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.os.Bundle; 20 import android.support.v4.app.Fragment; 21 22 import com.android.car.settings.common.Logger; 23 import com.android.internal.widget.LockPatternChecker; 24 import com.android.internal.widget.LockPatternUtils; 25 import com.android.internal.widget.LockPatternView; 26 27 import java.util.List; 28 29 /** 30 * An invisible retained worker fragment to track the AsyncTask that checks the entered lock 31 * credential (pattern/pin/password). 32 */ 33 public class CheckLockWorker extends Fragment implements LockPatternChecker.OnCheckCallback { 34 35 private static final Logger LOG = new Logger(CheckLockWorker.class); 36 37 private boolean mHasPendingResult; 38 private boolean mLockMatched; 39 private boolean mCheckInProgress; 40 private Listener mListener; 41 private LockPatternUtils mLockPatternUtils; 42 43 @Override onCreate(Bundle savedInstanceState)44 public void onCreate(Bundle savedInstanceState) { 45 super.onCreate(savedInstanceState); 46 setRetainInstance(true); 47 mLockPatternUtils = new LockPatternUtils(getContext()); 48 } 49 50 @Override onChecked(boolean matched, int throttleTimeoutMs)51 public void onChecked(boolean matched, int throttleTimeoutMs) { 52 mCheckInProgress = false; 53 54 if (mListener == null) { 55 mHasPendingResult = true; 56 mLockMatched = matched; 57 } else { 58 mListener.onCheckCompleted(matched); 59 } 60 } 61 62 /** 63 * Sets the listener for callback when lock check is completed. 64 */ setListener(Listener listener)65 public void setListener(Listener listener) { 66 mListener = listener; 67 if (mListener != null && mHasPendingResult) { 68 mHasPendingResult = false; 69 mListener.onCheckCompleted(mLockMatched); 70 } 71 } 72 73 /** Returns whether a lock check is in progress. */ isCheckInProgress()74 public final boolean isCheckInProgress() { 75 return mCheckInProgress; 76 } 77 78 /** 79 * Checks lock pattern asynchronously. To receive callback when check is completed, 80 * implement {@link Listener} and call {@link #setListener(Listener)}. 81 */ checkPattern(int userId, List<LockPatternView.Cell> pattern)82 public final void checkPattern(int userId, List<LockPatternView.Cell> pattern) { 83 if (mCheckInProgress) { 84 LOG.w("Check pattern request issued while one is still running"); 85 return; 86 } 87 88 mCheckInProgress = true; 89 LockPatternChecker.checkPattern(mLockPatternUtils, pattern, userId, this); 90 } 91 92 /** 93 * Checks lock PIN/password asynchronously. To receive callback when check is completed, 94 * implement {@link Listener} and call {@link #setListener(Listener)}. 95 */ checkPinPassword(int userId, String password)96 public final void checkPinPassword(int userId, String password) { 97 if (mCheckInProgress) { 98 LOG.w("Check pin/password request issued while one is still running"); 99 return; 100 } 101 mCheckInProgress = true; 102 LockPatternChecker.checkPassword(mLockPatternUtils, password, userId, this); 103 } 104 105 /** 106 * Callback when lock check is completed. 107 */ 108 interface Listener { 109 /** 110 * @param matched Whether the entered password matches the stored record. 111 */ onCheckCompleted(boolean matched)112 void onCheckCompleted(boolean matched); 113 } 114 } 115 116