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.
18 #include "crypto/crypto.h"
19 #include "crypto/sha256.h"
21 #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
)
123 if (os_get_random(wps
->nonce_e
, WPS_NONCE_LEN
) < 0)
125 wpa_hexdump(MSG_DEBUG
, "WPS: Enrollee Nonce",
126 wps
->nonce_e
, WPS_NONCE_LEN
);
128 wpa_printf(MSG_DEBUG
, "WPS: Building Message M1");
129 msg
= wpabuf_alloc(1000);
133 if (wps_build_version(msg
) ||
134 wps_build_msg_type(msg
, WPS_M1
) ||
135 wps_build_uuid_e(msg
, wps
->uuid_e
) ||
136 wps_build_mac_addr(wps
, msg
) ||
137 wps_build_enrollee_nonce(wps
, msg
) ||
138 wps_build_public_key(wps
, msg
) ||
139 wps_build_auth_type_flags(wps
, msg
) ||
140 wps_build_encr_type_flags(wps
, msg
) ||
141 wps_build_conn_type_flags(wps
, msg
) ||
142 wps_build_config_methods(msg
, wps
->wps
->config_methods
) ||
143 wps_build_wps_state(wps
, msg
) ||
144 wps_build_device_attrs(&wps
->wps
->dev
, msg
) ||
145 wps_build_rf_bands(&wps
->wps
->dev
, msg
) ||
146 wps_build_assoc_state(wps
, msg
) ||
147 wps_build_dev_password_id(msg
, wps
->dev_pw_id
) ||
148 wps_build_config_error(msg
, WPS_CFG_NO_ERROR
) ||
149 wps_build_os_version(&wps
->wps
->dev
, msg
) ||
150 wps_build_version2(msg
)) {
155 wps
->state
= RECV_M2
;
160 static struct wpabuf
* wps_build_m3(struct wps_data
*wps
)
164 wpa_printf(MSG_DEBUG
, "WPS: Building Message M3");
166 if (wps
->dev_password
== NULL
) {
167 wpa_printf(MSG_DEBUG
, "WPS: No Device Password available");
170 wps_derive_psk(wps
, wps
->dev_password
, wps
->dev_password_len
);
172 msg
= wpabuf_alloc(1000);
176 if (wps_build_version(msg
) ||
177 wps_build_msg_type(msg
, WPS_M3
) ||
178 wps_build_registrar_nonce(wps
, msg
) ||
179 wps_build_e_hash(wps
, msg
) ||
180 wps_build_version2(msg
) ||
181 wps_build_authenticator(wps
, msg
)) {
186 wps
->state
= RECV_M4
;
191 static struct wpabuf
* wps_build_m5(struct wps_data
*wps
)
193 struct wpabuf
*msg
, *plain
;
195 wpa_printf(MSG_DEBUG
, "WPS: Building Message M5");
197 plain
= wpabuf_alloc(200);
201 msg
= wpabuf_alloc(1000);
207 if (wps_build_version(msg
) ||
208 wps_build_msg_type(msg
, WPS_M5
) ||
209 wps_build_registrar_nonce(wps
, msg
) ||
210 wps_build_e_snonce1(wps
, plain
) ||
211 wps_build_key_wrap_auth(wps
, plain
) ||
212 wps_build_encr_settings(wps
, msg
, plain
) ||
213 wps_build_version2(msg
) ||
214 wps_build_authenticator(wps
, msg
)) {
221 wps
->state
= RECV_M6
;
226 static int wps_build_cred_ssid(struct wps_data
*wps
, struct wpabuf
*msg
)
228 wpa_printf(MSG_DEBUG
, "WPS: * SSID");
229 wpabuf_put_be16(msg
, ATTR_SSID
);
230 wpabuf_put_be16(msg
, wps
->wps
->ssid_len
);
231 wpabuf_put_data(msg
, wps
->wps
->ssid
, wps
->wps
->ssid_len
);
236 static int wps_build_cred_auth_type(struct wps_data
*wps
, struct wpabuf
*msg
)
238 wpa_printf(MSG_DEBUG
, "WPS: * Authentication Type");
239 wpabuf_put_be16(msg
, ATTR_AUTH_TYPE
);
240 wpabuf_put_be16(msg
, 2);
241 wpabuf_put_be16(msg
, wps
->wps
->auth_types
);
246 static int wps_build_cred_encr_type(struct wps_data
*wps
, struct wpabuf
*msg
)
248 wpa_printf(MSG_DEBUG
, "WPS: * Encryption Type");
249 wpabuf_put_be16(msg
, ATTR_ENCR_TYPE
);
250 wpabuf_put_be16(msg
, 2);
251 wpabuf_put_be16(msg
, wps
->wps
->encr_types
);
256 static int wps_build_cred_network_key(struct wps_data
*wps
, struct wpabuf
*msg
)
258 wpa_printf(MSG_DEBUG
, "WPS: * Network Key");
259 wpabuf_put_be16(msg
, ATTR_NETWORK_KEY
);
260 wpabuf_put_be16(msg
, wps
->wps
->network_key_len
);
261 wpabuf_put_data(msg
, wps
->wps
->network_key
, wps
->wps
->network_key_len
);
266 static int wps_build_cred_mac_addr(struct wps_data
*wps
, struct wpabuf
*msg
)
268 wpa_printf(MSG_DEBUG
, "WPS: * MAC Address (AP BSSID)");
269 wpabuf_put_be16(msg
, ATTR_MAC_ADDR
);
270 wpabuf_put_be16(msg
, ETH_ALEN
);
271 wpabuf_put_data(msg
, wps
->wps
->dev
.mac_addr
, ETH_ALEN
);
276 static int wps_build_ap_settings(struct wps_data
*wps
, struct wpabuf
*plain
)
278 if (wps
->wps
->ap_settings
) {
279 wpa_printf(MSG_DEBUG
, "WPS: * AP Settings (pre-configured)");
280 wpabuf_put_data(plain
, wps
->wps
->ap_settings
,
281 wps
->wps
->ap_settings_len
);
285 return wps_build_cred_ssid(wps
, plain
) ||
286 wps_build_cred_mac_addr(wps
, plain
) ||
287 wps_build_cred_auth_type(wps
, plain
) ||
288 wps_build_cred_encr_type(wps
, plain
) ||
289 wps_build_cred_network_key(wps
, plain
);
293 static struct wpabuf
* wps_build_m7(struct wps_data
*wps
)
295 struct wpabuf
*msg
, *plain
;
297 wpa_printf(MSG_DEBUG
, "WPS: Building Message M7");
299 plain
= wpabuf_alloc(500 + wps
->wps
->ap_settings_len
);
303 msg
= wpabuf_alloc(1000 + wps
->wps
->ap_settings_len
);
309 if (wps_build_version(msg
) ||
310 wps_build_msg_type(msg
, WPS_M7
) ||
311 wps_build_registrar_nonce(wps
, msg
) ||
312 wps_build_e_snonce2(wps
, plain
) ||
313 (wps
->wps
->ap
&& wps_build_ap_settings(wps
, plain
)) ||
314 wps_build_key_wrap_auth(wps
, plain
) ||
315 wps_build_encr_settings(wps
, msg
, plain
) ||
316 wps_build_version2(msg
) ||
317 wps_build_authenticator(wps
, msg
)) {
324 if (wps
->wps
->ap
&& wps
->wps
->registrar
) {
326 * If the Registrar is only learning our current configuration,
327 * it may not continue protocol run to successful completion.
328 * Store information here to make sure it remains available.
330 wps_device_store(wps
->wps
->registrar
, &wps
->peer_dev
,
334 wps
->state
= RECV_M8
;
339 static struct wpabuf
* wps_build_wsc_done(struct wps_data
*wps
)
343 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_Done");
345 msg
= wpabuf_alloc(1000);
349 if (wps_build_version(msg
) ||
350 wps_build_msg_type(msg
, WPS_WSC_DONE
) ||
351 wps_build_enrollee_nonce(wps
, msg
) ||
352 wps_build_registrar_nonce(wps
, msg
) ||
353 wps_build_version2(msg
)) {
359 wps
->state
= RECV_ACK
;
361 wps_success_event(wps
->wps
);
362 wps
->state
= WPS_FINISHED
;
368 static struct wpabuf
* wps_build_wsc_ack(struct wps_data
*wps
)
372 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_ACK");
374 msg
= wpabuf_alloc(1000);
378 if (wps_build_version(msg
) ||
379 wps_build_msg_type(msg
, WPS_WSC_ACK
) ||
380 wps_build_enrollee_nonce(wps
, msg
) ||
381 wps_build_registrar_nonce(wps
, msg
) ||
382 wps_build_version2(msg
)) {
391 static struct wpabuf
* wps_build_wsc_nack(struct wps_data
*wps
)
395 wpa_printf(MSG_DEBUG
, "WPS: Building Message WSC_NACK");
397 msg
= wpabuf_alloc(1000);
401 if (wps_build_version(msg
) ||
402 wps_build_msg_type(msg
, WPS_WSC_NACK
) ||
403 wps_build_enrollee_nonce(wps
, msg
) ||
404 wps_build_registrar_nonce(wps
, msg
) ||
405 wps_build_config_error(msg
, wps
->config_error
) ||
406 wps_build_version2(msg
)) {
415 struct wpabuf
* wps_enrollee_get_msg(struct wps_data
*wps
,
416 enum wsc_op_code
*op_code
)
420 switch (wps
->state
) {
422 msg
= wps_build_m1(wps
);
426 msg
= wps_build_m3(wps
);
430 msg
= wps_build_m5(wps
);
434 msg
= wps_build_m7(wps
);
439 msg
= wps_build_wsc_nack(wps
);
443 msg
= wps_build_wsc_ack(wps
);
446 /* Another M2/M2D may be received */
447 wps
->state
= RECV_M2
;
451 msg
= wps_build_wsc_nack(wps
);
455 msg
= wps_build_wsc_done(wps
);
459 wpa_printf(MSG_DEBUG
, "WPS: Unsupported state %d for building "
460 "a message", wps
->state
);
465 if (*op_code
== WSC_MSG
&& msg
) {
466 /* Save a copy of the last message for Authenticator derivation
468 wpabuf_free(wps
->last_msg
);
469 wps
->last_msg
= wpabuf_dup(msg
);
476 static int wps_process_registrar_nonce(struct wps_data
*wps
, const u8
*r_nonce
)
478 if (r_nonce
== NULL
) {
479 wpa_printf(MSG_DEBUG
, "WPS: No Registrar Nonce received");
483 os_memcpy(wps
->nonce_r
, r_nonce
, WPS_NONCE_LEN
);
484 wpa_hexdump(MSG_DEBUG
, "WPS: Registrar Nonce",
485 wps
->nonce_r
, WPS_NONCE_LEN
);
491 static int wps_process_enrollee_nonce(struct wps_data
*wps
, const u8
*e_nonce
)
493 if (e_nonce
== NULL
) {
494 wpa_printf(MSG_DEBUG
, "WPS: No Enrollee Nonce received");
498 if (os_memcmp(wps
->nonce_e
, e_nonce
, WPS_NONCE_LEN
) != 0) {
499 wpa_printf(MSG_DEBUG
, "WPS: Invalid Enrollee Nonce received");
507 static int wps_process_uuid_r(struct wps_data
*wps
, const u8
*uuid_r
)
509 if (uuid_r
== NULL
) {
510 wpa_printf(MSG_DEBUG
, "WPS: No UUID-R received");
514 os_memcpy(wps
->uuid_r
, uuid_r
, WPS_UUID_LEN
);
515 wpa_hexdump(MSG_DEBUG
, "WPS: UUID-R", wps
->uuid_r
, WPS_UUID_LEN
);
521 static int wps_process_pubkey(struct wps_data
*wps
, const u8
*pk
,
524 if (pk
== NULL
|| pk_len
== 0) {
525 wpa_printf(MSG_DEBUG
, "WPS: No Public Key received");
529 #ifdef CONFIG_WPS_OOB
530 if (wps
->dev_pw_id
!= DEV_PW_DEFAULT
&&
531 wps
->wps
->oob_conf
.pubkey_hash
) {
533 u8 hash
[WPS_HASH_LEN
];
536 sha256_vector(1, addr
, &pk_len
, hash
);
538 wpabuf_head(wps
->wps
->oob_conf
.pubkey_hash
),
539 WPS_OOB_PUBKEY_HASH_LEN
) != 0) {
540 wpa_printf(MSG_ERROR
, "WPS: Public Key hash error");
544 #endif /* CONFIG_WPS_OOB */
546 wpabuf_free(wps
->dh_pubkey_r
);
547 wps
->dh_pubkey_r
= wpabuf_alloc_copy(pk
, pk_len
);
548 if (wps
->dh_pubkey_r
== NULL
)
551 if (wps_derive_keys(wps
) < 0)
558 static int wps_process_r_hash1(struct wps_data
*wps
, const u8
*r_hash1
)
560 if (r_hash1
== NULL
) {
561 wpa_printf(MSG_DEBUG
, "WPS: No R-Hash1 received");
565 os_memcpy(wps
->peer_hash1
, r_hash1
, WPS_HASH_LEN
);
566 wpa_hexdump(MSG_DEBUG
, "WPS: R-Hash1", wps
->peer_hash1
, WPS_HASH_LEN
);
572 static int wps_process_r_hash2(struct wps_data
*wps
, const u8
*r_hash2
)
574 if (r_hash2
== NULL
) {
575 wpa_printf(MSG_DEBUG
, "WPS: No R-Hash2 received");
579 os_memcpy(wps
->peer_hash2
, r_hash2
, WPS_HASH_LEN
);
580 wpa_hexdump(MSG_DEBUG
, "WPS: R-Hash2", wps
->peer_hash2
, WPS_HASH_LEN
);
586 static int wps_process_r_snonce1(struct wps_data
*wps
, const u8
*r_snonce1
)
588 u8 hash
[SHA256_MAC_LEN
];
592 if (r_snonce1
== NULL
) {
593 wpa_printf(MSG_DEBUG
, "WPS: No R-SNonce1 received");
597 wpa_hexdump_key(MSG_DEBUG
, "WPS: R-SNonce1", r_snonce1
,
598 WPS_SECRET_NONCE_LEN
);
600 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
602 len
[0] = WPS_SECRET_NONCE_LEN
;
604 len
[1] = WPS_PSK_LEN
;
605 addr
[2] = wpabuf_head(wps
->dh_pubkey_e
);
606 len
[2] = wpabuf_len(wps
->dh_pubkey_e
);
607 addr
[3] = wpabuf_head(wps
->dh_pubkey_r
);
608 len
[3] = wpabuf_len(wps
->dh_pubkey_r
);
609 hmac_sha256_vector(wps
->authkey
, WPS_AUTHKEY_LEN
, 4, addr
, len
, hash
);
611 if (os_memcmp(wps
->peer_hash1
, hash
, WPS_HASH_LEN
) != 0) {
612 wpa_printf(MSG_DEBUG
, "WPS: R-Hash1 derived from R-S1 does "
613 "not match with the pre-committed value");
614 wps
->config_error
= WPS_CFG_DEV_PASSWORD_AUTH_FAILURE
;
615 wps_pwd_auth_fail_event(wps
->wps
, 1, 1);
619 wpa_printf(MSG_DEBUG
, "WPS: Registrar proved knowledge of the first "
620 "half of the device password");
626 static int wps_process_r_snonce2(struct wps_data
*wps
, const u8
*r_snonce2
)
628 u8 hash
[SHA256_MAC_LEN
];
632 if (r_snonce2
== NULL
) {
633 wpa_printf(MSG_DEBUG
, "WPS: No R-SNonce2 received");
637 wpa_hexdump_key(MSG_DEBUG
, "WPS: R-SNonce2", r_snonce2
,
638 WPS_SECRET_NONCE_LEN
);
640 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
642 len
[0] = WPS_SECRET_NONCE_LEN
;
644 len
[1] = WPS_PSK_LEN
;
645 addr
[2] = wpabuf_head(wps
->dh_pubkey_e
);
646 len
[2] = wpabuf_len(wps
->dh_pubkey_e
);
647 addr
[3] = wpabuf_head(wps
->dh_pubkey_r
);
648 len
[3] = wpabuf_len(wps
->dh_pubkey_r
);
649 hmac_sha256_vector(wps
->authkey
, WPS_AUTHKEY_LEN
, 4, addr
, len
, hash
);
651 if (os_memcmp(wps
->peer_hash2
, hash
, WPS_HASH_LEN
) != 0) {
652 wpa_printf(MSG_DEBUG
, "WPS: R-Hash2 derived from R-S2 does "
653 "not match with the pre-committed value");
654 wps
->config_error
= WPS_CFG_DEV_PASSWORD_AUTH_FAILURE
;
655 wps_pwd_auth_fail_event(wps
->wps
, 1, 2);
659 wpa_printf(MSG_DEBUG
, "WPS: Registrar proved knowledge of the second "
660 "half of the device password");
666 static int wps_process_cred_e(struct wps_data
*wps
, const u8
*cred
,
667 size_t cred_len
, int wps2
)
669 struct wps_parse_attr attr
;
672 wpa_printf(MSG_DEBUG
, "WPS: Received Credential");
673 os_memset(&wps
->cred
, 0, sizeof(wps
->cred
));
674 wpabuf_set(&msg
, cred
, cred_len
);
675 if (wps_parse_msg(&msg
, &attr
) < 0 ||
676 wps_process_cred(&attr
, &wps
->cred
))
679 if (os_memcmp(wps
->cred
.mac_addr
, wps
->wps
->dev
.mac_addr
, ETH_ALEN
) !=
681 wpa_printf(MSG_DEBUG
, "WPS: MAC Address in the Credential ("
682 MACSTR
") does not match with own address (" MACSTR
683 ")", MAC2STR(wps
->cred
.mac_addr
),
684 MAC2STR(wps
->wps
->dev
.mac_addr
));
686 * In theory, this could be consider fatal error, but there are
687 * number of deployed implementations using other address here
688 * due to unclarity in the specification. For interoperability
689 * reasons, allow this to be processed since we do not really
690 * use the MAC Address information for anything.
692 #ifdef CONFIG_WPS_STRICT
694 wpa_printf(MSG_INFO
, "WPS: Do not accept incorrect "
695 "MAC Address in AP Settings");
698 #endif /* CONFIG_WPS_STRICT */
701 if (wps
->wps
->cred_cb
) {
702 wps
->cred
.cred_attr
= cred
- 4;
703 wps
->cred
.cred_attr_len
= cred_len
+ 4;
704 wps
->wps
->cred_cb(wps
->wps
->cb_ctx
, &wps
->cred
);
705 wps
->cred
.cred_attr
= NULL
;
706 wps
->cred
.cred_attr_len
= 0;
713 static int wps_process_creds(struct wps_data
*wps
, const u8
*cred
[],
714 size_t cred_len
[], size_t num_cred
, int wps2
)
722 wpa_printf(MSG_DEBUG
, "WPS: No Credential attributes "
727 for (i
= 0; i
< num_cred
; i
++) {
728 if (wps_process_cred_e(wps
, cred
[i
], cred_len
[i
], wps2
))
736 static int wps_process_ap_settings_e(struct wps_data
*wps
,
737 struct wps_parse_attr
*attr
,
738 struct wpabuf
*attrs
, int wps2
)
740 struct wps_credential cred
;
745 if (wps_process_ap_settings(attr
, &cred
) < 0)
748 wpa_printf(MSG_INFO
, "WPS: Received new AP configuration from "
751 if (os_memcmp(cred
.mac_addr
, wps
->wps
->dev
.mac_addr
, ETH_ALEN
) !=
753 wpa_printf(MSG_DEBUG
, "WPS: MAC Address in the AP Settings ("
754 MACSTR
") does not match with own address (" MACSTR
755 ")", MAC2STR(cred
.mac_addr
),
756 MAC2STR(wps
->wps
->dev
.mac_addr
));
758 * In theory, this could be consider fatal error, but there are
759 * number of deployed implementations using other address here
760 * due to unclarity in the specification. For interoperability
761 * reasons, allow this to be processed since we do not really
762 * use the MAC Address information for anything.
764 #ifdef CONFIG_WPS_STRICT
766 wpa_printf(MSG_INFO
, "WPS: Do not accept incorrect "
767 "MAC Address in AP Settings");
770 #endif /* CONFIG_WPS_STRICT */
773 if (wps
->wps
->cred_cb
) {
774 cred
.cred_attr
= wpabuf_head(attrs
);
775 cred
.cred_attr_len
= wpabuf_len(attrs
);
776 wps
->wps
->cred_cb(wps
->wps
->cb_ctx
, &cred
);
783 static enum wps_process_res
wps_process_m2(struct wps_data
*wps
,
784 const struct wpabuf
*msg
,
785 struct wps_parse_attr
*attr
)
787 wpa_printf(MSG_DEBUG
, "WPS: Received M2");
789 if (wps
->state
!= RECV_M2
) {
790 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
791 "receiving M2", wps
->state
);
792 wps
->state
= SEND_WSC_NACK
;
796 if (wps_process_registrar_nonce(wps
, attr
->registrar_nonce
) ||
797 wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
798 wps_process_uuid_r(wps
, attr
->uuid_r
)) {
799 wps
->state
= SEND_WSC_NACK
;
804 (wps
->wps
->ap_setup_locked
|| wps
->dev_password
== NULL
)) {
805 wpa_printf(MSG_DEBUG
, "WPS: AP Setup is locked - refuse "
806 "registration of a new Registrar");
807 wps
->config_error
= WPS_CFG_SETUP_LOCKED
;
808 wps
->state
= SEND_WSC_NACK
;
812 if (wps_process_pubkey(wps
, attr
->public_key
, attr
->public_key_len
) ||
813 wps_process_authenticator(wps
, attr
->authenticator
, msg
) ||
814 wps_process_device_attrs(&wps
->peer_dev
, attr
)) {
815 wps
->state
= SEND_WSC_NACK
;
819 wps
->state
= SEND_M3
;
824 static enum wps_process_res
wps_process_m2d(struct wps_data
*wps
,
825 struct wps_parse_attr
*attr
)
827 wpa_printf(MSG_DEBUG
, "WPS: Received M2D");
829 if (wps
->state
!= RECV_M2
) {
830 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
831 "receiving M2D", wps
->state
);
832 wps
->state
= SEND_WSC_NACK
;
836 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Manufacturer",
837 attr
->manufacturer
, attr
->manufacturer_len
);
838 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Model Name",
839 attr
->model_name
, attr
->model_name_len
);
840 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Model Number",
841 attr
->model_number
, attr
->model_number_len
);
842 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Serial Number",
843 attr
->serial_number
, attr
->serial_number_len
);
844 wpa_hexdump_ascii(MSG_DEBUG
, "WPS: Device Name",
845 attr
->dev_name
, attr
->dev_name_len
);
847 if (wps
->wps
->event_cb
) {
848 union wps_event_data data
;
849 struct wps_event_m2d
*m2d
= &data
.m2d
;
850 os_memset(&data
, 0, sizeof(data
));
851 if (attr
->config_methods
)
852 m2d
->config_methods
=
853 WPA_GET_BE16(attr
->config_methods
);
854 m2d
->manufacturer
= attr
->manufacturer
;
855 m2d
->manufacturer_len
= attr
->manufacturer_len
;
856 m2d
->model_name
= attr
->model_name
;
857 m2d
->model_name_len
= attr
->model_name_len
;
858 m2d
->model_number
= attr
->model_number
;
859 m2d
->model_number_len
= attr
->model_number_len
;
860 m2d
->serial_number
= attr
->serial_number
;
861 m2d
->serial_number_len
= attr
->serial_number_len
;
862 m2d
->dev_name
= attr
->dev_name
;
863 m2d
->dev_name_len
= attr
->dev_name_len
;
864 m2d
->primary_dev_type
= attr
->primary_dev_type
;
865 if (attr
->config_error
)
867 WPA_GET_BE16(attr
->config_error
);
868 if (attr
->dev_password_id
)
869 m2d
->dev_password_id
=
870 WPA_GET_BE16(attr
->dev_password_id
);
871 wps
->wps
->event_cb(wps
->wps
->cb_ctx
, WPS_EV_M2D
, &data
);
874 wps
->state
= RECEIVED_M2D
;
879 static enum wps_process_res
wps_process_m4(struct wps_data
*wps
,
880 const struct wpabuf
*msg
,
881 struct wps_parse_attr
*attr
)
883 struct wpabuf
*decrypted
;
884 struct wps_parse_attr eattr
;
886 wpa_printf(MSG_DEBUG
, "WPS: Received M4");
888 if (wps
->state
!= RECV_M4
) {
889 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
890 "receiving M4", wps
->state
);
891 wps
->state
= SEND_WSC_NACK
;
895 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
896 wps_process_authenticator(wps
, attr
->authenticator
, msg
) ||
897 wps_process_r_hash1(wps
, attr
->r_hash1
) ||
898 wps_process_r_hash2(wps
, attr
->r_hash2
)) {
899 wps
->state
= SEND_WSC_NACK
;
903 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
904 attr
->encr_settings_len
);
905 if (decrypted
== NULL
) {
906 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
907 "Settings attribute");
908 wps
->state
= SEND_WSC_NACK
;
912 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
914 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
915 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
916 wps_process_r_snonce1(wps
, eattr
.r_snonce1
)) {
917 wpabuf_free(decrypted
);
918 wps
->state
= SEND_WSC_NACK
;
921 wpabuf_free(decrypted
);
923 wps
->state
= SEND_M5
;
928 static enum wps_process_res
wps_process_m6(struct wps_data
*wps
,
929 const struct wpabuf
*msg
,
930 struct wps_parse_attr
*attr
)
932 struct wpabuf
*decrypted
;
933 struct wps_parse_attr eattr
;
935 wpa_printf(MSG_DEBUG
, "WPS: Received M6");
937 if (wps
->state
!= RECV_M6
) {
938 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
939 "receiving M6", wps
->state
);
940 wps
->state
= SEND_WSC_NACK
;
944 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
945 wps_process_authenticator(wps
, attr
->authenticator
, msg
)) {
946 wps
->state
= SEND_WSC_NACK
;
950 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
951 attr
->encr_settings_len
);
952 if (decrypted
== NULL
) {
953 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
954 "Settings attribute");
955 wps
->state
= SEND_WSC_NACK
;
959 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
961 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
962 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
963 wps_process_r_snonce2(wps
, eattr
.r_snonce2
)) {
964 wpabuf_free(decrypted
);
965 wps
->state
= SEND_WSC_NACK
;
968 wpabuf_free(decrypted
);
970 wps
->state
= SEND_M7
;
975 static enum wps_process_res
wps_process_m8(struct wps_data
*wps
,
976 const struct wpabuf
*msg
,
977 struct wps_parse_attr
*attr
)
979 struct wpabuf
*decrypted
;
980 struct wps_parse_attr eattr
;
982 wpa_printf(MSG_DEBUG
, "WPS: Received M8");
984 if (wps
->state
!= RECV_M8
) {
985 wpa_printf(MSG_DEBUG
, "WPS: Unexpected state (%d) for "
986 "receiving M8", wps
->state
);
987 wps
->state
= SEND_WSC_NACK
;
991 if (wps_process_enrollee_nonce(wps
, attr
->enrollee_nonce
) ||
992 wps_process_authenticator(wps
, attr
->authenticator
, msg
)) {
993 wps
->state
= SEND_WSC_NACK
;
997 decrypted
= wps_decrypt_encr_settings(wps
, attr
->encr_settings
,
998 attr
->encr_settings_len
);
999 if (decrypted
== NULL
) {
1000 wpa_printf(MSG_DEBUG
, "WPS: Failed to decrypted Encrypted "
1001 "Settings attribute");
1002 wps
->state
= SEND_WSC_NACK
;
1003 return WPS_CONTINUE
;
1006 wpa_printf(MSG_DEBUG
, "WPS: Processing decrypted Encrypted Settings "
1008 if (wps_parse_msg(decrypted
, &eattr
) < 0 ||
1009 wps_process_key_wrap_auth(wps
, decrypted
, eattr
.key_wrap_auth
) ||
1010 wps_process_creds(wps
, eattr
.cred
, eattr
.cred_len
,
1011 eattr
.num_cred
, attr
->version2
!= NULL
) ||
1012 wps_process_ap_settings_e(wps
, &eattr
, decrypted
,
1013 attr
->version2
!= NULL
)) {
1014 wpabuf_free(decrypted
);
1015 wps
->state
= SEND_WSC_NACK
;
1016 return WPS_CONTINUE
;
1018 wpabuf_free(decrypted
);
1020 wps
->state
= WPS_MSG_DONE
;
1021 return WPS_CONTINUE
;
1025 static enum wps_process_res
wps_process_wsc_msg(struct wps_data
*wps
,
1026 const struct wpabuf
*msg
)
1028 struct wps_parse_attr attr
;
1029 enum wps_process_res ret
= WPS_CONTINUE
;
1031 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_MSG");
1033 if (wps_parse_msg(msg
, &attr
) < 0)
1036 if (attr
.enrollee_nonce
== NULL
||
1037 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
1038 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
1042 if (attr
.msg_type
== NULL
) {
1043 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
1047 switch (*attr
.msg_type
) {
1049 ret
= wps_process_m2(wps
, msg
, &attr
);
1052 ret
= wps_process_m2d(wps
, &attr
);
1055 ret
= wps_process_m4(wps
, msg
, &attr
);
1056 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1057 wps_fail_event(wps
->wps
, WPS_M4
);
1060 ret
= wps_process_m6(wps
, msg
, &attr
);
1061 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1062 wps_fail_event(wps
->wps
, WPS_M6
);
1065 ret
= wps_process_m8(wps
, msg
, &attr
);
1066 if (ret
== WPS_FAILURE
|| wps
->state
== SEND_WSC_NACK
)
1067 wps_fail_event(wps
->wps
, WPS_M8
);
1070 wpa_printf(MSG_DEBUG
, "WPS: Unsupported Message Type %d",
1076 * Save a copy of the last message for Authenticator derivation if we
1077 * are continuing. However, skip M2D since it is not authenticated and
1078 * neither is the ACK/NACK response frame. This allows the possibly
1079 * following M2 to be processed correctly by using the previously sent
1080 * M1 in Authenticator derivation.
1082 if (ret
== WPS_CONTINUE
&& *attr
.msg_type
!= WPS_M2D
) {
1083 /* Save a copy of the last message for Authenticator derivation
1085 wpabuf_free(wps
->last_msg
);
1086 wps
->last_msg
= wpabuf_dup(msg
);
1093 static enum wps_process_res
wps_process_wsc_ack(struct wps_data
*wps
,
1094 const struct wpabuf
*msg
)
1096 struct wps_parse_attr attr
;
1098 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_ACK");
1100 if (wps_parse_msg(msg
, &attr
) < 0)
1103 if (attr
.msg_type
== NULL
) {
1104 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
1108 if (*attr
.msg_type
!= WPS_WSC_ACK
) {
1109 wpa_printf(MSG_DEBUG
, "WPS: Invalid Message Type %d",
1114 if (attr
.registrar_nonce
== NULL
||
1115 os_memcmp(wps
->nonce_r
, attr
.registrar_nonce
, WPS_NONCE_LEN
!= 0))
1117 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in registrar nonce");
1121 if (attr
.enrollee_nonce
== NULL
||
1122 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
1123 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
1127 if (wps
->state
== RECV_ACK
&& wps
->wps
->ap
) {
1128 wpa_printf(MSG_DEBUG
, "WPS: External Registrar registration "
1129 "completed successfully");
1130 wps_success_event(wps
->wps
);
1131 wps
->state
= WPS_FINISHED
;
1139 static enum wps_process_res
wps_process_wsc_nack(struct wps_data
*wps
,
1140 const struct wpabuf
*msg
)
1142 struct wps_parse_attr attr
;
1144 wpa_printf(MSG_DEBUG
, "WPS: Received WSC_NACK");
1146 if (wps_parse_msg(msg
, &attr
) < 0)
1149 if (attr
.msg_type
== NULL
) {
1150 wpa_printf(MSG_DEBUG
, "WPS: No Message Type attribute");
1154 if (*attr
.msg_type
!= WPS_WSC_NACK
) {
1155 wpa_printf(MSG_DEBUG
, "WPS: Invalid Message Type %d",
1160 if (attr
.registrar_nonce
== NULL
||
1161 os_memcmp(wps
->nonce_r
, attr
.registrar_nonce
, WPS_NONCE_LEN
!= 0))
1163 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in registrar nonce");
1164 wpa_hexdump(MSG_DEBUG
, "WPS: Received Registrar Nonce",
1165 attr
.registrar_nonce
, WPS_NONCE_LEN
);
1166 wpa_hexdump(MSG_DEBUG
, "WPS: Expected Registrar Nonce",
1167 wps
->nonce_r
, WPS_NONCE_LEN
);
1171 if (attr
.enrollee_nonce
== NULL
||
1172 os_memcmp(wps
->nonce_e
, attr
.enrollee_nonce
, WPS_NONCE_LEN
!= 0)) {
1173 wpa_printf(MSG_DEBUG
, "WPS: Mismatch in enrollee nonce");
1174 wpa_hexdump(MSG_DEBUG
, "WPS: Received Enrollee Nonce",
1175 attr
.enrollee_nonce
, WPS_NONCE_LEN
);
1176 wpa_hexdump(MSG_DEBUG
, "WPS: Expected Enrollee Nonce",
1177 wps
->nonce_e
, WPS_NONCE_LEN
);
1181 if (attr
.config_error
== NULL
) {
1182 wpa_printf(MSG_DEBUG
, "WPS: No Configuration Error attribute "
1187 wpa_printf(MSG_DEBUG
, "WPS: Registrar terminated negotiation with "
1188 "Configuration Error %d", WPA_GET_BE16(attr
.config_error
));
1190 switch (wps
->state
) {
1192 wps_fail_event(wps
->wps
, WPS_M3
);
1195 wps_fail_event(wps
->wps
, WPS_M5
);
1198 wps_fail_event(wps
->wps
, WPS_M7
);
1204 /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
1205 * Enrollee is Authenticator */
1206 wps
->state
= SEND_WSC_NACK
;
1212 enum wps_process_res
wps_enrollee_process_msg(struct wps_data
*wps
,
1213 enum wsc_op_code op_code
,
1214 const struct wpabuf
*msg
)
1217 wpa_printf(MSG_DEBUG
, "WPS: Processing received message (len=%lu "
1219 (unsigned long) wpabuf_len(msg
), op_code
);
1221 if (op_code
== WSC_UPnP
) {
1222 /* Determine the OpCode based on message type attribute */
1223 struct wps_parse_attr attr
;
1224 if (wps_parse_msg(msg
, &attr
) == 0 && attr
.msg_type
) {
1225 if (*attr
.msg_type
== WPS_WSC_ACK
)
1227 else if (*attr
.msg_type
== WPS_WSC_NACK
)
1235 return wps_process_wsc_msg(wps
, msg
);
1237 return wps_process_wsc_ack(wps
, msg
);
1239 return wps_process_wsc_nack(wps
, msg
);
1241 wpa_printf(MSG_DEBUG
, "WPS: Unsupported op_code %d", op_code
);