1 /*
2  * Wi-Fi Protected Setup - attribute building
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 "includes.h"
10 
11 #include "common.h"
12 #include "crypto/aes_wrap.h"
13 #include "crypto/crypto.h"
14 #include "crypto/dh_group5.h"
15 #include "crypto/sha256.h"
16 #include "crypto/random.h"
17 #include "common/ieee802_11_defs.h"
18 #include "wps_i.h"
19 
20 
wps_build_public_key(struct wps_data * wps,struct wpabuf * msg)21 int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg)
22 {
23 	struct wpabuf *pubkey = NULL;
24 
25 	wpa_printf(MSG_DEBUG, "WPS:  * Public Key");
26 	wpabuf_clear_free(wps->dh_privkey);
27 	wps->dh_privkey = NULL;
28 	if (wps->dev_pw_id != DEV_PW_DEFAULT && wps->wps->dh_privkey &&
29 	    wps->wps->dh_ctx) {
30 		wpa_printf(MSG_DEBUG, "WPS: Using pre-configured DH keys");
31 		if (wps->wps->dh_pubkey == NULL) {
32 			wpa_printf(MSG_DEBUG,
33 				   "WPS: wps->wps->dh_pubkey == NULL");
34 			return -1;
35 		}
36 		wps->dh_privkey = wpabuf_dup(wps->wps->dh_privkey);
37 		wps->dh_ctx = wps->wps->dh_ctx;
38 		wps->wps->dh_ctx = NULL;
39 		pubkey = wpabuf_dup(wps->wps->dh_pubkey);
40 #ifdef CONFIG_WPS_NFC
41 	} else if ((wps->dev_pw_id >= 0x10 ||
42 		    wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) &&
43 		   (wps->wps->ap ||
44 		    (wps->wps->ap_nfc_dh_pubkey &&
45 		     wps->wps->ap_nfc_dev_pw_id ==
46 		     DEV_PW_NFC_CONNECTION_HANDOVER &&
47 		     wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)) &&
48 		   (wps->dev_pw_id == wps->wps->ap_nfc_dev_pw_id ||
49 		    wps->wps->ap_nfc_dh_pubkey)) {
50 		wpa_printf(MSG_DEBUG, "WPS: Using NFC password token DH keys");
51 		if (wps->wps->ap_nfc_dh_privkey == NULL) {
52 			wpa_printf(MSG_DEBUG,
53 				   "WPS: wps->wps->ap_nfc_dh_privkey == NULL");
54 			return -1;
55 		}
56 		if (wps->wps->ap_nfc_dh_pubkey == NULL) {
57 			wpa_printf(MSG_DEBUG,
58 				   "WPS: wps->wps->ap_nfc_dh_pubkey == NULL");
59 			return -1;
60 		}
61 		wps->dh_privkey = wpabuf_dup(wps->wps->ap_nfc_dh_privkey);
62 		pubkey = wpabuf_dup(wps->wps->ap_nfc_dh_pubkey);
63 		if (wps->dh_privkey && pubkey)
64 			wps->dh_ctx = dh5_init_fixed(wps->dh_privkey, pubkey);
65 #endif /* CONFIG_WPS_NFC */
66 	} else {
67 		wpa_printf(MSG_DEBUG, "WPS: Generate new DH keys");
68 		dh5_free(wps->dh_ctx);
69 		wps->dh_ctx = dh5_init(&wps->dh_privkey, &pubkey);
70 		pubkey = wpabuf_zeropad(pubkey, 192);
71 	}
72 	if (wps->dh_ctx == NULL || wps->dh_privkey == NULL || pubkey == NULL) {
73 		wpa_printf(MSG_DEBUG, "WPS: Failed to initialize "
74 			   "Diffie-Hellman handshake");
75 		wpabuf_free(pubkey);
76 		return -1;
77 	}
78 	wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey);
79 	wpa_hexdump_buf(MSG_DEBUG, "WPS: DH own Public Key", pubkey);
80 
81 	wpabuf_put_be16(msg, ATTR_PUBLIC_KEY);
82 	wpabuf_put_be16(msg, wpabuf_len(pubkey));
83 	wpabuf_put_buf(msg, pubkey);
84 
85 	if (wps->registrar) {
86 		wpabuf_free(wps->dh_pubkey_r);
87 		wps->dh_pubkey_r = pubkey;
88 	} else {
89 		wpabuf_free(wps->dh_pubkey_e);
90 		wps->dh_pubkey_e = pubkey;
91 	}
92 
93 	return 0;
94 }
95 
96 
wps_build_req_type(struct wpabuf * msg,enum wps_request_type type)97 int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type)
98 {
99 	wpa_printf(MSG_DEBUG, "WPS:  * Request Type");
100 	wpabuf_put_be16(msg, ATTR_REQUEST_TYPE);
101 	wpabuf_put_be16(msg, 1);
102 	wpabuf_put_u8(msg, type);
103 	return 0;
104 }
105 
106 
wps_build_resp_type(struct wpabuf * msg,enum wps_response_type type)107 int wps_build_resp_type(struct wpabuf *msg, enum wps_response_type type)
108 {
109 	wpa_printf(MSG_DEBUG, "WPS:  * Response Type (%d)", type);
110 	wpabuf_put_be16(msg, ATTR_RESPONSE_TYPE);
111 	wpabuf_put_be16(msg, 1);
112 	wpabuf_put_u8(msg, type);
113 	return 0;
114 }
115 
116 
wps_build_config_methods(struct wpabuf * msg,u16 methods)117 int wps_build_config_methods(struct wpabuf *msg, u16 methods)
118 {
119 	wpa_printf(MSG_DEBUG, "WPS:  * Config Methods (%x)", methods);
120 	wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
121 	wpabuf_put_be16(msg, 2);
122 	wpabuf_put_be16(msg, methods);
123 	return 0;
124 }
125 
126 
wps_build_uuid_e(struct wpabuf * msg,const u8 * uuid)127 int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid)
128 {
129 	if (wpabuf_tailroom(msg) < 4 + WPS_UUID_LEN)
130 		return -1;
131 	wpa_printf(MSG_DEBUG, "WPS:  * UUID-E");
132 	wpabuf_put_be16(msg, ATTR_UUID_E);
133 	wpabuf_put_be16(msg, WPS_UUID_LEN);
134 	wpabuf_put_data(msg, uuid, WPS_UUID_LEN);
135 	return 0;
136 }
137 
138 
wps_build_dev_password_id(struct wpabuf * msg,u16 id)139 int wps_build_dev_password_id(struct wpabuf *msg, u16 id)
140 {
141 	wpa_printf(MSG_DEBUG, "WPS:  * Device Password ID (%d)", id);
142 	wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
143 	wpabuf_put_be16(msg, 2);
144 	wpabuf_put_be16(msg, id);
145 	return 0;
146 }
147 
148 
wps_build_config_error(struct wpabuf * msg,u16 err)149 int wps_build_config_error(struct wpabuf *msg, u16 err)
150 {
151 	wpa_printf(MSG_DEBUG, "WPS:  * Configuration Error (%d)", err);
152 	wpabuf_put_be16(msg, ATTR_CONFIG_ERROR);
153 	wpabuf_put_be16(msg, 2);
154 	wpabuf_put_be16(msg, err);
155 	return 0;
156 }
157 
158 
wps_build_authenticator(struct wps_data * wps,struct wpabuf * msg)159 int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg)
160 {
161 	u8 hash[SHA256_MAC_LEN];
162 	const u8 *addr[2];
163 	size_t len[2];
164 
165 	if (wps->last_msg == NULL) {
166 		wpa_printf(MSG_DEBUG, "WPS: Last message not available for "
167 			   "building authenticator");
168 		return -1;
169 	}
170 
171 	/* Authenticator = HMAC-SHA256_AuthKey(M_prev || M_curr*)
172 	 * (M_curr* is M_curr without the Authenticator attribute)
173 	 */
174 	addr[0] = wpabuf_head(wps->last_msg);
175 	len[0] = wpabuf_len(wps->last_msg);
176 	addr[1] = wpabuf_head(msg);
177 	len[1] = wpabuf_len(msg);
178 	if (hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 2, addr, len,
179 			       hash) < 0)
180 		return -1;
181 
182 	wpa_printf(MSG_DEBUG, "WPS:  * Authenticator");
183 	wpabuf_put_be16(msg, ATTR_AUTHENTICATOR);
184 	wpabuf_put_be16(msg, WPS_AUTHENTICATOR_LEN);
185 	wpabuf_put_data(msg, hash, WPS_AUTHENTICATOR_LEN);
186 
187 	return 0;
188 }
189 
190 
wps_build_version(struct wpabuf * msg)191 int wps_build_version(struct wpabuf *msg)
192 {
193 	/*
194 	 * Note: This attribute is deprecated and set to hardcoded 0x10 for
195 	 * backwards compatibility reasons. The real version negotiation is
196 	 * done with Version2.
197 	 */
198 	if (wpabuf_tailroom(msg) < 5)
199 		return -1;
200 	wpa_printf(MSG_DEBUG, "WPS:  * Version (hardcoded 0x10)");
201 	wpabuf_put_be16(msg, ATTR_VERSION);
202 	wpabuf_put_be16(msg, 1);
203 	wpabuf_put_u8(msg, 0x10);
204 	return 0;
205 }
206 
207 
wps_build_wfa_ext(struct wpabuf * msg,int req_to_enroll,const u8 * auth_macs,size_t auth_macs_count,u8 multi_ap_subelem)208 int wps_build_wfa_ext(struct wpabuf *msg, int req_to_enroll,
209 		      const u8 *auth_macs, size_t auth_macs_count,
210 		      u8 multi_ap_subelem)
211 {
212 	u8 *len;
213 
214 #ifdef CONFIG_WPS_TESTING
215 	if (WPS_VERSION == 0x10)
216 		return 0;
217 #endif /* CONFIG_WPS_TESTING */
218 
219 	if (wpabuf_tailroom(msg) <
220 	    7 + 3 + (req_to_enroll ? 3 : 0) +
221 	    (auth_macs ? 2 + auth_macs_count * ETH_ALEN : 0))
222 		return -1;
223 	wpabuf_put_be16(msg, ATTR_VENDOR_EXT);
224 	len = wpabuf_put(msg, 2); /* to be filled */
225 	wpabuf_put_be24(msg, WPS_VENDOR_ID_WFA);
226 
227 	wpa_printf(MSG_DEBUG, "WPS:  * Version2 (0x%x)", WPS_VERSION);
228 	wpabuf_put_u8(msg, WFA_ELEM_VERSION2);
229 	wpabuf_put_u8(msg, 1);
230 	wpabuf_put_u8(msg, WPS_VERSION);
231 
232 	if (req_to_enroll) {
233 		wpa_printf(MSG_DEBUG, "WPS:  * Request to Enroll (1)");
234 		wpabuf_put_u8(msg, WFA_ELEM_REQUEST_TO_ENROLL);
235 		wpabuf_put_u8(msg, 1);
236 		wpabuf_put_u8(msg, 1);
237 	}
238 
239 	if (auth_macs && auth_macs_count) {
240 		size_t i;
241 		wpa_printf(MSG_DEBUG, "WPS:  * AuthorizedMACs (count=%d)",
242 			   (int) auth_macs_count);
243 		wpabuf_put_u8(msg, WFA_ELEM_AUTHORIZEDMACS);
244 		wpabuf_put_u8(msg, auth_macs_count * ETH_ALEN);
245 		wpabuf_put_data(msg, auth_macs, auth_macs_count * ETH_ALEN);
246 		for (i = 0; i < auth_macs_count; i++)
247 			wpa_printf(MSG_DEBUG, "WPS:    AuthorizedMAC: " MACSTR,
248 				   MAC2STR(&auth_macs[i * ETH_ALEN]));
249 	}
250 
251 	if (multi_ap_subelem) {
252 		wpa_printf(MSG_DEBUG, "WPS:  * Multi-AP (0x%x)",
253 			   multi_ap_subelem);
254 		wpabuf_put_u8(msg, WFA_ELEM_MULTI_AP);
255 		wpabuf_put_u8(msg, 1); /* length */
256 		wpabuf_put_u8(msg, multi_ap_subelem);
257 	}
258 
259 	WPA_PUT_BE16(len, (u8 *) wpabuf_put(msg, 0) - len - 2);
260 
261 #ifdef CONFIG_WPS_TESTING
262 	if (WPS_VERSION > 0x20) {
263 		if (wpabuf_tailroom(msg) < 5)
264 			return -1;
265 		wpa_printf(MSG_DEBUG, "WPS:  * Extensibility Testing - extra "
266 			   "attribute");
267 		wpabuf_put_be16(msg, ATTR_EXTENSIBILITY_TEST);
268 		wpabuf_put_be16(msg, 1);
269 		wpabuf_put_u8(msg, 42);
270 	}
271 #endif /* CONFIG_WPS_TESTING */
272 	return 0;
273 }
274 
275 
wps_build_msg_type(struct wpabuf * msg,enum wps_msg_type msg_type)276 int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type)
277 {
278 	wpa_printf(MSG_DEBUG, "WPS:  * Message Type (%d)", msg_type);
279 	wpabuf_put_be16(msg, ATTR_MSG_TYPE);
280 	wpabuf_put_be16(msg, 1);
281 	wpabuf_put_u8(msg, msg_type);
282 	return 0;
283 }
284 
285 
wps_build_enrollee_nonce(struct wps_data * wps,struct wpabuf * msg)286 int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg)
287 {
288 	wpa_printf(MSG_DEBUG, "WPS:  * Enrollee Nonce");
289 	wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
290 	wpabuf_put_be16(msg, WPS_NONCE_LEN);
291 	wpabuf_put_data(msg, wps->nonce_e, WPS_NONCE_LEN);
292 	return 0;
293 }
294 
295 
wps_build_registrar_nonce(struct wps_data * wps,struct wpabuf * msg)296 int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg)
297 {
298 	wpa_printf(MSG_DEBUG, "WPS:  * Registrar Nonce");
299 	wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
300 	wpabuf_put_be16(msg, WPS_NONCE_LEN);
301 	wpabuf_put_data(msg, wps->nonce_r, WPS_NONCE_LEN);
302 	return 0;
303 }
304 
305 
wps_build_auth_type_flags(struct wps_data * wps,struct wpabuf * msg)306 int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg)
307 {
308 	u16 auth_types = WPS_AUTH_TYPES;
309 	/* WPA/WPA2-Enterprise enrollment not supported through WPS */
310 	auth_types &= ~WPS_AUTH_WPA;
311 	auth_types &= ~WPS_AUTH_WPA2;
312 	auth_types &= ~WPS_AUTH_SHARED;
313 #ifdef CONFIG_NO_TKIP
314 	auth_types &= ~WPS_AUTH_WPAPSK;
315 #endif /* CONFIG_NO_TKIP */
316 #ifdef CONFIG_WPS_TESTING
317 	if (wps_force_auth_types_in_use) {
318 		wpa_printf(MSG_DEBUG,
319 			   "WPS: Testing - replace auth type 0x%x with 0x%x",
320 			   auth_types, wps_force_auth_types);
321 		auth_types = wps_force_auth_types;
322 	}
323 #endif /* CONFIG_WPS_TESTING */
324 	wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type Flags (0x%x)",
325 		   auth_types);
326 	wpabuf_put_be16(msg, ATTR_AUTH_TYPE_FLAGS);
327 	wpabuf_put_be16(msg, 2);
328 	wpabuf_put_be16(msg, auth_types);
329 	return 0;
330 }
331 
332 
wps_build_encr_type_flags(struct wps_data * wps,struct wpabuf * msg)333 int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg)
334 {
335 	u16 encr_types = WPS_ENCR_TYPES;
336 	encr_types &= ~WPS_ENCR_WEP;
337 #ifdef CONFIG_NO_TKIP
338 	encr_types &= ~WPS_ENCR_TKIP;
339 #endif /* CONFIG_NO_TKIP */
340 #ifdef CONFIG_WPS_TESTING
341 	if (wps_force_encr_types_in_use) {
342 		wpa_printf(MSG_DEBUG,
343 			   "WPS: Testing - replace encr type 0x%x with 0x%x",
344 			   encr_types, wps_force_encr_types);
345 		encr_types = wps_force_encr_types;
346 	}
347 #endif /* CONFIG_WPS_TESTING */
348 	wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type Flags (0x%x)",
349 		   encr_types);
350 	wpabuf_put_be16(msg, ATTR_ENCR_TYPE_FLAGS);
351 	wpabuf_put_be16(msg, 2);
352 	wpabuf_put_be16(msg, encr_types);
353 	return 0;
354 }
355 
356 
wps_build_conn_type_flags(struct wps_data * wps,struct wpabuf * msg)357 int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg)
358 {
359 	wpa_printf(MSG_DEBUG, "WPS:  * Connection Type Flags");
360 	wpabuf_put_be16(msg, ATTR_CONN_TYPE_FLAGS);
361 	wpabuf_put_be16(msg, 1);
362 	wpabuf_put_u8(msg, WPS_CONN_ESS);
363 	return 0;
364 }
365 
366 
wps_build_assoc_state(struct wps_data * wps,struct wpabuf * msg)367 int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg)
368 {
369 	wpa_printf(MSG_DEBUG, "WPS:  * Association State");
370 	wpabuf_put_be16(msg, ATTR_ASSOC_STATE);
371 	wpabuf_put_be16(msg, 2);
372 	wpabuf_put_be16(msg, WPS_ASSOC_NOT_ASSOC);
373 	return 0;
374 }
375 
376 
wps_build_key_wrap_auth(struct wps_data * wps,struct wpabuf * msg)377 int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg)
378 {
379 	u8 hash[SHA256_MAC_LEN];
380 
381 	wpa_printf(MSG_DEBUG, "WPS:  * Key Wrap Authenticator");
382 	if (hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, wpabuf_head(msg),
383 			wpabuf_len(msg), hash) < 0)
384 		return -1;
385 
386 	wpabuf_put_be16(msg, ATTR_KEY_WRAP_AUTH);
387 	wpabuf_put_be16(msg, WPS_KWA_LEN);
388 	wpabuf_put_data(msg, hash, WPS_KWA_LEN);
389 	return 0;
390 }
391 
392 
wps_build_encr_settings(struct wps_data * wps,struct wpabuf * msg,struct wpabuf * plain)393 int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
394 			    struct wpabuf *plain)
395 {
396 	size_t pad_len;
397 	const size_t block_size = 16;
398 	u8 *iv, *data;
399 
400 	wpa_printf(MSG_DEBUG, "WPS:  * Encrypted Settings");
401 
402 	/* PKCS#5 v2.0 pad */
403 	pad_len = block_size - wpabuf_len(plain) % block_size;
404 	os_memset(wpabuf_put(plain, pad_len), pad_len, pad_len);
405 
406 	wpabuf_put_be16(msg, ATTR_ENCR_SETTINGS);
407 	wpabuf_put_be16(msg, block_size + wpabuf_len(plain));
408 
409 	iv = wpabuf_put(msg, block_size);
410 	if (random_get_bytes(iv, block_size) < 0)
411 		return -1;
412 
413 	data = wpabuf_put(msg, 0);
414 	wpabuf_put_buf(msg, plain);
415 	if (aes_128_cbc_encrypt(wps->keywrapkey, iv, data, wpabuf_len(plain)))
416 		return -1;
417 
418 	return 0;
419 }
420 
421 
422 #ifdef CONFIG_WPS_OOB
wps_build_oob_dev_pw(struct wpabuf * msg,u16 dev_pw_id,const struct wpabuf * pubkey,const u8 * dev_pw,size_t dev_pw_len)423 int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
424 			 const struct wpabuf *pubkey, const u8 *dev_pw,
425 			 size_t dev_pw_len)
426 {
427 	size_t hash_len;
428 	const u8 *addr[1];
429 	u8 pubkey_hash[WPS_HASH_LEN];
430 
431 	wpa_printf(MSG_DEBUG, "WPS:  * OOB Device Password (dev_pw_id=%u)",
432 		   dev_pw_id);
433 	addr[0] = wpabuf_head(pubkey);
434 	hash_len = wpabuf_len(pubkey);
435 	if (sha256_vector(1, addr, &hash_len, pubkey_hash) < 0)
436 		return -1;
437 #ifdef CONFIG_WPS_TESTING
438 	if (wps_corrupt_pkhash) {
439 		wpa_hexdump(MSG_DEBUG, "WPS: Real Public Key Hash",
440 			    pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
441 		wpa_printf(MSG_INFO, "WPS: Testing - corrupt public key hash");
442 		pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN - 2]++;
443 	}
444 #endif /* CONFIG_WPS_TESTING */
445 
446 	wpabuf_put_be16(msg, ATTR_OOB_DEVICE_PASSWORD);
447 	wpabuf_put_be16(msg, WPS_OOB_PUBKEY_HASH_LEN + 2 + dev_pw_len);
448 	wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
449 		    pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
450 	wpabuf_put_data(msg, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
451 	wpabuf_put_be16(msg, dev_pw_id);
452 	if (dev_pw) {
453 		wpa_hexdump_key(MSG_DEBUG, "WPS: OOB Device Password",
454 				dev_pw, dev_pw_len);
455 		wpabuf_put_data(msg, dev_pw, dev_pw_len);
456 	}
457 
458 	return 0;
459 }
460 #endif /* CONFIG_WPS_OOB */
461 
462 
463 /* Encapsulate WPS IE data with one (or more, if needed) IE headers */
wps_ie_encapsulate(struct wpabuf * data)464 struct wpabuf * wps_ie_encapsulate(struct wpabuf *data)
465 {
466 	struct wpabuf *ie;
467 	const u8 *pos, *end;
468 
469 	ie = wpabuf_alloc(wpabuf_len(data) + 100);
470 	if (ie == NULL) {
471 		wpabuf_free(data);
472 		return NULL;
473 	}
474 
475 	pos = wpabuf_head(data);
476 	end = pos + wpabuf_len(data);
477 
478 	while (end > pos) {
479 		size_t frag_len = end - pos;
480 		if (frag_len > 251)
481 			frag_len = 251;
482 		wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
483 		wpabuf_put_u8(ie, 4 + frag_len);
484 		wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
485 		wpabuf_put_data(ie, pos, frag_len);
486 		pos += frag_len;
487 	}
488 
489 	wpabuf_free(data);
490 
491 	return ie;
492 }
493 
494 
wps_build_mac_addr(struct wpabuf * msg,const u8 * addr)495 int wps_build_mac_addr(struct wpabuf *msg, const u8 *addr)
496 {
497 	wpa_printf(MSG_DEBUG, "WPS:  * MAC Address (" MACSTR ")",
498 		   MAC2STR(addr));
499 	wpabuf_put_be16(msg, ATTR_MAC_ADDR);
500 	wpabuf_put_be16(msg, ETH_ALEN);
501 	wpabuf_put_data(msg, addr, ETH_ALEN);
502 	return 0;
503 }
504 
505 
wps_build_rf_bands_attr(struct wpabuf * msg,u8 rf_bands)506 int wps_build_rf_bands_attr(struct wpabuf *msg, u8 rf_bands)
507 {
508 	wpa_printf(MSG_DEBUG, "WPS:  * RF Bands (%x)", rf_bands);
509 	wpabuf_put_be16(msg, ATTR_RF_BANDS);
510 	wpabuf_put_be16(msg, 1);
511 	wpabuf_put_u8(msg, rf_bands);
512 	return 0;
513 }
514 
515 
wps_build_ap_channel(struct wpabuf * msg,u16 ap_channel)516 int wps_build_ap_channel(struct wpabuf *msg, u16 ap_channel)
517 {
518 	wpa_printf(MSG_DEBUG, "WPS:  * AP Channel (%u)", ap_channel);
519 	wpabuf_put_be16(msg, ATTR_AP_CHANNEL);
520 	wpabuf_put_be16(msg, 2);
521 	wpabuf_put_be16(msg, ap_channel);
522 	return 0;
523 }
524