1 /* 2 * Copyright (C) 2018 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.car.settings.security; 18 19 import android.annotation.WorkerThread; 20 import android.os.AsyncTask; 21 import android.os.Bundle; 22 23 import androidx.annotation.VisibleForTesting; 24 import androidx.fragment.app.Fragment; 25 26 import com.android.car.settings.common.Logger; 27 import com.android.internal.widget.LockPatternUtils; 28 import com.android.internal.widget.LockscreenCredential; 29 30 /** 31 * An invisible retained worker fragment to track the AsyncWork that saves 32 * the chosen lock credential (pattern/pin/password). 33 */ 34 public class SaveLockWorker extends Fragment { 35 /** 36 * Callback when lock save has finished 37 */ 38 interface Listener { onChosenLockSaveFinished(boolean isSaveSuccessful)39 void onChosenLockSaveFinished(boolean isSaveSuccessful); 40 } 41 42 private static final Logger LOG = new Logger(SaveLockWorker.class); 43 44 private Listener mListener; 45 private boolean mFinished; 46 private boolean mIsSaveSuccessful; 47 private LockPatternUtils mUtils; 48 private int mUserId; 49 50 private LockscreenCredential mEnteredCredential; 51 private LockscreenCredential mCurrentCredential; 52 private int mRequestedQuality; 53 getUtils()54 final LockPatternUtils getUtils() { 55 return mUtils; 56 } 57 getUserId()58 final int getUserId() { 59 return mUserId; 60 } 61 isFinished()62 final boolean isFinished() { 63 return mFinished; 64 } 65 66 @Override onCreate(Bundle savedInstanceState)67 public void onCreate(Bundle savedInstanceState) { 68 super.onCreate(savedInstanceState); 69 setRetainInstance(true); 70 } 71 init(int userId)72 final void init(int userId) { 73 mUtils = new LockPatternUtils(getContext()); 74 mUserId = userId; 75 } 76 start(int userId, LockscreenCredential enteredCredential, LockscreenCredential currentCredential)77 void start(int userId, LockscreenCredential enteredCredential, 78 LockscreenCredential currentCredential) { 79 init(userId); 80 mEnteredCredential = enteredCredential; 81 mCurrentCredential = currentCredential != null ? currentCredential 82 : LockscreenCredential.createNone(); 83 start(); 84 } 85 /** 86 * Start executing the async task. 87 */ start()88 private void start() { 89 mFinished = false; 90 new Task().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); 91 } 92 93 /** 94 * Set the listener to get callback when finished saving the chosen lock. 95 */ setListener(Listener listener)96 public void setListener(Listener listener) { 97 if (mListener != listener) { 98 mListener = listener; 99 if (mFinished && mListener != null) { 100 mListener.onChosenLockSaveFinished(mIsSaveSuccessful); 101 } 102 } 103 } 104 105 @VisibleForTesting saveAndVerifyInBackground(Void... params)106 boolean saveAndVerifyInBackground(Void... params) { 107 boolean isSaveSuccessful = true; 108 109 try { 110 saveLock(); 111 } catch (Exception e) { 112 LOG.e("Save lock exception", e); 113 isSaveSuccessful = false; 114 } 115 116 return isSaveSuccessful; 117 } 118 finish(boolean isSaveSuccessful)119 private void finish(boolean isSaveSuccessful) { 120 mFinished = true; 121 mIsSaveSuccessful = isSaveSuccessful; 122 if (mListener != null) { 123 mListener.onChosenLockSaveFinished(isSaveSuccessful); 124 } 125 } 126 127 /** 128 * Executes the save and verify work in background. 129 */ 130 @WorkerThread saveLock()131 void saveLock() { 132 final int userId = getUserId(); 133 134 // If called after setLockCredential, this will always be true 135 boolean isPatternEverChosen = getUtils().isPatternEverChosen(userId); 136 137 getUtils().setLockCredential(mEnteredCredential, mCurrentCredential, userId); 138 139 if (mEnteredCredential.isPattern() && !isPatternEverChosen) { 140 getUtils().setVisiblePatternEnabled(true, userId); 141 } 142 } 143 144 // Save chosen lock task. 145 private class Task extends AsyncTask<Void, Void, Boolean> { 146 @Override doInBackground(Void... params)147 protected Boolean doInBackground(Void... params) { 148 return saveAndVerifyInBackground(); 149 } 150 151 @Override onPostExecute(Boolean isSaveSuccessful)152 protected void onPostExecute(Boolean isSaveSuccessful) { 153 finish(isSaveSuccessful); 154 } 155 } 156 } 157