| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.settings.vpn2; |
| |
| import android.content.Context; |
| import android.net.ConnectivityManager; |
| import android.security.Credentials; |
| import android.security.KeyStore; |
| |
| /** |
| * Utility functions for vpn. |
| * |
| * Keystore methods should only be called in system user |
| */ |
| public class VpnUtils { |
| |
| public static String getLockdownVpn() { |
| final byte[] value = KeyStore.getInstance().get(Credentials.LOCKDOWN_VPN); |
| return value == null ? null : new String(value); |
| } |
| |
| public static void clearLockdownVpn(Context context) { |
| KeyStore.getInstance().delete(Credentials.LOCKDOWN_VPN); |
| // Always notify ConnectivityManager after keystore update |
| context.getSystemService(ConnectivityManager.class).updateLockdownVpn(); |
| } |
| |
| public static void setLockdownVpn(Context context, String lockdownKey) { |
| KeyStore.getInstance().put(Credentials.LOCKDOWN_VPN, lockdownKey.getBytes(), |
| KeyStore.UID_SELF, /* flags */ 0); |
| // Always notify ConnectivityManager after keystore update |
| context.getSystemService(ConnectivityManager.class).updateLockdownVpn(); |
| } |
| |
| public static boolean isVpnLockdown(String key) { |
| return key.equals(getLockdownVpn()); |
| } |
| } |