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 */
139 methods
|= WPS_CONFIG_PUSHBUTTON
;
141 if (wps_build_version(msg
) ||
142 wps_build_msg_type(msg
, WPS_M1
) ||
143 wps_build_uuid_e(msg
, wps
->uuid_e
) ||
144 wps_build_mac_addr(wps
, msg
) ||
145 wps_build_enrollee_nonce(wps
, msg
) ||
146 wps_build_public_key(wps
, msg
) ||
147 wps_build_auth_type_flags(wps
, msg
) ||
148 wps_build_encr_type_flags(wps
, msg
) ||
149 wps_build_conn_type_flags(wps
, msg
) ||
150 wps_build_config_methods(msg
, methods
) ||
151 wps_build_wps_state(wps
, msg
) ||
152 wps_build_device_attrs(&wps
->wps
->dev
, msg
) ||
153 wps_build_rf_bands(&wps
->wps
->dev
, msg
) ||
154 wps_build_assoc_state(wps
, msg
) ||
155 wps_build_dev_password_id(msg
, wps
->dev_pw_id
) ||
156 wps_build_config_error(msg
, WPS_CFG_NO_ERROR
) ||
157 wps_build_os_version(&wps
->wps
->dev
, msg
)) {
162 wps
->state
= RECV_M2
;
167 static struct wpabuf
* wps_build_m3(struct wps_data
*wps
)
171 wpa_printf(MSG_DEBUG
, "WPS: Building Message M3");
173 if (wps
->dev_password
== NULL
) {
174 wpa_printf(MSG_DEBUG
, "WPS: No Device Password available");
177 wps_derive_psk(wps
, wps
->dev_password
, wps
->dev_password_len
);
179 msg
= wpabuf_alloc(1000);
183 if (wps_build_version(msg
) ||
184 wps_build_msg_type(msg
, WPS_M3
) ||
185 wps_build_registrar_nonce(wps
, msg
) ||
186 wps_build_e_hash(wps
, msg
) ||
187 wps_build_authenticator(wps
, msg
)) {
192 wps
->state
= RECV_M4
;
197 static struct wpabuf
* wps_build_m5(struct wps_data
*wps
)
199 struct wpabuf
*msg
, *plain
;
201 wpa_printf(MSG_DEBUG
, "WPS: Building Message M5");
203 plain
= wpabuf_alloc(200);
207 msg
= wpabuf_alloc(1000);
213 if (wps_build_version(msg
) ||
214 wps_build_msg_type(msg
, WPS_M5
) ||
215 wps_build_registrar_nonce(wps
, msg
) ||
216 wps_build_e_snonce1(wps
, plain
) ||
217 wps_build_key_wrap_auth(wps
, plain
) ||
218 wps_build_encr_settings(wps
, msg
, plain
) ||
219 wps_build_authenticator(wps
, msg
)) {
226 wps
->state
= RECV_M6
;
231 static int wps_build_cred_ssid(struct wps_data
*wps
, struct wpabuf
*msg
)
233 wpa_printf(MSG_DEBUG
, "WPS: * SSID");
234 wpabuf_put_be16(msg
, ATTR_SSID
);
235 wpabuf_put_be16(msg
, wps
->wps
->ssid_len
);
236 wpabuf_put_data(msg
, wps
->wps
->ssid
, wps
->wps
->ssid_len
);
241 static int wps_build_cred_auth_type(struct wps_data
*wps
, struct wpabuf
*msg
)
243 wpa_printf(MSG_DEBUG
, "WPS: * Authentication Type");
244 wpabuf_put_be16(msg
, ATTR_AUTH_TYPE
);
245 wpabuf_put_be16(msg
, 2);
246 wpabuf_put_be16(msg
, wps
->wps
->auth_types
);
251 static int wps_build_cred_encr_type(struct wps_data
*wps
, struct wpabuf
*msg
)
253 wpa_printf(MSG_DEBUG
, "WPS: * Encryption Type");
254 wpabuf_put_be16(msg
, ATTR_ENCR_TYPE
);
255 wpabuf_put_be16(msg
, 2);
256 wpabuf_put_be16(msg
, wps
->wps
->encr_types
);
261 static int wps_build_cred_network_key(struct wps_data
*wps
, struct wpabuf
*msg
)
263 wpa_printf(MSG_DEBUG
, "WPS: * Network Key");
264 wpabuf_put_be16(msg
, ATTR_NETWORK_KEY
);
265 wpabuf_put_be16(msg
, wps
->wps
->network_key_len
);
266 wpabuf_put_data(msg
, wps
->wps
->network_key
, wps
->wps
->network_key_len
);
271 static int wps_build_cred_mac_addr(struct wps_data
*wps
, struct wpabuf
*msg
)
273 wpa_printf(MSG_DEBUG
, "WPS: * MAC Address (AP BSSID)");
274 wpabuf_put_be16(msg
, ATTR_MAC_ADDR
);
275 wpabuf_put_be16(msg
, ETH_ALEN
);
276 wpabuf_put_data(msg
, wps
->wps
->dev
.mac_addr
, ETH_ALEN
);
281 static int wps_build_ap_settings(struct wps_data
*wps
, struct wpabuf
*plain
)
283 if (wps
->wps
->ap_settings
) {
284 wpa_printf(MSG_DEBUG
, "WPS: * AP Settings (pre-configured)");
285 wpabuf_put_data(plain
, wps
->wps
->ap_settings
,
286 wps
->wps
->ap_settings_len
);
290 return wps_build_cred_ssid(wps
, plain
) ||
291 wps_build_cred_mac_addr(wps
, plain
) ||
292 wps_build_cred_auth_type(wps
, plain
) ||
293 wps_build_cred_encr_type(wps
, plain
) ||
294 wps_build_cred_network_key(wps
, plain
);
298 static struct wpabuf
* wps_build_m7(struct wps_data
*wps
)
300 struct wpabuf
*msg
, *plain
;
302 wpa_printf(MSG_DEBUG
, "WPS: Building Message M7");
304 plain
= wpabuf_alloc(500 + wps
->wps
->ap_settings_len
);
308 msg
= wpabuf_alloc(1000 + wps
->wps
->ap_settings_len
);
314 if (wps_build_version(msg
) ||
315 wps_build_msg_type(msg
, WPS_M7
) ||
316 wps_build_registrar_nonce(wps
, msg
) ||
317 wps_build_e_snonce2(wps
, plain
) ||
318 (wps
->wps
->ap
&& wps_build_ap_settings(wps
, plain
)) ||
319 wps_build_key_wrap_auth(wps
, plain
) ||
320 wps_build_encr_settings(wps
, msg
, plain
) ||
321 wps_build_authenticator(wps
, msg
)) {
328 wps
->state
= RECV_M8
;
333 static struct wpabuf
* wps_build_wsc_done(struct wps_data
*wps
)
337 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_Done");
339 msg
= wpabuf_alloc(1000);
343 if (wps_build_version(msg
) ||
344 wps_build_msg_type(msg
, WPS_WSC_DONE
) ||
345 wps_build_enrollee_nonce(wps
, msg
) ||
346 wps_build_registrar_nonce(wps
, msg
)) {
352 wps
->state
= RECV_ACK
;
354 wps_success_event(wps
->wps
);
355 wps
->state
= WPS_FINISHED
;
361 static struct wpabuf
* wps_build_wsc_ack(struct wps_data
*wps
)
365 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_ACK");
367 msg
= wpabuf_alloc(1000);
371 if (wps_build_version(msg
) ||
372 wps_build_msg_type(msg
, WPS_WSC_ACK
) ||
373 wps_build_enrollee_nonce(wps
, msg
) ||
374 wps_build_registrar_nonce(wps
, msg
)) {
383 static struct wpabuf
* wps_build_wsc_nack(struct wps_data
*wps
)
387 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_NACK");
389 msg
= wpabuf_alloc(1000);
393 if (wps_build_version(msg
) ||
394 wps_build_msg_type(msg
, WPS_WSC_NACK
) ||
395 wps_build_enrollee_nonce(wps
, msg
) ||
396 wps_build_registrar_nonce(wps
, msg
) ||
397 wps_build_config_error(msg
, wps
->config_error
)) {
406 struct wpabuf
* wps_enrollee_get_msg(struct wps_data
*wps
,
407 enum wsc_op_code
*op_code
)
411 switch (wps
->state
) {
413 msg
= wps_build_m1(wps
);
417 msg
= wps_build_m3(wps
);
421 msg
= wps_build_m5(wps
);
425 msg
= wps_build_m7(wps
);
430 msg
= wps_build_wsc_nack(wps
);
434 msg
= wps_build_wsc_ack(wps
);
437 /* Another M2/M2D may be received */
438 wps
->state
= RECV_M2
;
442 msg
= wps_build_wsc_nack(wps
);
446 msg
= wps_build_wsc_done(wps
);
450 wpa_printf(MSG_DEBUG
, "WPS: Unsupported state %d for building "
451 "a message", wps
->state
);
456 if (*op_code
== WSC_MSG
&& msg
) {
457 /* Save a copy of the last message for Authenticator derivation
459 wpabuf_free(wps
->last_msg
);
460 wps
->last_msg
= wpabuf_dup(msg
);
467 static int wps_process_registrar_nonce(struct wps_data
*wps
, const u8
*r_nonce
)
469 if (r_nonce
== NULL
) {
470 wpa_printf(MSG_DEBUG
, "WPS: No Registrar Nonce received");
474 os_memcpy(wps
->nonce_r
, r_nonce
, WPS_NONCE_LEN
);
475 wpa_hexdump(MSG_DEBUG
, "WPS: Registrar Nonce",
476 wps
->nonce_r
, WPS_NONCE_LEN
);
482 static int wps_process_enrollee_nonce(struct wps_data
*wps
, const u8
*e_nonce
)
484 if (e_nonce
== NULL
) {
485 wpa_printf(MSG_DEBUG
, "WPS: No Enrollee Nonce received");
489 if (os_memcmp(wps
->nonce_e
, e_nonce
, WPS_NONCE_LEN
) != 0) {
490 wpa_printf(MSG_DEBUG
, "WPS: Invalid Enrollee Nonce received");
498 static int wps_process_uuid_r(struct wps_data
*wps
, const u8
*uuid_r
)
500 if (uuid_r
== NULL
) {
501 wpa_printf(MSG_DEBUG
, "WPS: No UUID-R received");
505 os_memcpy(wps
->uuid_r
, uuid_r
, WPS_UUID_LEN
);
506 wpa_hexdump(MSG_DEBUG
, "WPS: UUID-R", wps
->uuid_r
, WPS_UUID_LEN
);
512 static int wps_process_pubkey(struct wps_data
*wps
, const u8
*pk
,
515 if (pk
== NULL
|| pk_len
== 0) {
516 wpa_printf(MSG_DEBUG
, "WPS: No Public Key received");
520 #ifdef CONFIG_WPS_OOB
521 if (wps
->dev_pw_id
!= DEV_PW_DEFAULT
&&
522 wps
->wps
->oob_conf
.pubkey_hash
) {
524 u8 hash
[WPS_HASH_LEN
];
527 sha256_vector(1, addr
, &pk_len
, hash
);
529 wpabuf_head(wps
->wps
->oob_conf
.pubkey_hash
),
530 WPS_OOB_PUBKEY_HASH_LEN
) != 0) {
531 wpa_printf(MSG_ERROR
, "WPS: Public Key hash error");
535 #endif /* CONFIG_WPS_OOB */
537 wpabuf_free(wps
->dh_pubkey_r
);
538 wps
->dh_pubkey_r
= wpabuf_alloc_copy(pk
, pk_len
);
539 if (wps
->dh_pubkey_r
== NULL
)
542 if (wps_derive_keys(wps
) < 0)
545 if (wps
->request_type
== WPS_REQ_WLAN_MANAGER_REGISTRAR
&&
546 wps_derive_mgmt_keys(wps
) < 0)
553 static int wps_process_r_hash1(struct wps_data
*wps
, const u8
*r_hash1
)
555 if (r_hash1
== NULL
) {
556 wpa_printf(MSG_DEBUG
, "WPS: No R-Hash1 received");
560 os_memcpy(wps
->peer_hash1
, r_hash1
, WPS_HASH_LEN
);
561 wpa_hexdump(MSG_DEBUG
, "WPS: R-Hash1", wps
->peer_hash1
, WPS_HASH_LEN
);
567 static int wps_process_r_hash2(struct wps_data
*wps
, const u8
*r_hash2
)
569 if (r_hash2
== NULL
) {
570 wpa_printf(MSG_DEBUG
, "WPS: No R-Hash2 received");
574 os_memcpy(wps
->peer_hash2
, r_hash2
, WPS_HASH_LEN
);
575 wpa_hexdump(MSG_DEBUG
, "WPS: R-Hash2", wps
->peer_hash2
, WPS_HASH_LEN
);
581 static int wps_process_r_snonce1(struct wps_data
*wps
, const u8
*r_snonce1
)
583 u8 hash
[SHA256_MAC_LEN
];
587 if (r_snonce1
== NULL
) {
588 wpa_printf(MSG_DEBUG
, "WPS: No R-SNonce1 received");
592 wpa_hexdump_key(MSG_DEBUG
, "WPS: R-SNonce1", r_snonce1
,
593 WPS_SECRET_NONCE_LEN
);
595 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
597 len
[0] = WPS_SECRET_NONCE_LEN
;
599 len
[1] = WPS_PSK_LEN
;
600 addr
[2] = wpabuf_head(wps
->dh_pubkey_e
);
601 len
[2] = wpabuf_len(wps
->dh_pubkey_e
);
602 addr
[3] = wpabuf_head(wps
->dh_pubkey_r
);
603 len
[3] = wpabuf_len(wps
->dh_pubkey_r
);
604 hmac_sha256_vector(wps
->authkey
, WPS_AUTHKEY_LEN
, 4, addr
, len
, hash
);
606 if (os_memcmp(wps
->peer_hash1
, hash
, WPS_HASH_LEN
) != 0) {
607 wpa_printf(MSG_DEBUG
, "WPS: R-Hash1 derived from R-S1 does "
608 "not match with the pre-committed value");
609 wps
->config_error
= WPS_CFG_DEV_PASSWORD_AUTH_FAILURE
;
610 wps_pwd_auth_fail_event(wps
->wps
, 1, 1);
614 wpa_printf(MSG_DEBUG
, "WPS: Registrar proved knowledge of the first "
615 "half of the device password");
621 static int wps_process_r_snonce2(struct wps_data
*wps
, const u8
*r_snonce2
)
623 u8 hash
[SHA256_MAC_LEN
];
627 if (r_snonce2
== NULL
) {
628 wpa_printf(MSG_DEBUG
, "WPS: No R-SNonce2 received");
632 wpa_hexdump_key(MSG_DEBUG
, "WPS: R-SNonce2", r_snonce2
,
633 WPS_SECRET_NONCE_LEN
);
635 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
637 len
[0] = WPS_SECRET_NONCE_LEN
;
639 len
[1] = WPS_PSK_LEN
;
640 addr
[2] = wpabuf_head(wps
->dh_pubkey_e
);
641 len
[2] = wpabuf_len(wps
->dh_pubkey_e
);
642 addr
[3] = wpabuf_head(wps
->dh_pubkey_r
);
643 len
[3] = wpabuf_len(wps
->dh_pubkey_r
);
644 hmac_sha256_vector(wps
->authkey
, WPS_AUTHKEY_LEN
, 4, addr
, len
, hash
);
646 if (os_memcmp(wps
->peer_hash2
, hash
, WPS_HASH_LEN
) != 0) {
647 wpa_printf(MSG_DEBUG
, "WPS: R-Hash2 derived from R-S2 does "
648 "not match with the pre-committed value");
649 wps
->config_error
= WPS_CFG_DEV_PASSWORD_AUTH_FAILURE
;
650 wps_pwd_auth_fail_event(wps
->wps
, 1, 2);
654 wpa_printf(MSG_DEBUG
, "WPS: Registrar proved knowledge of the second "
655 "half of the device password");
661 static int wps_process_cred_e(struct wps_data
*wps
, const u8
*cred
,
664 struct wps_parse_attr attr
;
667 wpa_printf(MSG_DEBUG
, "WPS: Received Credential");
668 os_memset(&wps
->cred
, 0, sizeof(wps
->cred
));
669 wpabuf_set(&msg
, cred
, cred_len
);
670 if (wps_parse_msg(&msg
, &attr
) < 0 ||
671 wps_process_cred(&attr
, &wps
->cred
))
674 if (wps
->wps
->cred_cb
) {
675 wps
->cred
.cred_attr
= cred
- 4;
676 wps
->cred
.cred_attr_len
= cred_len
+ 4;
677 wps
->wps
->cred_cb(wps
->wps
->cb_ctx
, &wps
->cred
);
678 wps
->cred
.cred_attr
= NULL
;
679 wps
->cred
.cred_attr_len
= 0;
686 static int wps_process_creds(struct wps_data
*wps
, const u8
*cred
[],
687 size_t cred_len
[], size_t num_cred
)
695 wpa_printf(MSG_DEBUG
, "WPS: No Credential attributes "
700 for (i
= 0; i
< num_cred
; i
++) {
701 if (wps_process_cred_e(wps
, cred
[i
], cred_len
[i
]))
709 static int wps_process_ap_settings_e(struct wps_data
*wps
,
710 struct wps_parse_attr
*attr
,
711 struct wpabuf
*attrs
)
713 struct wps_credential cred
;
718 if (wps_process_ap_settings(attr
, &cred
) < 0)
721 wpa_printf(MSG_INFO
, "WPS: Received new AP configuration from "
724 if (wps
->wps
->cred_cb
) {
725 cred
.cred_attr
= wpabuf_head(attrs
);
726 cred
.cred_attr_len
= wpabuf_len(attrs
);
727 wps
->wps
->cred_cb(wps
->wps
->cb_ctx
, &cred
);
734 static enum wps_process_res
wps_process_m2(struct wps_data
*wps
,
735 const struct wpabuf
*msg
,
736 struct wps_parse_attr
*attr
)
738 wpa_printf(MSG_DEBUG
, "WPS: Received M2");
740 if (wps
->state
!= RECV_M2
) {
741 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
742 "receiving M2", wps
->state
);
743 wps
->state
= SEND_WSC_NACK
;
747 if (wps_process_registrar_nonce(wps
, attr
->registrar_nonce
) ||
748 wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
749 wps_process_uuid_r(wps
, attr
->uuid_r
) ||
750 wps_process_pubkey(wps
, attr
->public_key
, attr
->public_key_len
) ||
751 wps_process_authenticator(wps
, attr
->authenticator
, msg
)) {
752 wps
->state
= SEND_WSC_NACK
;
756 if (wps
->wps
->ap
&& wps
->wps
->ap_setup_locked
) {
757 wpa_printf(MSG_DEBUG
, "WPS: AP Setup is locked - refuse "
758 "registration of a new Registrar");
759 wps
->config_error
= WPS_CFG_SETUP_LOCKED
;
760 wps
->state
= SEND_WSC_NACK
;
764 wps
->state
= SEND_M3
;
769 static enum wps_process_res
wps_process_m2d(struct wps_data
*wps
,
770 struct wps_parse_attr
*attr
)
772 wpa_printf(MSG_DEBUG
, "WPS: Received M2D");
774 if (wps
->state
!= RECV_M2
) {
775 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
776 "receiving M2D", wps
->state
);
777 wps
->state
= SEND_WSC_NACK
;
781 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Manufacturer",
782 attr
->manufacturer
, attr
->manufacturer_len
);
783 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Model Name",
784 attr
->model_name
, attr
->model_name_len
);
785 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Model Number",
786 attr
->model_number
, attr
->model_number_len
);
787 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Serial Number",
788 attr
->serial_number
, attr
->serial_number_len
);
789 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Device Name",
790 attr
->dev_name
, attr
->dev_name_len
);
792 if (wps
->wps
->event_cb
) {
793 union wps_event_data data
;
794 struct wps_event_m2d
*m2d
= &data
.m2d
;
795 os_memset(&data
, 0, sizeof(data
));
796 if (attr
->config_methods
)
797 m2d
->config_methods
=
798 WPA_GET_BE16(attr
->config_methods
);
799 m2d
->manufacturer
= attr
->manufacturer
;
800 m2d
->manufacturer_len
= attr
->manufacturer_len
;
801 m2d
->model_name
= attr
->model_name
;
802 m2d
->model_name_len
= attr
->model_name_len
;
803 m2d
->model_number
= attr
->model_number
;
804 m2d
->model_number_len
= attr
->model_number_len
;
805 m2d
->serial_number
= attr
->serial_number
;
806 m2d
->serial_number_len
= attr
->serial_number_len
;
807 m2d
->dev_name
= attr
->dev_name
;
808 m2d
->dev_name_len
= attr
->dev_name_len
;
809 m2d
->primary_dev_type
= attr
->primary_dev_type
;
810 if (attr
->config_error
)
812 WPA_GET_BE16(attr
->config_error
);
813 if (attr
->dev_password_id
)
814 m2d
->dev_password_id
=
815 WPA_GET_BE16(attr
->dev_password_id
);
816 wps
->wps
->event_cb(wps
->wps
->cb_ctx
, WPS_EV_M2D
, &data
);
819 wps
->state
= RECEIVED_M2D
;
824 static enum wps_process_res
wps_process_m4(struct wps_data
*wps
,
825 const struct wpabuf
*msg
,
826 struct wps_parse_attr
*attr
)
828 struct wpabuf
*decrypted
;
829 struct wps_parse_attr eattr
;
831 wpa_printf(MSG_DEBUG
, "WPS: Received M4");
833 if (wps
->state
!= RECV_M4
) {
834 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
835 "receiving M4", wps
->state
);
836 wps
->state
= SEND_WSC_NACK
;
840 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
841 wps_process_authenticator(wps
, attr
->authenticator
, msg
) ||
842 wps_process_r_hash1(wps
, attr
->r_hash1
) ||
843 wps_process_r_hash2(wps
, attr
->r_hash2
)) {
844 wps
->state
= SEND_WSC_NACK
;
848 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
849 attr
->encr_settings_len
);
850 if (decrypted
== NULL
) {
851 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
852 "Settings attribute");
853 wps
->state
= SEND_WSC_NACK
;
857 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
859 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
860 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
861 wps_process_r_snonce1(wps
, eattr
.r_snonce1
)) {
862 wpabuf_free(decrypted
);
863 wps
->state
= SEND_WSC_NACK
;
866 wpabuf_free(decrypted
);
868 wps
->state
= SEND_M5
;
873 static enum wps_process_res
wps_process_m6(struct wps_data
*wps
,
874 const struct wpabuf
*msg
,
875 struct wps_parse_attr
*attr
)
877 struct wpabuf
*decrypted
;
878 struct wps_parse_attr eattr
;
880 wpa_printf(MSG_DEBUG
, "WPS: Received M6");
882 if (wps
->state
!= RECV_M6
) {
883 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
884 "receiving M6", wps
->state
);
885 wps
->state
= SEND_WSC_NACK
;
889 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
890 wps_process_authenticator(wps
, attr
->authenticator
, msg
)) {
891 wps
->state
= SEND_WSC_NACK
;
895 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
896 attr
->encr_settings_len
);
897 if (decrypted
== NULL
) {
898 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
899 "Settings attribute");
900 wps
->state
= SEND_WSC_NACK
;
904 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
906 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
907 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
908 wps_process_r_snonce2(wps
, eattr
.r_snonce2
)) {
909 wpabuf_free(decrypted
);
910 wps
->state
= SEND_WSC_NACK
;
913 wpabuf_free(decrypted
);
915 wps
->state
= SEND_M7
;
920 static enum wps_process_res
wps_process_m8(struct wps_data
*wps
,
921 const struct wpabuf
*msg
,
922 struct wps_parse_attr
*attr
)
924 struct wpabuf
*decrypted
;
925 struct wps_parse_attr eattr
;
927 wpa_printf(MSG_DEBUG
, "WPS: Received M8");
929 if (wps
->state
!= RECV_M8
) {
930 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
931 "receiving M8", wps
->state
);
932 wps
->state
= SEND_WSC_NACK
;
936 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
937 wps_process_authenticator(wps
, attr
->authenticator
, msg
)) {
938 wps
->state
= SEND_WSC_NACK
;
942 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
943 attr
->encr_settings_len
);
944 if (decrypted
== NULL
) {
945 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
946 "Settings attribute");
947 wps
->state
= SEND_WSC_NACK
;
951 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
953 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
954 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
955 wps_process_creds(wps
, eattr
.cred
, eattr
.cred_len
,
957 wps_process_ap_settings_e(wps
, &eattr
, decrypted
)) {
958 wpabuf_free(decrypted
);
959 wps
->state
= SEND_WSC_NACK
;
962 wpabuf_free(decrypted
);
964 wps
->state
= WPS_MSG_DONE
;
969 static enum wps_process_res
wps_process_wsc_msg(struct wps_data
*wps
,
970 const struct wpabuf
*msg
)
972 struct wps_parse_attr attr
;
973 enum wps_process_res ret
= WPS_CONTINUE
;
975 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_MSG");
977 if (wps_parse_msg(msg
, &attr
) < 0)
980 if (!wps_version_supported(attr
.version
)) {
981 wpa_printf(MSG_DEBUG
, "WPS: Unsupported message version 0x%x",
982 attr
.version
? *attr
.version
: 0);
986 if (attr
.enrollee_nonce
== NULL
||
987 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
988 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
992 if (attr
.msg_type
== NULL
) {
993 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
997 switch (*attr
.msg_type
) {
999 ret
= wps_process_m2(wps
, msg
, &attr
);
1002 ret
= wps_process_m2d(wps
, &attr
);
1005 ret
= wps_process_m4(wps
, msg
, &attr
);
1006 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1007 wps_fail_event(wps
->wps
, WPS_M4
);
1010 ret
= wps_process_m6(wps
, msg
, &attr
);
1011 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1012 wps_fail_event(wps
->wps
, WPS_M6
);
1015 ret
= wps_process_m8(wps
, msg
, &attr
);
1016 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1017 wps_fail_event(wps
->wps
, WPS_M8
);
1020 wpa_printf(MSG_DEBUG
, "WPS: Unsupported Message Type %d",
1026 * Save a copy of the last message for Authenticator derivation if we
1027 * are continuing. However, skip M2D since it is not authenticated and
1028 * neither is the ACK/NACK response frame. This allows the possibly
1029 * following M2 to be processed correctly by using the previously sent
1030 * M1 in Authenticator derivation.
1032 if (ret
== WPS_CONTINUE
&& *attr
.msg_type
!= WPS_M2D
) {
1033 /* Save a copy of the last message for Authenticator derivation
1035 wpabuf_free(wps
->last_msg
);
1036 wps
->last_msg
= wpabuf_dup(msg
);
1043 static enum wps_process_res
wps_process_wsc_ack(struct wps_data
*wps
,
1044 const struct wpabuf
*msg
)
1046 struct wps_parse_attr attr
;
1048 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_ACK");
1050 if (wps_parse_msg(msg
, &attr
) < 0)
1053 if (!wps_version_supported(attr
.version
)) {
1054 wpa_printf(MSG_DEBUG
, "WPS: Unsupported message version 0x%x",
1055 attr
.version
? *attr
.version
: 0);
1059 if (attr
.msg_type
== NULL
) {
1060 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
1064 if (*attr
.msg_type
!= WPS_WSC_ACK
) {
1065 wpa_printf(MSG_DEBUG
, "WPS: Invalid Message Type %d",
1070 if (attr
.registrar_nonce
== NULL
||
1071 os_memcmp(wps
->nonce_r
, attr
.registrar_nonce
, WPS_NONCE_LEN
!= 0))
1073 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in registrar nonce");
1077 if (attr
.enrollee_nonce
== NULL
||
1078 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
1079 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
1083 if (wps
->state
== RECV_ACK
&& wps
->wps
->ap
) {
1084 wpa_printf(MSG_DEBUG
, "WPS: External Registrar registration "
1085 "completed successfully");
1086 wps_success_event(wps
->wps
);
1087 wps
->state
= WPS_FINISHED
;
1095 static enum wps_process_res
wps_process_wsc_nack(struct wps_data
*wps
,
1096 const struct wpabuf
*msg
)
1098 struct wps_parse_attr attr
;
1100 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_NACK");
1102 if (wps_parse_msg(msg
, &attr
) < 0)
1105 if (!wps_version_supported(attr
.version
)) {
1106 wpa_printf(MSG_DEBUG
, "WPS: Unsupported message version 0x%x",
1107 attr
.version
? *attr
.version
: 0);
1111 if (attr
.msg_type
== NULL
) {
1112 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
1116 if (*attr
.msg_type
!= WPS_WSC_NACK
) {
1117 wpa_printf(MSG_DEBUG
, "WPS: Invalid Message Type %d",
1122 if (attr
.registrar_nonce
== NULL
||
1123 os_memcmp(wps
->nonce_r
, attr
.registrar_nonce
, WPS_NONCE_LEN
!= 0))
1125 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in registrar nonce");
1126 wpa_hexdump(MSG_DEBUG
, "WPS: Received Registrar Nonce",
1127 attr
.registrar_nonce
, WPS_NONCE_LEN
);
1128 wpa_hexdump(MSG_DEBUG
, "WPS: Expected Registrar Nonce",
1129 wps
->nonce_r
, WPS_NONCE_LEN
);
1133 if (attr
.enrollee_nonce
== NULL
||
1134 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
1135 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
1136 wpa_hexdump(MSG_DEBUG
, "WPS: Received Enrollee Nonce",
1137 attr
.enrollee_nonce
, WPS_NONCE_LEN
);
1138 wpa_hexdump(MSG_DEBUG
, "WPS: Expected Enrollee Nonce",
1139 wps
->nonce_e
, WPS_NONCE_LEN
);
1143 if (attr
.config_error
== NULL
) {
1144 wpa_printf(MSG_DEBUG
, "WPS: No Configuration Error attribute "
1149 wpa_printf(MSG_DEBUG
, "WPS: Registrar terminated negotiation with "
1150 "Configuration Error %d", WPA_GET_BE16(attr
.config_error
));
1152 switch (wps
->state
) {
1154 wps_fail_event(wps
->wps
, WPS_M3
);
1157 wps_fail_event(wps
->wps
, WPS_M5
);
1160 wps_fail_event(wps
->wps
, WPS_M7
);
1166 /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
1167 * Enrollee is Authenticator */
1168 wps
->state
= SEND_WSC_NACK
;
1174 enum wps_process_res
wps_enrollee_process_msg(struct wps_data
*wps
,
1175 enum wsc_op_code op_code
,
1176 const struct wpabuf
*msg
)
1179 wpa_printf(MSG_DEBUG
, "WPS: Processing received message (len=%lu "
1181 (unsigned long) wpabuf_len(msg
), op_code
);
1186 return wps_process_wsc_msg(wps
, msg
);
1188 return wps_process_wsc_ack(wps
, msg
);
1190 return wps_process_wsc_nack(wps
, msg
);
1192 wpa_printf(MSG_DEBUG
, "WPS: Unsupported op_code %d", op_code
);