1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.settings.vpn2; 17 18 import android.content.Context; 19 import android.net.ConnectivityManager; 20 import android.security.Credentials; 21 import android.security.KeyStore; 22 23 /** 24 * Utility functions for vpn. 25 * 26 * Keystore methods should only be called in system user 27 */ 28 public class VpnUtils { 29 30 public static String getLockdownVpn() { 31 final byte[] value = KeyStore.getInstance().get(Credentials.LOCKDOWN_VPN); 32 return value == null ? null : new String(value); 33 } 34 35 public static void clearLockdownVpn(Context context) { 36 KeyStore.getInstance().delete(Credentials.LOCKDOWN_VPN); 37 // Always notify ConnectivityManager after keystore update 38 context.getSystemService(ConnectivityManager.class).updateLockdownVpn(); 39 } 40 41 public static void setLockdownVpn(Context context, String lockdownKey) { 42 KeyStore.getInstance().put(Credentials.LOCKDOWN_VPN, lockdownKey.getBytes(), 43 KeyStore.UID_SELF, /* flags */ 0); 44 // Always notify ConnectivityManager after keystore update 45 context.getSystemService(ConnectivityManager.class).updateLockdownVpn(); 46 } 47 48 public static boolean isVpnLockdown(String key) { 49 return key.equals(getLockdownVpn()); 50 } 51 } 52
