* Wi-Fi Protected Setup - attribute building
* 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "includes.h"
#include "crypto/crypto.h"
#include "crypto/dh_group5.h"
#include "crypto/sha256.h"
+#include "crypto/random.h"
#include "common/ieee802_11_defs.h"
#include "wps_i.h"
wpa_printf(MSG_DEBUG, "WPS: * Public Key");
wpabuf_free(wps->dh_privkey);
- if (wps->dev_pw_id != DEV_PW_DEFAULT && wps->wps->dh_privkey) {
+ wps->dh_privkey = NULL;
+ if (wps->dev_pw_id != DEV_PW_DEFAULT && wps->wps->dh_privkey &&
+ wps->wps->dh_ctx) {
wpa_printf(MSG_DEBUG, "WPS: Using pre-configured DH keys");
+ if (wps->wps->dh_pubkey == NULL) {
+ wpa_printf(MSG_DEBUG,
+ "WPS: wps->wps->dh_pubkey == NULL");
+ return -1;
+ }
wps->dh_privkey = wpabuf_dup(wps->wps->dh_privkey);
wps->dh_ctx = wps->wps->dh_ctx;
wps->wps->dh_ctx = NULL;
pubkey = wpabuf_dup(wps->wps->dh_pubkey);
+#ifdef CONFIG_WPS_NFC
+ } else if ((wps->dev_pw_id >= 0x10 ||
+ wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) &&
+ (wps->wps->ap ||
+ (wps->wps->ap_nfc_dh_pubkey &&
+ wps->wps->ap_nfc_dev_pw_id ==
+ DEV_PW_NFC_CONNECTION_HANDOVER &&
+ wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)) &&
+ (wps->dev_pw_id == wps->wps->ap_nfc_dev_pw_id ||
+ wps->wps->ap_nfc_dh_pubkey)) {
+ wpa_printf(MSG_DEBUG, "WPS: Using NFC password token DH keys");
+ if (wps->wps->ap_nfc_dh_privkey == NULL) {
+ wpa_printf(MSG_DEBUG,
+ "WPS: wps->wps->ap_nfc_dh_privkey == NULL");
+ return -1;
+ }
+ if (wps->wps->ap_nfc_dh_pubkey == NULL) {
+ wpa_printf(MSG_DEBUG,
+ "WPS: wps->wps->ap_nfc_dh_pubkey == NULL");
+ return -1;
+ }
+ wps->dh_privkey = wpabuf_dup(wps->wps->ap_nfc_dh_privkey);
+ pubkey = wpabuf_dup(wps->wps->ap_nfc_dh_pubkey);
+ wps->dh_ctx = dh5_init_fixed(wps->dh_privkey, pubkey);
+#endif /* CONFIG_WPS_NFC */
} else {
wpa_printf(MSG_DEBUG, "WPS: Generate new DH keys");
- wps->dh_privkey = NULL;
dh5_free(wps->dh_ctx);
wps->dh_ctx = dh5_init(&wps->dh_privkey, &pubkey);
pubkey = wpabuf_zeropad(pubkey, 192);
int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid)
{
+ if (wpabuf_tailroom(msg) < 4 + WPS_UUID_LEN)
+ return -1;
wpa_printf(MSG_DEBUG, "WPS: * UUID-E");
wpabuf_put_be16(msg, ATTR_UUID_E);
wpabuf_put_be16(msg, WPS_UUID_LEN);
* backwards compatibility reasons. The real version negotiation is
* done with Version2.
*/
+ if (wpabuf_tailroom(msg) < 5)
+ return -1;
wpa_printf(MSG_DEBUG, "WPS: * Version (hardcoded 0x10)");
wpabuf_put_be16(msg, ATTR_VERSION);
wpabuf_put_be16(msg, 1);
int wps_build_wfa_ext(struct wpabuf *msg, int req_to_enroll,
const u8 *auth_macs, size_t auth_macs_count)
{
-#ifdef CONFIG_WPS2
u8 *len;
+#ifdef CONFIG_WPS_TESTING
+ if (WPS_VERSION == 0x10)
+ return 0;
+#endif /* CONFIG_WPS_TESTING */
+
+ if (wpabuf_tailroom(msg) <
+ 7 + 3 + (req_to_enroll ? 3 : 0) +
+ (auth_macs ? 2 + auth_macs_count * ETH_ALEN : 0))
+ return -1;
wpabuf_put_be16(msg, ATTR_VENDOR_EXT);
len = wpabuf_put(msg, 2); /* to be filled */
wpabuf_put_be24(msg, WPS_VENDOR_ID_WFA);
}
WPA_PUT_BE16(len, (u8 *) wpabuf_put(msg, 0) - len - 2);
-#endif /* CONFIG_WPS2 */
#ifdef CONFIG_WPS_TESTING
if (WPS_VERSION > 0x20) {
+ if (wpabuf_tailroom(msg) < 5)
+ return -1;
wpa_printf(MSG_DEBUG, "WPS: * Extensibility Testing - extra "
"attribute");
wpabuf_put_be16(msg, ATTR_EXTENSIBILITY_TEST);
int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
+ u16 auth_types = WPS_AUTH_TYPES;
+ /* WPA/WPA2-Enterprise enrollment not supported through WPS */
+ auth_types &= ~WPS_AUTH_WPA;
+ auth_types &= ~WPS_AUTH_WPA2;
+ auth_types &= ~WPS_AUTH_SHARED;
wpa_printf(MSG_DEBUG, "WPS: * Authentication Type Flags");
wpabuf_put_be16(msg, ATTR_AUTH_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
- wpabuf_put_be16(msg, WPS_AUTH_TYPES);
+ wpabuf_put_be16(msg, auth_types);
return 0;
}
int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
+ u16 encr_types = WPS_ENCR_TYPES;
+ encr_types &= ~WPS_ENCR_WEP;
wpa_printf(MSG_DEBUG, "WPS: * Encryption Type Flags");
wpabuf_put_be16(msg, ATTR_ENCR_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
- wpabuf_put_be16(msg, WPS_ENCR_TYPES);
+ wpabuf_put_be16(msg, encr_types);
return 0;
}
wpabuf_put_be16(msg, block_size + wpabuf_len(plain));
iv = wpabuf_put(msg, block_size);
- if (os_get_random(iv, block_size) < 0)
+ if (random_get_bytes(iv, block_size) < 0)
return -1;
data = wpabuf_put(msg, 0);
#ifdef CONFIG_WPS_OOB
-int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps)
+int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
+ const struct wpabuf *pubkey, const u8 *dev_pw,
+ size_t dev_pw_len)
{
size_t hash_len;
const u8 *addr[1];
u8 pubkey_hash[WPS_HASH_LEN];
- u8 dev_password_bin[WPS_OOB_DEVICE_PASSWORD_LEN];
-
- wpa_printf(MSG_DEBUG, "WPS: * OOB Device Password");
- addr[0] = wpabuf_head(wps->dh_pubkey);
- hash_len = wpabuf_len(wps->dh_pubkey);
+ wpa_printf(MSG_DEBUG, "WPS: * OOB Device Password (dev_pw_id=%u)",
+ dev_pw_id);
+ addr[0] = wpabuf_head(pubkey);
+ hash_len = wpabuf_len(pubkey);
sha256_vector(1, addr, &hash_len, pubkey_hash);
-
- if (os_get_random((u8 *) &wps->oob_dev_pw_id, sizeof(u16)) < 0) {
- wpa_printf(MSG_ERROR, "WPS: device password id "
- "generation error");
- return -1;
- }
- wps->oob_dev_pw_id |= 0x0010;
-
- if (os_get_random(dev_password_bin, WPS_OOB_DEVICE_PASSWORD_LEN) < 0) {
- wpa_printf(MSG_ERROR, "WPS: OOB device password "
- "generation error");
- return -1;
+#ifdef CONFIG_WPS_TESTING
+ if (wps_corrupt_pkhash) {
+ wpa_hexdump(MSG_DEBUG, "WPS: Real Public Key Hash",
+ pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
+ wpa_printf(MSG_INFO, "WPS: Testing - corrupt public key hash");
+ pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN - 2]++;
}
+#endif /* CONFIG_WPS_TESTING */
wpabuf_put_be16(msg, ATTR_OOB_DEVICE_PASSWORD);
- wpabuf_put_be16(msg, WPS_OOB_DEVICE_PASSWORD_ATTR_LEN);
+ wpabuf_put_be16(msg, WPS_OOB_PUBKEY_HASH_LEN + 2 + dev_pw_len);
+ wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
+ pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
wpabuf_put_data(msg, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
- wpabuf_put_be16(msg, wps->oob_dev_pw_id);
- wpabuf_put_data(msg, dev_password_bin, WPS_OOB_DEVICE_PASSWORD_LEN);
-
- wpa_snprintf_hex_uppercase(
- wpabuf_put(wps->oob_conf.dev_password,
- wpabuf_size(wps->oob_conf.dev_password)),
- wpabuf_size(wps->oob_conf.dev_password),
- dev_password_bin, WPS_OOB_DEVICE_PASSWORD_LEN);
+ wpabuf_put_be16(msg, dev_pw_id);
+ if (dev_pw) {
+ wpa_hexdump_key(MSG_DEBUG, "WPS: OOB Device Password",
+ dev_pw, dev_pw_len);
+ wpabuf_put_data(msg, dev_pw, dev_pw_len);
+ }
return 0;
}
return ie;
}
+
+
+int wps_build_mac_addr(struct wpabuf *msg, const u8 *addr)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")",
+ MAC2STR(addr));
+ wpabuf_put_be16(msg, ATTR_MAC_ADDR);
+ wpabuf_put_be16(msg, ETH_ALEN);
+ wpabuf_put_data(msg, addr, ETH_ALEN);
+ return 0;
+}
+
+
+int wps_build_rf_bands_attr(struct wpabuf *msg, u8 rf_bands)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * RF Bands (%x)", rf_bands);
+ wpabuf_put_be16(msg, ATTR_RF_BANDS);
+ wpabuf_put_be16(msg, 1);
+ wpabuf_put_u8(msg, rf_bands);
+ return 0;
+}
+
+
+int wps_build_ap_channel(struct wpabuf *msg, u16 ap_channel)
+{
+ wpa_printf(MSG_DEBUG, "WPS: * AP Channel (%u)", ap_channel);
+ wpabuf_put_be16(msg, ATTR_AP_CHANNEL);
+ wpabuf_put_be16(msg, 2);
+ wpabuf_put_be16(msg, ap_channel);
+ return 0;
+}
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