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      1 /*
      2  * Wi-Fi Protected Setup
      3  * Copyright (c) 2007-2009, Jouni Malinen <j (at) 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_stub_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  */
     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 	data->multi_ap_profile = cfg->multi_ap_profile;
    150 
    151 	return data;
    152 }
    153 
    154 
    155 /**
    156  * wps_deinit - Deinitialize WPS Registration protocol data
    157  * @data: WPS Registration protocol data from wps_init()
    158  */
    159 void wps_deinit(struct wps_data *data)
    160 {
    161 #ifdef CONFIG_WPS_NFC
    162 	if (data->registrar && data->nfc_pw_token)
    163 		wps_registrar_remove_nfc_pw_token(data->wps->registrar,
    164 						  data->nfc_pw_token);
    165 #endif /* CONFIG_WPS_NFC */
    166 
    167 	if (data->wps_pin_revealed) {
    168 		wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
    169 			   "negotiation failed");
    170 		if (data->registrar)
    171 			wps_registrar_invalidate_pin(data->wps->registrar,
    172 						     data->uuid_e);
    173 	} else if (data->registrar)
    174 		wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
    175 
    176 	wpabuf_clear_free(data->dh_privkey);
    177 	wpabuf_free(data->dh_pubkey_e);
    178 	wpabuf_free(data->dh_pubkey_r);
    179 	wpabuf_free(data->last_msg);
    180 	bin_clear_free(data->dev_password, data->dev_password_len);
    181 	bin_clear_free(data->alt_dev_password, data->alt_dev_password_len);
    182 	bin_clear_free(data->new_psk, data->new_psk_len);
    183 	wps_device_data_free(&data->peer_dev);
    184 	bin_clear_free(data->new_ap_settings, sizeof(*data->new_ap_settings));
    185 	dh5_free(data->dh_ctx);
    186 	os_free(data);
    187 }
    188 
    189 
    190 /**
    191  * wps_process_msg - Process a WPS message
    192  * @wps: WPS Registration protocol data from wps_init()
    193  * @op_code: Message OP Code
    194  * @msg: Message data
    195  * Returns: Processing result
    196  *
    197  * This function is used to process WPS messages with OP Codes WSC_ACK,
    198  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
    199  * responsible for reassembling the messages before calling this function.
    200  * Response to this message is built by calling wps_get_msg().
    201  */
    202 enum wps_process_res wps_process_msg(struct wps_data *wps,
    203 				     enum wsc_op_code op_code,
    204 				     const struct wpabuf *msg)
    205 {
    206 	if (wps->registrar)
    207 		return wps_registrar_process_msg(wps, op_code, msg);
    208 	else
    209 		return wps_enrollee_process_msg(wps, op_code, msg);
    210 }
    211 
    212 
    213 /**
    214  * wps_get_msg - Build a WPS message
    215  * @wps: WPS Registration protocol data from wps_init()
    216  * @op_code: Buffer for returning message OP Code
    217  * Returns: The generated WPS message or %NULL on failure
    218  *
    219  * This function is used to build a response to a message processed by calling
    220  * wps_process_msg(). The caller is responsible for freeing the buffer.
    221  */
    222 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
    223 {
    224 	if (wps->registrar)
    225 		return wps_registrar_get_msg(wps, op_code);
    226 	else
    227 		return wps_enrollee_get_msg(wps, op_code);
    228 }
    229 
    230 
    231 /**
    232  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
    233  * @msg: WPS IE contents from Beacon or Probe Response frame
    234  * Returns: 1 if PBC Registrar is active, 0 if not
    235  */
    236 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
    237 {
    238 	struct wps_parse_attr attr;
    239 
    240 	/*
    241 	 * In theory, this could also verify that attr.sel_reg_config_methods
    242 	 * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
    243 	 * do not set Selected Registrar Config Methods attribute properly, so
    244 	 * it is safer to just use Device Password ID here.
    245 	 */
    246 
    247 	if (wps_parse_msg(msg, &attr) < 0 ||
    248 	    !attr.selected_registrar || *attr.selected_registrar == 0 ||
    249 	    !attr.dev_password_id ||
    250 	    WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
    251 		return 0;
    252 
    253 #ifdef CONFIG_WPS_STRICT
    254 	if (!attr.sel_reg_config_methods ||
    255 	    !(WPA_GET_BE16(attr.sel_reg_config_methods) &
    256 	      WPS_CONFIG_PUSHBUTTON))
    257 		return 0;
    258 #endif /* CONFIG_WPS_STRICT */
    259 
    260 	return 1;
    261 }
    262 
    263 
    264 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
    265 {
    266 	/*
    267 	 * In theory, this could also verify that attr.sel_reg_config_methods
    268 	 * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
    269 	 * but some deployed AP implementations do not set Selected Registrar
    270 	 * Config Methods attribute properly, so it is safer to just use
    271 	 * Device Password ID here.
    272 	 */
    273 
    274 	if (!attr->selected_registrar || *attr->selected_registrar == 0)
    275 		return 0;
    276 
    277 	if (attr->dev_password_id != NULL &&
    278 	    WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
    279 		return 0;
    280 
    281 #ifdef CONFIG_WPS_STRICT
    282 	if (!attr->sel_reg_config_methods ||
    283 	    !(WPA_GET_BE16(attr->sel_reg_config_methods) &
    284 	      (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
    285 		return 0;
    286 #endif /* CONFIG_WPS_STRICT */
    287 
    288 	return 1;
    289 }
    290 
    291 
    292 /**
    293  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
    294  * @msg: WPS IE contents from Beacon or Probe Response frame
    295  * Returns: 1 if PIN Registrar is active, 0 if not
    296  */
    297 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
    298 {
    299 	struct wps_parse_attr attr;
    300 
    301 	if (wps_parse_msg(msg, &attr) < 0)
    302 		return 0;
    303 
    304 	return is_selected_pin_registrar(&attr);
    305 }
    306 
    307 
    308 /**
    309  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
    310  * @msg: WPS IE contents from Beacon or Probe Response frame
    311  * @addr: MAC address to search for
    312  * @ver1_compat: Whether to use version 1 compatibility mode
    313  * Returns: 2 if the specified address is explicit authorized, 1 if address is
    314  * authorized (broadcast), 0 if not
    315  */
    316 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
    317 			   int ver1_compat)
    318 {
    319 	struct wps_parse_attr attr;
    320 	unsigned int i;
    321 	const u8 *pos;
    322 	const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
    323 
    324 	if (wps_parse_msg(msg, &attr) < 0)
    325 		return 0;
    326 
    327 	if (!attr.version2 && ver1_compat) {
    328 		/*
    329 		 * Version 1.0 AP - AuthorizedMACs not used, so revert back to
    330 		 * old mechanism of using SelectedRegistrar.
    331 		 */
    332 		return is_selected_pin_registrar(&attr);
    333 	}
    334 
    335 	if (!attr.authorized_macs)
    336 		return 0;
    337 
    338 	pos = attr.authorized_macs;
    339 	for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
    340 		if (ether_addr_equal(pos, addr))
    341 			return 2;
    342 		if (ether_addr_equal(pos, bcast))
    343 			return 1;
    344 		pos += ETH_ALEN;
    345 	}
    346 
    347 	return 0;
    348 }
    349 
    350 
    351 /**
    352  * wps_ap_priority_compar - Prioritize WPS IE from two APs
    353  * @wps_a: WPS IE contents from Beacon or Probe Response frame
    354  * @wps_b: WPS IE contents from Beacon or Probe Response frame
    355  * Returns: 1 if wps_b is considered more likely selection for WPS
    356  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
    357  */
    358 int wps_ap_priority_compar(const struct wpabuf *wps_a,
    359 			   const struct wpabuf *wps_b)
    360 {
    361 	struct wps_parse_attr attr;
    362 	int sel_a, sel_b;
    363 
    364 	if (wps_a == NULL || wps_parse_msg(wps_a, &attr) < 0)
    365 		return 1;
    366 	sel_a = attr.selected_registrar && *attr.selected_registrar != 0;
    367 
    368 	if (wps_b == NULL || wps_parse_msg(wps_b, &attr) < 0)
    369 		return -1;
    370 	sel_b = attr.selected_registrar && *attr.selected_registrar != 0;
    371 
    372 	if (sel_a && !sel_b)
    373 		return -1;
    374 	if (!sel_a && sel_b)
    375 		return 1;
    376 
    377 	return 0;
    378 }
    379 
    380 
    381 /**
    382  * wps_get_uuid_e - Get UUID-E from WPS IE
    383  * @msg: WPS IE contents from Beacon or Probe Response frame
    384  * Returns: Pointer to UUID-E or %NULL if not included
    385  *
    386  * The returned pointer is to the msg contents and it remains valid only as
    387  * long as the msg buffer is valid.
    388  */
    389 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
    390 {
    391 	struct wps_parse_attr attr;
    392 
    393 	if (wps_parse_msg(msg, &attr) < 0)
    394 		return NULL;
    395 	return attr.uuid_e;
    396 }
    397 
    398 
    399 /**
    400  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
    401  */
    402 int wps_is_20(const struct wpabuf *msg)
    403 {
    404 	struct wps_parse_attr attr;
    405 
    406 	if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
    407 		return 0;
    408 	return attr.version2 != NULL;
    409 }
    410 
    411 
    412 /**
    413  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
    414  * @req_type: Value for Request Type attribute
    415  * Returns: WPS IE or %NULL on failure
    416  *
    417  * The caller is responsible for freeing the buffer.
    418  */
    419 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
    420 {
    421 	struct wpabuf *ie;
    422 	u8 *len;
    423 
    424 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
    425 		   "Request");
    426 	ie = wpabuf_alloc(100);
    427 	if (ie == NULL)
    428 		return NULL;
    429 
    430 	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
    431 	len = wpabuf_put(ie, 1);
    432 	wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
    433 
    434 	if (wps_build_version(ie) ||
    435 	    wps_build_req_type(ie, req_type) ||
    436 	    wps_build_wfa_ext(ie, 0, NULL, 0, 0)) {
    437 		wpabuf_free(ie);
    438 		return NULL;
    439 	}
    440 
    441 	*len = wpabuf_len(ie) - 2;
    442 
    443 	return ie;
    444 }
    445 
    446 
    447 /**
    448  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
    449  * Returns: WPS IE or %NULL on failure
    450  *
    451  * The caller is responsible for freeing the buffer.
    452  */
    453 struct wpabuf * wps_build_assoc_resp_ie(void)
    454 {
    455 	struct wpabuf *ie;
    456 	u8 *len;
    457 
    458 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
    459 		   "Response");
    460 	ie = wpabuf_alloc(100);
    461 	if (ie == NULL)
    462 		return NULL;
    463 
    464 	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
    465 	len = wpabuf_put(ie, 1);
    466 	wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
    467 
    468 	if (wps_build_version(ie) ||
    469 	    wps_build_resp_type(ie, WPS_RESP_AP) ||
    470 	    wps_build_wfa_ext(ie, 0, NULL, 0, 0)) {
    471 		wpabuf_free(ie);
    472 		return NULL;
    473 	}
    474 
    475 	*len = wpabuf_len(ie) - 2;
    476 
    477 	return ie;
    478 }
    479 
    480 
    481 /**
    482  * wps_build_probe_req_ie - Build WPS IE for Probe Request
    483  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
    484  * most other use cases)
    485  * @dev: Device attributes
    486  * @uuid: Own UUID
    487  * @req_type: Value for Request Type attribute
    488  * @num_req_dev_types: Number of requested device types
    489  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
    490  *	%NULL if none
    491  * Returns: WPS IE or %NULL on failure
    492  *
    493  * The caller is responsible for freeing the buffer.
    494  */
    495 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
    496 				       const u8 *uuid,
    497 				       enum wps_request_type req_type,
    498 				       unsigned int num_req_dev_types,
    499 				       const u8 *req_dev_types)
    500 {
    501 	struct wpabuf *ie;
    502 
    503 	wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
    504 
    505 	ie = wpabuf_alloc(500);
    506 	if (ie == NULL)
    507 		return NULL;
    508 
    509 	if (wps_build_version(ie) ||
    510 	    wps_build_req_type(ie, req_type) ||
    511 	    wps_build_config_methods(ie, dev->config_methods) ||
    512 	    wps_build_uuid_e(ie, uuid) ||
    513 	    wps_build_primary_dev_type(dev, ie) ||
    514 	    wps_build_rf_bands(dev, ie, 0) ||
    515 	    wps_build_assoc_state(NULL, ie) ||
    516 	    wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
    517 	    wps_build_dev_password_id(ie, pw_id) ||
    518 	    wps_build_manufacturer(dev, ie) ||
    519 	    wps_build_model_name(dev, ie) ||
    520 	    wps_build_model_number(dev, ie) ||
    521 	    wps_build_dev_name(dev, ie) ||
    522 	    wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0, 0) ||
    523 	    wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
    524 	    ||
    525 	    wps_build_secondary_dev_type(dev, ie)
    526 		) {
    527 		wpabuf_free(ie);
    528 		return NULL;
    529 	}
    530 
    531 	return wps_ie_encapsulate(ie);
    532 }
    533 
    534 
    535 void wps_free_pending_msgs(struct upnp_pending_message *msgs)
    536 {
    537 	struct upnp_pending_message *p, *prev;
    538 	p = msgs;
    539 	while (p) {
    540 		prev = p;
    541 		p = p->next;
    542 		wpabuf_free(prev->msg);
    543 		os_free(prev);
    544 	}
    545 }
    546 
    547 
    548 int wps_attr_text(struct wpabuf *data, char *buf, char *end)
    549 {
    550 	struct wps_parse_attr attr;
    551 	char *pos = buf;
    552 	int ret;
    553 
    554 	if (wps_parse_msg(data, &attr) < 0)
    555 		return -1;
    556 
    557 	if (attr.wps_state) {
    558 		if (*attr.wps_state == WPS_STATE_NOT_CONFIGURED)
    559 			ret = os_snprintf(pos, end - pos,
    560 					  "wps_state=unconfigured\n");
    561 		else if (*attr.wps_state == WPS_STATE_CONFIGURED)
    562 			ret = os_snprintf(pos, end - pos,
    563 					  "wps_state=configured\n");
    564 		else
    565 			ret = 0;
    566 		if (os_snprintf_error(end - pos, ret))
    567 			return pos - buf;
    568 		pos += ret;
    569 	}
    570 
    571 	if (attr.ap_setup_locked && *attr.ap_setup_locked) {
    572 		ret = os_snprintf(pos, end - pos,
    573 				  "wps_ap_setup_locked=1\n");
    574 		if (os_snprintf_error(end - pos, ret))
    575 			return pos - buf;
    576 		pos += ret;
    577 	}
    578 
    579 	if (attr.selected_registrar && *attr.selected_registrar) {
    580 		ret = os_snprintf(pos, end - pos,
    581 				  "wps_selected_registrar=1\n");
    582 		if (os_snprintf_error(end - pos, ret))
    583 			return pos - buf;
    584 		pos += ret;
    585 	}
    586 
    587 	if (attr.dev_password_id) {
    588 		ret = os_snprintf(pos, end - pos,
    589 				  "wps_device_password_id=%u\n",
    590 				  WPA_GET_BE16(attr.dev_password_id));
    591 		if (os_snprintf_error(end - pos, ret))
    592 			return pos - buf;
    593 		pos += ret;
    594 	}
    595 
    596 	if (attr.sel_reg_config_methods) {
    597 		ret = os_snprintf(pos, end - pos,
    598 				  "wps_selected_registrar_config_methods="
    599 				  "0x%04x\n",
    600 				  WPA_GET_BE16(attr.sel_reg_config_methods));
    601 		if (os_snprintf_error(end - pos, ret))
    602 			return pos - buf;
    603 		pos += ret;
    604 	}
    605 
    606 	if (attr.primary_dev_type) {
    607 		char devtype[WPS_DEV_TYPE_BUFSIZE];
    608 		ret = os_snprintf(pos, end - pos,
    609 				  "wps_primary_device_type=%s\n",
    610 				  wps_dev_type_bin2str(attr.primary_dev_type,
    611 						       devtype,
    612 						       sizeof(devtype)));
    613 		if (os_snprintf_error(end - pos, ret))
    614 			return pos - buf;
    615 		pos += ret;
    616 	}
    617 
    618 	if (attr.dev_name) {
    619 		char *str = os_malloc(attr.dev_name_len + 1);
    620 		size_t i;
    621 		if (str == NULL)
    622 			return pos - buf;
    623 		for (i = 0; i < attr.dev_name_len; i++) {
    624 			if (attr.dev_name[i] == 0 ||
    625 			    is_ctrl_char(attr.dev_name[i]))
    626 				str[i] = '_';
    627 			else
    628 				str[i] = attr.dev_name[i];
    629 		}
    630 		str[i] = '\0';
    631 		ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
    632 		os_free(str);
    633 		if (os_snprintf_error(end - pos, ret))
    634 			return pos - buf;
    635 		pos += ret;
    636 	}
    637 
    638 	if (attr.config_methods) {
    639 		ret = os_snprintf(pos, end - pos,
    640 				  "wps_config_methods=0x%04x\n",
    641 				  WPA_GET_BE16(attr.config_methods));
    642 		if (os_snprintf_error(end - pos, ret))
    643 			return pos - buf;
    644 		pos += ret;
    645 	}
    646 
    647 	return pos - buf;
    648 }
    649 
    650 
    651 const char * wps_ei_str(enum wps_error_indication ei)
    652 {
    653 	switch (ei) {
    654 	case WPS_EI_NO_ERROR:
    655 		return "No Error";
    656 	case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
    657 		return "TKIP Only Prohibited";
    658 	case WPS_EI_SECURITY_WEP_PROHIBITED:
    659 		return "WEP Prohibited";
    660 	case WPS_EI_AUTH_FAILURE:
    661 		return "Authentication Failure";
    662 	default:
    663 		return "Unknown";
    664 	}
    665 }
    666