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Reduce differences between our VKERNEL and VKERNEL64 configurations.
[dragonfly.git] / contrib / hostapd / src / wps / wps_enrollee.c
blob5cb3e1e011a069bf573a6e8f51f6293f499a67cd
1 /*
2 * Wi-Fi Protected Setup - Enrollee
3 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "sha256.h"
19 #include "wps_i.h"
20 #include "wps_dev_attr.h"
21
22
23 static int wps_build_mac_addr(struct wps_data *wps, struct wpabuf *msg)
24 {
25 wpa_printf(MSG_DEBUG, "WPS: * MAC Address");
26 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
27 wpabuf_put_be16(msg, ETH_ALEN);
28 wpabuf_put_data(msg, wps->mac_addr_e, ETH_ALEN);
29 return 0;
30 }
31
32
33 static int wps_build_wps_state(struct wps_data *wps, struct wpabuf *msg)
34 {
35 u8 state;
36 if (wps->wps->ap)
37 state = wps->wps->wps_state;
38 else
39 state = WPS_STATE_NOT_CONFIGURED;
40 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
41 state);
42 wpabuf_put_be16(msg, ATTR_WPS_STATE);
43 wpabuf_put_be16(msg, 1);
44 wpabuf_put_u8(msg, state);
45 return 0;
46 }
47
48
49 static int wps_build_e_hash(struct wps_data *wps, struct wpabuf *msg)
50 {
51 u8 *hash;
52 const u8 *addr[4];
53 size_t len[4];
54
55 if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
56 return -1;
57 wpa_hexdump(MSG_DEBUG, "WPS: E-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
58 wpa_hexdump(MSG_DEBUG, "WPS: E-S2",
59 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
60
61 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
62 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
63 "E-Hash derivation");
64 return -1;
65 }
66
67 wpa_printf(MSG_DEBUG, "WPS: * E-Hash1");
68 wpabuf_put_be16(msg, ATTR_E_HASH1);
69 wpabuf_put_be16(msg, SHA256_MAC_LEN);
70 hash = wpabuf_put(msg, SHA256_MAC_LEN);
71 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
72 addr[0] = wps->snonce;
73 len[0] = WPS_SECRET_NONCE_LEN;
74 addr[1] = wps->psk1;
75 len[1] = WPS_PSK_LEN;
76 addr[2] = wpabuf_head(wps->dh_pubkey_e);
77 len[2] = wpabuf_len(wps->dh_pubkey_e);
78 addr[3] = wpabuf_head(wps->dh_pubkey_r);
79 len[3] = wpabuf_len(wps->dh_pubkey_r);
80 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
81 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", hash, SHA256_MAC_LEN);
82
83 wpa_printf(MSG_DEBUG, "WPS: * E-Hash2");
84 wpabuf_put_be16(msg, ATTR_E_HASH2);
85 wpabuf_put_be16(msg, SHA256_MAC_LEN);
86 hash = wpabuf_put(msg, SHA256_MAC_LEN);
87 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
88 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
89 addr[1] = wps->psk2;
90 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
91 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", hash, SHA256_MAC_LEN);
92
93 return 0;
94 }
95
96
97 static int wps_build_e_snonce1(struct wps_data *wps, struct wpabuf *msg)
98 {
99 wpa_printf(MSG_DEBUG, "WPS: * E-SNonce1");
100 wpabuf_put_be16(msg, ATTR_E_SNONCE1);
101 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
102 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
103 return 0;
104 }
105
106
107 static int wps_build_e_snonce2(struct wps_data *wps, struct wpabuf *msg)
108 {
109 wpa_printf(MSG_DEBUG, "WPS: * E-SNonce2");
110 wpabuf_put_be16(msg, ATTR_E_SNONCE2);
111 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
112 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
113 WPS_SECRET_NONCE_LEN);
114 return 0;
115 }
116
117
118 static struct wpabuf * wps_build_m1(struct wps_data *wps)
119 {
120 struct wpabuf *msg;
121 u16 methods;
122
123 if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
124 return NULL;
125 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
126 wps->nonce_e, WPS_NONCE_LEN);
127
128 wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
129 msg = wpabuf_alloc(1000);
130 if (msg == NULL)
131 return NULL;
132
133 methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
134 if (wps->pbc)
135 methods |= WPS_CONFIG_PUSHBUTTON;
136
137 if (wps_build_version(msg) ||
138 wps_build_msg_type(msg, WPS_M1) ||
139 wps_build_uuid_e(msg, wps->uuid_e) ||
140 wps_build_mac_addr(wps, msg) ||
141 wps_build_enrollee_nonce(wps, msg) ||
142 wps_build_public_key(wps, msg) ||
143 wps_build_auth_type_flags(wps, msg) ||
144 wps_build_encr_type_flags(wps, msg) ||
145 wps_build_conn_type_flags(wps, msg) ||
146 wps_build_config_methods(msg, methods) ||
147 wps_build_wps_state(wps, msg) ||
148 wps_build_device_attrs(&wps->wps->dev, msg) ||
149 wps_build_rf_bands(&wps->wps->dev, msg) ||
150 wps_build_assoc_state(wps, msg) ||
151 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
152 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
153 wps_build_os_version(&wps->wps->dev, msg)) {
154 wpabuf_free(msg);
155 return NULL;
156 }
157
158 wps->state = RECV_M2;
159 return msg;
160 }
161
162
163 static struct wpabuf * wps_build_m3(struct wps_data *wps)
164 {
165 struct wpabuf *msg;
166
167 wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
168
169 if (wps->dev_password == NULL) {
170 wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
171 return NULL;
172 }
173 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
174
175 msg = wpabuf_alloc(1000);
176 if (msg == NULL)
177 return NULL;
178
179 if (wps_build_version(msg) ||
180 wps_build_msg_type(msg, WPS_M3) ||
181 wps_build_registrar_nonce(wps, msg) ||
182 wps_build_e_hash(wps, msg) ||
183 wps_build_authenticator(wps, msg)) {
184 wpabuf_free(msg);
185 return NULL;
186 }
187
188 wps->state = RECV_M4;
189 return msg;
190 }
191
192
193 static struct wpabuf * wps_build_m5(struct wps_data *wps)
194 {
195 struct wpabuf *msg, *plain;
196
197 wpa_printf(MSG_DEBUG, "WPS: Building Message M5");
198
199 plain = wpabuf_alloc(200);
200 if (plain == NULL)
201 return NULL;
202
203 msg = wpabuf_alloc(1000);
204 if (msg == NULL) {
205 wpabuf_free(plain);
206 return NULL;
207 }
208
209 if (wps_build_version(msg) ||
210 wps_build_msg_type(msg, WPS_M5) ||
211 wps_build_registrar_nonce(wps, msg) ||
212 wps_build_e_snonce1(wps, plain) ||
213 wps_build_key_wrap_auth(wps, plain) ||
214 wps_build_encr_settings(wps, msg, plain) ||
215 wps_build_authenticator(wps, msg)) {
216 wpabuf_free(plain);
217 wpabuf_free(msg);
218 return NULL;
219 }
220 wpabuf_free(plain);
221
222 wps->state = RECV_M6;
223 return msg;
224 }
225
226
227 static int wps_build_cred_ssid(struct wps_data *wps, struct wpabuf *msg)
228 {
229 wpa_printf(MSG_DEBUG, "WPS: * SSID");
230 wpabuf_put_be16(msg, ATTR_SSID);
231 wpabuf_put_be16(msg, wps->wps->ssid_len);
232 wpabuf_put_data(msg, wps->wps->ssid, wps->wps->ssid_len);
233 return 0;
234 }
235
236
237 static int wps_build_cred_auth_type(struct wps_data *wps, struct wpabuf *msg)
238 {
239 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type");
240 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
241 wpabuf_put_be16(msg, 2);
242 wpabuf_put_be16(msg, wps->wps->auth_types);
243 return 0;
244 }
245
246
247 static int wps_build_cred_encr_type(struct wps_data *wps, struct wpabuf *msg)
248 {
249 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type");
250 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
251 wpabuf_put_be16(msg, 2);
252 wpabuf_put_be16(msg, wps->wps->encr_types);
253 return 0;
254 }
255
256
257 static int wps_build_cred_network_key(struct wps_data *wps, struct wpabuf *msg)
258 {
259 wpa_printf(MSG_DEBUG, "WPS: * Network Key");
260 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
261 wpabuf_put_be16(msg, wps->wps->network_key_len);
262 wpabuf_put_data(msg, wps->wps->network_key, wps->wps->network_key_len);
263 return 0;
264 }
265
266
267 static int wps_build_cred_mac_addr(struct wps_data *wps, struct wpabuf *msg)
268 {
269 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (AP BSSID)");
270 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
271 wpabuf_put_be16(msg, ETH_ALEN);
272 wpabuf_put_data(msg, wps->wps->dev.mac_addr, ETH_ALEN);
273 return 0;
274 }
275
276
277 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *plain)
278 {
279 if (wps->wps->ap_settings) {
280 wpa_printf(MSG_DEBUG, "WPS: * AP Settings (pre-configured)");
281 wpabuf_put_data(plain, wps->wps->ap_settings,
282 wps->wps->ap_settings_len);
283 return 0;
284 }
285
286 return wps_build_cred_ssid(wps, plain) ||
287 wps_build_cred_mac_addr(wps, plain) ||
288 wps_build_cred_auth_type(wps, plain) ||
289 wps_build_cred_encr_type(wps, plain) ||
290 wps_build_cred_network_key(wps, plain);
291 }
292
293
294 static struct wpabuf * wps_build_m7(struct wps_data *wps)
295 {
296 struct wpabuf *msg, *plain;
297
298 wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
299
300 plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
301 if (plain == NULL)
302 return NULL;
303
304 msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
305 if (msg == NULL) {
306 wpabuf_free(plain);
307 return NULL;
308 }
309
310 if (wps_build_version(msg) ||
311 wps_build_msg_type(msg, WPS_M7) ||
312 wps_build_registrar_nonce(wps, msg) ||
313 wps_build_e_snonce2(wps, plain) ||
314 (wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
315 wps_build_key_wrap_auth(wps, plain) ||
316 wps_build_encr_settings(wps, msg, plain) ||
317 wps_build_authenticator(wps, msg)) {
318 wpabuf_free(plain);
319 wpabuf_free(msg);
320 return NULL;
321 }
322 wpabuf_free(plain);
323
324 wps->state = RECV_M8;
325 return msg;
326 }
327
328
329 static struct wpabuf * wps_build_wsc_done(struct wps_data *wps)
330 {
331 struct wpabuf *msg;
332
333 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_Done");
334
335 msg = wpabuf_alloc(1000);
336 if (msg == NULL)
337 return NULL;
338
339 if (wps_build_version(msg) ||
340 wps_build_msg_type(msg, WPS_WSC_DONE) ||
341 wps_build_enrollee_nonce(wps, msg) ||
342 wps_build_registrar_nonce(wps, msg)) {
343 wpabuf_free(msg);
344 return NULL;
345 }
346
347 if (wps->wps->ap)
348 wps->state = RECV_ACK;
349 else {
350 wps_success_event(wps->wps);
351 wps->state = WPS_FINISHED;
352 }
353 return msg;
354 }
355
356
357 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
358 {
359 struct wpabuf *msg;
360
361 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
362
363 msg = wpabuf_alloc(1000);
364 if (msg == NULL)
365 return NULL;
366
367 if (wps_build_version(msg) ||
368 wps_build_msg_type(msg, WPS_WSC_ACK) ||
369 wps_build_enrollee_nonce(wps, msg) ||
370 wps_build_registrar_nonce(wps, msg)) {
371 wpabuf_free(msg);
372 return NULL;
373 }
374
375 return msg;
376 }
377
378
379 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
380 {
381 struct wpabuf *msg;
382
383 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
384
385 msg = wpabuf_alloc(1000);
386 if (msg == NULL)
387 return NULL;
388
389 if (wps_build_version(msg) ||
390 wps_build_msg_type(msg, WPS_WSC_NACK) ||
391 wps_build_enrollee_nonce(wps, msg) ||
392 wps_build_registrar_nonce(wps, msg) ||
393 wps_build_config_error(msg, wps->config_error)) {
394 wpabuf_free(msg);
395 return NULL;
396 }
397
398 return msg;
399 }
400
401
402 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
403 enum wsc_op_code *op_code)
404 {
405 struct wpabuf *msg;
406
407 switch (wps->state) {
408 case SEND_M1:
409 msg = wps_build_m1(wps);
410 *op_code = WSC_MSG;
411 break;
412 case SEND_M3:
413 msg = wps_build_m3(wps);
414 *op_code = WSC_MSG;
415 break;
416 case SEND_M5:
417 msg = wps_build_m5(wps);
418 *op_code = WSC_MSG;
419 break;
420 case SEND_M7:
421 msg = wps_build_m7(wps);
422 *op_code = WSC_MSG;
423 break;
424 case RECEIVED_M2D:
425 if (wps->wps->ap) {
426 msg = wps_build_wsc_nack(wps);
427 *op_code = WSC_NACK;
428 break;
429 }
430 msg = wps_build_wsc_ack(wps);
431 *op_code = WSC_ACK;
432 if (msg) {
433 /* Another M2/M2D may be received */
434 wps->state = RECV_M2;
435 }
436 break;
437 case SEND_WSC_NACK:
438 msg = wps_build_wsc_nack(wps);
439 *op_code = WSC_NACK;
440 break;
441 case WPS_MSG_DONE:
442 msg = wps_build_wsc_done(wps);
443 *op_code = WSC_Done;
444 break;
445 default:
446 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
447 "a message", wps->state);
448 msg = NULL;
449 break;
450 }
451
452 if (*op_code == WSC_MSG && msg) {
453 /* Save a copy of the last message for Authenticator derivation
454 */
455 wpabuf_free(wps->last_msg);
456 wps->last_msg = wpabuf_dup(msg);
457 }
458
459 return msg;
460 }
461
462
463 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
464 {
465 if (r_nonce == NULL) {
466 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
467 return -1;
468 }
469
470 os_memcpy(wps->nonce_r, r_nonce, WPS_NONCE_LEN);
471 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
472 wps->nonce_r, WPS_NONCE_LEN);
473
474 return 0;
475 }
476
477
478 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
479 {
480 if (e_nonce == NULL) {
481 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
482 return -1;
483 }
484
485 if (os_memcmp(wps->nonce_e, e_nonce, WPS_NONCE_LEN) != 0) {
486 wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce received");
487 return -1;
488 }
489
490 return 0;
491 }
492
493
494 static int wps_process_uuid_r(struct wps_data *wps, const u8 *uuid_r)
495 {
496 if (uuid_r == NULL) {
497 wpa_printf(MSG_DEBUG, "WPS: No UUID-R received");
498 return -1;
499 }
500
501 os_memcpy(wps->uuid_r, uuid_r, WPS_UUID_LEN);
502 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
503
504 return 0;
505 }
506
507
508 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
509 size_t pk_len)
510 {
511 if (pk == NULL || pk_len == 0) {
512 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
513 return -1;
514 }
515
516 wpabuf_free(wps->dh_pubkey_r);
517 wps->dh_pubkey_r = wpabuf_alloc_copy(pk, pk_len);
518 if (wps->dh_pubkey_r == NULL)
519 return -1;
520
521 if (wps_derive_keys(wps) < 0)
522 return -1;
523
524 return 0;
525 }
526
527
528 static int wps_process_r_hash1(struct wps_data *wps, const u8 *r_hash1)
529 {
530 if (r_hash1 == NULL) {
531 wpa_printf(MSG_DEBUG, "WPS: No R-Hash1 received");
532 return -1;
533 }
534
535 os_memcpy(wps->peer_hash1, r_hash1, WPS_HASH_LEN);
536 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", wps->peer_hash1, WPS_HASH_LEN);
537
538 return 0;
539 }
540
541
542 static int wps_process_r_hash2(struct wps_data *wps, const u8 *r_hash2)
543 {
544 if (r_hash2 == NULL) {
545 wpa_printf(MSG_DEBUG, "WPS: No R-Hash2 received");
546 return -1;
547 }
548
549 os_memcpy(wps->peer_hash2, r_hash2, WPS_HASH_LEN);
550 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", wps->peer_hash2, WPS_HASH_LEN);
551
552 return 0;
553 }
554
555
556 static int wps_process_r_snonce1(struct wps_data *wps, const u8 *r_snonce1)
557 {
558 u8 hash[SHA256_MAC_LEN];
559 const u8 *addr[4];
560 size_t len[4];
561
562 if (r_snonce1 == NULL) {
563 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce1 received");
564 return -1;
565 }
566
567 wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce1", r_snonce1,
568 WPS_SECRET_NONCE_LEN);
569
570 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
571 addr[0] = r_snonce1;
572 len[0] = WPS_SECRET_NONCE_LEN;
573 addr[1] = wps->psk1;
574 len[1] = WPS_PSK_LEN;
575 addr[2] = wpabuf_head(wps->dh_pubkey_e);
576 len[2] = wpabuf_len(wps->dh_pubkey_e);
577 addr[3] = wpabuf_head(wps->dh_pubkey_r);
578 len[3] = wpabuf_len(wps->dh_pubkey_r);
579 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
580
581 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
582 wpa_printf(MSG_DEBUG, "WPS: R-Hash1 derived from R-S1 does "
583 "not match with the pre-committed value");
584 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
585 wps_pwd_auth_fail_event(wps->wps, 1, 1);
586 return -1;
587 }
588
589 wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the first "
590 "half of the device password");
591
592 return 0;
593 }
594
595
596 static int wps_process_r_snonce2(struct wps_data *wps, const u8 *r_snonce2)
597 {
598 u8 hash[SHA256_MAC_LEN];
599 const u8 *addr[4];
600 size_t len[4];
601
602 if (r_snonce2 == NULL) {
603 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce2 received");
604 return -1;
605 }
606
607 wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce2", r_snonce2,
608 WPS_SECRET_NONCE_LEN);
609
610 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
611 addr[0] = r_snonce2;
612 len[0] = WPS_SECRET_NONCE_LEN;
613 addr[1] = wps->psk2;
614 len[1] = WPS_PSK_LEN;
615 addr[2] = wpabuf_head(wps->dh_pubkey_e);
616 len[2] = wpabuf_len(wps->dh_pubkey_e);
617 addr[3] = wpabuf_head(wps->dh_pubkey_r);
618 len[3] = wpabuf_len(wps->dh_pubkey_r);
619 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
620
621 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
622 wpa_printf(MSG_DEBUG, "WPS: R-Hash2 derived from R-S2 does "
623 "not match with the pre-committed value");
624 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
625 wps_pwd_auth_fail_event(wps->wps, 1, 2);
626 return -1;
627 }
628
629 wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the second "
630 "half of the device password");
631
632 return 0;
633 }
634
635
636 static int wps_process_cred_e(struct wps_data *wps, const u8 *cred,
637 size_t cred_len)
638 {
639 struct wps_parse_attr attr;
640 struct wpabuf msg;
641
642 wpa_printf(MSG_DEBUG, "WPS: Received Credential");
643 os_memset(&wps->cred, 0, sizeof(wps->cred));
644 wpabuf_set(&msg, cred, cred_len);
645 if (wps_parse_msg(&msg, &attr) < 0 ||
646 wps_process_cred(&attr, &wps->cred))
647 return -1;
648
649 if (os_memcmp(wps->cred.mac_addr, wps->wps->dev.mac_addr, ETH_ALEN) !=
650 0) {
651 wpa_printf(MSG_DEBUG, "WPS: MAC Address in the Credential ("
652 MACSTR ") does not match with own address (" MACSTR
653 ")", MAC2STR(wps->cred.mac_addr),
654 MAC2STR(wps->wps->dev.mac_addr));
655 /*
656 * In theory, this could be consider fatal error, but there are
657 * number of deployed implementations using other address here
658 * due to unclarity in the specification. For interoperability
659 * reasons, allow this to be processed since we do not really
660 * use the MAC Address information for anything.
661 */
662 }
663
664 if (wps->wps->cred_cb) {
665 wps->cred.cred_attr = cred - 4;
666 wps->cred.cred_attr_len = cred_len + 4;
667 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
668 wps->cred.cred_attr = NULL;
669 wps->cred.cred_attr_len = 0;
670 }
671
672 return 0;
673 }
674
675
676 static int wps_process_creds(struct wps_data *wps, const u8 *cred[],
677 size_t cred_len[], size_t num_cred)
678 {
679 size_t i;
680
681 if (wps->wps->ap)
682 return 0;
683
684 if (num_cred == 0) {
685 wpa_printf(MSG_DEBUG, "WPS: No Credential attributes "
686 "received");
687 return -1;
688 }
689
690 for (i = 0; i < num_cred; i++) {
691 if (wps_process_cred_e(wps, cred[i], cred_len[i]))
692 return -1;
693 }
694
695 return 0;
696 }
697
698
699 static int wps_process_ap_settings_e(struct wps_data *wps,
700 struct wps_parse_attr *attr,
701 struct wpabuf *attrs)
702 {
703 struct wps_credential cred;
704
705 if (!wps->wps->ap)
706 return 0;
707
708 if (wps_process_ap_settings(attr, &cred) < 0)
709 return -1;
710
711 wpa_printf(MSG_INFO, "WPS: Received new AP configuration from "
712 "Registrar");
713
714 if (os_memcmp(cred.mac_addr, wps->wps->dev.mac_addr, ETH_ALEN) !=
715 0) {
716 wpa_printf(MSG_DEBUG, "WPS: MAC Address in the AP Settings ("
717 MACSTR ") does not match with own address (" MACSTR
718 ")", MAC2STR(cred.mac_addr),
719 MAC2STR(wps->wps->dev.mac_addr));
720 /*
721 * In theory, this could be consider fatal error, but there are
722 * number of deployed implementations using other address here
723 * due to unclarity in the specification. For interoperability
724 * reasons, allow this to be processed since we do not really
725 * use the MAC Address information for anything.
726 */
727 }
728
729 if (wps->wps->cred_cb) {
730 cred.cred_attr = wpabuf_head(attrs);
731 cred.cred_attr_len = wpabuf_len(attrs);
732 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
733 }
734
735 return 0;
736 }
737
738
739 static enum wps_process_res wps_process_m2(struct wps_data *wps,
740 const struct wpabuf *msg,
741 struct wps_parse_attr *attr)
742 {
743 wpa_printf(MSG_DEBUG, "WPS: Received M2");
744
745 if (wps->state != RECV_M2) {
746 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
747 "receiving M2", wps->state);
748 wps->state = SEND_WSC_NACK;
749 return WPS_CONTINUE;
750 }
751
752 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
753 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
754 wps_process_uuid_r(wps, attr->uuid_r) ||
755 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
756 wps_process_authenticator(wps, attr->authenticator, msg)) {
757 wps->state = SEND_WSC_NACK;
758 return WPS_CONTINUE;
759 }
760
761 if (wps->wps->ap && wps->wps->ap_setup_locked) {
762 wpa_printf(MSG_DEBUG, "WPS: AP Setup is locked - refuse "
763 "registration of a new Registrar");
764 wps->config_error = WPS_CFG_SETUP_LOCKED;
765 wps->state = SEND_WSC_NACK;
766 return WPS_CONTINUE;
767 }
768
769 wps->state = SEND_M3;
770 return WPS_CONTINUE;
771 }
772
773
774 static enum wps_process_res wps_process_m2d(struct wps_data *wps,
775 struct wps_parse_attr *attr)
776 {
777 wpa_printf(MSG_DEBUG, "WPS: Received M2D");
778
779 if (wps->state != RECV_M2) {
780 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
781 "receiving M2D", wps->state);
782 wps->state = SEND_WSC_NACK;
783 return WPS_CONTINUE;
784 }
785
786 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Manufacturer",
787 attr->manufacturer, attr->manufacturer_len);
788 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Name",
789 attr->model_name, attr->model_name_len);
790 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Number",
791 attr->model_number, attr->model_number_len);
792 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Serial Number",
793 attr->serial_number, attr->serial_number_len);
794 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Device Name",
795 attr->dev_name, attr->dev_name_len);
796
797 if (wps->wps->event_cb) {
798 union wps_event_data data;
799 struct wps_event_m2d *m2d = &data.m2d;
800 os_memset(&data, 0, sizeof(data));
801 if (attr->config_methods)
802 m2d->config_methods =
803 WPA_GET_BE16(attr->config_methods);
804 m2d->manufacturer = attr->manufacturer;
805 m2d->manufacturer_len = attr->manufacturer_len;
806 m2d->model_name = attr->model_name;
807 m2d->model_name_len = attr->model_name_len;
808 m2d->model_number = attr->model_number;
809 m2d->model_number_len = attr->model_number_len;
810 m2d->serial_number = attr->serial_number;
811 m2d->serial_number_len = attr->serial_number_len;
812 m2d->dev_name = attr->dev_name;
813 m2d->dev_name_len = attr->dev_name_len;
814 m2d->primary_dev_type = attr->primary_dev_type;
815 if (attr->config_error)
816 m2d->config_error =
817 WPA_GET_BE16(attr->config_error);
818 if (attr->dev_password_id)
819 m2d->dev_password_id =
820 WPA_GET_BE16(attr->dev_password_id);
821 wps->wps->event_cb(wps->wps->cb_ctx, WPS_EV_M2D, &data);
822 }
823
824 wps->state = RECEIVED_M2D;
825 return WPS_CONTINUE;
826 }
827
828
829 static enum wps_process_res wps_process_m4(struct wps_data *wps,
830 const struct wpabuf *msg,
831 struct wps_parse_attr *attr)
832 {
833 struct wpabuf *decrypted;
834 struct wps_parse_attr eattr;
835
836 wpa_printf(MSG_DEBUG, "WPS: Received M4");
837
838 if (wps->state != RECV_M4) {
839 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
840 "receiving M4", wps->state);
841 wps->state = SEND_WSC_NACK;
842 return WPS_CONTINUE;
843 }
844
845 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
846 wps_process_authenticator(wps, attr->authenticator, msg) ||
847 wps_process_r_hash1(wps, attr->r_hash1) ||
848 wps_process_r_hash2(wps, attr->r_hash2)) {
849 wps->state = SEND_WSC_NACK;
850 return WPS_CONTINUE;
851 }
852
853 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
854 attr->encr_settings_len);
855 if (decrypted == NULL) {
856 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
857 "Settings attribute");
858 wps->state = SEND_WSC_NACK;
859 return WPS_CONTINUE;
860 }
861
862 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
863 "attribute");
864 if (wps_parse_msg(decrypted, &eattr) < 0 ||
865 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
866 wps_process_r_snonce1(wps, eattr.r_snonce1)) {
867 wpabuf_free(decrypted);
868 wps->state = SEND_WSC_NACK;
869 return WPS_CONTINUE;
870 }
871 wpabuf_free(decrypted);
872
873 wps->state = SEND_M5;
874 return WPS_CONTINUE;
875 }
876
877
878 static enum wps_process_res wps_process_m6(struct wps_data *wps,
879 const struct wpabuf *msg,
880 struct wps_parse_attr *attr)
881 {
882 struct wpabuf *decrypted;
883 struct wps_parse_attr eattr;
884
885 wpa_printf(MSG_DEBUG, "WPS: Received M6");
886
887 if (wps->state != RECV_M6) {
888 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
889 "receiving M6", wps->state);
890 wps->state = SEND_WSC_NACK;
891 return WPS_CONTINUE;
892 }
893
894 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
895 wps_process_authenticator(wps, attr->authenticator, msg)) {
896 wps->state = SEND_WSC_NACK;
897 return WPS_CONTINUE;
898 }
899
900 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
901 attr->encr_settings_len);
902 if (decrypted == NULL) {
903 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
904 "Settings attribute");
905 wps->state = SEND_WSC_NACK;
906 return WPS_CONTINUE;
907 }
908
909 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
910 "attribute");
911 if (wps_parse_msg(decrypted, &eattr) < 0 ||
912 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
913 wps_process_r_snonce2(wps, eattr.r_snonce2)) {
914 wpabuf_free(decrypted);
915 wps->state = SEND_WSC_NACK;
916 return WPS_CONTINUE;
917 }
918 wpabuf_free(decrypted);
919
920 wps->state = SEND_M7;
921 return WPS_CONTINUE;
922 }
923
924
925 static enum wps_process_res wps_process_m8(struct wps_data *wps,
926 const struct wpabuf *msg,
927 struct wps_parse_attr *attr)
928 {
929 struct wpabuf *decrypted;
930 struct wps_parse_attr eattr;
931
932 wpa_printf(MSG_DEBUG, "WPS: Received M8");
933
934 if (wps->state != RECV_M8) {
935 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
936 "receiving M8", wps->state);
937 wps->state = SEND_WSC_NACK;
938 return WPS_CONTINUE;
939 }
940
941 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
942 wps_process_authenticator(wps, attr->authenticator, msg)) {
943 wps->state = SEND_WSC_NACK;
944 return WPS_CONTINUE;
945 }
946
947 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
948 attr->encr_settings_len);
949 if (decrypted == NULL) {
950 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
951 "Settings attribute");
952 wps->state = SEND_WSC_NACK;
953 return WPS_CONTINUE;
954 }
955
956 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
957 "attribute");
958 if (wps_parse_msg(decrypted, &eattr) < 0 ||
959 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
960 wps_process_creds(wps, eattr.cred, eattr.cred_len,
961 eattr.num_cred) ||
962 wps_process_ap_settings_e(wps, &eattr, decrypted)) {
963 wpabuf_free(decrypted);
964 wps->state = SEND_WSC_NACK;
965 return WPS_CONTINUE;
966 }
967 wpabuf_free(decrypted);
968
969 wps->state = WPS_MSG_DONE;
970 return WPS_CONTINUE;
971 }
972
973
974 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
975 const struct wpabuf *msg)
976 {
977 struct wps_parse_attr attr;
978 enum wps_process_res ret = WPS_CONTINUE;
979
980 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
981
982 if (wps_parse_msg(msg, &attr) < 0)
983 return WPS_FAILURE;
984
985 if (!wps_version_supported(attr.version)) {
986 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
987 attr.version ? *attr.version : 0);
988 return WPS_FAILURE;
989 }
990
991 if (attr.enrollee_nonce == NULL ||
992 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
993 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
994 return WPS_FAILURE;
995 }
996
997 if (attr.msg_type == NULL) {
998 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
999 return WPS_FAILURE;
1000 }
1001
1002 switch (*attr.msg_type) {
1003 case WPS_M2:
1004 ret = wps_process_m2(wps, msg, &attr);
1005 break;
1006 case WPS_M2D:
1007 ret = wps_process_m2d(wps, &attr);
1008 break;
1009 case WPS_M4:
1010 ret = wps_process_m4(wps, msg, &attr);
1011 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1012 wps_fail_event(wps->wps, WPS_M4);
1013 break;
1014 case WPS_M6:
1015 ret = wps_process_m6(wps, msg, &attr);
1016 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1017 wps_fail_event(wps->wps, WPS_M6);
1018 break;
1019 case WPS_M8:
1020 ret = wps_process_m8(wps, msg, &attr);
1021 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1022 wps_fail_event(wps->wps, WPS_M8);
1023 break;
1024 default:
1025 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
1026 *attr.msg_type);
1027 return WPS_FAILURE;
1028 }
1029
1030 /*
1031 * Save a copy of the last message for Authenticator derivation if we
1032 * are continuing. However, skip M2D since it is not authenticated and
1033 * neither is the ACK/NACK response frame. This allows the possibly
1034 * following M2 to be processed correctly by using the previously sent
1035 * M1 in Authenticator derivation.
1036 */
1037 if (ret == WPS_CONTINUE && *attr.msg_type != WPS_M2D) {
1038 /* Save a copy of the last message for Authenticator derivation
1039 */
1040 wpabuf_free(wps->last_msg);
1041 wps->last_msg = wpabuf_dup(msg);
1042 }
1043
1044 return ret;
1045 }
1046
1047
1048 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
1049 const struct wpabuf *msg)
1050 {
1051 struct wps_parse_attr attr;
1052
1053 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
1054
1055 if (wps_parse_msg(msg, &attr) < 0)
1056 return WPS_FAILURE;
1057
1058 if (!wps_version_supported(attr.version)) {
1059 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1060 attr.version ? *attr.version : 0);
1061 return WPS_FAILURE;
1062 }
1063
1064 if (attr.msg_type == NULL) {
1065 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1066 return WPS_FAILURE;
1067 }
1068
1069 if (*attr.msg_type != WPS_WSC_ACK) {
1070 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1071 *attr.msg_type);
1072 return WPS_FAILURE;
1073 }
1074
1075 if (attr.registrar_nonce == NULL ||
1076 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1077 {
1078 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1079 return WPS_FAILURE;
1080 }
1081
1082 if (attr.enrollee_nonce == NULL ||
1083 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1084 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1085 return WPS_FAILURE;
1086 }
1087
1088 if (wps->state == RECV_ACK && wps->wps->ap) {
1089 wpa_printf(MSG_DEBUG, "WPS: External Registrar registration "
1090 "completed successfully");
1091 wps_success_event(wps->wps);
1092 wps->state = WPS_FINISHED;
1093 return WPS_DONE;
1094 }
1095
1096 return WPS_FAILURE;
1097 }
1098
1099
1100 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
1101 const struct wpabuf *msg)
1102 {
1103 struct wps_parse_attr attr;
1104
1105 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
1106
1107 if (wps_parse_msg(msg, &attr) < 0)
1108 return WPS_FAILURE;
1109
1110 if (!wps_version_supported(attr.version)) {
1111 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1112 attr.version ? *attr.version : 0);
1113 return WPS_FAILURE;
1114 }
1115
1116 if (attr.msg_type == NULL) {
1117 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1118 return WPS_FAILURE;
1119 }
1120
1121 if (*attr.msg_type != WPS_WSC_NACK) {
1122 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1123 *attr.msg_type);
1124 return WPS_FAILURE;
1125 }
1126
1127 if (attr.registrar_nonce == NULL ||
1128 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1129 {
1130 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1131 wpa_hexdump(MSG_DEBUG, "WPS: Received Registrar Nonce",
1132 attr.registrar_nonce, WPS_NONCE_LEN);
1133 wpa_hexdump(MSG_DEBUG, "WPS: Expected Registrar Nonce",
1134 wps->nonce_r, WPS_NONCE_LEN);
1135 return WPS_FAILURE;
1136 }
1137
1138 if (attr.enrollee_nonce == NULL ||
1139 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1140 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1141 wpa_hexdump(MSG_DEBUG, "WPS: Received Enrollee Nonce",
1142 attr.enrollee_nonce, WPS_NONCE_LEN);
1143 wpa_hexdump(MSG_DEBUG, "WPS: Expected Enrollee Nonce",
1144 wps->nonce_e, WPS_NONCE_LEN);
1145 return WPS_FAILURE;
1146 }
1147
1148 if (attr.config_error == NULL) {
1149 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
1150 "in WSC_NACK");
1151 return WPS_FAILURE;
1152 }
1153
1154 wpa_printf(MSG_DEBUG, "WPS: Registrar terminated negotiation with "
1155 "Configuration Error %d", WPA_GET_BE16(attr.config_error));
1156
1157 switch (wps->state) {
1158 case RECV_M4:
1159 wps_fail_event(wps->wps, WPS_M3);
1160 break;
1161 case RECV_M6:
1162 wps_fail_event(wps->wps, WPS_M5);
1163 break;
1164 case RECV_M8:
1165 wps_fail_event(wps->wps, WPS_M7);
1166 break;
1167 default:
1168 break;
1169 }
1170
1171 /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
1172 * Enrollee is Authenticator */
1173 wps->state = SEND_WSC_NACK;
1174
1175 return WPS_FAILURE;
1176 }
1177
1178
1179 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
1180 enum wsc_op_code op_code,
1181 const struct wpabuf *msg)
1182 {
1183
1184 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
1185 "op_code=%d)",
1186 (unsigned long) wpabuf_len(msg), op_code);
1187
1188 if (op_code == WSC_UPnP) {
1189 /* Determine the OpCode based on message type attribute */
1190 struct wps_parse_attr attr;
1191 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type) {
1192 if (*attr.msg_type == WPS_WSC_ACK)
1193 op_code = WSC_ACK;
1194 else if (*attr.msg_type == WPS_WSC_NACK)
1195 op_code = WSC_NACK;
1196 }
1197 }
1198
1199 switch (op_code) {
1200 case WSC_MSG:
1201 case WSC_UPnP:
1202 return wps_process_wsc_msg(wps, msg);
1203 case WSC_ACK:
1204 return wps_process_wsc_ack(wps, msg);
1205 case WSC_NACK:
1206 return wps_process_wsc_nack(wps, msg);
1207 default:
1208 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
1209 return WPS_FAILURE;
1210 }
1211 }
DragonFly BSD