2 * Wi-Fi Protected Setup - Enrollee
3 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
20 #include "wps_dev_attr.h"
24 static int wps_build_mac_addr(struct wps_data *wps, struct wpabuf *msg)
26 wpa_printf(MSG_DEBUG, "WPS: * MAC Address");
27 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
28 wpabuf_put_be16(msg, ETH_ALEN);
29 wpabuf_put_data(msg, wps->mac_addr_e, ETH_ALEN);
34 static int wps_build_wps_state(struct wps_data *wps, struct wpabuf *msg)
38 state = wps->wps->wps_state;
40 state = WPS_STATE_NOT_CONFIGURED;
41 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
43 wpabuf_put_be16(msg, ATTR_WPS_STATE);
44 wpabuf_put_be16(msg, 1);
45 wpabuf_put_u8(msg, state);
50 static int wps_build_e_hash(struct wps_data *wps, struct wpabuf *msg)
56 if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
58 wpa_hexdump(MSG_DEBUG, "WPS: E-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
59 wpa_hexdump(MSG_DEBUG, "WPS: E-S2",
60 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
62 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
63 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
68 wpa_printf(MSG_DEBUG, "WPS: * E-Hash1");
69 wpabuf_put_be16(msg, ATTR_E_HASH1);
70 wpabuf_put_be16(msg, SHA256_MAC_LEN);
71 hash = wpabuf_put(msg, SHA256_MAC_LEN);
72 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
73 addr[0] = wps->snonce;
74 len[0] = WPS_SECRET_NONCE_LEN;
77 addr[2] = wpabuf_head(wps->dh_pubkey_e);
78 len[2] = wpabuf_len(wps->dh_pubkey_e);
79 addr[3] = wpabuf_head(wps->dh_pubkey_r);
80 len[3] = wpabuf_len(wps->dh_pubkey_r);
81 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
82 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", hash, SHA256_MAC_LEN);
84 wpa_printf(MSG_DEBUG, "WPS: * E-Hash2");
85 wpabuf_put_be16(msg, ATTR_E_HASH2);
86 wpabuf_put_be16(msg, SHA256_MAC_LEN);
87 hash = wpabuf_put(msg, SHA256_MAC_LEN);
88 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
89 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
91 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
92 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", hash, SHA256_MAC_LEN);
98 static int wps_build_e_snonce1(struct wps_data *wps, struct wpabuf *msg)
100 wpa_printf(MSG_DEBUG, "WPS: * E-SNonce1");
101 wpabuf_put_be16(msg, ATTR_E_SNONCE1);
102 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
103 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
108 static int wps_build_e_snonce2(struct wps_data *wps, struct wpabuf *msg)
110 wpa_printf(MSG_DEBUG, "WPS: * E-SNonce2");
111 wpabuf_put_be16(msg, ATTR_E_SNONCE2);
112 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
113 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
114 WPS_SECRET_NONCE_LEN);
119 static struct wpabuf * wps_build_m1(struct wps_data *wps)
124 if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
126 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
127 wps->nonce_e, WPS_NONCE_LEN);
129 wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
130 msg = wpabuf_alloc(1000);
134 methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
135 #ifdef CONFIG_WPS_UFD
136 methods |= WPS_CONFIG_USBA;
137 #endif /* CONFIG_WPS_UFD */
138 #ifdef CONFIG_WPS_NFC
139 methods |= WPS_CONFIG_NFC_INTERFACE;
140 #endif /* CONFIG_WPS_NFC */
142 methods |= WPS_CONFIG_PUSHBUTTON;
144 if (wps_build_version(msg) ||
145 wps_build_msg_type(msg, WPS_M1) ||
146 wps_build_uuid_e(msg, wps->uuid_e) ||
147 wps_build_mac_addr(wps, msg) ||
148 wps_build_enrollee_nonce(wps, msg) ||
149 wps_build_public_key(wps, msg) ||
150 wps_build_auth_type_flags(wps, msg) ||
151 wps_build_encr_type_flags(wps, msg) ||
152 wps_build_conn_type_flags(wps, msg) ||
153 wps_build_config_methods(msg, methods) ||
154 wps_build_wps_state(wps, msg) ||
155 wps_build_device_attrs(&wps->wps->dev, msg) ||
156 wps_build_rf_bands(&wps->wps->dev, msg) ||
157 wps_build_assoc_state(wps, msg) ||
158 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
159 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
160 wps_build_os_version(&wps->wps->dev, msg)) {
165 wps->state = RECV_M2;
170 static struct wpabuf * wps_build_m3(struct wps_data *wps)
174 wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
176 if (wps->dev_password == NULL) {
177 wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
180 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
182 msg = wpabuf_alloc(1000);
186 if (wps_build_version(msg) ||
187 wps_build_msg_type(msg, WPS_M3) ||
188 wps_build_registrar_nonce(wps, msg) ||
189 wps_build_e_hash(wps, msg) ||
190 wps_build_authenticator(wps, msg)) {
195 wps->state = RECV_M4;
200 static struct wpabuf * wps_build_m5(struct wps_data *wps)
202 struct wpabuf *msg, *plain;
204 wpa_printf(MSG_DEBUG, "WPS: Building Message M5");
206 plain = wpabuf_alloc(200);
210 msg = wpabuf_alloc(1000);
216 if (wps_build_version(msg) ||
217 wps_build_msg_type(msg, WPS_M5) ||
218 wps_build_registrar_nonce(wps, msg) ||
219 wps_build_e_snonce1(wps, plain) ||
220 wps_build_key_wrap_auth(wps, plain) ||
221 wps_build_encr_settings(wps, msg, plain) ||
222 wps_build_authenticator(wps, msg)) {
229 wps->state = RECV_M6;
234 static int wps_build_cred_ssid(struct wps_data *wps, struct wpabuf *msg)
236 wpa_printf(MSG_DEBUG, "WPS: * SSID");
237 wpabuf_put_be16(msg, ATTR_SSID);
238 wpabuf_put_be16(msg, wps->wps->ssid_len);
239 wpabuf_put_data(msg, wps->wps->ssid, wps->wps->ssid_len);
244 static int wps_build_cred_auth_type(struct wps_data *wps, struct wpabuf *msg)
246 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type");
247 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
248 wpabuf_put_be16(msg, 2);
249 wpabuf_put_be16(msg, wps->wps->auth_types);
254 static int wps_build_cred_encr_type(struct wps_data *wps, struct wpabuf *msg)
256 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type");
257 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
258 wpabuf_put_be16(msg, 2);
259 wpabuf_put_be16(msg, wps->wps->encr_types);
264 static int wps_build_cred_network_key(struct wps_data *wps, struct wpabuf *msg)
266 wpa_printf(MSG_DEBUG, "WPS: * Network Key");
267 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
268 wpabuf_put_be16(msg, wps->wps->network_key_len);
269 wpabuf_put_data(msg, wps->wps->network_key, wps->wps->network_key_len);
274 static int wps_build_cred_mac_addr(struct wps_data *wps, struct wpabuf *msg)
276 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (AP BSSID)");
277 wpabuf_put_be16(msg, ATTR_MAC_ADDR);
278 wpabuf_put_be16(msg, ETH_ALEN);
279 wpabuf_put_data(msg, wps->wps->dev.mac_addr, ETH_ALEN);
284 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *plain)
286 if (wps->wps->ap_settings) {
287 wpa_printf(MSG_DEBUG, "WPS: * AP Settings (pre-configured)");
288 wpabuf_put_data(plain, wps->wps->ap_settings,
289 wps->wps->ap_settings_len);
293 return wps_build_cred_ssid(wps, plain) ||
294 wps_build_cred_mac_addr(wps, plain) ||
295 wps_build_cred_auth_type(wps, plain) ||
296 wps_build_cred_encr_type(wps, plain) ||
297 wps_build_cred_network_key(wps, plain);
301 static struct wpabuf * wps_build_m7(struct wps_data *wps)
303 struct wpabuf *msg, *plain;
305 wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
307 plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
311 msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
317 if (wps_build_version(msg) ||
318 wps_build_msg_type(msg, WPS_M7) ||
319 wps_build_registrar_nonce(wps, msg) ||
320 wps_build_e_snonce2(wps, plain) ||
321 (wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
322 wps_build_key_wrap_auth(wps, plain) ||
323 wps_build_encr_settings(wps, msg, plain) ||
324 wps_build_authenticator(wps, msg)) {
331 wps->state = RECV_M8;
336 static struct wpabuf * wps_build_wsc_done(struct wps_data *wps)
340 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_Done");
342 msg = wpabuf_alloc(1000);
346 if (wps_build_version(msg) ||
347 wps_build_msg_type(msg, WPS_WSC_DONE) ||
348 wps_build_enrollee_nonce(wps, msg) ||
349 wps_build_registrar_nonce(wps, msg)) {
355 wps->state = RECV_ACK;
357 wps_success_event(wps->wps);
358 wps->state = WPS_FINISHED;
364 static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
368 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
370 msg = wpabuf_alloc(1000);
374 if (wps_build_version(msg) ||
375 wps_build_msg_type(msg, WPS_WSC_ACK) ||
376 wps_build_enrollee_nonce(wps, msg) ||
377 wps_build_registrar_nonce(wps, msg)) {
386 static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
390 wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
392 msg = wpabuf_alloc(1000);
396 if (wps_build_version(msg) ||
397 wps_build_msg_type(msg, WPS_WSC_NACK) ||
398 wps_build_enrollee_nonce(wps, msg) ||
399 wps_build_registrar_nonce(wps, msg) ||
400 wps_build_config_error(msg, wps->config_error)) {
409 struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
410 enum wsc_op_code *op_code)
414 switch (wps->state) {
416 msg = wps_build_m1(wps);
420 msg = wps_build_m3(wps);
424 msg = wps_build_m5(wps);
428 msg = wps_build_m7(wps);
433 msg = wps_build_wsc_nack(wps);
437 msg = wps_build_wsc_ack(wps);
440 /* Another M2/M2D may be received */
441 wps->state = RECV_M2;
445 msg = wps_build_wsc_nack(wps);
449 msg = wps_build_wsc_done(wps);
453 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
454 "a message", wps->state);
459 if (*op_code == WSC_MSG && msg) {
460 /* Save a copy of the last message for Authenticator derivation
462 wpabuf_free(wps->last_msg);
463 wps->last_msg = wpabuf_dup(msg);
470 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
472 if (r_nonce == NULL) {
473 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
477 os_memcpy(wps->nonce_r, r_nonce, WPS_NONCE_LEN);
478 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
479 wps->nonce_r, WPS_NONCE_LEN);
485 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
487 if (e_nonce == NULL) {
488 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
492 if (os_memcmp(wps->nonce_e, e_nonce, WPS_NONCE_LEN) != 0) {
493 wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce received");
501 static int wps_process_uuid_r(struct wps_data *wps, const u8 *uuid_r)
503 if (uuid_r == NULL) {
504 wpa_printf(MSG_DEBUG, "WPS: No UUID-R received");
508 os_memcpy(wps->uuid_r, uuid_r, WPS_UUID_LEN);
509 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
515 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
518 if (pk == NULL || pk_len == 0) {
519 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
523 #ifdef CONFIG_WPS_OOB
524 if (wps->dev_pw_id != DEV_PW_DEFAULT &&
525 wps->wps->oob_conf.pubkey_hash) {
527 u8 hash[WPS_HASH_LEN];
530 sha256_vector(1, addr, &pk_len, hash);
532 wpabuf_head(wps->wps->oob_conf.pubkey_hash),
533 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
534 wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
538 #endif /* CONFIG_WPS_OOB */
540 wpabuf_free(wps->dh_pubkey_r);
541 wps->dh_pubkey_r = wpabuf_alloc_copy(pk, pk_len);
542 if (wps->dh_pubkey_r == NULL)
545 if (wps_derive_keys(wps) < 0)
548 if (wps->request_type == WPS_REQ_WLAN_MANAGER_REGISTRAR &&
549 wps_derive_mgmt_keys(wps) < 0)
556 static int wps_process_r_hash1(struct wps_data *wps, const u8 *r_hash1)
558 if (r_hash1 == NULL) {
559 wpa_printf(MSG_DEBUG, "WPS: No R-Hash1 received");
563 os_memcpy(wps->peer_hash1, r_hash1, WPS_HASH_LEN);
564 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", wps->peer_hash1, WPS_HASH_LEN);
570 static int wps_process_r_hash2(struct wps_data *wps, const u8 *r_hash2)
572 if (r_hash2 == NULL) {
573 wpa_printf(MSG_DEBUG, "WPS: No R-Hash2 received");
577 os_memcpy(wps->peer_hash2, r_hash2, WPS_HASH_LEN);
578 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", wps->peer_hash2, WPS_HASH_LEN);
584 static int wps_process_r_snonce1(struct wps_data *wps, const u8 *r_snonce1)
586 u8 hash[SHA256_MAC_LEN];
590 if (r_snonce1 == NULL) {
591 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce1 received");
595 wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce1", r_snonce1,
596 WPS_SECRET_NONCE_LEN);
598 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
600 len[0] = WPS_SECRET_NONCE_LEN;
602 len[1] = WPS_PSK_LEN;
603 addr[2] = wpabuf_head(wps->dh_pubkey_e);
604 len[2] = wpabuf_len(wps->dh_pubkey_e);
605 addr[3] = wpabuf_head(wps->dh_pubkey_r);
606 len[3] = wpabuf_len(wps->dh_pubkey_r);
607 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
609 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
610 wpa_printf(MSG_DEBUG, "WPS: R-Hash1 derived from R-S1 does "
611 "not match with the pre-committed value");
612 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
613 wps_pwd_auth_fail_event(wps->wps, 1, 1);
617 wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the first "
618 "half of the device password");
624 static int wps_process_r_snonce2(struct wps_data *wps, const u8 *r_snonce2)
626 u8 hash[SHA256_MAC_LEN];
630 if (r_snonce2 == NULL) {
631 wpa_printf(MSG_DEBUG, "WPS: No R-SNonce2 received");
635 wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce2", r_snonce2,
636 WPS_SECRET_NONCE_LEN);
638 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
640 len[0] = WPS_SECRET_NONCE_LEN;
642 len[1] = WPS_PSK_LEN;
643 addr[2] = wpabuf_head(wps->dh_pubkey_e);
644 len[2] = wpabuf_len(wps->dh_pubkey_e);
645 addr[3] = wpabuf_head(wps->dh_pubkey_r);
646 len[3] = wpabuf_len(wps->dh_pubkey_r);
647 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
649 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
650 wpa_printf(MSG_DEBUG, "WPS: R-Hash2 derived from R-S2 does "
651 "not match with the pre-committed value");
652 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
653 wps_pwd_auth_fail_event(wps->wps, 1, 2);
657 wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the second "
658 "half of the device password");
664 static int wps_process_cred_e(struct wps_data *wps, const u8 *cred,
667 struct wps_parse_attr attr;
670 wpa_printf(MSG_DEBUG, "WPS: Received Credential");
671 os_memset(&wps->cred, 0, sizeof(wps->cred));
672 wpabuf_set(&msg, cred, cred_len);
673 if (wps_parse_msg(&msg, &attr) < 0 ||
674 wps_process_cred(&attr, &wps->cred))
677 if (wps->wps->cred_cb) {
678 wps->cred.cred_attr = cred - 4;
679 wps->cred.cred_attr_len = cred_len + 4;
680 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
681 wps->cred.cred_attr = NULL;
682 wps->cred.cred_attr_len = 0;
689 static int wps_process_creds(struct wps_data *wps, const u8 *cred[],
690 size_t cred_len[], size_t num_cred)
698 wpa_printf(MSG_DEBUG, "WPS: No Credential attributes "
703 for (i = 0; i < num_cred; i++) {
704 if (wps_process_cred_e(wps, cred[i], cred_len[i]))
712 static int wps_process_ap_settings_e(struct wps_data *wps,
713 struct wps_parse_attr *attr,
714 struct wpabuf *attrs)
716 struct wps_credential cred;
721 if (wps_process_ap_settings(attr, &cred) < 0)
724 wpa_printf(MSG_INFO, "WPS: Received new AP configuration from "
727 if (wps->wps->cred_cb) {
728 cred.cred_attr = wpabuf_head(attrs);
729 cred.cred_attr_len = wpabuf_len(attrs);
730 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
737 static enum wps_process_res wps_process_m2(struct wps_data *wps,
738 const struct wpabuf *msg,
739 struct wps_parse_attr *attr)
741 wpa_printf(MSG_DEBUG, "WPS: Received M2");
743 if (wps->state != RECV_M2) {
744 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
745 "receiving M2", wps->state);
746 wps->state = SEND_WSC_NACK;
750 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
751 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
752 wps_process_uuid_r(wps, attr->uuid_r) ||
753 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
754 wps_process_authenticator(wps, attr->authenticator, msg)) {
755 wps->state = SEND_WSC_NACK;
759 if (wps->wps->ap && wps->wps->ap_setup_locked) {
760 wpa_printf(MSG_DEBUG, "WPS: AP Setup is locked - refuse "
761 "registration of a new Registrar");
762 wps->config_error = WPS_CFG_SETUP_LOCKED;
763 wps->state = SEND_WSC_NACK;
767 wps->state = SEND_M3;
772 static enum wps_process_res wps_process_m2d(struct wps_data *wps,
773 struct wps_parse_attr *attr)
775 wpa_printf(MSG_DEBUG, "WPS: Received M2D");
777 if (wps->state != RECV_M2) {
778 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
779 "receiving M2D", wps->state);
780 wps->state = SEND_WSC_NACK;
784 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Manufacturer",
785 attr->manufacturer, attr->manufacturer_len);
786 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Name",
787 attr->model_name, attr->model_name_len);
788 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Number",
789 attr->model_number, attr->model_number_len);
790 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Serial Number",
791 attr->serial_number, attr->serial_number_len);
792 wpa_hexdump_ascii(MSG_DEBUG, "WPS: Device Name",
793 attr->dev_name, attr->dev_name_len);
795 if (wps->wps->event_cb) {
796 union wps_event_data data;
797 struct wps_event_m2d *m2d = &data.m2d;
798 os_memset(&data, 0, sizeof(data));
799 if (attr->config_methods)
800 m2d->config_methods =
801 WPA_GET_BE16(attr->config_methods);
802 m2d->manufacturer = attr->manufacturer;
803 m2d->manufacturer_len = attr->manufacturer_len;
804 m2d->model_name = attr->model_name;
805 m2d->model_name_len = attr->model_name_len;
806 m2d->model_number = attr->model_number;
807 m2d->model_number_len = attr->model_number_len;
808 m2d->serial_number = attr->serial_number;
809 m2d->serial_number_len = attr->serial_number_len;
810 m2d->dev_name = attr->dev_name;
811 m2d->dev_name_len = attr->dev_name_len;
812 m2d->primary_dev_type = attr->primary_dev_type;
813 if (attr->config_error)
815 WPA_GET_BE16(attr->config_error);
816 if (attr->dev_password_id)
817 m2d->dev_password_id =
818 WPA_GET_BE16(attr->dev_password_id);
819 wps->wps->event_cb(wps->wps->cb_ctx, WPS_EV_M2D, &data);
822 wps->state = RECEIVED_M2D;
827 static enum wps_process_res wps_process_m4(struct wps_data *wps,
828 const struct wpabuf *msg,
829 struct wps_parse_attr *attr)
831 struct wpabuf *decrypted;
832 struct wps_parse_attr eattr;
834 wpa_printf(MSG_DEBUG, "WPS: Received M4");
836 if (wps->state != RECV_M4) {
837 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
838 "receiving M4", wps->state);
839 wps->state = SEND_WSC_NACK;
843 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
844 wps_process_authenticator(wps, attr->authenticator, msg) ||
845 wps_process_r_hash1(wps, attr->r_hash1) ||
846 wps_process_r_hash2(wps, attr->r_hash2)) {
847 wps->state = SEND_WSC_NACK;
851 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
852 attr->encr_settings_len);
853 if (decrypted == NULL) {
854 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
855 "Settings attribute");
856 wps->state = SEND_WSC_NACK;
860 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
862 if (wps_parse_msg(decrypted, &eattr) < 0 ||
863 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
864 wps_process_r_snonce1(wps, eattr.r_snonce1)) {
865 wpabuf_free(decrypted);
866 wps->state = SEND_WSC_NACK;
869 wpabuf_free(decrypted);
871 wps->state = SEND_M5;
876 static enum wps_process_res wps_process_m6(struct wps_data *wps,
877 const struct wpabuf *msg,
878 struct wps_parse_attr *attr)
880 struct wpabuf *decrypted;
881 struct wps_parse_attr eattr;
883 wpa_printf(MSG_DEBUG, "WPS: Received M6");
885 if (wps->state != RECV_M6) {
886 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
887 "receiving M6", wps->state);
888 wps->state = SEND_WSC_NACK;
892 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
893 wps_process_authenticator(wps, attr->authenticator, msg)) {
894 wps->state = SEND_WSC_NACK;
898 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
899 attr->encr_settings_len);
900 if (decrypted == NULL) {
901 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
902 "Settings attribute");
903 wps->state = SEND_WSC_NACK;
907 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
909 if (wps_parse_msg(decrypted, &eattr) < 0 ||
910 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
911 wps_process_r_snonce2(wps, eattr.r_snonce2)) {
912 wpabuf_free(decrypted);
913 wps->state = SEND_WSC_NACK;
916 wpabuf_free(decrypted);
918 wps->state = SEND_M7;
923 static enum wps_process_res wps_process_m8(struct wps_data *wps,
924 const struct wpabuf *msg,
925 struct wps_parse_attr *attr)
927 struct wpabuf *decrypted;
928 struct wps_parse_attr eattr;
930 wpa_printf(MSG_DEBUG, "WPS: Received M8");
932 if (wps->state != RECV_M8) {
933 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
934 "receiving M8", wps->state);
935 wps->state = SEND_WSC_NACK;
939 if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
940 wps_process_authenticator(wps, attr->authenticator, msg)) {
941 wps->state = SEND_WSC_NACK;
945 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
946 attr->encr_settings_len);
947 if (decrypted == NULL) {
948 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
949 "Settings attribute");
950 wps->state = SEND_WSC_NACK;
954 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
956 if (wps_parse_msg(decrypted, &eattr) < 0 ||
957 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
958 wps_process_creds(wps, eattr.cred, eattr.cred_len,
960 wps_process_ap_settings_e(wps, &eattr, decrypted)) {
961 wpabuf_free(decrypted);
962 wps->state = SEND_WSC_NACK;
965 wpabuf_free(decrypted);
967 wps->state = WPS_MSG_DONE;
972 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
973 const struct wpabuf *msg)
975 struct wps_parse_attr attr;
976 enum wps_process_res ret = WPS_CONTINUE;
978 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
980 if (wps_parse_msg(msg, &attr) < 0)
983 if (!wps_version_supported(attr.version)) {
984 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
985 attr.version ? *attr.version : 0);
989 if (attr.enrollee_nonce == NULL ||
990 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
991 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
995 if (attr.msg_type == NULL) {
996 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1000 switch (*attr.msg_type) {
1002 ret = wps_process_m2(wps, msg, &attr);
1005 ret = wps_process_m2d(wps, &attr);
1008 ret = wps_process_m4(wps, msg, &attr);
1009 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1010 wps_fail_event(wps->wps, WPS_M4);
1013 ret = wps_process_m6(wps, msg, &attr);
1014 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1015 wps_fail_event(wps->wps, WPS_M6);
1018 ret = wps_process_m8(wps, msg, &attr);
1019 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
1020 wps_fail_event(wps->wps, WPS_M8);
1023 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
1029 * Save a copy of the last message for Authenticator derivation if we
1030 * are continuing. However, skip M2D since it is not authenticated and
1031 * neither is the ACK/NACK response frame. This allows the possibly
1032 * following M2 to be processed correctly by using the previously sent
1033 * M1 in Authenticator derivation.
1035 if (ret == WPS_CONTINUE && *attr.msg_type != WPS_M2D) {
1036 /* Save a copy of the last message for Authenticator derivation
1038 wpabuf_free(wps->last_msg);
1039 wps->last_msg = wpabuf_dup(msg);
1046 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
1047 const struct wpabuf *msg)
1049 struct wps_parse_attr attr;
1051 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
1053 if (wps_parse_msg(msg, &attr) < 0)
1056 if (!wps_version_supported(attr.version)) {
1057 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1058 attr.version ? *attr.version : 0);
1062 if (attr.msg_type == NULL) {
1063 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1067 if (*attr.msg_type != WPS_WSC_ACK) {
1068 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1073 if (attr.registrar_nonce == NULL ||
1074 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1076 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1080 if (attr.enrollee_nonce == NULL ||
1081 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1082 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1086 if (wps->state == RECV_ACK && wps->wps->ap) {
1087 wpa_printf(MSG_DEBUG, "WPS: External Registrar registration "
1088 "completed successfully");
1089 wps_success_event(wps->wps);
1090 wps->state = WPS_FINISHED;
1098 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
1099 const struct wpabuf *msg)
1101 struct wps_parse_attr attr;
1103 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
1105 if (wps_parse_msg(msg, &attr) < 0)
1108 if (!wps_version_supported(attr.version)) {
1109 wpa_printf(MSG_DEBUG, "WPS: Unsupported message version 0x%x",
1110 attr.version ? *attr.version : 0);
1114 if (attr.msg_type == NULL) {
1115 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
1119 if (*attr.msg_type != WPS_WSC_NACK) {
1120 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
1125 if (attr.registrar_nonce == NULL ||
1126 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
1128 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
1129 wpa_hexdump(MSG_DEBUG, "WPS: Received Registrar Nonce",
1130 attr.registrar_nonce, WPS_NONCE_LEN);
1131 wpa_hexdump(MSG_DEBUG, "WPS: Expected Registrar Nonce",
1132 wps->nonce_r, WPS_NONCE_LEN);
1136 if (attr.enrollee_nonce == NULL ||
1137 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
1138 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
1139 wpa_hexdump(MSG_DEBUG, "WPS: Received Enrollee Nonce",
1140 attr.enrollee_nonce, WPS_NONCE_LEN);
1141 wpa_hexdump(MSG_DEBUG, "WPS: Expected Enrollee Nonce",
1142 wps->nonce_e, WPS_NONCE_LEN);
1146 if (attr.config_error == NULL) {
1147 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
1152 wpa_printf(MSG_DEBUG, "WPS: Registrar terminated negotiation with "
1153 "Configuration Error %d", WPA_GET_BE16(attr.config_error));
1155 switch (wps->state) {
1157 wps_fail_event(wps->wps, WPS_M3);
1160 wps_fail_event(wps->wps, WPS_M5);
1163 wps_fail_event(wps->wps, WPS_M7);
1169 /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
1170 * Enrollee is Authenticator */
1171 wps->state = SEND_WSC_NACK;
1177 enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
1178 enum wsc_op_code op_code,
1179 const struct wpabuf *msg)
1182 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
1184 (unsigned long) wpabuf_len(msg), op_code);
1189 return wps_process_wsc_msg(wps, msg);
1191 return wps_process_wsc_ack(wps, msg);
1193 return wps_process_wsc_nack(wps, msg);
1195 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);