump_buf(MSG_MSGDUMP,
1105			"WPS: Probe Request with WPS data received",
1106			wps_data);
1107
1108	if (wps_parse_msg(wps_data, &attr) < 0)
1109		return;
1110
1111	if (attr.config_methods == NULL) {
1112		wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1113			   "Probe Request");
1114		return;
1115	}
1116
1117	if (attr.dev_password_id == NULL) {
1118		wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1119			   "in Probe Request");
1120		return;
1121	}
1122
1123	if (reg->enrollee_seen_cb && attr.uuid_e &&
1124	    attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1125		char *dev_name = NULL;
1126		if (attr.dev_name) {
1127			dev_name = os_zalloc(attr.dev_name_len + 1);
1128			if (dev_name) {
1129				os_memcpy(dev_name, attr.dev_name,
1130					  attr.dev_name_len);
1131			}
1132		}
1133		reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1134				      attr.primary_dev_type,
1135				      WPA_GET_BE16(attr.config_methods),
1136				      WPA_GET_BE16(attr.dev_password_id),
1137				      *attr.request_type, dev_name);
1138		os_free(dev_name);
1139	}
1140
1141	if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1142		return; /* Not PBC */
1143
1144	wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1145		   MACSTR, MAC2STR(addr));
1146	if (attr.uuid_e == NULL) {
1147		wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1148			   "UUID-E included");
1149		return;
1150	}
1151	wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1152		    WPS_UUID_LEN);
1153
1154#ifdef WPS_WORKAROUNDS
1155	if (reg->pbc_ignore_start.sec &&
1156	    os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1157		struct os_reltime now, dur;
1158		os_get_reltime(&now);
1159		os_reltime_sub(&now, &reg->pbc_ignore_start, &dur);
1160		if (dur.sec >= 0 && dur.sec < 5) {
1161			wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1162				   "based on Probe Request from the Enrollee "
1163				   "that just completed PBC provisioning");
1164			skip_add = 1;
1165		} else
1166			reg->pbc_ignore_start.sec = 0;
1167	}
1168#endif /* WPS_WORKAROUNDS */
1169
1170	if (!skip_add)
1171		wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1172	if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1173		wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1174		reg->force_pbc_overlap = 1;
1175		wps_pbc_overlap_event(reg->wps);
1176	}
1177}
1178
1179
1180int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1181		   const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1182{
1183	if (reg->new_psk_cb == NULL)
1184		return 0;
1185
1186	return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1187			       psk_len);
1188}
1189
1190
1191static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1192			      const struct wps_device_data *dev)
1193{
1194	if (reg->pin_needed_cb == NULL)
1195		return;
1196
1197	reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1198}
1199
1200
1201static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1202			       const u8 *uuid_e, const u8 *dev_pw,
1203			       size_t dev_pw_len)
1204{
1205	if (reg->reg_success_cb == NULL)
1206		return;
1207
1208	reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1209}
1210
1211
1212static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1213			 struct wpabuf *probe_resp_ie)
1214{
1215	return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1216}
1217
1218
1219static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1220{
1221	u16 methods = 0;
1222	if (reg->set_sel_reg_cb == NULL)
1223		return;
1224
1225	if (reg->selected_registrar) {
1226		methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1227		methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1228			     WPS_CONFIG_PHY_PUSHBUTTON);
1229		if (reg->pbc)
1230			wps_set_pushbutton(&methods, reg->wps->config_methods);
1231	}
1232
1233	wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1234		   "config_methods=0x%x pbc=%d methods=0x%x",
1235		   reg->selected_registrar, reg->wps->config_methods,
1236		   reg->pbc, methods);
1237
1238	reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1239			    reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1240			    methods);
1241}
1242
1243
1244static int wps_set_ie(struct wps_registrar *reg)
1245{
1246	struct wpabuf *beacon;
1247	struct wpabuf *probe;
1248	const u8 *auth_macs;
1249	size_t count;
1250	size_t vendor_len = 0;
1251	int i;
1252
1253	if (reg->set_ie_cb == NULL)
1254		return 0;
1255
1256	for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1257		if (reg->wps->dev.vendor_ext[i]) {
1258			vendor_len += 2 + 2;
1259			vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1260		}
1261	}
1262
1263	beacon = wpabuf_alloc(400 + vendor_len);
1264	if (beacon == NULL)
1265		return -1;
1266	probe = wpabuf_alloc(500 + vendor_len);
1267	if (probe == NULL) {
1268		wpabuf_free(beacon);
1269		return -1;
1270	}
1271
1272	auth_macs = wps_authorized_macs(reg, &count);
1273
1274	wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1275
1276	if (wps_build_version(beacon) ||
1277	    wps_build_wps_state(reg->wps, beacon) ||
1278	    wps_build_ap_setup_locked(reg->wps, beacon) ||
1279	    wps_build_selected_registrar(reg, beacon) ||
1280	    wps_build_sel_reg_dev_password_id(reg, beacon) ||
1281	    wps_build_sel_reg_config_methods(reg, beacon) ||
1282	    wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1283	    (reg->dualband && wps_build_rf_bands(&reg->wps->dev, beacon, 0)) ||
1284	    wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1285	    wps_build_vendor_ext(&reg->wps->dev, beacon)) {
1286		wpabuf_free(beacon);
1287		wpabuf_free(probe);
1288		return -1;
1289	}
1290
1291#ifdef CONFIG_P2P
1292	if (wps_build_dev_name(&reg->wps->dev, beacon) ||
1293	    wps_build_primary_dev_type(&reg->wps->dev, beacon)) {
1294		wpabuf_free(beacon);
1295		wpabuf_free(probe);
1296		return -1;
1297	}
1298#endif /* CONFIG_P2P */
1299
1300	wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1301
1302	if (wps_build_version(probe) ||
1303	    wps_build_wps_state(reg->wps, probe) ||
1304	    wps_build_ap_setup_locked(reg->wps, probe) ||
1305	    wps_build_selected_registrar(reg, probe) ||
1306	    wps_build_sel_reg_dev_password_id(reg, probe) ||
1307	    wps_build_sel_reg_config_methods(reg, probe) ||
1308	    wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1309				WPS_RESP_REGISTRAR) ||
1310	    wps_build_uuid_e(probe, reg->wps->uuid) ||
1311	    wps_build_device_attrs(&reg->wps->dev, probe) ||
1312	    wps_build_probe_config_methods(reg, probe) ||
1313	    (reg->dualband && wps_build_rf_bands(&reg->wps->dev, probe, 0)) ||
1314	    wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1315	    wps_build_vendor_ext(&reg->wps->dev, probe)) {
1316		wpabuf_free(beacon);
1317		wpabuf_free(probe);
1318		return -1;
1319	}
1320
1321	beacon = wps_ie_encapsulate(beacon);
1322	probe = wps_ie_encapsulate(probe);
1323
1324	if (!beacon || !probe) {
1325		wpabuf_free(beacon);
1326		wpabuf_free(probe);
1327		return -1;
1328	}
1329
1330	if (reg->static_wep_only) {
1331		/*
1332		 * Windows XP and Vista clients can get confused about
1333		 * EAP-Identity/Request when they probe the network with
1334		 * EAPOL-Start. In such a case, they may assume the network is
1335		 * using IEEE 802.1X and prompt user for a certificate while
1336		 * the correct (non-WPS) behavior would be to ask for the
1337		 * static WEP key. As a workaround, use Microsoft Provisioning
1338		 * IE to advertise that legacy 802.1X is not supported.
1339		 */
1340		const u8 ms_wps[7] = {
1341			WLAN_EID_VENDOR_SPECIFIC, 5,
1342			/* Microsoft Provisioning IE (00:50:f2:5) */
1343			0x00, 0x50, 0xf2, 5,
1344			0x00 /* no legacy 802.1X or MS WPS */
1345		};
1346		wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1347			   "into Beacon/Probe Response frames");
1348		wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1349		wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1350	}
1351
1352	return wps_cb_set_ie(reg, beacon, probe);
1353}
1354
1355
1356static int wps_get_dev_password(struct wps_data *wps)
1357{
1358	const u8 *pin;
1359	size_t pin_len = 0;
1360
1361	bin_clear_free(wps->dev_password, wps->dev_password_len);
1362	wps->dev_password = NULL;
1363
1364	if (wps->pbc) {
1365		wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1366		pin = (const u8 *) "00000000";
1367		pin_len = 8;
1368#ifdef CONFIG_WPS_NFC
1369	} else if (wps->nfc_pw_token) {
1370		if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1371		{
1372			wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1373				   "handover and abbreviated WPS handshake "
1374				   "without Device Password");
1375			return 0;
1376		}
1377		wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1378			   "Password Token");
1379		pin = wps->nfc_pw_token->dev_pw;
1380		pin_len = wps->nfc_pw_token->dev_pw_len;
1381	} else if (wps->dev_pw_id >= 0x10 &&
1382		   wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1383		   wps->wps->ap_nfc_dev_pw) {
1384		wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1385		pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1386		pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1387#endif /* CONFIG_WPS_NFC */
1388	} else {
1389		pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1390					    &pin_len);
1391		if (pin && wps->dev_pw_id >= 0x10) {
1392			wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1393				   "Password ID, but PIN found");
1394			/*
1395			 * See whether Enrollee is willing to use PIN instead.
1396			 */
1397			wps->dev_pw_id = DEV_PW_DEFAULT;
1398		}
1399	}
1400	if (pin == NULL) {
1401		wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1402			   "the Enrollee (context %p registrar %p)",
1403			   wps->wps, wps->wps->registrar);
1404		wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1405				  &wps->peer_dev);
1406		return -1;
1407	}
1408
1409	wps->dev_password = os_memdup(pin, pin_len);
1410	if (wps->dev_password == NULL)
1411		return -1;
1412	wps->dev_password_len = pin_len;
1413
1414	return 0;
1415}
1416
1417
1418static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1419{
1420	wpa_printf(MSG_DEBUG, "WPS:  * UUID-R");
1421	wpabuf_put_be16(msg, ATTR_UUID_R);
1422	wpabuf_put_be16(msg, WPS_UUID_LEN);
1423	wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1424	return 0;
1425}
1426
1427
1428static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1429{
1430	u8 *hash;
1431	const u8 *addr[4];
1432	size_t len[4];
1433
1434	if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1435		return -1;
1436	wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1437	wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1438		    wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1439
1440	if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1441		wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1442			   "R-Hash derivation");
1443		return -1;
1444	}
1445
1446	wpa_printf(MSG_DEBUG, "WPS:  * R-Hash1");
1447	wpabuf_put_be16(msg, ATTR_R_HASH1);
1448	wpabuf_put_be16(msg, SHA256_MAC_LEN);
1449	hash = wpabuf_put(msg, SHA256_MAC_LEN);
1450	/* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1451	addr[0] = wps->snonce;
1452	len[0] = WPS_SECRET_NONCE_LEN;
1453	addr[1] = wps->psk1;
1454	len[1] = WPS_PSK_LEN;
1455	addr[2] = wpabuf_head(wps->dh_pubkey_e);
1456	len[2] = wpabuf_len(wps->dh_pubkey_e);
1457	addr[3] = wpabuf_head(wps->dh_pubkey_r);
1458	len[3] = wpabuf_len(wps->dh_pubkey_r);
1459	hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1460	wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1461
1462	wpa_printf(MSG_DEBUG, "WPS:  * R-Hash2");
1463	wpabuf_put_be16(msg, ATTR_R_HASH2);
1464	wpabuf_put_be16(msg, SHA256_MAC_LEN);
1465	hash = wpabuf_put(msg, SHA256_MAC_LEN);
1466	/* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1467	addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1468	addr[1] = wps->psk2;
1469	hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1470	wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1471
1472	return 0;
1473}
1474
1475
1476static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1477{
1478	wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce1");
1479	wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1480	wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1481	wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1482	return 0;
1483}
1484
1485
1486static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1487{
1488	wpa_printf(MSG_DEBUG, "WPS:  * R-SNonce2");
1489	wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1490	wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1491	wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1492			WPS_SECRET_NONCE_LEN);
1493	return 0;
1494}
1495
1496
1497static int wps_build_cred_network_idx(struct wpabuf *msg,
1498				      const struct wps_credential *cred)
1499{
1500	wpa_printf(MSG_DEBUG, "WPS:  * Network Index (1)");
1501	wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1502	wpabuf_put_be16(msg, 1);
1503	wpabuf_put_u8(msg, 1);
1504	return 0;
1505}
1506
1507
1508static int wps_build_cred_ssid(struct wpabuf *msg,
1509			       const struct wps_credential *cred)
1510{
1511	wpa_printf(MSG_DEBUG, "WPS:  * SSID");
1512	wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1513			  cred->ssid, cred->ssid_len);
1514	wpabuf_put_be16(msg, ATTR_SSID);
1515	wpabuf_put_be16(msg, cred->ssid_len);
1516	wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1517	return 0;
1518}
1519
1520
1521static int wps_build_cred_auth_type(struct wpabuf *msg,
1522				    const struct wps_credential *cred)
1523{
1524	wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type (0x%x)",
1525		   cred->auth_type);
1526	wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1527	wpabuf_put_be16(msg, 2);
1528	wpabuf_put_be16(msg, cred->auth_type);
1529	return 0;
1530}
1531
1532
1533static int wps_build_cred_encr_type(struct wpabuf *msg,
1534				    const struct wps_credential *cred)
1535{
1536	wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type (0x%x)",
1537		   cred->encr_type);
1538	wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1539	wpabuf_put_be16(msg, 2);
1540	wpabuf_put_be16(msg, cred->encr_type);
1541	return 0;
1542}
1543
1544
1545static int wps_build_cred_network_key(struct wpabuf *msg,
1546				      const struct wps_credential *cred)
1547{
1548	wpa_printf(MSG_DEBUG, "WPS:  * Network Key (len=%d)",
1549		   (int) cred->key_len);
1550	wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1551			cred->key, cred->key_len);
1552	wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1553	wpabuf_put_be16(msg, cred->key_len);
1554	wpabuf_put_data(msg, cred->key, cred->key_len);
1555	return 0;
1556}
1557
1558
1559static int wps_build_credential(struct wpabuf *msg,
1560				const struct wps_credential *cred)
1561{
1562	if (wps_build_cred_network_idx(msg, cred) ||
1563	    wps_build_cred_ssid(msg, cred) ||
1564	    wps_build_cred_auth_type(msg, cred) ||
1565	    wps_build_cred_encr_type(msg, cred) ||
1566	    wps_build_cred_network_key(msg, cred) ||
1567	    wps_build_mac_addr(msg, cred->mac_addr))
1568		return -1;
1569	return 0;
1570}
1571
1572
1573int wps_build_credential_wrap(struct wpabuf *msg,
1574			      const struct wps_credential *cred)
1575{
1576	struct wpabuf *wbuf;
1577	wbuf = wpabuf_alloc(200);
1578	if (wbuf == NULL)
1579		return -1;
1580	if (wps_build_credential(wbuf, cred)) {
1581		wpabuf_clear_free(wbuf);
1582		return -1;
1583	}
1584	wpabuf_put_be16(msg, ATTR_CRED);
1585	wpabuf_put_be16(msg, wpabuf_len(wbuf));
1586	wpabuf_put_buf(msg, wbuf);
1587	wpabuf_clear_free(wbuf);
1588	return 0;
1589}
1590
1591
1592int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1593{
1594	struct wpabuf *cred;
1595
1596	if (wps->wps->registrar->skip_cred_build)
1597		goto skip_cred_build;
1598
1599	wpa_printf(MSG_DEBUG, "WPS:  * Credential");
1600	if (wps->use_cred) {
1601		os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1602		goto use_provided;
1603	}
1604	os_memset(&wps->cred, 0, sizeof(wps->cred));
1605
1606	os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1607	wps->cred.ssid_len = wps->wps->ssid_len;
1608
1609	/* Select the best authentication and encryption type */
1610	wpa_printf(MSG_DEBUG,
1611		   "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x",
1612		   wps->wps->auth_types, wps->auth_type);
1613	if (wps->auth_type & WPS_AUTH_WPA2PSK)
1614		wps->auth_type = WPS_AUTH_WPA2PSK;
1615	else if (wps->auth_type & WPS_AUTH_WPAPSK)
1616		wps->auth_type = WPS_AUTH_WPAPSK;
1617	else if (wps->auth_type & WPS_AUTH_OPEN)
1618		wps->auth_type = WPS_AUTH_OPEN;
1619	else {
1620		wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1621			   wps->auth_type);
1622		return -1;
1623	}
1624	wps->cred.auth_type = wps->auth_type;
1625
1626	wpa_printf(MSG_DEBUG,
1627		   "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x",
1628		   wps->wps->encr_types, wps->wps->encr_types_rsn,
1629		   wps->wps->encr_types_wpa, wps->encr_type);
1630	if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK)
1631		wps->encr_type &= wps->wps->encr_types_rsn;
1632	else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK)
1633		wps->encr_type &= wps->wps->encr_types_wpa;
1634	if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1635	    wps->auth_type == WPS_AUTH_WPAPSK) {
1636		if (wps->encr_type & WPS_ENCR_AES)
1637			wps->encr_type = WPS_ENCR_AES;
1638		else if (wps->encr_type & WPS_ENCR_TKIP)
1639			wps->encr_type = WPS_ENCR_TKIP;
1640		else {
1641			wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1642				   "type for WPA/WPA2");
1643			return -1;
1644		}
1645	} else {
1646		if (wps->encr_type & WPS_ENCR_NONE)
1647			wps->encr_type = WPS_ENCR_NONE;
1648#ifdef CONFIG_TESTING_OPTIONS
1649		else if (wps->encr_type & WPS_ENCR_WEP)
1650			wps->encr_type = WPS_ENCR_WEP;
1651#endif /* CONFIG_TESTING_OPTIONS */
1652		else {
1653			wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1654				   "type for non-WPA/WPA2 mode");
1655			return -1;
1656		}
1657	}
1658	wps->cred.encr_type = wps->encr_type;
1659	/*
1660	 * Set MAC address in the Credential to be the Enrollee's MAC address
1661	 */
1662	os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1663
1664	if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1665	    !wps->wps->registrar->disable_auto_conf) {
1666		u8 r[16];
1667		/* Generate a random passphrase */
1668		if (random_pool_ready() != 1 ||
1669		    random_get_bytes(r, sizeof(r)) < 0) {
1670			wpa_printf(MSG_INFO,
1671				   "WPS: Could not generate random PSK");
1672			return -1;
1673		}
1674		os_free(wps->new_psk);
1675		wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1676		if (wps->new_psk == NULL)
1677			return -1;
1678		wps->new_psk_len--; /* remove newline */
1679		while (wps->new_psk_len &&
1680		       wps->new_psk[wps->new_psk_len - 1] == '=')
1681			wps->new_psk_len--;
1682		wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1683				      wps->new_psk, wps->new_psk_len);
1684		os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1685		wps->cred.key_len = wps->new_psk_len;
1686	} else if (!wps->wps->registrar->force_per_enrollee_psk &&
1687		   wps->use_psk_key && wps->wps->psk_set) {
1688		char hex[65];
1689		wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1690		wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1691		os_memcpy(wps->cred.key, hex, 32 * 2);
1692		wps->cred.key_len = 32 * 2;
1693	} else if (!wps->wps->registrar->force_per_enrollee_psk &&
1694		   wps->wps->network_key) {
1695		os_memcpy(wps->cred.key, wps->wps->network_key,
1696			  wps->wps->network_key_len);
1697		wps->cred.key_len = wps->wps->network_key_len;
1698	} else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1699		char hex[65];
1700		/* Generate a random per-device PSK */
1701		os_free(wps->new_psk);
1702		wps->new_psk_len = 32;
1703		wps->new_psk = os_malloc(wps->new_psk_len);
1704		if (wps->new_psk == NULL)
1705			return -1;
1706		if (random_pool_ready() != 1 ||
1707		    random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1708			wpa_printf(MSG_INFO,
1709				   "WPS: Could not generate random PSK");
1710			os_free(wps->new_psk);
1711			wps->new_psk = NULL;
1712			return -1;
1713		}
1714		wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1715				wps->new_psk, wps->new_psk_len);
1716		wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1717				 wps->new_psk_len);
1718		os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1719		wps->cred.key_len = wps->new_psk_len * 2;
1720	}
1721
1722use_provided:
1723#ifdef CONFIG_WPS_TESTING
1724	if (wps_testing_dummy_cred)
1725		cred = wpabuf_alloc(200);
1726	else
1727		cred = NULL;
1728	if (cred) {
1729		struct wps_credential dummy;
1730		wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1731		os_memset(&dummy, 0, sizeof(dummy));
1732		os_memcpy(dummy.ssid, "dummy", 5);
1733		dummy.ssid_len = 5;
1734		dummy.auth_type = WPS_AUTH_WPA2PSK;
1735		dummy.encr_type = WPS_ENCR_AES;
1736		os_memcpy(dummy.key, "dummy psk", 9);
1737		dummy.key_len = 9;
1738		os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1739		wps_build_credential(cred, &dummy);
1740		wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1741
1742		wpabuf_put_be16(msg, ATTR_CRED);
1743		wpabuf_put_be16(msg, wpabuf_len(cred));
1744		wpabuf_put_buf(msg, cred);
1745
1746		wpabuf_free(cred);
1747	}
1748#endif /* CONFIG_WPS_TESTING */
1749
1750	cred = wpabuf_alloc(200);
1751	if (cred == NULL)
1752		return -1;
1753
1754	if (wps_build_credential(cred, &wps->cred)) {
1755		wpabuf_clear_free(cred);
1756		return -1;
1757	}
1758
1759	wpabuf_put_be16(msg, ATTR_CRED);
1760	wpabuf_put_be16(msg, wpabuf_len(cred));
1761	wpabuf_put_buf(msg, cred);
1762	wpabuf_clear_free(cred);
1763
1764skip_cred_build:
1765	if (wps->wps->registrar->extra_cred) {
1766		wpa_printf(MSG_DEBUG, "WPS:  * Credential (pre-configured)");
1767		wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1768	}
1769
1770	return 0;
1771}
1772
1773
1774static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1775{
1776	wpa_printf(MSG_DEBUG, "WPS:  * AP Settings");
1777
1778	if (wps_build_credential(msg, &wps->cred))
1779		return -1;
1780
1781	return 0;
1782}
1783
1784
1785static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1786{
1787	struct wpabuf *msg, *plain;
1788
1789	msg = wpabuf_alloc(1000);
1790	if (msg == NULL)
1791		return NULL;
1792
1793	plain = wpabuf_alloc(200);
1794	if (plain == NULL) {
1795		wpabuf_free(msg);
1796		return NULL;
1797	}
1798
1799	if (wps_build_ap_settings(wps, plain)) {
1800		wpabuf_clear_free(plain);
1801		wpabuf_free(msg);
1802		return NULL;
1803	}
1804
1805	wpabuf_put_be16(msg, ATTR_CRED);
1806	wpabuf_put_be16(msg, wpabuf_len(plain));
1807	wpabuf_put_buf(msg, plain);
1808	wpabuf_clear_free(plain);
1809
1810	return msg;
1811}
1812
1813
1814static struct wpabuf * wps_build_m2(struct wps_data *wps)
1815{
1816	struct wpabuf *msg;
1817	int config_in_m2 = 0;
1818
1819	if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1820		return NULL;
1821	wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1822		    wps->nonce_r, WPS_NONCE_LEN);
1823	wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1824
1825	wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1826	msg = wpabuf_alloc(1000);
1827	if (msg == NULL)
1828		return NULL;
1829
1830	if (wps_build_version(msg) ||
1831	    wps_build_msg_type(msg, WPS_M2) ||
1832	    wps_build_enrollee_nonce(wps, msg) ||
1833	    wps_build_registrar_nonce(wps, msg) ||
1834	    wps_build_uuid_r(wps, msg) ||
1835	    wps_build_public_key(wps, msg) ||
1836	    wps_derive_keys(wps) ||
1837	    wps_build_auth_type_flags(wps, msg) ||
1838	    wps_build_encr_type_flags(wps, msg) ||
1839	    wps_build_conn_type_flags(wps, msg) ||
1840	    wps_build_config_methods_r(wps->wps->registrar, msg) ||
1841	    wps_build_device_attrs(&wps->wps->dev, msg) ||
1842	    wps_build_rf_bands(&wps->wps->dev, msg,
1843			       wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1844	    wps_build_assoc_state(wps, msg) ||
1845	    wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1846	    wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1847	    wps_build_os_version(&wps->wps->dev, msg) ||
1848	    wps_build_wfa_ext(msg, 0, NULL, 0)) {
1849		wpabuf_free(msg);
1850		return NULL;
1851	}
1852
1853#ifdef CONFIG_WPS_NFC
1854	if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1855	    wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1856		/*
1857		 * Use abbreviated handshake since public key hash allowed
1858		 * Enrollee to validate our public key similarly to how Enrollee
1859		 * public key was validated. There is no need to validate Device
1860		 * Password in this case.
1861		 */
1862		struct wpabuf *plain = wpabuf_alloc(500);
1863		if (plain == NULL ||
1864		    wps_build_cred(wps, plain) ||
1865		    wps_build_key_wrap_auth(wps, plain) ||
1866		    wps_build_encr_settings(wps, msg, plain)) {
1867			wpabuf_free(msg);
1868			wpabuf_clear_free(plain);
1869			return NULL;
1870		}
1871		wpabuf_clear_free(plain);
1872		config_in_m2 = 1;
1873	}
1874#endif /* CONFIG_WPS_NFC */
1875
1876	if (wps_build_authenticator(wps, msg)) {
1877		wpabuf_free(msg);
1878		return NULL;
1879	}
1880
1881	wps->int_reg = 1;
1882	wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1883	return msg;
1884}
1885
1886
1887static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1888{
1889	struct wpabuf *msg;
1890	u16 err = wps->config_error;
1891
1892	wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1893	msg = wpabuf_alloc(1000);
1894	if (msg == NULL)
1895		return NULL;
1896
1897	if (wps->wps->ap && wps->wps->ap_setup_locked &&
1898	    err == WPS_CFG_NO_ERROR)
1899		err = WPS_CFG_SETUP_LOCKED;
1900
1901	if (wps_build_version(msg) ||
1902	    wps_build_msg_type(msg, WPS_M2D) ||
1903	    wps_build_enrollee_nonce(wps, msg) ||
1904	    wps_build_registrar_nonce(wps, msg) ||
1905	    wps_build_uuid_r(wps, msg) ||
1906	    wps_build_auth_type_flags(wps, msg) ||
1907	    wps_build_encr_type_flags(wps, msg) ||
1908	    wps_build_conn_type_flags(wps, msg) ||
1909	    wps_build_config_methods_r(wps->wps->registrar, msg) ||
1910	    wps_build_device_attrs(&wps->wps->dev, msg) ||
1911	    wps_build_rf_bands(&wps->wps->dev, msg,
1912			       wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1913	    wps_build_assoc_state(wps, msg) ||
1914	    wps_build_config_error(msg, err) ||
1915	    wps_build_os_version(&wps->wps->dev, msg) ||
1916	    wps_build_wfa_ext(msg, 0, NULL, 0)) {
1917		wpabuf_free(msg);
1918		return NULL;
1919	}
1920
1921	wps->state = RECV_M2D_ACK;
1922	return msg;
1923}
1924
1925
1926static struct wpabuf * wps_build_m4(struct wps_data *wps)
1927{
1928	struct wpabuf *msg, *plain;
1929
1930	wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1931
1932	if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0)
1933		return NULL;
1934
1935	plain = wpabuf_alloc(200);
1936	if (plain == NULL)
1937		return NULL;
1938
1939	msg = wpabuf_alloc(1000);
1940	if (msg == NULL) {
1941		wpabuf_free(plain);
1942		return NULL;
1943	}
1944
1945	if (wps_build_version(msg) ||
1946	    wps_build_msg_type(msg, WPS_M4) ||
1947	    wps_build_enrollee_nonce(wps, msg) ||
1948	    wps_build_r_hash(wps, msg) ||
1949	    wps_build_r_snonce1(wps, plain) ||
1950	    wps_build_key_wrap_auth(wps, plain) ||
1951	    wps_build_encr_settings(wps, msg, plain) ||
1952	    wps_build_wfa_ext(msg, 0, NULL, 0) ||
1953	    wps_build_authenticator(wps, msg)) {
1954		wpabuf_clear_free(plain);
1955		wpabuf_free(msg);
1956		return NULL;
1957	}
1958	wpabuf_clear_free(plain);
1959
1960	wps->state = RECV_M5;
1961	return msg;
1962}
1963
1964
1965static struct wpabuf * wps_build_m6(struct wps_data *wps)
1966{
1967	struct wpabuf *msg, *plain;
1968
1969	wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1970
1971	plain = wpabuf_alloc(200);
1972	if (plain == NULL)
1973		return NULL;
1974
1975	msg = wpabuf_alloc(1000);
1976	if (msg == NULL) {
1977		wpabuf_free(plain);
1978		return NULL;
1979	}
1980
1981	if (wps_build_version(msg) ||
1982	    wps_build_msg_type(msg, WPS_M6) ||
1983	    wps_build_enrollee_nonce(wps, msg) ||
1984	    wps_build_r_snonce2(wps, plain) ||
1985	    wps_build_key_wrap_auth(wps, plain) ||
1986	    wps_build_encr_settings(wps, msg, plain) ||
1987	    wps_build_wfa_ext(msg, 0, NULL, 0) ||
1988	    wps_build_authenticator(wps, msg)) {
1989		wpabuf_clear_free(plain);
1990		wpabuf_free(msg);
1991		return NULL;
1992	}
1993	wpabuf_clear_free(plain);
1994
1995	wps->wps_pin_revealed = 1;
1996	wps->state = RECV_M7;
1997	return msg;
1998}
1999
2000
2001static struct wpabuf * wps_build_m8(struct wps_data *wps)
2002{
2003	struct wpabuf *msg, *plain;
2004
2005	wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
2006
2007	plain = wpabuf_alloc(500);
2008	if (plain == NULL)
2009		return NULL;
2010
2011	msg = wpabuf_alloc(1000);
2012	if (msg == NULL) {
2013		wpabuf_free(plain);
2014		return NULL;
2015	}
2016
2017	if (wps_build_version(msg) ||
2018	    wps_build_msg_type(msg, WPS_M8) ||
2019	    wps_build_enrollee_nonce(wps, msg) ||
2020	    ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
2021	    (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
2022	    wps_build_key_wrap_auth(wps, plain) ||
2023	    wps_build_encr_settings(wps, msg, plain) ||
2024	    wps_build_wfa_ext(msg, 0, NULL, 0) ||
2025	    wps_build_authenticator(wps, msg)) {
2026		wpabuf_clear_free(plain);
2027		wpabuf_clear_free(msg);
2028		return NULL;
2029	}
2030	wpabuf_clear_free(plain);
2031
2032	wps->state = RECV_DONE;
2033	return msg;
2034}
2035
2036
2037struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2038				      enum wsc_op_code *op_code)
2039{
2040	struct wpabuf *msg;
2041
2042#ifdef CONFIG_WPS_UPNP
2043	if (!wps->int_reg && wps->wps->wps_upnp) {
2044		struct upnp_pending_message *p, *prev = NULL;
2045		if (wps->ext_reg > 1)
2046			wps_registrar_free_pending_m2(wps->wps);
2047		p = wps->wps->upnp_msgs;
2048		/* TODO: check pending message MAC address */
2049		while (p && p->next) {
2050			prev = p;
2051			p = p->next;
2052		}
2053		if (p) {
2054			wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2055				   "UPnP");
2056			if (prev)
2057				prev->next = NULL;
2058			else
2059				wps->wps->upnp_msgs = NULL;
2060			msg = p->msg;
2061			switch (p->type) {
2062			case WPS_WSC_ACK:
2063				*op_code = WSC_ACK;
2064				break;
2065			case WPS_WSC_NACK:
2066				*op_code = WSC_NACK;
2067				break;
2068			default:
2069				*op_code = WSC_MSG;
2070				break;
2071			}
2072			os_free(p);
2073			if (wps->ext_reg == 0)
2074				wps->ext_reg = 1;
2075			return msg;
2076		}
2077	}
2078	if (wps->ext_reg) {
2079		wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2080			   "pending message available");
2081		return NULL;
2082	}
2083#endif /* CONFIG_WPS_UPNP */
2084
2085	switch (wps->state) {
2086	case SEND_M2:
2087		if (wps_get_dev_password(wps) < 0)
2088			msg = wps_build_m2d(wps);
2089		else
2090			msg = wps_build_m2(wps);
2091		*op_code = WSC_MSG;
2092		break;
2093	case SEND_M2D:
2094		msg = wps_build_m2d(wps);
2095		*op_code = WSC_MSG;
2096		break;
2097	case SEND_M4:
2098		msg = wps_build_m4(wps);
2099		*op_code = WSC_MSG;
2100		break;
2101	case SEND_M6:
2102		msg = wps_build_m6(wps);
2103		*op_code = WSC_MSG;
2104		break;
2105	case SEND_M8:
2106		msg = wps_build_m8(wps);
2107		*op_code = WSC_MSG;
2108		break;
2109	case RECV_DONE:
2110		msg = wps_build_wsc_ack(wps);
2111		*op_code = WSC_ACK;
2112		break;
2113	case SEND_WSC_NACK:
2114		msg = wps_build_wsc_nack(wps);
2115		*op_code = WSC_NACK;
2116		break;
2117	default:
2118		wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2119			   "a message", wps->state);
2120		msg = NULL;
2121		break;
2122	}
2123
2124	if (*op_code == WSC_MSG && msg) {
2125		/* Save a copy of the last message for Authenticator derivation
2126		 */
2127		wpabuf_free(wps->last_msg);
2128		wps->last_msg = wpabuf_dup(msg);
2129	}
2130
2131	return msg;
2132}
2133
2134
2135static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2136{
2137	if (e_nonce == NULL) {
2138		wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2139		return -1;
2140	}
2141
2142	os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2143	wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2144		    wps->nonce_e, WPS_NONCE_LEN);
2145
2146	return 0;
2147}
2148
2149
2150static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2151{
2152	if (r_nonce == NULL) {
2153		wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2154		return -1;
2155	}
2156
2157	if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2158		wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2159		return -1;
2160	}
2161
2162	return 0;
2163}
2164
2165
2166static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2167{
2168	if (uuid_e == NULL) {
2169		wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2170		return -1;
2171	}
2172
2173	os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2174	wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2175
2176	return 0;
2177}
2178
2179
2180static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2181{
2182	if (pw_id == NULL) {
2183		wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2184		return -1;
2185	}
2186
2187	wps->dev_pw_id = WPA_GET_BE16(pw_id);
2188	wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2189
2190	return 0;
2191}
2192
2193
2194static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2195{
2196	if (e_hash1 == NULL) {
2197		wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2198		return -1;
2199	}
2200
2201	os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2202	wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2203
2204	return 0;
2205}
2206
2207
2208static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2209{
2210	if (e_hash2 == NULL) {
2211		wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2212		return -1;
2213	}
2214
2215	os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2216	wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2217
2218	return 0;
2219}
2220
2221
2222static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2223{
2224	u8 hash[SHA256_MAC_LEN];
2225	const u8 *addr[4];
2226	size_t len[4];
2227
2228	if (e_snonce1 == NULL) {
2229		wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2230		return -1;
2231	}
2232
2233	wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2234			WPS_SECRET_NONCE_LEN);
2235
2236	/* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2237	addr[0] = e_snonce1;
2238	len[0] = WPS_SECRET_NONCE_LEN;
2239	addr[1] = wps->psk1;
2240	len[1] = WPS_PSK_LEN;
2241	addr[2] = wpabuf_head(wps->dh_pubkey_e);
2242	len[2] = wpabuf_len(wps->dh_pubkey_e);
2243	addr[3] = wpabuf_head(wps->dh_pubkey_r);
2244	len[3] = wpabuf_len(wps->dh_pubkey_r);
2245	hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2246
2247	if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2248		wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2249			   "not match with the pre-committed value");
2250		wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2251		wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2252		return -1;
2253	}
2254
2255	wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2256		   "half of the device password");
2257
2258	return 0;
2259}
2260
2261
2262static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2263{
2264	u8 hash[SHA256_MAC_LEN];
2265	const u8 *addr[4];
2266	size_t len[4];
2267
2268	if (e_snonce2 == NULL) {
2269		wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2270		return -1;
2271	}
2272
2273	wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2274			WPS_SECRET_NONCE_LEN);
2275
2276	/* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2277	addr[0] = e_snonce2;
2278	len[0] = WPS_SECRET_NONCE_LEN;
2279	addr[1] = wps->psk2;
2280	len[1] = WPS_PSK_LEN;
2281	addr[2] = wpabuf_head(wps->dh_pubkey_e);
2282	len[2] = wpabuf_len(wps->dh_pubkey_e);
2283	addr[3] = wpabuf_head(wps->dh_pubkey_r);
2284	len[3] = wpabuf_len(wps->dh_pubkey_r);
2285	hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2286
2287	if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2288		wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2289			   "not match with the pre-committed value");
2290		wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2291		wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2292		wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2293		return -1;
2294	}
2295
2296	wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2297		   "half of the device password");
2298	wps->wps_pin_revealed = 0;
2299	wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2300
2301	/*
2302	 * In case wildcard PIN is used and WPS handshake succeeds in the first
2303	 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2304	 * sure the PIN gets invalidated here.
2305	 */
2306	wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2307
2308	return 0;
2309}
2310
2311
2312static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2313{
2314	if (mac_addr == NULL) {
2315		wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2316		return -1;
2317	}
2318
2319	wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2320		   MAC2STR(mac_addr));
2321	os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2322	os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2323
2324	return 0;
2325}
2326
2327
2328static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2329			      size_t pk_len)
2330{
2331	if (pk == NULL || pk_len == 0) {
2332		wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2333		return -1;
2334	}
2335
2336	wpabuf_free(wps->dh_pubkey_e);
2337	wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2338	if (wps->dh_pubkey_e == NULL)
2339		return -1;
2340
2341	return 0;
2342}
2343
2344
2345static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2346{
2347	u16 auth_types;
2348
2349	if (auth == NULL) {
2350		wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2351			   "received");
2352		return -1;
2353	}
2354
2355	auth_types = WPA_GET_BE16(auth);
2356
2357	wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2358		   auth_types);
2359#ifdef WPS_WORKAROUNDS
2360	/*
2361	 * Some deployed implementations seem to advertise incorrect information
2362	 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but
2363	 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to
2364	 * avoid issues with building Credentials that do not use the strongest
2365	 * actually supported authentication option (that device does support
2366	 * WPA2PSK even when it does not claim it here).
2367	 */
2368	if ((auth_types &
2369	     (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) ==
2370	    (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) {
2371		wpa_printf(MSG_DEBUG,
2372			   "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support");
2373		auth_types |= WPS_AUTH_WPA2PSK;
2374	}
2375#endif /* WPS_WORKAROUNDS */
2376	wps->auth_type = wps->wps->auth_types & auth_types;
2377	if (wps->auth_type == 0) {
2378		wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2379			   "authentication types (own 0x%x Enrollee 0x%x)",
2380			   wps->wps->auth_types, auth_types);
2381#ifdef WPS_WORKAROUNDS
2382		/*
2383		 * Some deployed implementations seem to advertise incorrect
2384		 * information in this attribute. For example, Linksys WRT350N
2385		 * seems to have a byteorder bug that breaks this negotiation.
2386		 * In order to interoperate with existing implementations,
2387		 * assume that the Enrollee supports everything we do.
2388		 */
2389		wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2390			   "does not advertise supported authentication types "
2391			   "correctly");
2392		wps->auth_type = wps->wps->auth_types;
2393#else /* WPS_WORKAROUNDS */
2394		return -1;
2395#endif /* WPS_WORKAROUNDS */
2396	}
2397
2398	return 0;
2399}
2400
2401
2402static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2403{
2404	u16 encr_types;
2405
2406	if (encr == NULL) {
2407		wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2408			   "received");
2409		return -1;
2410	}
2411
2412	encr_types = WPA_GET_BE16(encr);
2413
2414	wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2415		   encr_types);
2416	wps->encr_type = wps->wps->encr_types & encr_types;
2417	if (wps->encr_type == 0) {
2418		wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2419			   "encryption types (own 0x%x Enrollee 0x%x)",
2420			   wps->wps->encr_types, encr_types);
2421#ifdef WPS_WORKAROUNDS
2422		/*
2423		 * Some deployed implementations seem to advertise incorrect
2424		 * information in this attribute. For example, Linksys WRT350N
2425		 * seems to have a byteorder bug that breaks this negotiation.
2426		 * In order to interoperate with existing implementations,
2427		 * assume that the Enrollee supports everything we do.
2428		 */
2429		wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2430			   "does not advertise supported encryption types "
2431			   "correctly");
2432		wps->encr_type = wps->wps->encr_types;
2433#else /* WPS_WORKAROUNDS */
2434		return -1;
2435#endif /* WPS_WORKAROUNDS */
2436	}
2437
2438	return 0;
2439}
2440
2441
2442static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2443{
2444	if (conn == NULL) {
2445		wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2446			   "received");
2447		return -1;
2448	}
2449
2450	wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2451		   *conn);
2452
2453	return 0;
2454}
2455
2456
2457static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2458{
2459	u16 m;
2460
2461	if (methods == NULL) {
2462		wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2463		return -1;
2464	}
2465
2466	m = WPA_GET_BE16(methods);
2467
2468	wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2469		   "%s%s%s%s%s%s%s%s%s", m,
2470		   m & WPS_CONFIG_USBA ? " [USBA]" : "",
2471		   m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2472		   m & WPS_CONFIG_LABEL ? " [Label]" : "",
2473		   m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2474		   m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2475		   m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2476		   m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2477		   m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2478		   m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2479
2480	if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2481		/*
2482		 * The Enrollee does not have a display so it is unlikely to be
2483		 * able to show the passphrase to a user and as such, could
2484		 * benefit from receiving PSK to reduce key derivation time.
2485		 */
2486		wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2487			   "Enrollee not supporting display");
2488		wps->use_psk_key = 1;
2489	}
2490
2491	return 0;
2492}
2493
2494
2495static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2496{
2497	if (state == NULL) {
2498		wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2499			   "received");
2500		return -1;
2501	}
2502
2503	wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2504		   *state);
2505
2506	return 0;
2507}
2508
2509
2510static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2511{
2512	u16 a;
2513
2514	if (assoc == NULL) {
2515		wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2516		return -1;
2517	}
2518
2519	a = WPA_GET_BE16(assoc);
2520	wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2521
2522	return 0;
2523}
2524
2525
2526static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2527{
2528	u16 e;
2529
2530	if (err == NULL) {
2531		wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2532		return -1;
2533	}
2534
2535	e = WPA_GET_BE16(err);
2536	wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2537
2538	return 0;
2539}
2540
2541
2542static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2543{
2544#ifdef CONFIG_P2P
2545	struct wps_registrar *reg = wps->wps->registrar;
2546
2547	if (is_zero_ether_addr(reg->p2p_dev_addr))
2548		return 1; /* no filtering in use */
2549
2550	if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2551		wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2552			   "filtering for PBC: expected " MACSTR " was "
2553			   MACSTR " - indicate PBC session overlap",
2554			   MAC2STR(reg->p2p_dev_addr),
2555			   MAC2STR(wps->p2p_dev_addr));
2556		return 0;
2557	}
2558#endif /* CONFIG_P2P */
2559	return 1;
2560}
2561
2562
2563static int wps_registrar_skip_overlap(struct wps_data *wps)
2564{
2565#ifdef CONFIG_P2P
2566	struct wps_registrar *reg = wps->wps->registrar;
2567
2568	if (is_zero_ether_addr(reg->p2p_dev_addr))
2569		return 0; /* no specific Enrollee selected */
2570
2571	if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2572		wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2573			   "Enrollee match");
2574		return 1;
2575	}
2576#endif /* CONFIG_P2P */
2577	return 0;
2578}
2579
2580
2581static enum wps_process_res wps_process_m1(struct wps_data *wps,
2582					   struct wps_parse_attr *attr)
2583{
2584	wpa_printf(MSG_DEBUG, "WPS: Received M1");
2585
2586	if (wps->state != RECV_M1) {
2587		wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2588			   "receiving M1", wps->state);
2589		return WPS_FAILURE;
2590	}
2591
2592	if (wps_process_uuid_e(wps, attr->uuid_e) ||
2593	    wps_process_mac_addr(wps, attr->mac_addr) ||
2594	    wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2595	    wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2596	    wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2597	    wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2598	    wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2599	    wps_process_config_methods(wps, attr->config_methods) ||
2600	    wps_process_wps_state(wps, attr->wps_state) ||
2601	    wps_process_device_attrs(&wps->peer_dev, attr) ||
2602	    wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2603	    wps_process_assoc_state(wps, attr->assoc_state) ||
2604	    wps_process_dev_password_id(wps, attr->dev_password_id) ||
2605	    wps_process_config_error(wps, attr->config_error) ||
2606	    wps_process_os_version(&wps->peer_dev, attr->os_version))
2607		return WPS_FAILURE;
2608
2609	if (wps->dev_pw_id < 0x10 &&
2610	    wps->dev_pw_id != DEV_PW_DEFAULT &&
2611	    wps->dev_pw_id != DEV_PW_P2PS_DEFAULT &&
2612	    wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2613	    wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2614	    wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2615#ifdef CONFIG_WPS_NFC
2616	    wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2617#endif /* CONFIG_WPS_NFC */
2618	    (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2619	     !wps->wps->registrar->pbc)) {
2620		wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2621			   wps->dev_pw_id);
2622		wps->state = SEND_M2D;
2623		return WPS_CONTINUE;
2624	}
2625
2626#ifdef CONFIG_WPS_NFC
2627	if (wps->dev_pw_id >= 0x10 ||
2628	    wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2629		struct wps_nfc_pw_token *token;
2630		const u8 *addr[1];
2631		u8 hash[WPS_HASH_LEN];
2632
2633		wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2634			   wps->dev_pw_id, wps->wps, wps->wps->registrar);
2635		token = wps_get_nfc_pw_token(
2636			&wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2637		if (token && token->peer_pk_hash_known) {
2638			size_t len;
2639
2640			wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2641				   "Password Token");
2642			dl_list_del(&token->list);
2643			wps->nfc_pw_token = token;
2644
2645			addr[0] = attr->public_key;
2646			len = attr->public_key_len;
2647			sha256_vector(1, addr, &len, hash);
2648			if (os_memcmp_const(hash,
2649					    wps->nfc_pw_token->pubkey_hash,
2650					    WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2651				wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2652					   "mismatch");
2653				wps->state = SEND_M2D;
2654				wps->config_error =
2655					WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2656				return WPS_CONTINUE;
2657			}
2658		} else if (token) {
2659			wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2660				   "Password Token (no peer PK hash)");
2661			wps->nfc_pw_token = token;
2662		} else if (wps->dev_pw_id >= 0x10 &&
2663			   wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2664			   wps->wps->ap_nfc_dev_pw) {
2665			wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2666		}
2667	}
2668#endif /* CONFIG_WPS_NFC */
2669
2670	if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2671		if ((wps->wps->registrar->force_pbc_overlap ||
2672		     wps_registrar_pbc_overlap(wps->wps->registrar,
2673					       wps->mac_addr_e, wps->uuid_e) ||
2674		     !wps_registrar_p2p_dev_addr_match(wps)) &&
2675		    !wps_registrar_skip_overlap(wps)) {
2676			wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2677				   "negotiation");
2678			wps->state = SEND_M2D;
2679			wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2680			wps_pbc_overlap_event(wps->wps);
2681			wps_fail_event(wps->wps, WPS_M1,
2682				       WPS_CFG_MULTIPLE_PBC_DETECTED,
2683				       WPS_EI_NO_ERROR, wps->mac_addr_e);
2684			wps->wps->registrar->force_pbc_overlap = 1;
2685			return WPS_CONTINUE;
2686		}
2687		wps_registrar_add_pbc_session(wps->wps->registrar,
2688					      wps->mac_addr_e, wps->uuid_e);
2689		wps->pbc = 1;
2690	}
2691
2692#ifdef WPS_WORKAROUNDS
2693	/*
2694	 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2695	 * passphrase format. To avoid interop issues, force PSK format to be
2696	 * used.
2697	 */
2698	if (!wps->use_psk_key &&
2699	    wps->peer_dev.manufacturer &&
2700	    os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2701	    wps->peer_dev.model_name &&
2702	    os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2703		wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2704			   "PSK format");
2705		wps->use_psk_key = 1;
2706	}
2707#endif /* WPS_WORKAROUNDS */
2708
2709	wps->state = SEND_M2;
2710	return WPS_CONTINUE;
2711}
2712
2713
2714static enum wps_process_res wps_process_m3(struct wps_data *wps,
2715					   const struct wpabuf *msg,
2716					   struct wps_parse_attr *attr)
2717{
2718	wpa_printf(MSG_DEBUG, "WPS: Received M3");
2719
2720	if (wps->state != RECV_M3) {
2721		wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2722			   "receiving M3", wps->state);
2723		wps->state = SEND_WSC_NACK;
2724		return WPS_CONTINUE;
2725	}
2726
2727	if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2728	    !wps_registrar_skip_overlap(wps)) {
2729		wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2730			   "session overlap");
2731		wps->state = SEND_WSC_NACK;
2732		wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2733		return WPS_CONTINUE;
2734	}
2735
2736	if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2737	    wps_process_authenticator(wps, attr->authenticator, msg) ||
2738	    wps_process_e_hash1(wps, attr->e_hash1) ||
2739	    wps_process_e_hash2(wps, attr->e_hash2)) {
2740		wps->state = SEND_WSC_NACK;
2741		return WPS_CONTINUE;
2742	}
2743
2744	wps->state = SEND_M4;
2745	return WPS_CONTINUE;
2746}
2747
2748
2749static enum wps_process_res wps_process_m5(struct wps_data *wps,
2750					   const struct wpabuf *msg,
2751					   struct wps_parse_attr *attr)
2752{
2753	struct wpabuf *decrypted;
2754	struct wps_parse_attr eattr;
2755
2756	wpa_printf(MSG_DEBUG, "WPS: Received M5");
2757
2758	if (wps->state != RECV_M5) {
2759		wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2760			   "receiving M5", wps->state);
2761		wps->state = SEND_WSC_NACK;
2762		return WPS_CONTINUE;
2763	}
2764
2765	if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2766	    !wps_registrar_skip_overlap(wps)) {
2767		wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2768			   "session overlap");
2769		wps->state = SEND_WSC_NACK;
2770		wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2771		return WPS_CONTINUE;
2772	}
2773
2774	if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2775	    wps_process_authenticator(wps, attr->authenticator, msg)) {
2776		wps->state = SEND_WSC_NACK;
2777		return WPS_CONTINUE;
2778	}
2779
2780	decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2781					      attr->encr_settings_len);
2782	if (decrypted == NULL) {
2783		wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2784			   "Settings attribute");
2785		wps->state = SEND_WSC_NACK;
2786		return WPS_CONTINUE;
2787	}
2788
2789	if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2790		wpabuf_clear_free(decrypted);
2791		wps->state = SEND_WSC_NACK;
2792		return WPS_CONTINUE;
2793	}
2794
2795	wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2796		   "attribute");
2797	if (wps_parse_msg(decrypted, &eattr) < 0 ||
2798	    wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2799	    wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2800		wpabuf_clear_free(decrypted);
2801		wps->state = SEND_WSC_NACK;
2802		return WPS_CONTINUE;
2803	}
2804	wpabuf_clear_free(decrypted);
2805
2806	wps->state = SEND_M6;
2807	return WPS_CONTINUE;
2808}
2809
2810
2811static void wps_sta_cred_cb(struct wps_data *wps)
2812{
2813	/*
2814	 * Update credential to only include a single authentication and
2815	 * encryption type in case the AP configuration includes more than one
2816	 * option.
2817	 */
2818	if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2819		wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2820	else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2821		wps->cred.auth_type = WPS_AUTH_WPAPSK;
2822	if (wps->cred.encr_type & WPS_ENCR_AES)
2823		wps->cred.encr_type = WPS_ENCR_AES;
2824	else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2825		wps->cred.encr_type = WPS_ENCR_TKIP;
2826	wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2827		   "AP configuration");
2828	if (wps->wps->cred_cb)
2829		wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2830}
2831
2832
2833static void wps_cred_update(struct wps_credential *dst,
2834			    struct wps_credential *src)
2835{
2836	os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2837	dst->ssid_len = src->ssid_len;
2838	dst->auth_type = src->auth_type;
2839	dst->encr_type = src->encr_type;
2840	dst->key_idx = src->key_idx;
2841	os_memcpy(dst->key, src->key, sizeof(dst->key));
2842	dst->key_len = src->key_len;
2843}
2844
2845
2846static int wps_process_ap_settings_r(struct wps_data *wps,
2847				     struct wps_parse_attr *attr)
2848{
2849	struct wpabuf *msg;
2850
2851	if (wps->wps->ap || wps->er)
2852		return 0;
2853
2854	/* AP Settings Attributes in M7 when Enrollee is an AP */
2855	if (wps_process_ap_settings(attr, &wps->cred) < 0)
2856		return -1;
2857
2858	wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2859
2860	if (wps->new_ap_settings) {
2861		wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2862			   "new settings");
2863		wps_cred_update(&wps->cred, wps->new_ap_settings);
2864		return 0;
2865	} else {
2866		/*
2867		 * Use the AP PIN only to receive the current AP settings, not
2868		 * to reconfigure the AP.
2869		 */
2870
2871		/*
2872		 * Clear selected registrar here since we do not get to
2873		 * WSC_Done in this protocol run.
2874		 */
2875		wps_registrar_pin_completed(wps->wps->registrar);
2876
2877		msg = wps_build_ap_cred(wps);
2878		if (msg == NULL)
2879			return -1;
2880		wps->cred.cred_attr = wpabuf_head(msg);
2881		wps->cred.cred_attr_len = wpabuf_len(msg);
2882
2883		if (wps->ap_settings_cb) {
2884			wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2885					    &wps->cred);
2886			wpabuf_free(msg);
2887			return 1;
2888		}
2889		wps_sta_cred_cb(wps);
2890
2891		wps->cred.cred_attr = NULL;
2892		wps->cred.cred_attr_len = 0;
2893		wpabuf_free(msg);
2894
2895		return 1;
2896	}
2897}
2898
2899
2900static enum wps_process_res wps_process_m7(struct wps_data *wps,
2901					   const struct wpabuf *msg,
2902					   struct wps_parse_attr *attr)
2903{
2904	struct wpabuf *decrypted;
2905	struct wps_parse_attr eattr;
2906
2907	wpa_printf(MSG_DEBUG, "WPS: Received M7");
2908
2909	if (wps->state != RECV_M7) {
2910		wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2911			   "receiving M7", wps->state);
2912		wps->state = SEND_WSC_NACK;
2913		return WPS_CONTINUE;
2914	}
2915
2916	if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2917	    !wps_registrar_skip_overlap(wps)) {
2918		wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2919			   "session overlap");
2920		wps->state = SEND_WSC_NACK;
2921		wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2922		return WPS_CONTINUE;
2923	}
2924
2925	if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2926	    wps_process_authenticator(wps, attr->authenticator, msg)) {
2927		wps->state = SEND_WSC_NACK;
2928		return WPS_CONTINUE;
2929	}
2930
2931	decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2932					      attr->encr_settings_len);
2933	if (decrypted == NULL) {
2934		wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2935			   "Settings attribute");
2936		wps->state = SEND_WSC_NACK;
2937		return WPS_CONTINUE;
2938	}
2939
2940	if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2941				 attr->version2 != NULL) < 0) {
2942		wpabuf_clear_free(decrypted);
2943		wps->state = SEND_WSC_NACK;
2944		return WPS_CONTINUE;
2945	}
2946
2947	wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2948		   "attribute");
2949	if (wps_parse_msg(decrypted, &eattr) < 0 ||
2950	    wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2951	    wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2952	    wps_process_ap_settings_r(wps, &eattr)) {
2953		wpabuf_clear_free(decrypted);
2954		wps->state = SEND_WSC_NACK;
2955		return WPS_CONTINUE;
2956	}
2957
2958	wpabuf_clear_free(decrypted);
2959
2960	wps->state = SEND_M8;
2961	return WPS_CONTINUE;
2962}
2963
2964
2965static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2966						const struct wpabuf *msg)
2967{
2968	struct wps_parse_attr attr;
2969	enum wps_process_res ret = WPS_CONTINUE;
2970
2971	wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2972
2973	if (wps_parse_msg(msg, &attr) < 0)
2974		return WPS_FAILURE;
2975
2976	if (attr.msg_type == NULL) {
2977		wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2978		wps->state = SEND_WSC_NACK;
2979		return WPS_CONTINUE;
2980	}
2981
2982	if (*attr.msg_type != WPS_M1 &&
2983	    (attr.registrar_nonce == NULL ||
2984	     os_memcmp(wps->nonce_r, attr.registrar_nonce,
2985		       WPS_NONCE_LEN) != 0)) {
2986		wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2987		return WPS_FAILURE;
2988	}
2989
2990	switch (*attr.msg_type) {
2991	case WPS_M1:
2992		if (wps_validate_m1(msg) < 0)
2993			return WPS_FAILURE;
2994#ifdef CONFIG_WPS_UPNP
2995		if (wps->wps->wps_upnp && attr.mac_addr) {
2996			/* Remove old pending messages when starting new run */
2997			wps_free_pending_msgs(wps->wps->upnp_msgs);
2998			wps->wps->upnp_msgs = NULL;
2999
3000			upnp_wps_device_send_wlan_event(
3001				wps->wps->wps_upnp, attr.mac_addr,
3002				UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
3003		}
3004#endif /* CONFIG_WPS_UPNP */
3005		ret = wps_process_m1(wps, &attr);
3006		break;
3007	case WPS_M3:
3008		if (wps_validate_m3(msg) < 0)
3009			return WPS_FAILURE;
3010		ret = wps_process_m3(wps, msg, &attr);
3011		if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3012			wps_fail_event(wps->wps, WPS_M3, wps->config_error,
3013				       wps->error_indication, wps->mac_addr_e);
3014		break;
3015	case WPS_M5:
3016		if (wps_validate_m5(msg) < 0)
3017			return WPS_FAILURE;
3018		ret = wps_process_m5(wps, msg, &attr);
3019		if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3020			wps_fail_event(wps->wps, WPS_M5, wps->config_error,
3021				       wps->error_indication, wps->mac_addr_e);
3022		break;
3023	case WPS_M7:
3024		if (wps_validate_m7(msg) < 0)
3025			return WPS_FAILURE;
3026		ret = wps_process_m7(wps, msg, &attr);
3027		if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3028			wps_fail_event(wps->wps, WPS_M7, wps->config_error,
3029				       wps->error_indication, wps->mac_addr_e);
3030		break;
3031	default:
3032		wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
3033			   *attr.msg_type);
3034		return WPS_FAILURE;
3035	}
3036
3037	if (ret == WPS_CONTINUE) {
3038		/* Save a copy of the last message for Authenticator derivation
3039		 */
3040		wpabuf_free(wps->last_msg);
3041		wps->last_msg = wpabuf_dup(msg);
3042	}
3043
3044	return ret;
3045}
3046
3047
3048static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3049						const struct wpabuf *msg)
3050{
3051	struct wps_parse_attr attr;
3052
3053	wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3054
3055	if (wps_parse_msg(msg, &attr) < 0)
3056		return WPS_FAILURE;
3057
3058	if (attr.msg_type == NULL) {
3059		wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3060		return WPS_FAILURE;
3061	}
3062
3063	if (*attr.msg_type != WPS_WSC_ACK) {
3064		wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3065			   *attr.msg_type);
3066		return WPS_FAILURE;
3067	}
3068
3069#ifdef CONFIG_WPS_UPNP
3070	if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3071	    upnp_wps_subscribers(wps->wps->wps_upnp)) {
3072		if (wps->wps->upnp_msgs)
3073			return WPS_CONTINUE;
3074		wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3075			   "external Registrar");
3076		return WPS_PENDING;
3077	}
3078#endif /* CONFIG_WPS_UPNP */
3079
3080	if (attr.registrar_nonce == NULL ||
3081	    os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3082	{
3083		wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3084		return WPS_FAILURE;
3085	}
3086
3087	if (attr.enrollee_nonce == NULL ||
3088	    os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3089		wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3090		return WPS_FAILURE;
3091	}
3092
3093	if (wps->state == RECV_M2D_ACK) {
3094#ifdef CONFIG_WPS_UPNP
3095		if (wps->wps->wps_upnp &&
3096		    upnp_wps_subscribers(wps->wps->wps_upnp)) {
3097			if (wps->wps->upnp_msgs)
3098				return WPS_CONTINUE;
3099			if (wps->ext_reg == 0)
3100				wps->ext_reg = 1;
3101			wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3102				   "external Registrar");
3103			return WPS_PENDING;
3104		}
3105#endif /* CONFIG_WPS_UPNP */
3106
3107		wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3108			   "terminate negotiation");
3109	}
3110
3111	return WPS_FAILURE;
3112}
3113
3114
3115static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3116						 const struct wpabuf *msg)
3117{
3118	struct wps_parse_attr attr;
3119	int old_state;
3120	u16 config_error;
3121
3122	wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3123
3124	old_state = wps->state;
3125	wps->state = SEND_WSC_NACK;
3126
3127	if (wps_parse_msg(msg, &attr) < 0)
3128		return WPS_FAILURE;
3129
3130	if (attr.msg_type == NULL) {
3131		wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3132		return WPS_FAILURE;
3133	}
3134
3135	if (*attr.msg_type != WPS_WSC_NACK) {
3136		wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3137			   *attr.msg_type);
3138		return WPS_FAILURE;
3139	}
3140
3141#ifdef CONFIG_WPS_UPNP
3142	if (wps->wps->wps_upnp && wps->ext_reg) {
3143		wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3144			   "Registrar terminated by the Enrollee");
3145		return WPS_FAILURE;
3146	}
3147#endif /* CONFIG_WPS_UPNP */
3148
3149	if (attr.registrar_nonce == NULL ||
3150	    os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3151	{
3152		wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3153		return WPS_FAILURE;
3154	}
3155
3156	if (attr.enrollee_nonce == NULL ||
3157	    os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3158		wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3159		return WPS_FAILURE;
3160	}
3161
3162	if (attr.config_error == NULL) {
3163		wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3164			   "in WSC_NACK");
3165		return WPS_FAILURE;
3166	}
3167
3168	config_error = WPA_GET_BE16(attr.config_error);
3169	wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3170		   "Configuration Error %d", config_error);
3171
3172	switch (old_state) {
3173	case RECV_M3:
3174		wps_fail_event(wps->wps, WPS_M2, config_error,
3175			       wps->error_indication, wps->mac_addr_e);
3176		break;
3177	case RECV_M5:
3178		wps_fail_event(wps->wps, WPS_M4, config_error,
3179			       wps->error_indication, wps->mac_addr_e);
3180		break;
3181	case RECV_M7:
3182		wps_fail_event(wps->wps, WPS_M6, config_error,
3183			       wps->error_indication, wps->mac_addr_e);
3184		break;
3185	case RECV_DONE:
3186		wps_fail_event(wps->wps, WPS_M8, config_error,
3187			       wps->error_indication, wps->mac_addr_e);
3188		break;
3189	default:
3190		break;
3191	}
3192
3193	return WPS_FAILURE;
3194}
3195
3196
3197static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3198						 const struct wpabuf *msg)
3199{
3200	struct wps_parse_attr attr;
3201
3202	wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3203
3204	if (wps->state != RECV_DONE &&
3205	    (!wps->wps->wps_upnp || !wps->ext_reg)) {
3206		wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3207			   "receiving WSC_Done", wps->state);
3208		return WPS_FAILURE;
3209	}
3210
3211	if (wps_parse_msg(msg, &attr) < 0)
3212		return WPS_FAILURE;
3213
3214	if (attr.msg_type == NULL) {
3215		wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3216		return WPS_FAILURE;
3217	}
3218
3219	if (*attr.msg_type != WPS_WSC_DONE) {
3220		wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3221			   *attr.msg_type);
3222		return WPS_FAILURE;
3223	}
3224
3225#ifdef CONFIG_WPS_UPNP
3226	if (wps->wps->wps_upnp && wps->ext_reg) {
3227		wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3228			   "Registrar completed successfully");
3229		wps_device_store(wps->wps->registrar, &wps->peer_dev,
3230				 wps->uuid_e);
3231		return WPS_DONE;
3232	}
3233#endif /* CONFIG_WPS_UPNP */
3234
3235	if (attr.registrar_nonce == NULL ||
3236	    os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3237	{
3238		wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3239		return WPS_FAILURE;
3240	}
3241
3242	if (attr.enrollee_nonce == NULL ||
3243	    os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3244		wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3245		return WPS_FAILURE;
3246	}
3247
3248	wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3249	wps_device_store(wps->wps->registrar, &wps->peer_dev,
3250			 wps->uuid_e);
3251
3252	if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3253	    wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3254		struct wps_credential cred;
3255
3256		wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3257			   "on first Enrollee connection");
3258
3259		os_memset(&cred, 0, sizeof(cred));
3260		os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3261		cred.ssid_len = wps->wps->ssid_len;
3262		if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) {
3263			cred.auth_type = WPS_AUTH_WPA2PSK;
3264			cred.encr_type = WPS_ENCR_AES;
3265		} else {
3266			cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3267			cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3268		}
3269		os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3270		cred.key_len = wps->new_psk_len;
3271
3272		wps->wps->wps_state = WPS_STATE_CONFIGURED;
3273		wpa_hexdump_ascii_key(MSG_DEBUG,
3274				      "WPS: Generated random passphrase",
3275				      wps->new_psk, wps->new_psk_len);
3276		if (wps->wps->cred_cb)
3277			wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3278
3279		os_free(wps->new_psk);
3280		wps->new_psk = NULL;
3281	}
3282
3283	if (!wps->wps->ap && !wps->er)
3284		wps_sta_cred_cb(wps);
3285
3286	if (wps->new_psk) {
3287		if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3288				   wps->p2p_dev_addr, wps->new_psk,
3289				   wps->new_psk_len)) {
3290			wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3291				   "new PSK");
3292		}
3293		os_free(wps->new_psk);
3294		wps->new_psk = NULL;
3295	}
3296
3297	wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3298			   wps->dev_password, wps->dev_password_len);
3299
3300	if (wps->pbc) {
3301		wps_registrar_remove_pbc_session(wps->wps->registrar,
3302						 wps->uuid_e,
3303						 wps->p2p_dev_addr);
3304		wps_registrar_pbc_completed(wps->wps->registrar);
3305#ifdef WPS_WORKAROUNDS
3306		os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3307#endif /* WPS_WORKAROUNDS */
3308		os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3309			  WPS_UUID_LEN);
3310	} else {
3311		wps_registrar_pin_completed(wps->wps->registrar);
3312	}
3313	/* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3314	 * merge them into APs own list.. */
3315
3316	wps_success_event(wps->wps, wps->mac_addr_e);
3317
3318	return WPS_DONE;
3319}
3320
3321
3322enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3323					       enum wsc_op_code op_code,
3324					       const struct wpabuf *msg)
3325{
3326	enum wps_process_res ret;
3327
3328	wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3329		   "op_code=%d)",
3330		   (unsigned long) wpabuf_len(msg), op_code);
3331
3332#ifdef CONFIG_WPS_UPNP
3333	if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3334		struct wps_parse_attr attr;
3335		if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3336		    *attr.msg_type == WPS_M3)
3337			wps->ext_reg = 2; /* past M2/M2D phase */
3338	}
3339	if (wps->ext_reg > 1)
3340		wps_registrar_free_pending_m2(wps->wps);
3341	if (wps->wps->wps_upnp && wps->ext_reg &&
3342	    wps->wps->upnp_msgs == NULL &&
3343	    (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3344	{
3345		struct wps_parse_attr attr;
3346		int type;
3347		if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3348			type = -1;
3349		else
3350			type = *attr.msg_type;
3351		wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3352			   " to external Registrar for processing", type);
3353		upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3354						wps->mac_addr_e,
3355						UPNP_WPS_WLANEVENT_TYPE_EAP,
3356						msg);
3357		if (op_code == WSC_MSG)
3358			return WPS_PENDING;
3359	} else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3360		wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3361			   "external Registrar");
3362		return WPS_CONTINUE;
3363	}
3364#endif /* CONFIG_WPS_UPNP */
3365
3366	switch (op_code) {
3367	case WSC_MSG:
3368		return wps_process_wsc_msg(wps, msg);
3369	case WSC_ACK:
3370		if (wps_validate_wsc_ack(msg) < 0)
3371			return WPS_FAILURE;
3372		return wps_process_wsc_ack(wps, msg);
3373	case WSC_NACK:
3374		if (wps_validate_wsc_nack(msg) < 0)
3375			return WPS_FAILURE;
3376		return wps_process_wsc_nack(wps, msg);
3377	case WSC_Done:
3378		if (wps_validate_wsc_done(msg) < 0)
3379			return WPS_FAILURE;
3380		ret = wps_process_wsc_done(wps, msg);
3381		if (ret == WPS_FAILURE) {
3382			wps->state = SEND_WSC_NACK;
3383			wps_fail_event(wps->wps, WPS_WSC_DONE,
3384				       wps->config_error,
3385				       wps->error_indication, wps->mac_addr_e);
3386		}
3387		return ret;
3388	default:
3389		wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3390		return WPS_FAILURE;
3391	}
3392}
3393
3394
3395int wps_registrar_update_ie(struct wps_registrar *reg)
3396{
3397	return wps_set_ie(reg);
3398}
3399
3400
3401static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3402					       void *timeout_ctx)
3403{
3404	struct wps_registrar *reg = eloop_ctx;
3405
3406	wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3407		   "unselect internal Registrar");
3408	reg->selected_registrar = 0;
3409	reg->pbc = 0;
3410	wps_registrar_selected_registrar_changed(reg, 0);
3411}
3412
3413
3414#ifdef CONFIG_WPS_UPNP
3415static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3416				      struct subscription *s)
3417{
3418	int i, j;
3419	wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3420		   "config_methods=0x%x)",
3421		   s->dev_password_id, s->config_methods);
3422	reg->sel_reg_union = 1;
3423	if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3424		reg->sel_reg_dev_password_id_override = s->dev_password_id;
3425	if (reg->sel_reg_config_methods_override == -1)
3426		reg->sel_reg_config_methods_override = 0;
3427	reg->sel_reg_config_methods_override |= s->config_methods;
3428	for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3429		if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3430			break;
3431	for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3432	     j++) {
3433		if (is_zero_ether_addr(s->authorized_macs[j]))
3434			break;
3435		wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3436			   MACSTR, MAC2STR(s->authorized_macs[j]));
3437		os_memcpy(reg->authorized_macs_union[i],
3438			  s->authorized_macs[j], ETH_ALEN);
3439		i++;
3440	}
3441	wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3442		    (u8 *) reg->authorized_macs_union,
3443		    sizeof(reg->authorized_macs_union));
3444}
3445#endif /* CONFIG_WPS_UPNP */
3446
3447
3448static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3449{
3450#ifdef CONFIG_WPS_UPNP
3451	struct subscription *s;
3452
3453	if (reg->wps->wps_upnp == NULL)
3454		return;
3455
3456	dl_list_for_each(s, &reg->wps->wps_upnp->subscriptions,
3457			 struct subscription, list) {
3458		struct subscr_addr *sa;
3459		sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3460		if (sa) {
3461			wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3462				   inet_ntoa(sa->saddr.sin_addr),
3463				   ntohs(sa->saddr.sin_port));
3464		}
3465		if (s->selected_registrar)
3466			wps_registrar_sel_reg_add(reg, s);
3467		else
3468			wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3469				   "selected");
3470	}
3471#endif /* CONFIG_WPS_UPNP */
3472}
3473
3474
3475/**
3476 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3477 * @reg: Registrar data from wps_registrar_init()
3478 *
3479 * This function is called when selected registrar state changes, e.g., when an
3480 * AP receives a SetSelectedRegistrar UPnP message.
3481 */
3482void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3483					      u16 dev_pw_id)
3484{
3485	wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3486
3487	reg->sel_reg_union = reg->selected_registrar;
3488	reg->sel_reg_dev_password_id_override = -1;
3489	reg->sel_reg_config_methods_override = -1;
3490	os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3491		  WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3492	wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3493		    (u8 *) reg->authorized_macs_union,
3494		    sizeof(reg->authorized_macs_union));
3495	if (reg->selected_registrar) {
3496		u16 methods;
3497
3498		methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3499		methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3500			     WPS_CONFIG_PHY_PUSHBUTTON);
3501		if (reg->pbc) {
3502			reg->sel_reg_dev_password_id_override =
3503				DEV_PW_PUSHBUTTON;
3504			wps_set_pushbutton(&methods, reg->wps->config_methods);
3505		} else if (dev_pw_id)
3506			reg->sel_reg_dev_password_id_override = dev_pw_id;
3507		wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3508			   "(pbc=%d)", reg->pbc);
3509		reg->sel_reg_config_methods_override = methods;
3510	} else
3511		wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3512
3513	wps_registrar_sel_reg_union(reg);
3514
3515	wps_set_ie(reg);
3516	wps_cb_set_sel_reg(reg);
3517}
3518
3519
3520int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3521			   char *buf, size_t buflen)
3522{
3523	struct wps_registrar_device *d;
3524	int len = 0, ret;
3525	char uuid[40];
3526	char devtype[WPS_DEV_TYPE_BUFSIZE];
3527
3528	d = wps_device_get(reg, addr);
3529	if (d == NULL)
3530		return 0;
3531	if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3532		return 0;
3533
3534	ret = os_snprintf(buf + len, buflen - len,
3535			  "wpsUuid=%s\n"
3536			  "wpsPrimaryDeviceType=%s\n"
3537			  "wpsDeviceName=%s\n"
3538			  "wpsManufacturer=%s\n"
3539			  "wpsModelName=%s\n"
3540			  "wpsModelNumber=%s\n"
3541			  "wpsSerialNumber=%s\n",
3542			  uuid,
3543			  wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3544					       sizeof(devtype)),
3545			  d->dev.device_name ? d->dev.device_name : "",
3546			  d->dev.manufacturer ? d->dev.manufacturer : "",
3547			  d->dev.model_name ? d->dev.model_name : "",
3548			  d->dev.model_number ? d->dev.model_number : "",
3549			  d->dev.serial_number ? d->dev.serial_number : "");
3550	if (os_snprintf_error(buflen - len, ret))
3551		return len;
3552	len += ret;
3553
3554	return len;
3555}
3556
3557
3558int wps_registrar_config_ap(struct wps_registrar *reg,
3559			    struct wps_credential *cred)
3560{
3561	wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3562	if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3563				 WPS_ENCR_AES))) {
3564		if (cred->encr_type & WPS_ENCR_WEP) {
3565			wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3566				   "due to WEP configuration");
3567			return -1;
3568		}
3569
3570		wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3571			   "invalid encr_type 0x%x", cred->encr_type);
3572		return -1;
3573	}
3574
3575	if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3576	    WPS_ENCR_TKIP) {
3577		wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3578			   "TKIP+AES");
3579		cred->encr_type |= WPS_ENCR_AES;
3580	}
3581
3582	if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3583	    WPS_AUTH_WPAPSK) {
3584		wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3585			   "WPAPSK+WPA2PSK");
3586		cred->auth_type |= WPS_AUTH_WPA2PSK;
3587	}
3588
3589	if (reg->wps->cred_cb)
3590		return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3591
3592	return -1;
3593}
3594
3595
3596#ifdef CONFIG_WPS_NFC
3597
3598int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3599				   const u8 *pubkey_hash, u16 pw_id,
3600				   const u8 *dev_pw, size_t dev_pw_len,
3601				   int pk_hash_provided_oob)
3602{
3603	struct wps_nfc_pw_token *token;
3604
3605	if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3606		return -1;
3607
3608	if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3609	    (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3610		wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3611			   "addition - missing public key hash");
3612		return -1;
3613	}
3614
3615	wps_free_nfc_pw_tokens(&reg->nfc_pw_tokens, pw_id);
3616
3617	token = os_zalloc(sizeof(*token));
3618	if (token == NULL)
3619		return -1;
3620
3621	token->peer_pk_hash_known = pubkey_hash != NULL;
3622	if (pubkey_hash)
3623		os_memcpy(token->pubkey_hash, pubkey_hash,
3624			  WPS_OOB_PUBKEY_HASH_LEN);
3625	token->pw_id = pw_id;
3626	token->pk_hash_provided_oob = pk_hash_provided_oob;
3627	if (dev_pw) {
3628		wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3629					   sizeof(token->dev_pw),
3630					   dev_pw, dev_pw_len);
3631		token->dev_pw_len = dev_pw_len * 2;
3632	}
3633
3634	dl_list_add(&reg->nfc_pw_tokens, &token->list);
3635
3636	reg->selected_registrar = 1;
3637	reg->pbc = 0;
3638	wps_registrar_add_authorized_mac(reg,
3639					 (u8 *) "\xff\xff\xff\xff\xff\xff");
3640	wps_registrar_selected_registrar_changed(reg, pw_id);
3641	eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3642	eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3643			       wps_registrar_set_selected_timeout,
3644			       reg, NULL);
3645
3646	wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3647		   pw_id);
3648
3649	return 0;
3650}
3651
3652
3653int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3654					 const u8 *oob_dev_pw,
3655					 size_t oob_dev_pw_len)
3656{
3657	const u8 *pos, *hash, *dev_pw;
3658	u16 id;
3659	size_t dev_pw_len;
3660
3661	if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3662	    oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3663	    WPS_OOB_DEVICE_PASSWORD_LEN)
3664		return -1;
3665
3666	hash = oob_dev_pw;
3667	pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3668	id = WPA_GET_BE16(pos);
3669	dev_pw = pos + 2;
3670	dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3671
3672	wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3673		   id);
3674
3675	wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3676		    hash, WPS_OOB_PUBKEY_HASH_LEN);
3677	wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3678
3679	return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3680					      dev_pw_len, 0);
3681}
3682
3683
3684void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3685				       struct wps_nfc_pw_token *token)
3686{
3687	wps_registrar_remove_authorized_mac(reg,
3688					    (u8 *) "\xff\xff\xff\xff\xff\xff");
3689	wps_registrar_selected_registrar_changed(reg, 0);
3690
3691	/*
3692	 * Free the NFC password token if it was used only for a single protocol
3693	 * run. The static handover case uses the same password token multiple
3694	 * times, so do not free that case here.
3695	 */
3696	if (token->peer_pk_hash_known)
3697		os_free(token);
3698}
3699
3700#endif /* CONFIG_WPS_NFC */
3701