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1 /*
2  * Wi-Fi Protected Setup
3  * Copyright (c) 2007-2009, 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 "includes.h"
10 
11 #include "common.h"
12 #include "crypto/dh_group5.h"
13 #include "common/ieee802_11_defs.h"
14 #include "wps_i.h"
15 #include "wps_dev_attr.h"
16 
17 
18 #ifdef CONFIG_WPS_TESTING
19 int wps_version_number = 0x20;
20 int wps_testing_dummy_cred = 0;
21 int wps_corrupt_pkhash = 0;
22 int wps_force_auth_types_in_use = 0;
23 u16 wps_force_auth_types = 0;
24 int wps_force_encr_types_in_use = 0;
25 u16 wps_force_encr_types = 0;
26 #endif /* CONFIG_WPS_TESTING */
27 
28 
29 /**
30  * wps_init - Initialize WPS Registration protocol data
31  * @cfg: WPS configuration
32  * Returns: Pointer to allocated data or %NULL on failure
33  *
34  * This function is used to initialize WPS data for a registration protocol
35  * instance (i.e., each run of registration protocol as a Registrar of
36  * Enrollee. The caller is responsible for freeing this data after the
37  * registration run has been completed by calling wps_deinit().
38  */
wps_init(const struct wps_config * cfg)39 struct wps_data * wps_init(const struct wps_config *cfg)
40 {
41 	struct wps_data *data = os_zalloc(sizeof(*data));
42 	if (data == NULL)
43 		return NULL;
44 	data->wps = cfg->wps;
45 	data->registrar = cfg->registrar;
46 	if (cfg->registrar) {
47 		os_memcpy(data->uuid_r, cfg->wps->uuid, WPS_UUID_LEN);
48 	} else {
49 		os_memcpy(data->mac_addr_e, cfg->wps->dev.mac_addr, ETH_ALEN);
50 		os_memcpy(data->uuid_e, cfg->wps->uuid, WPS_UUID_LEN);
51 	}
52 	if (cfg->pin) {
53 		data->dev_pw_id = cfg->dev_pw_id;
54 		data->dev_password = os_memdup(cfg->pin, cfg->pin_len);
55 		if (data->dev_password == NULL) {
56 			os_free(data);
57 			return NULL;
58 		}
59 		data->dev_password_len = cfg->pin_len;
60 		wpa_hexdump_key(MSG_DEBUG, "WPS: AP PIN dev_password",
61 				data->dev_password, data->dev_password_len);
62 	}
63 
64 #ifdef CONFIG_WPS_NFC
65 	if (cfg->pin == NULL &&
66 	    cfg->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
67 		data->dev_pw_id = cfg->dev_pw_id;
68 
69 	if (cfg->wps->ap && !cfg->registrar && cfg->wps->ap_nfc_dev_pw_id) {
70 		/* Keep AP PIN as alternative Device Password */
71 		data->alt_dev_pw_id = data->dev_pw_id;
72 		data->alt_dev_password = data->dev_password;
73 		data->alt_dev_password_len = data->dev_password_len;
74 
75 		data->dev_pw_id = cfg->wps->ap_nfc_dev_pw_id;
76 		data->dev_password =
77 			os_memdup(wpabuf_head(cfg->wps->ap_nfc_dev_pw),
78 				  wpabuf_len(cfg->wps->ap_nfc_dev_pw));
79 		if (data->dev_password == NULL) {
80 			os_free(data);
81 			return NULL;
82 		}
83 		data->dev_password_len = wpabuf_len(cfg->wps->ap_nfc_dev_pw);
84 		wpa_hexdump_key(MSG_DEBUG, "WPS: NFC dev_password",
85 			    data->dev_password, data->dev_password_len);
86 	}
87 #endif /* CONFIG_WPS_NFC */
88 
89 	data->pbc = cfg->pbc;
90 	if (cfg->pbc) {
91 		/* Use special PIN '00000000' for PBC */
92 		data->dev_pw_id = DEV_PW_PUSHBUTTON;
93 		bin_clear_free(data->dev_password, data->dev_password_len);
94 		data->dev_password = (u8 *) os_strdup("00000000");
95 		if (data->dev_password == NULL) {
96 			os_free(data);
97 			return NULL;
98 		}
99 		data->dev_password_len = 8;
100 	}
101 
102 	data->state = data->registrar ? RECV_M1 : SEND_M1;
103 
104 	if (cfg->assoc_wps_ie) {
105 		struct wps_parse_attr attr;
106 		wpa_hexdump_buf(MSG_DEBUG, "WPS: WPS IE from (Re)AssocReq",
107 				cfg->assoc_wps_ie);
108 		if (wps_parse_msg(cfg->assoc_wps_ie, &attr) < 0) {
109 			wpa_printf(MSG_DEBUG, "WPS: Failed to parse WPS IE "
110 				   "from (Re)AssocReq");
111 		} else if (attr.request_type == NULL) {
112 			wpa_printf(MSG_DEBUG, "WPS: No Request Type attribute "
113 				   "in (Re)AssocReq WPS IE");
114 		} else {
115 			wpa_printf(MSG_DEBUG, "WPS: Request Type (from WPS IE "
116 				   "in (Re)AssocReq WPS IE): %d",
117 				   *attr.request_type);
118 			data->request_type = *attr.request_type;
119 		}
120 	}
121 
122 	if (cfg->new_ap_settings) {
123 		data->new_ap_settings =
124 			os_memdup(cfg->new_ap_settings,
125 				  sizeof(*data->new_ap_settings));
126 		if (data->new_ap_settings == NULL) {
127 			bin_clear_free(data->dev_password,
128 				       data->dev_password_len);
129 			os_free(data);
130 			return NULL;
131 		}
132 	}
133 
134 	if (cfg->peer_addr)
135 		os_memcpy(data->peer_dev.mac_addr, cfg->peer_addr, ETH_ALEN);
136 	if (cfg->p2p_dev_addr)
137 		os_memcpy(data->p2p_dev_addr, cfg->p2p_dev_addr, ETH_ALEN);
138 
139 	data->use_psk_key = cfg->use_psk_key;
140 	data->pbc_in_m1 = cfg->pbc_in_m1;
141 
142 	if (cfg->peer_pubkey_hash) {
143 		os_memcpy(data->peer_pubkey_hash, cfg->peer_pubkey_hash,
144 			  WPS_OOB_PUBKEY_HASH_LEN);
145 		data->peer_pubkey_hash_set = 1;
146 	}
147 
148 	data->multi_ap_backhaul_sta = cfg->multi_ap_backhaul_sta;
149 
150 	return data;
151 }
152 
153 
154 /**
155  * wps_deinit - Deinitialize WPS Registration protocol data
156  * @data: WPS Registration protocol data from wps_init()
157  */
wps_deinit(struct wps_data * data)158 void wps_deinit(struct wps_data *data)
159 {
160 #ifdef CONFIG_WPS_NFC
161 	if (data->registrar && data->nfc_pw_token)
162 		wps_registrar_remove_nfc_pw_token(data->wps->registrar,
163 						  data->nfc_pw_token);
164 #endif /* CONFIG_WPS_NFC */
165 
166 	if (data->wps_pin_revealed) {
167 		wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
168 			   "negotiation failed");
169 		if (data->registrar)
170 			wps_registrar_invalidate_pin(data->wps->registrar,
171 						     data->uuid_e);
172 	} else if (data->registrar)
173 		wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
174 
175 	wpabuf_clear_free(data->dh_privkey);
176 	wpabuf_free(data->dh_pubkey_e);
177 	wpabuf_free(data->dh_pubkey_r);
178 	wpabuf_free(data->last_msg);
179 	bin_clear_free(data->dev_password, data->dev_password_len);
180 	bin_clear_free(data->alt_dev_password, data->alt_dev_password_len);
181 	bin_clear_free(data->new_psk, data->new_psk_len);
182 	wps_device_data_free(&data->peer_dev);
183 	bin_clear_free(data->new_ap_settings, sizeof(*data->new_ap_settings));
184 	dh5_free(data->dh_ctx);
185 	os_free(data);
186 }
187 
188 
189 /**
190  * wps_process_msg - Process a WPS message
191  * @wps: WPS Registration protocol data from wps_init()
192  * @op_code: Message OP Code
193  * @msg: Message data
194  * Returns: Processing result
195  *
196  * This function is used to process WPS messages with OP Codes WSC_ACK,
197  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
198  * responsible for reassembling the messages before calling this function.
199  * Response to this message is built by calling wps_get_msg().
200  */
wps_process_msg(struct wps_data * wps,enum wsc_op_code op_code,const struct wpabuf * msg)201 enum wps_process_res wps_process_msg(struct wps_data *wps,
202 				     enum wsc_op_code op_code,
203 				     const struct wpabuf *msg)
204 {
205 	if (wps->registrar)
206 		return wps_registrar_process_msg(wps, op_code, msg);
207 	else
208 		return wps_enrollee_process_msg(wps, op_code, msg);
209 }
210 
211 
212 /**
213  * wps_get_msg - Build a WPS message
214  * @wps: WPS Registration protocol data from wps_init()
215  * @op_code: Buffer for returning message OP Code
216  * Returns: The generated WPS message or %NULL on failure
217  *
218  * This function is used to build a response to a message processed by calling
219  * wps_process_msg(). The caller is responsible for freeing the buffer.
220  */
wps_get_msg(struct wps_data * wps,enum wsc_op_code * op_code)221 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
222 {
223 	if (wps->registrar)
224 		return wps_registrar_get_msg(wps, op_code);
225 	else
226 		return wps_enrollee_get_msg(wps, op_code);
227 }
228 
229 
230 /**
231  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
232  * @msg: WPS IE contents from Beacon or Probe Response frame
233  * Returns: 1 if PBC Registrar is active, 0 if not
234  */
wps_is_selected_pbc_registrar(const struct wpabuf * msg)235 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
236 {
237 	struct wps_parse_attr attr;
238 
239 	/*
240 	 * In theory, this could also verify that attr.sel_reg_config_methods
241 	 * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
242 	 * do not set Selected Registrar Config Methods attribute properly, so
243 	 * it is safer to just use Device Password ID here.
244 	 */
245 
246 	if (wps_parse_msg(msg, &attr) < 0 ||
247 	    !attr.selected_registrar || *attr.selected_registrar == 0 ||
248 	    !attr.dev_password_id ||
249 	    WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
250 		return 0;
251 
252 #ifdef CONFIG_WPS_STRICT
253 	if (!attr.sel_reg_config_methods ||
254 	    !(WPA_GET_BE16(attr.sel_reg_config_methods) &
255 	      WPS_CONFIG_PUSHBUTTON))
256 		return 0;
257 #endif /* CONFIG_WPS_STRICT */
258 
259 	return 1;
260 }
261 
262 
is_selected_pin_registrar(struct wps_parse_attr * attr)263 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
264 {
265 	/*
266 	 * In theory, this could also verify that attr.sel_reg_config_methods
267 	 * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
268 	 * but some deployed AP implementations do not set Selected Registrar
269 	 * Config Methods attribute properly, so it is safer to just use
270 	 * Device Password ID here.
271 	 */
272 
273 	if (!attr->selected_registrar || *attr->selected_registrar == 0)
274 		return 0;
275 
276 	if (attr->dev_password_id != NULL &&
277 	    WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
278 		return 0;
279 
280 #ifdef CONFIG_WPS_STRICT
281 	if (!attr->sel_reg_config_methods ||
282 	    !(WPA_GET_BE16(attr->sel_reg_config_methods) &
283 	      (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
284 		return 0;
285 #endif /* CONFIG_WPS_STRICT */
286 
287 	return 1;
288 }
289 
290 
291 /**
292  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
293  * @msg: WPS IE contents from Beacon or Probe Response frame
294  * Returns: 1 if PIN Registrar is active, 0 if not
295  */
wps_is_selected_pin_registrar(const struct wpabuf * msg)296 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
297 {
298 	struct wps_parse_attr attr;
299 
300 	if (wps_parse_msg(msg, &attr) < 0)
301 		return 0;
302 
303 	return is_selected_pin_registrar(&attr);
304 }
305 
306 
307 /**
308  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
309  * @msg: WPS IE contents from Beacon or Probe Response frame
310  * @addr: MAC address to search for
311  * @ver1_compat: Whether to use version 1 compatibility mode
312  * Returns: 2 if the specified address is explicit authorized, 1 if address is
313  * authorized (broadcast), 0 if not
314  */
wps_is_addr_authorized(const struct wpabuf * msg,const u8 * addr,int ver1_compat)315 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
316 			   int ver1_compat)
317 {
318 	struct wps_parse_attr attr;
319 	unsigned int i;
320 	const u8 *pos;
321 	const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
322 
323 	if (wps_parse_msg(msg, &attr) < 0)
324 		return 0;
325 
326 	if (!attr.version2 && ver1_compat) {
327 		/*
328 		 * Version 1.0 AP - AuthorizedMACs not used, so revert back to
329 		 * old mechanism of using SelectedRegistrar.
330 		 */
331 		return is_selected_pin_registrar(&attr);
332 	}
333 
334 	if (!attr.authorized_macs)
335 		return 0;
336 
337 	pos = attr.authorized_macs;
338 	for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
339 		if (os_memcmp(pos, addr, ETH_ALEN) == 0)
340 			return 2;
341 		if (os_memcmp(pos, bcast, ETH_ALEN) == 0)
342 			return 1;
343 		pos += ETH_ALEN;
344 	}
345 
346 	return 0;
347 }
348 
349 
350 /**
351  * wps_ap_priority_compar - Prioritize WPS IE from two APs
352  * @wps_a: WPS IE contents from Beacon or Probe Response frame
353  * @wps_b: WPS IE contents from Beacon or Probe Response frame
354  * Returns: 1 if wps_b is considered more likely selection for WPS
355  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
356  */
wps_ap_priority_compar(const struct wpabuf * wps_a,const struct wpabuf * wps_b)357 int wps_ap_priority_compar(const struct wpabuf *wps_a,
358 			   const struct wpabuf *wps_b)
359 {
360 	struct wps_parse_attr attr;
361 	int sel_a, sel_b;
362 
363 	if (wps_a == NULL || wps_parse_msg(wps_a, &attr) < 0)
364 		return 1;
365 	sel_a = attr.selected_registrar && *attr.selected_registrar != 0;
366 
367 	if (wps_b == NULL || wps_parse_msg(wps_b, &attr) < 0)
368 		return -1;
369 	sel_b = attr.selected_registrar && *attr.selected_registrar != 0;
370 
371 	if (sel_a && !sel_b)
372 		return -1;
373 	if (!sel_a && sel_b)
374 		return 1;
375 
376 	return 0;
377 }
378 
379 
380 /**
381  * wps_get_uuid_e - Get UUID-E from WPS IE
382  * @msg: WPS IE contents from Beacon or Probe Response frame
383  * Returns: Pointer to UUID-E or %NULL if not included
384  *
385  * The returned pointer is to the msg contents and it remains valid only as
386  * long as the msg buffer is valid.
387  */
wps_get_uuid_e(const struct wpabuf * msg)388 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
389 {
390 	struct wps_parse_attr attr;
391 
392 	if (wps_parse_msg(msg, &attr) < 0)
393 		return NULL;
394 	return attr.uuid_e;
395 }
396 
397 
398 /**
399  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
400  */
wps_is_20(const struct wpabuf * msg)401 int wps_is_20(const struct wpabuf *msg)
402 {
403 	struct wps_parse_attr attr;
404 
405 	if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
406 		return 0;
407 	return attr.version2 != NULL;
408 }
409 
410 
411 /**
412  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
413  * @req_type: Value for Request Type attribute
414  * Returns: WPS IE or %NULL on failure
415  *
416  * The caller is responsible for freeing the buffer.
417  */
wps_build_assoc_req_ie(enum wps_request_type req_type)418 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
419 {
420 	struct wpabuf *ie;
421 	u8 *len;
422 
423 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
424 		   "Request");
425 	ie = wpabuf_alloc(100);
426 	if (ie == NULL)
427 		return NULL;
428 
429 	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
430 	len = wpabuf_put(ie, 1);
431 	wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
432 
433 	if (wps_build_version(ie) ||
434 	    wps_build_req_type(ie, req_type) ||
435 	    wps_build_wfa_ext(ie, 0, NULL, 0, 0)) {
436 		wpabuf_free(ie);
437 		return NULL;
438 	}
439 
440 	*len = wpabuf_len(ie) - 2;
441 
442 	return ie;
443 }
444 
445 
446 /**
447  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
448  * Returns: WPS IE or %NULL on failure
449  *
450  * The caller is responsible for freeing the buffer.
451  */
wps_build_assoc_resp_ie(void)452 struct wpabuf * wps_build_assoc_resp_ie(void)
453 {
454 	struct wpabuf *ie;
455 	u8 *len;
456 
457 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
458 		   "Response");
459 	ie = wpabuf_alloc(100);
460 	if (ie == NULL)
461 		return NULL;
462 
463 	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
464 	len = wpabuf_put(ie, 1);
465 	wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
466 
467 	if (wps_build_version(ie) ||
468 	    wps_build_resp_type(ie, WPS_RESP_AP) ||
469 	    wps_build_wfa_ext(ie, 0, NULL, 0, 0)) {
470 		wpabuf_free(ie);
471 		return NULL;
472 	}
473 
474 	*len = wpabuf_len(ie) - 2;
475 
476 	return ie;
477 }
478 
479 
480 /**
481  * wps_build_probe_req_ie - Build WPS IE for Probe Request
482  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
483  * most other use cases)
484  * @dev: Device attributes
485  * @uuid: Own UUID
486  * @req_type: Value for Request Type attribute
487  * @num_req_dev_types: Number of requested device types
488  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
489  *	%NULL if none
490  * Returns: WPS IE or %NULL on failure
491  *
492  * The caller is responsible for freeing the buffer.
493  */
wps_build_probe_req_ie(u16 pw_id,struct wps_device_data * dev,const u8 * uuid,enum wps_request_type req_type,unsigned int num_req_dev_types,const u8 * req_dev_types)494 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
495 				       const u8 *uuid,
496 				       enum wps_request_type req_type,
497 				       unsigned int num_req_dev_types,
498 				       const u8 *req_dev_types)
499 {
500 	struct wpabuf *ie;
501 
502 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
503 
504 	ie = wpabuf_alloc(500);
505 	if (ie == NULL)
506 		return NULL;
507 
508 	if (wps_build_version(ie) ||
509 	    wps_build_req_type(ie, req_type) ||
510 	    wps_build_config_methods(ie, dev->config_methods) ||
511 	    wps_build_uuid_e(ie, uuid) ||
512 	    wps_build_primary_dev_type(dev, ie) ||
513 	    wps_build_rf_bands(dev, ie, 0) ||
514 	    wps_build_assoc_state(NULL, ie) ||
515 	    wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
516 	    wps_build_dev_password_id(ie, pw_id) ||
517 	    wps_build_manufacturer(dev, ie) ||
518 	    wps_build_model_name(dev, ie) ||
519 	    wps_build_model_number(dev, ie) ||
520 	    wps_build_dev_name(dev, ie) ||
521 	    wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0, 0) ||
522 	    wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
523 	    ||
524 	    wps_build_secondary_dev_type(dev, ie)
525 		) {
526 		wpabuf_free(ie);
527 		return NULL;
528 	}
529 
530 	return wps_ie_encapsulate(ie);
531 }
532 
533 
wps_free_pending_msgs(struct upnp_pending_message * msgs)534 void wps_free_pending_msgs(struct upnp_pending_message *msgs)
535 {
536 	struct upnp_pending_message *p, *prev;
537 	p = msgs;
538 	while (p) {
539 		prev = p;
540 		p = p->next;
541 		wpabuf_free(prev->msg);
542 		os_free(prev);
543 	}
544 }
545 
546 
wps_attr_text(struct wpabuf * data,char * buf,char * end)547 int wps_attr_text(struct wpabuf *data, char *buf, char *end)
548 {
549 	struct wps_parse_attr attr;
550 	char *pos = buf;
551 	int ret;
552 
553 	if (wps_parse_msg(data, &attr) < 0)
554 		return -1;
555 
556 	if (attr.wps_state) {
557 		if (*attr.wps_state == WPS_STATE_NOT_CONFIGURED)
558 			ret = os_snprintf(pos, end - pos,
559 					  "wps_state=unconfigured\n");
560 		else if (*attr.wps_state == WPS_STATE_CONFIGURED)
561 			ret = os_snprintf(pos, end - pos,
562 					  "wps_state=configured\n");
563 		else
564 			ret = 0;
565 		if (os_snprintf_error(end - pos, ret))
566 			return pos - buf;
567 		pos += ret;
568 	}
569 
570 	if (attr.ap_setup_locked && *attr.ap_setup_locked) {
571 		ret = os_snprintf(pos, end - pos,
572 				  "wps_ap_setup_locked=1\n");
573 		if (os_snprintf_error(end - pos, ret))
574 			return pos - buf;
575 		pos += ret;
576 	}
577 
578 	if (attr.selected_registrar && *attr.selected_registrar) {
579 		ret = os_snprintf(pos, end - pos,
580 				  "wps_selected_registrar=1\n");
581 		if (os_snprintf_error(end - pos, ret))
582 			return pos - buf;
583 		pos += ret;
584 	}
585 
586 	if (attr.dev_password_id) {
587 		ret = os_snprintf(pos, end - pos,
588 				  "wps_device_password_id=%u\n",
589 				  WPA_GET_BE16(attr.dev_password_id));
590 		if (os_snprintf_error(end - pos, ret))
591 			return pos - buf;
592 		pos += ret;
593 	}
594 
595 	if (attr.sel_reg_config_methods) {
596 		ret = os_snprintf(pos, end - pos,
597 				  "wps_selected_registrar_config_methods="
598 				  "0x%04x\n",
599 				  WPA_GET_BE16(attr.sel_reg_config_methods));
600 		if (os_snprintf_error(end - pos, ret))
601 			return pos - buf;
602 		pos += ret;
603 	}
604 
605 	if (attr.primary_dev_type) {
606 		char devtype[WPS_DEV_TYPE_BUFSIZE];
607 		ret = os_snprintf(pos, end - pos,
608 				  "wps_primary_device_type=%s\n",
609 				  wps_dev_type_bin2str(attr.primary_dev_type,
610 						       devtype,
611 						       sizeof(devtype)));
612 		if (os_snprintf_error(end - pos, ret))
613 			return pos - buf;
614 		pos += ret;
615 	}
616 
617 	if (attr.dev_name) {
618 		char *str = os_malloc(attr.dev_name_len + 1);
619 		size_t i;
620 		if (str == NULL)
621 			return pos - buf;
622 		for (i = 0; i < attr.dev_name_len; i++) {
623 			if (attr.dev_name[i] == 0 ||
624 			    is_ctrl_char(attr.dev_name[i]))
625 				str[i] = '_';
626 			else
627 				str[i] = attr.dev_name[i];
628 		}
629 		str[i] = '\0';
630 		ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
631 		os_free(str);
632 		if (os_snprintf_error(end - pos, ret))
633 			return pos - buf;
634 		pos += ret;
635 	}
636 
637 	if (attr.config_methods) {
638 		ret = os_snprintf(pos, end - pos,
639 				  "wps_config_methods=0x%04x\n",
640 				  WPA_GET_BE16(attr.config_methods));
641 		if (os_snprintf_error(end - pos, ret))
642 			return pos - buf;
643 		pos += ret;
644 	}
645 
646 	return pos - buf;
647 }
648 
649 
wps_ei_str(enum wps_error_indication ei)650 const char * wps_ei_str(enum wps_error_indication ei)
651 {
652 	switch (ei) {
653 	case WPS_EI_NO_ERROR:
654 		return "No Error";
655 	case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
656 		return "TKIP Only Prohibited";
657 	case WPS_EI_SECURITY_WEP_PROHIBITED:
658 		return "WEP Prohibited";
659 	case WPS_EI_AUTH_FAILURE:
660 		return "Authentication Failure";
661 	default:
662 		return "Unknown";
663 	}
664 }
665