--- /dev/null
+/*
+ * Wi-Fi Protected Setup - Enrollee
+ * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "crypto/crypto.h"
+#include "crypto/sha256.h"
+#include "wps_i.h"
+#include "wps_dev_attr.h"
+
+
+static int wps_build_mac_addr(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * MAC Address");
+ wpabuf_put_be16(msg, ATTR_MAC_ADDR);
+ wpabuf_put_be16(msg, ETH_ALEN);
+ wpabuf_put_data(msg, wps->mac_addr_e, ETH_ALEN);
+ return 0;
+}
+
+
+static int wps_build_wps_state(struct wps_data *wps, struct wpabuf *msg)
+{
+ u8 state;
+ if (wps->wps->ap)
+ state = wps->wps->wps_state;
+ else
+ state = WPS_STATE_NOT_CONFIGURED;
+ wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
+ state);
+ wpabuf_put_be16(msg, ATTR_WPS_STATE);
+ wpabuf_put_be16(msg, 1);
+ wpabuf_put_u8(msg, state);
+ return 0;
+}
+
+
+static int wps_build_e_hash(struct wps_data *wps, struct wpabuf *msg)
+{
+ u8 *hash;
+ const u8 *addr[4];
+ size_t len[4];
+
+ if (os_get_random(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
+ return -1;
+ wpa_hexdump(MSG_DEBUG, "WPS: E-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: E-S2",
+ wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
+
+ if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
+ "E-Hash derivation");
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: * E-Hash1");
+ wpabuf_put_be16(msg, ATTR_E_HASH1);
+ wpabuf_put_be16(msg, SHA256_MAC_LEN);
+ hash = wpabuf_put(msg, SHA256_MAC_LEN);
+ /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
+ addr[0] = wps->snonce;
+ len[0] = WPS_SECRET_NONCE_LEN;
+ addr[1] = wps->psk1;
+ len[1] = WPS_PSK_LEN;
+ addr[2] = wpabuf_head(wps->dh_pubkey_e);
+ len[2] = wpabuf_len(wps->dh_pubkey_e);
+ addr[3] = wpabuf_head(wps->dh_pubkey_r);
+ len[3] = wpabuf_len(wps->dh_pubkey_r);
+ hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
+ wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", hash, SHA256_MAC_LEN);
+
+ wpa_printf(MSG_DEBUG, "WPS: * E-Hash2");
+ wpabuf_put_be16(msg, ATTR_E_HASH2);
+ wpabuf_put_be16(msg, SHA256_MAC_LEN);
+ hash = wpabuf_put(msg, SHA256_MAC_LEN);
+ /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
+ addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
+ addr[1] = wps->psk2;
+ hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
+ wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", hash, SHA256_MAC_LEN);
+
+ return 0;
+}
+
+
+static int wps_build_e_snonce1(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * E-SNonce1");
+ wpabuf_put_be16(msg, ATTR_E_SNONCE1);
+ wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
+ wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
+ return 0;
+}
+
+
+static int wps_build_e_snonce2(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * E-SNonce2");
+ wpabuf_put_be16(msg, ATTR_E_SNONCE2);
+ wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
+ wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
+ WPS_SECRET_NONCE_LEN);
+ return 0;
+}
+
+
+static struct wpabuf * wps_build_m1(struct wps_data *wps)
+{
+ struct wpabuf *msg;
+
+ if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
+ return NULL;
+ wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
+ wps->nonce_e, WPS_NONCE_LEN);
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL)
+ return NULL;
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_M1) ||
+ wps_build_uuid_e(msg, wps->uuid_e) ||
+ wps_build_mac_addr(wps, msg) ||
+ wps_build_enrollee_nonce(wps, msg) ||
+ wps_build_public_key(wps, msg) ||
+ wps_build_auth_type_flags(wps, msg) ||
+ wps_build_encr_type_flags(wps, msg) ||
+ wps_build_conn_type_flags(wps, msg) ||
+ wps_build_config_methods(msg, wps->wps->config_methods) ||
+ wps_build_wps_state(wps, msg) ||
+ wps_build_device_attrs(&wps->wps->dev, msg) ||
+ wps_build_rf_bands(&wps->wps->dev, msg) ||
+ wps_build_assoc_state(wps, msg) ||
+ wps_build_dev_password_id(msg, wps->dev_pw_id) ||
+ wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
+ wps_build_os_version(&wps->wps->dev, msg) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0)) {
+ wpabuf_free(msg);
+ return NULL;
+ }
+
+ wps->state = RECV_M2;
+ return msg;
+}
+
+
+static struct wpabuf * wps_build_m3(struct wps_data *wps)
+{
+ struct wpabuf *msg;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
+
+ if (wps->dev_password == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
+ return NULL;
+ }
+ wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
+
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL)
+ return NULL;
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_M3) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_e_hash(wps, msg) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0) ||
+ wps_build_authenticator(wps, msg)) {
+ wpabuf_free(msg);
+ return NULL;
+ }
+
+ wps->state = RECV_M4;
+ return msg;
+}
+
+
+static struct wpabuf * wps_build_m5(struct wps_data *wps)
+{
+ struct wpabuf *msg, *plain;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message M5");
+
+ plain = wpabuf_alloc(200);
+ if (plain == NULL)
+ return NULL;
+
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL) {
+ wpabuf_free(plain);
+ return NULL;
+ }
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_M5) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_e_snonce1(wps, plain) ||
+ wps_build_key_wrap_auth(wps, plain) ||
+ wps_build_encr_settings(wps, msg, plain) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0) ||
+ wps_build_authenticator(wps, msg)) {
+ wpabuf_free(plain);
+ wpabuf_free(msg);
+ return NULL;
+ }
+ wpabuf_free(plain);
+
+ wps->state = RECV_M6;
+ return msg;
+}
+
+
+static int wps_build_cred_ssid(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * SSID");
+ wpabuf_put_be16(msg, ATTR_SSID);
+ wpabuf_put_be16(msg, wps->wps->ssid_len);
+ wpabuf_put_data(msg, wps->wps->ssid, wps->wps->ssid_len);
+ return 0;
+}
+
+
+static int wps_build_cred_auth_type(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * Authentication Type");
+ wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
+ wpabuf_put_be16(msg, 2);
+ wpabuf_put_be16(msg, wps->wps->auth_types);
+ return 0;
+}
+
+
+static int wps_build_cred_encr_type(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * Encryption Type");
+ wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
+ wpabuf_put_be16(msg, 2);
+ wpabuf_put_be16(msg, wps->wps->encr_types);
+ return 0;
+}
+
+
+static int wps_build_cred_network_key(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * Network Key");
+ wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
+ wpabuf_put_be16(msg, wps->wps->network_key_len);
+ wpabuf_put_data(msg, wps->wps->network_key, wps->wps->network_key_len);
+ return 0;
+}
+
+
+static int wps_build_cred_mac_addr(struct wps_data *wps, struct wpabuf *msg)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * MAC Address (AP BSSID)");
+ wpabuf_put_be16(msg, ATTR_MAC_ADDR);
+ wpabuf_put_be16(msg, ETH_ALEN);
+ wpabuf_put_data(msg, wps->wps->dev.mac_addr, ETH_ALEN);
+ return 0;
+}
+
+
+static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *plain)
+{
+ if (wps->wps->ap_settings) {
+ wpa_printf(MSG_DEBUG, "WPS: * AP Settings (pre-configured)");
+ wpabuf_put_data(plain, wps->wps->ap_settings,
+ wps->wps->ap_settings_len);
+ return 0;
+ }
+
+ return wps_build_cred_ssid(wps, plain) ||
+ wps_build_cred_mac_addr(wps, plain) ||
+ wps_build_cred_auth_type(wps, plain) ||
+ wps_build_cred_encr_type(wps, plain) ||
+ wps_build_cred_network_key(wps, plain);
+}
+
+
+static struct wpabuf * wps_build_m7(struct wps_data *wps)
+{
+ struct wpabuf *msg, *plain;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
+
+ plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
+ if (plain == NULL)
+ return NULL;
+
+ msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
+ if (msg == NULL) {
+ wpabuf_free(plain);
+ return NULL;
+ }
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_M7) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_e_snonce2(wps, plain) ||
+ (wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
+ wps_build_key_wrap_auth(wps, plain) ||
+ wps_build_encr_settings(wps, msg, plain) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0) ||
+ wps_build_authenticator(wps, msg)) {
+ wpabuf_free(plain);
+ wpabuf_free(msg);
+ return NULL;
+ }
+ wpabuf_free(plain);
+
+ if (wps->wps->ap && wps->wps->registrar) {
+ /*
+ * If the Registrar is only learning our current configuration,
+ * it may not continue protocol run to successful completion.
+ * Store information here to make sure it remains available.
+ */
+ wps_device_store(wps->wps->registrar, &wps->peer_dev,
+ wps->uuid_r);
+ }
+
+ wps->state = RECV_M8;
+ return msg;
+}
+
+
+static struct wpabuf * wps_build_wsc_done(struct wps_data *wps)
+{
+ struct wpabuf *msg;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_Done");
+
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL)
+ return NULL;
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_WSC_DONE) ||
+ wps_build_enrollee_nonce(wps, msg) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0)) {
+ wpabuf_free(msg);
+ return NULL;
+ }
+
+ if (wps->wps->ap)
+ wps->state = RECV_ACK;
+ else {
+ wps_success_event(wps->wps);
+ wps->state = WPS_FINISHED;
+ }
+ return msg;
+}
+
+
+static struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
+{
+ struct wpabuf *msg;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
+
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL)
+ return NULL;
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_WSC_ACK) ||
+ wps_build_enrollee_nonce(wps, msg) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0)) {
+ wpabuf_free(msg);
+ return NULL;
+ }
+
+ return msg;
+}
+
+
+static struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
+{
+ struct wpabuf *msg;
+
+ wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
+
+ msg = wpabuf_alloc(1000);
+ if (msg == NULL)
+ return NULL;
+
+ if (wps_build_version(msg) ||
+ wps_build_msg_type(msg, WPS_WSC_NACK) ||
+ wps_build_enrollee_nonce(wps, msg) ||
+ wps_build_registrar_nonce(wps, msg) ||
+ wps_build_config_error(msg, wps->config_error) ||
+ wps_build_wfa_ext(msg, 0, NULL, 0)) {
+ wpabuf_free(msg);
+ return NULL;
+ }
+
+ return msg;
+}
+
+
+struct wpabuf * wps_enrollee_get_msg(struct wps_data *wps,
+ enum wsc_op_code *op_code)
+{
+ struct wpabuf *msg;
+
+ switch (wps->state) {
+ case SEND_M1:
+ msg = wps_build_m1(wps);
+ *op_code = WSC_MSG;
+ break;
+ case SEND_M3:
+ msg = wps_build_m3(wps);
+ *op_code = WSC_MSG;
+ break;
+ case SEND_M5:
+ msg = wps_build_m5(wps);
+ *op_code = WSC_MSG;
+ break;
+ case SEND_M7:
+ msg = wps_build_m7(wps);
+ *op_code = WSC_MSG;
+ break;
+ case RECEIVED_M2D:
+ if (wps->wps->ap) {
+ msg = wps_build_wsc_nack(wps);
+ *op_code = WSC_NACK;
+ break;
+ }
+ msg = wps_build_wsc_ack(wps);
+ *op_code = WSC_ACK;
+ if (msg) {
+ /* Another M2/M2D may be received */
+ wps->state = RECV_M2;
+ }
+ break;
+ case SEND_WSC_NACK:
+ msg = wps_build_wsc_nack(wps);
+ *op_code = WSC_NACK;
+ break;
+ case WPS_MSG_DONE:
+ msg = wps_build_wsc_done(wps);
+ *op_code = WSC_Done;
+ break;
+ default:
+ wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
+ "a message", wps->state);
+ msg = NULL;
+ break;
+ }
+
+ if (*op_code == WSC_MSG && msg) {
+ /* Save a copy of the last message for Authenticator derivation
+ */
+ wpabuf_free(wps->last_msg);
+ wps->last_msg = wpabuf_dup(msg);
+ }
+
+ return msg;
+}
+
+
+static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
+{
+ if (r_nonce == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
+ return -1;
+ }
+
+ os_memcpy(wps->nonce_r, r_nonce, WPS_NONCE_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
+ wps->nonce_r, WPS_NONCE_LEN);
+
+ return 0;
+}
+
+
+static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
+{
+ if (e_nonce == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
+ return -1;
+ }
+
+ if (os_memcmp(wps->nonce_e, e_nonce, WPS_NONCE_LEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce received");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int wps_process_uuid_r(struct wps_data *wps, const u8 *uuid_r)
+{
+ if (uuid_r == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No UUID-R received");
+ return -1;
+ }
+
+ os_memcpy(wps->uuid_r, uuid_r, WPS_UUID_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
+
+ return 0;
+}
+
+
+static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
+ size_t pk_len)
+{
+ if (pk == NULL || pk_len == 0) {
+ wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
+ return -1;
+ }
+
+#ifdef CONFIG_WPS_OOB
+ if (wps->dev_pw_id != DEV_PW_DEFAULT &&
+ wps->wps->oob_conf.pubkey_hash) {
+ const u8 *addr[1];
+ u8 hash[WPS_HASH_LEN];
+
+ addr[0] = pk;
+ sha256_vector(1, addr, &pk_len, hash);
+ if (os_memcmp(hash,
+ wpabuf_head(wps->wps->oob_conf.pubkey_hash),
+ WPS_OOB_PUBKEY_HASH_LEN) != 0) {
+ wpa_printf(MSG_ERROR, "WPS: Public Key hash error");
+ return -1;
+ }
+ }
+#endif /* CONFIG_WPS_OOB */
+
+ wpabuf_free(wps->dh_pubkey_r);
+ wps->dh_pubkey_r = wpabuf_alloc_copy(pk, pk_len);
+ if (wps->dh_pubkey_r == NULL)
+ return -1;
+
+ if (wps_derive_keys(wps) < 0)
+ return -1;
+
+ return 0;
+}
+
+
+static int wps_process_r_hash1(struct wps_data *wps, const u8 *r_hash1)
+{
+ if (r_hash1 == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No R-Hash1 received");
+ return -1;
+ }
+
+ os_memcpy(wps->peer_hash1, r_hash1, WPS_HASH_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", wps->peer_hash1, WPS_HASH_LEN);
+
+ return 0;
+}
+
+
+static int wps_process_r_hash2(struct wps_data *wps, const u8 *r_hash2)
+{
+ if (r_hash2 == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No R-Hash2 received");
+ return -1;
+ }
+
+ os_memcpy(wps->peer_hash2, r_hash2, WPS_HASH_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", wps->peer_hash2, WPS_HASH_LEN);
+
+ return 0;
+}
+
+
+static int wps_process_r_snonce1(struct wps_data *wps, const u8 *r_snonce1)
+{
+ u8 hash[SHA256_MAC_LEN];
+ const u8 *addr[4];
+ size_t len[4];
+
+ if (r_snonce1 == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No R-SNonce1 received");
+ return -1;
+ }
+
+ wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce1", r_snonce1,
+ WPS_SECRET_NONCE_LEN);
+
+ /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
+ addr[0] = r_snonce1;
+ len[0] = WPS_SECRET_NONCE_LEN;
+ addr[1] = wps->psk1;
+ len[1] = WPS_PSK_LEN;
+ addr[2] = wpabuf_head(wps->dh_pubkey_e);
+ len[2] = wpabuf_len(wps->dh_pubkey_e);
+ addr[3] = wpabuf_head(wps->dh_pubkey_r);
+ len[3] = wpabuf_len(wps->dh_pubkey_r);
+ hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
+
+ if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WPS: R-Hash1 derived from R-S1 does "
+ "not match with the pre-committed value");
+ wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
+ wps_pwd_auth_fail_event(wps->wps, 1, 1);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the first "
+ "half of the device password");
+
+ return 0;
+}
+
+
+static int wps_process_r_snonce2(struct wps_data *wps, const u8 *r_snonce2)
+{
+ u8 hash[SHA256_MAC_LEN];
+ const u8 *addr[4];
+ size_t len[4];
+
+ if (r_snonce2 == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No R-SNonce2 received");
+ return -1;
+ }
+
+ wpa_hexdump_key(MSG_DEBUG, "WPS: R-SNonce2", r_snonce2,
+ WPS_SECRET_NONCE_LEN);
+
+ /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
+ addr[0] = r_snonce2;
+ len[0] = WPS_SECRET_NONCE_LEN;
+ addr[1] = wps->psk2;
+ len[1] = WPS_PSK_LEN;
+ addr[2] = wpabuf_head(wps->dh_pubkey_e);
+ len[2] = wpabuf_len(wps->dh_pubkey_e);
+ addr[3] = wpabuf_head(wps->dh_pubkey_r);
+ len[3] = wpabuf_len(wps->dh_pubkey_r);
+ hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
+
+ if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WPS: R-Hash2 derived from R-S2 does "
+ "not match with the pre-committed value");
+ wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
+ wps_pwd_auth_fail_event(wps->wps, 1, 2);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: Registrar proved knowledge of the second "
+ "half of the device password");
+
+ return 0;
+}
+
+
+static int wps_process_cred_e(struct wps_data *wps, const u8 *cred,
+ size_t cred_len, int wps2)
+{
+ struct wps_parse_attr attr;
+ struct wpabuf msg;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received Credential");
+ os_memset(&wps->cred, 0, sizeof(wps->cred));
+ wpabuf_set(&msg, cred, cred_len);
+ if (wps_parse_msg(&msg, &attr) < 0 ||
+ wps_process_cred(&attr, &wps->cred))
+ return -1;
+
+ if (os_memcmp(wps->cred.mac_addr, wps->wps->dev.mac_addr, ETH_ALEN) !=
+ 0) {
+ wpa_printf(MSG_DEBUG, "WPS: MAC Address in the Credential ("
+ MACSTR ") does not match with own address (" MACSTR
+ ")", MAC2STR(wps->cred.mac_addr),
+ MAC2STR(wps->wps->dev.mac_addr));
+ /*
+ * In theory, this could be consider fatal error, but there are
+ * number of deployed implementations using other address here
+ * due to unclarity in the specification. For interoperability
+ * reasons, allow this to be processed since we do not really
+ * use the MAC Address information for anything.
+ */
+#ifdef CONFIG_WPS_STRICT
+ if (wps2) {
+ wpa_printf(MSG_INFO, "WPS: Do not accept incorrect "
+ "MAC Address in AP Settings");
+ return -1;
+ }
+#endif /* CONFIG_WPS_STRICT */
+ }
+
+#ifdef CONFIG_WPS2
+ if (!(wps->cred.encr_type &
+ (WPS_ENCR_NONE | WPS_ENCR_TKIP | WPS_ENCR_AES))) {
+ if (wps->cred.encr_type & WPS_ENCR_WEP) {
+ wpa_printf(MSG_INFO, "WPS: Reject Credential "
+ "due to WEP configuration");
+ return -2;
+ }
+
+ wpa_printf(MSG_INFO, "WPS: Reject Credential due to "
+ "invalid encr_type 0x%x", wps->cred.encr_type);
+ return -1;
+ }
+#endif /* CONFIG_WPS2 */
+
+ if (wps->wps->cred_cb) {
+ wps->cred.cred_attr = cred - 4;
+ wps->cred.cred_attr_len = cred_len + 4;
+ wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
+ wps->cred.cred_attr = NULL;
+ wps->cred.cred_attr_len = 0;
+ }
+
+ return 0;
+}
+
+
+static int wps_process_creds(struct wps_data *wps, const u8 *cred[],
+ size_t cred_len[], size_t num_cred, int wps2)
+{
+ size_t i;
+ int ok = 0;
+
+ if (wps->wps->ap)
+ return 0;
+
+ if (num_cred == 0) {
+ wpa_printf(MSG_DEBUG, "WPS: No Credential attributes "
+ "received");
+ return -1;
+ }
+
+ for (i = 0; i < num_cred; i++) {
+ int res;
+ res = wps_process_cred_e(wps, cred[i], cred_len[i], wps2);
+ if (res == 0)
+ ok++;
+ else if (res == -2)
+ wpa_printf(MSG_DEBUG, "WPS: WEP credential skipped");
+ else
+ return -1;
+ }
+
+ if (ok == 0) {
+ wpa_printf(MSG_DEBUG, "WPS: No valid Credential attribute "
+ "received");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int wps_process_ap_settings_e(struct wps_data *wps,
+ struct wps_parse_attr *attr,
+ struct wpabuf *attrs, int wps2)
+{
+ struct wps_credential cred;
+
+ if (!wps->wps->ap)
+ return 0;
+
+ if (wps_process_ap_settings(attr, &cred) < 0)
+ return -1;
+
+ wpa_printf(MSG_INFO, "WPS: Received new AP configuration from "
+ "Registrar");
+
+ if (os_memcmp(cred.mac_addr, wps->wps->dev.mac_addr, ETH_ALEN) !=
+ 0) {
+ wpa_printf(MSG_DEBUG, "WPS: MAC Address in the AP Settings ("
+ MACSTR ") does not match with own address (" MACSTR
+ ")", MAC2STR(cred.mac_addr),
+ MAC2STR(wps->wps->dev.mac_addr));
+ /*
+ * In theory, this could be consider fatal error, but there are
+ * number of deployed implementations using other address here
+ * due to unclarity in the specification. For interoperability
+ * reasons, allow this to be processed since we do not really
+ * use the MAC Address information for anything.
+ */
+#ifdef CONFIG_WPS_STRICT
+ if (wps2) {
+ wpa_printf(MSG_INFO, "WPS: Do not accept incorrect "
+ "MAC Address in AP Settings");
+ return -1;
+ }
+#endif /* CONFIG_WPS_STRICT */
+ }
+
+#ifdef CONFIG_WPS2
+ if (!(cred.encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | WPS_ENCR_AES)))
+ {
+ if (cred.encr_type & WPS_ENCR_WEP) {
+ wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
+ "due to WEP configuration");
+ return -1;
+ }
+
+ wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
+ "invalid encr_type 0x%x", cred.encr_type);
+ return -1;
+ }
+#endif /* CONFIG_WPS2 */
+
+#ifdef CONFIG_WPS_STRICT
+ if (wps2) {
+ if ((cred.encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
+ WPS_ENCR_TKIP ||
+ (cred.auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
+ WPS_AUTH_WPAPSK) {
+ wpa_printf(MSG_INFO, "WPS-STRICT: Invalid WSC 2.0 "
+ "AP Settings: WPA-Personal/TKIP only");
+ return -1;
+ }
+ }
+#endif /* CONFIG_WPS_STRICT */
+
+#ifdef CONFIG_WPS2
+ if ((cred.encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == WPS_ENCR_TKIP)
+ {
+ wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
+ "TKIP+AES");
+ cred.encr_type |= WPS_ENCR_AES;
+ }
+
+ if ((cred.auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
+ WPS_AUTH_WPAPSK) {
+ wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
+ "WPAPSK+WPA2PSK");
+ cred.auth_type |= WPS_AUTH_WPA2PSK;
+ }
+#endif /* CONFIG_WPS2 */
+
+ if (wps->wps->cred_cb) {
+ cred.cred_attr = wpabuf_head(attrs);
+ cred.cred_attr_len = wpabuf_len(attrs);
+ wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
+ }
+
+ return 0;
+}
+
+
+static enum wps_process_res wps_process_m2(struct wps_data *wps,
+ const struct wpabuf *msg,
+ struct wps_parse_attr *attr)
+{
+ wpa_printf(MSG_DEBUG, "WPS: Received M2");
+
+ if (wps->state != RECV_M2) {
+ wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
+ "receiving M2", wps->state);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
+ wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
+ wps_process_uuid_r(wps, attr->uuid_r)) {
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps->wps->ap &&
+ (wps->wps->ap_setup_locked || wps->dev_password == NULL)) {
+ wpa_printf(MSG_DEBUG, "WPS: AP Setup is locked - refuse "
+ "registration of a new Registrar");
+ wps->config_error = WPS_CFG_SETUP_LOCKED;
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
+ wps_process_authenticator(wps, attr->authenticator, msg) ||
+ wps_process_device_attrs(&wps->peer_dev, attr)) {
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ wps->state = SEND_M3;
+ return WPS_CONTINUE;
+}
+
+
+static enum wps_process_res wps_process_m2d(struct wps_data *wps,
+ struct wps_parse_attr *attr)
+{
+ wpa_printf(MSG_DEBUG, "WPS: Received M2D");
+
+ if (wps->state != RECV_M2) {
+ wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
+ "receiving M2D", wps->state);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ wpa_hexdump_ascii(MSG_DEBUG, "WPS: Manufacturer",
+ attr->manufacturer, attr->manufacturer_len);
+ wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Name",
+ attr->model_name, attr->model_name_len);
+ wpa_hexdump_ascii(MSG_DEBUG, "WPS: Model Number",
+ attr->model_number, attr->model_number_len);
+ wpa_hexdump_ascii(MSG_DEBUG, "WPS: Serial Number",
+ attr->serial_number, attr->serial_number_len);
+ wpa_hexdump_ascii(MSG_DEBUG, "WPS: Device Name",
+ attr->dev_name, attr->dev_name_len);
+
+ if (wps->wps->event_cb) {
+ union wps_event_data data;
+ struct wps_event_m2d *m2d = &data.m2d;
+ os_memset(&data, 0, sizeof(data));
+ if (attr->config_methods)
+ m2d->config_methods =
+ WPA_GET_BE16(attr->config_methods);
+ m2d->manufacturer = attr->manufacturer;
+ m2d->manufacturer_len = attr->manufacturer_len;
+ m2d->model_name = attr->model_name;
+ m2d->model_name_len = attr->model_name_len;
+ m2d->model_number = attr->model_number;
+ m2d->model_number_len = attr->model_number_len;
+ m2d->serial_number = attr->serial_number;
+ m2d->serial_number_len = attr->serial_number_len;
+ m2d->dev_name = attr->dev_name;
+ m2d->dev_name_len = attr->dev_name_len;
+ m2d->primary_dev_type = attr->primary_dev_type;
+ if (attr->config_error)
+ m2d->config_error =
+ WPA_GET_BE16(attr->config_error);
+ if (attr->dev_password_id)
+ m2d->dev_password_id =
+ WPA_GET_BE16(attr->dev_password_id);
+ wps->wps->event_cb(wps->wps->cb_ctx, WPS_EV_M2D, &data);
+ }
+
+ wps->state = RECEIVED_M2D;
+ return WPS_CONTINUE;
+}
+
+
+static enum wps_process_res wps_process_m4(struct wps_data *wps,
+ const struct wpabuf *msg,
+ struct wps_parse_attr *attr)
+{
+ struct wpabuf *decrypted;
+ struct wps_parse_attr eattr;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received M4");
+
+ if (wps->state != RECV_M4) {
+ wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
+ "receiving M4", wps->state);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
+ wps_process_authenticator(wps, attr->authenticator, msg) ||
+ wps_process_r_hash1(wps, attr->r_hash1) ||
+ wps_process_r_hash2(wps, attr->r_hash2)) {
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
+ attr->encr_settings_len);
+ if (decrypted == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
+ "Settings attribute");
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_validate_m4_encr(decrypted, attr->version2 != 0) < 0) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
+ "attribute");
+ if (wps_parse_msg(decrypted, &eattr) < 0 ||
+ wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
+ wps_process_r_snonce1(wps, eattr.r_snonce1)) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+ wpabuf_free(decrypted);
+
+ wps->state = SEND_M5;
+ return WPS_CONTINUE;
+}
+
+
+static enum wps_process_res wps_process_m6(struct wps_data *wps,
+ const struct wpabuf *msg,
+ struct wps_parse_attr *attr)
+{
+ struct wpabuf *decrypted;
+ struct wps_parse_attr eattr;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received M6");
+
+ if (wps->state != RECV_M6) {
+ wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
+ "receiving M6", wps->state);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
+ wps_process_authenticator(wps, attr->authenticator, msg)) {
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
+ attr->encr_settings_len);
+ if (decrypted == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
+ "Settings attribute");
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_validate_m6_encr(decrypted, attr->version2 != 0) < 0) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
+ "attribute");
+ if (wps_parse_msg(decrypted, &eattr) < 0 ||
+ wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
+ wps_process_r_snonce2(wps, eattr.r_snonce2)) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+ wpabuf_free(decrypted);
+
+ wps->state = SEND_M7;
+ return WPS_CONTINUE;
+}
+
+
+static enum wps_process_res wps_process_m8(struct wps_data *wps,
+ const struct wpabuf *msg,
+ struct wps_parse_attr *attr)
+{
+ struct wpabuf *decrypted;
+ struct wps_parse_attr eattr;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received M8");
+
+ if (wps->state != RECV_M8) {
+ wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
+ "receiving M8", wps->state);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
+ wps_process_authenticator(wps, attr->authenticator, msg)) {
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
+ attr->encr_settings_len);
+ if (decrypted == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
+ "Settings attribute");
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ if (wps_validate_m8_encr(decrypted, wps->wps->ap, attr->version2 != 0)
+ < 0) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+
+ wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
+ "attribute");
+ if (wps_parse_msg(decrypted, &eattr) < 0 ||
+ wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
+ wps_process_creds(wps, eattr.cred, eattr.cred_len,
+ eattr.num_cred, attr->version2 != NULL) ||
+ wps_process_ap_settings_e(wps, &eattr, decrypted,
+ attr->version2 != NULL)) {
+ wpabuf_free(decrypted);
+ wps->state = SEND_WSC_NACK;
+ return WPS_CONTINUE;
+ }
+ wpabuf_free(decrypted);
+
+ wps->state = WPS_MSG_DONE;
+ return WPS_CONTINUE;
+}
+
+
+static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
+ const struct wpabuf *msg)
+{
+ struct wps_parse_attr attr;
+ enum wps_process_res ret = WPS_CONTINUE;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
+
+ if (wps_parse_msg(msg, &attr) < 0)
+ return WPS_FAILURE;
+
+ if (attr.enrollee_nonce == NULL ||
+ os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
+ wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
+ return WPS_FAILURE;
+ }
+
+ if (attr.msg_type == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
+ return WPS_FAILURE;
+ }
+
+ switch (*attr.msg_type) {
+ case WPS_M2:
+ if (wps_validate_m2(msg) < 0)
+ return WPS_FAILURE;
+ ret = wps_process_m2(wps, msg, &attr);
+ break;
+ case WPS_M2D:
+ if (wps_validate_m2d(msg) < 0)
+ return WPS_FAILURE;
+ ret = wps_process_m2d(wps, &attr);
+ break;
+ case WPS_M4:
+ if (wps_validate_m4(msg) < 0)
+ return WPS_FAILURE;
+ ret = wps_process_m4(wps, msg, &attr);
+ if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
+ wps_fail_event(wps->wps, WPS_M4, wps->config_error);
+ break;
+ case WPS_M6:
+ if (wps_validate_m6(msg) < 0)
+ return WPS_FAILURE;
+ ret = wps_process_m6(wps, msg, &attr);
+ if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
+ wps_fail_event(wps->wps, WPS_M6, wps->config_error);
+ break;
+ case WPS_M8:
+ if (wps_validate_m8(msg) < 0)
+ return WPS_FAILURE;
+ ret = wps_process_m8(wps, msg, &attr);
+ if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
+ wps_fail_event(wps->wps, WPS_M8, wps->config_error);
+ break;
+ default:
+ wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
+ *attr.msg_type);
+ return WPS_FAILURE;
+ }
+
+ /*
+ * Save a copy of the last message for Authenticator derivation if we
+ * are continuing. However, skip M2D since it is not authenticated and
+ * neither is the ACK/NACK response frame. This allows the possibly
+ * following M2 to be processed correctly by using the previously sent
+ * M1 in Authenticator derivation.
+ */
+ if (ret == WPS_CONTINUE && *attr.msg_type != WPS_M2D) {
+ /* Save a copy of the last message for Authenticator derivation
+ */
+ wpabuf_free(wps->last_msg);
+ wps->last_msg = wpabuf_dup(msg);
+ }
+
+ return ret;
+}
+
+
+static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
+ const struct wpabuf *msg)
+{
+ struct wps_parse_attr attr;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
+
+ if (wps_parse_msg(msg, &attr) < 0)
+ return WPS_FAILURE;
+
+ if (attr.msg_type == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
+ return WPS_FAILURE;
+ }
+
+ if (*attr.msg_type != WPS_WSC_ACK) {
+ wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
+ *attr.msg_type);
+ return WPS_FAILURE;
+ }
+
+ if (attr.registrar_nonce == NULL ||
+ os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
+ {
+ wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
+ return WPS_FAILURE;
+ }
+
+ if (attr.enrollee_nonce == NULL ||
+ os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
+ wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
+ return WPS_FAILURE;
+ }
+
+ if (wps->state == RECV_ACK && wps->wps->ap) {
+ wpa_printf(MSG_DEBUG, "WPS: External Registrar registration "
+ "completed successfully");
+ wps_success_event(wps->wps);
+ wps->state = WPS_FINISHED;
+ return WPS_DONE;
+ }
+
+ return WPS_FAILURE;
+}
+
+
+static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
+ const struct wpabuf *msg)
+{
+ struct wps_parse_attr attr;
+ u16 config_error;
+
+ wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
+
+ if (wps_parse_msg(msg, &attr) < 0)
+ return WPS_FAILURE;
+
+ if (attr.msg_type == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
+ return WPS_FAILURE;
+ }
+
+ if (*attr.msg_type != WPS_WSC_NACK) {
+ wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
+ *attr.msg_type);
+ return WPS_FAILURE;
+ }
+
+ if (attr.registrar_nonce == NULL ||
+ os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0))
+ {
+ wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
+ wpa_hexdump(MSG_DEBUG, "WPS: Received Registrar Nonce",
+ attr.registrar_nonce, WPS_NONCE_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: Expected Registrar Nonce",
+ wps->nonce_r, WPS_NONCE_LEN);
+ return WPS_FAILURE;
+ }
+
+ if (attr.enrollee_nonce == NULL ||
+ os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) {
+ wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
+ wpa_hexdump(MSG_DEBUG, "WPS: Received Enrollee Nonce",
+ attr.enrollee_nonce, WPS_NONCE_LEN);
+ wpa_hexdump(MSG_DEBUG, "WPS: Expected Enrollee Nonce",
+ wps->nonce_e, WPS_NONCE_LEN);
+ return WPS_FAILURE;
+ }
+
+ if (attr.config_error == NULL) {
+ wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
+ "in WSC_NACK");
+ return WPS_FAILURE;
+ }
+
+ config_error = WPA_GET_BE16(attr.config_error);
+ wpa_printf(MSG_DEBUG, "WPS: Registrar terminated negotiation with "
+ "Configuration Error %d", config_error);
+
+ switch (wps->state) {
+ case RECV_M4:
+ wps_fail_event(wps->wps, WPS_M3, config_error);
+ break;
+ case RECV_M6:
+ wps_fail_event(wps->wps, WPS_M5, config_error);
+ break;
+ case RECV_M8:
+ wps_fail_event(wps->wps, WPS_M7, config_error);
+ break;
+ default:
+ break;
+ }
+
+ /* Followed by NACK if Enrollee is Supplicant or EAP-Failure if
+ * Enrollee is Authenticator */
+ wps->state = SEND_WSC_NACK;
+
+ return WPS_FAILURE;
+}
+
+
+enum wps_process_res wps_enrollee_process_msg(struct wps_data *wps,
+ enum wsc_op_code op_code,
+ const struct wpabuf *msg)
+{
+
+ wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
+ "op_code=%d)",
+ (unsigned long) wpabuf_len(msg), op_code);
+
+ if (op_code == WSC_UPnP) {
+ /* Determine the OpCode based on message type attribute */
+ struct wps_parse_attr attr;
+ if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type) {
+ if (*attr.msg_type == WPS_WSC_ACK)
+ op_code = WSC_ACK;
+ else if (*attr.msg_type == WPS_WSC_NACK)
+ op_code = WSC_NACK;
+ }
+ }
+
+ switch (op_code) {
+ case WSC_MSG:
+ case WSC_UPnP:
+ return wps_process_wsc_msg(wps, msg);
+ case WSC_ACK:
+ if (wps_validate_wsc_ack(msg) < 0)
+ return WPS_FAILURE;
+ return wps_process_wsc_ack(wps, msg);
+ case WSC_NACK:
+ if (wps_validate_wsc_nack(msg) < 0)
+ return WPS_FAILURE;
+ return wps_process_wsc_nack(wps, msg);
+ default:
+ wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
+ return WPS_FAILURE;
+ }
+}
projects / mech_eap.orig / blobdiff