src/com/android/settings/CryptKeeperConfirm.java

   1 /*
   2  * Copyright (C) 2011 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
  17 package com.android.settings;
  18
  19 import android.app.Activity;
  20 import android.app.StatusBarManager;
  21 import android.content.Context;
  22 import android.content.Intent;
  23 import android.os.Bundle;
  24 import android.os.Handler;
  25 import android.os.IBinder;
  26 import android.os.ServiceManager;
  27 import android.os.UserHandle;
  28 import android.os.storage.IStorageManager;
  29 import android.provider.Settings;
  30 import android.util.Log;
  31 import android.view.LayoutInflater;
  32 import android.view.View;
  33 import android.view.ViewGroup;
  34 import android.widget.Button;
  35
  36 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
  37 import com.android.internal.widget.LockPatternUtils;
  38 import com.android.settings.core.InstrumentedPreferenceFragment;
  39
  40 import java.util.Locale;
  41
  42 public class CryptKeeperConfirm extends InstrumentedPreferenceFragment {
  43
  44     private static final String TAG = "CryptKeeperConfirm";
  45
  46     @Override
  47     public int getMetricsCategory() {
  48         return MetricsEvent.CRYPT_KEEPER_CONFIRM;
  49     }
  50
  51     public static class Blank extends Activity {
  52         private Handler mHandler = new Handler();
  53
  54         @Override
  55         public void onCreate(Bundle savedInstanceState) {
  56             super.onCreate(savedInstanceState);
  57
  58             setContentView(R.layout.crypt_keeper_blank);
  59
  60             if (Utils.isMonkeyRunning()) {
  61                 finish();
  62             }
  63
  64             StatusBarManager sbm = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
  65             sbm.disable(StatusBarManager.DISABLE_EXPAND
  66                     | StatusBarManager.DISABLE_NOTIFICATION_ICONS
  67                     | StatusBarManager.DISABLE_NOTIFICATION_ALERTS
  68                     | StatusBarManager.DISABLE_SYSTEM_INFO
  69                     | StatusBarManager.DISABLE_HOME
  70                     | StatusBarManager.DISABLE_SEARCH
  71                     | StatusBarManager.DISABLE_RECENT
  72                     | StatusBarManager.DISABLE_BACK);
  73
  74             // Post a delayed message in 700 milliseconds to enable encryption.
  75             // NOTE: The animation on this activity is set for 500 milliseconds
  76             // I am giving it a little extra time to complete.
  77             mHandler.postDelayed(new Runnable() {
  78                 public void run() {
  79                     IBinder service = ServiceManager.getService("mount");
  80                     if (service == null) {
  81                         Log.e("CryptKeeper", "Failed to find the mount service");
  82                         finish();
  83                         return;
  84                     }
  85
  86                     IStorageManager storageManager = IStorageManager.Stub.asInterface(service);
  87                     try {
  88                         Bundle args = getIntent().getExtras();
  89                         storageManager.encryptStorage(args.getInt("type", -1), args.getString("password"));
  90                     } catch (Exception e) {
  91                         Log.e("CryptKeeper", "Error while encrypting...", e);
  92                     }
  93                 }
  94             }, 700);
  95         }
  96     }
  97
  98     private View mContentView;
  99     private Button mFinalButton;
 100     private Button.OnClickListener mFinalClickListener = new Button.OnClickListener() {
 101
 102         public void onClick(View v) {
 103             if (Utils.isMonkeyRunning()) {
 104                 return;
 105             }
 106
 107             /* WARNING - nasty hack!
 108                Settings for the lock screen are not available to the crypto
 109                screen (CryptKeeper) at boot. We duplicate the ones that
 110                CryptKeeper needs to the crypto key/value store when they are
 111                modified (see LockPatternUtils).
 112                However, prior to encryption, the crypto key/value store is not
 113                persisted across reboots, thus modified settings are lost to
 114                CryptKeeper.
 115                In order to make sure CryptKeeper had the correct settings after
 116                first encrypting, we thus need to rewrite them, which ensures the
 117                crypto key/value store is up to date. On encryption, this store
 118                is then persisted, and the settings will be there on future
 119                reboots.
 120              */
 121
 122             // 1. The owner info.
 123             LockPatternUtils utils = new LockPatternUtils(getActivity());
 124             utils.setVisiblePatternEnabled(
 125                     utils.isVisiblePatternEnabled(UserHandle.USER_SYSTEM),
 126                     UserHandle.USER_SYSTEM);
 127             if (utils.isOwnerInfoEnabled(UserHandle.USER_SYSTEM)) {
 128                 utils.setOwnerInfo(utils.getOwnerInfo(UserHandle.USER_SYSTEM),
 129                                    UserHandle.USER_SYSTEM);
 130             }
 131             int value = Settings.System.getInt(getContext().getContentResolver(),
 132                                                Settings.System.TEXT_SHOW_PASSWORD,
 133                                                1);
 134             utils.setVisiblePasswordEnabled(value != 0, UserHandle.USER_SYSTEM);
 135
 136             Intent intent = new Intent(getActivity(), Blank.class);
 137             intent.putExtras(getArguments());
 138             startActivity(intent);
 139
 140             // 2. The system locale.
 141             try {
 142                 IBinder service = ServiceManager.getService("mount");
 143                 IStorageManager storageManager = IStorageManager.Stub.asInterface(service);
 144                 storageManager.setField("SystemLocale", Locale.getDefault().toLanguageTag());
 145             } catch (Exception e) {
 146                 Log.e(TAG, "Error storing locale for decryption UI", e);
 147             }
 148         }
 149     };
 150
 151     private void establishFinalConfirmationState() {
 152         mFinalButton = (Button) mContentView.findViewById(R.id.execute_encrypt);
 153         mFinalButton.setOnClickListener(mFinalClickListener);
 154     }
 155
 156     @Override
 157     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 158             Bundle savedInstanceState) {
 159         mContentView = inflater.inflate(R.layout.crypt_keeper_confirm, null);
 160         establishFinalConfirmationState();
 161         return mContentView;
 162     }
 163 }