1 /* 2 * Copyright (C) 2017 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.development; 18 19 import android.content.Context; 20 import android.os.RemoteException; 21 import android.os.ServiceManager; 22 import android.os.storage.IStorageManager; 23 import android.text.TextUtils; 24 import android.sysprop.CryptoProperties; 25 import androidx.annotation.VisibleForTesting; 26 import androidx.preference.Preference; 27 28 import com.android.settings.R; 29 import com.android.settings.core.PreferenceControllerMixin; 30 import com.android.settingslib.development.DeveloperOptionsPreferenceController; 31 32 public class FileEncryptionPreferenceController extends DeveloperOptionsPreferenceController 33 implements PreferenceControllerMixin { 34 35 private static final String KEY_CONVERT_FBE = "convert_to_file_encryption"; 36 private static final String KEY_STORAGE_MANAGER = "mount"; 37 38 private final IStorageManager mStorageManager; 39 FileEncryptionPreferenceController(Context context)40 public FileEncryptionPreferenceController(Context context) { 41 super(context); 42 43 mStorageManager = getStorageManager(); 44 } 45 46 @Override isAvailable()47 public boolean isAvailable() { 48 if (mStorageManager == null) { 49 return false; 50 } 51 52 try { 53 return mStorageManager.isConvertibleToFBE(); 54 } catch (RemoteException e) { 55 return false; 56 } 57 } 58 59 @Override getPreferenceKey()60 public String getPreferenceKey() { 61 return KEY_CONVERT_FBE; 62 } 63 64 @Override updateState(Preference preference)65 public void updateState(Preference preference) { 66 if (CryptoProperties.type().orElse(CryptoProperties.type_values.NONE) != 67 CryptoProperties.type_values.FILE) { 68 return; 69 } 70 71 mPreference.setEnabled(false); 72 mPreference.setSummary( 73 mContext.getResources().getString(R.string.convert_to_file_encryption_done)); 74 } 75 getStorageManager()76 private IStorageManager getStorageManager() { 77 try { 78 return IStorageManager.Stub.asInterface( 79 ServiceManager.getService(KEY_STORAGE_MANAGER)); 80 } catch (VerifyError e) { 81 // Used for tests since Robolectric cannot initialize this class. 82 return null; 83 } 84 } 85 }