| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.systemui.statusbar.phone; |
| |
| import android.content.Context; |
| |
| import com.android.internal.widget.LockPatternUtils; |
| import com.android.keyguard.KeyguardUpdateMonitor; |
| import com.android.keyguard.KeyguardUpdateMonitorCallback; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Caches whether the current unlock method is insecure, taking trust into account. This information |
| * might be a little bit out of date and should not be used for actual security decisions; it should |
| * be only used for visual indications. |
| */ |
| public class UnlockMethodCache { |
| |
| private static UnlockMethodCache sInstance; |
| |
| private final LockPatternUtils mLockPatternUtils; |
| private final KeyguardUpdateMonitor mKeyguardUpdateMonitor; |
| private final ArrayList<OnUnlockMethodChangedListener> mListeners = new ArrayList<>(); |
| private boolean mMethodInsecure; |
| private boolean mTrustManaged; |
| |
| private UnlockMethodCache(Context ctx) { |
| mLockPatternUtils = new LockPatternUtils(ctx); |
| mKeyguardUpdateMonitor = KeyguardUpdateMonitor.getInstance(ctx); |
| KeyguardUpdateMonitor.getInstance(ctx).registerCallback(mCallback); |
| updateMethodSecure(true /* updateAlways */); |
| } |
| |
| public static UnlockMethodCache getInstance(Context context) { |
| if (sInstance == null) { |
| sInstance = new UnlockMethodCache(context); |
| } |
| return sInstance; |
| } |
| |
| /** |
| * @return whether the current security method is secure, i. e. the bouncer will be shown |
| */ |
| public boolean isMethodInsecure() { |
| return mMethodInsecure; |
| } |
| |
| public void addListener(OnUnlockMethodChangedListener listener) { |
| mListeners.add(listener); |
| } |
| |
| public void removeListener(OnUnlockMethodChangedListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| private void updateMethodSecure(boolean updateAlways) { |
| int user = mLockPatternUtils.getCurrentUser(); |
| boolean methodInsecure = !mLockPatternUtils.isSecure() || |
| mKeyguardUpdateMonitor.getUserHasTrust(user); |
| boolean trustManaged = mKeyguardUpdateMonitor.getUserTrustIsManaged(user); |
| boolean changed = methodInsecure != mMethodInsecure || trustManaged != mTrustManaged; |
| if (changed || updateAlways) { |
| mMethodInsecure = methodInsecure; |
| mTrustManaged = trustManaged; |
| notifyListeners(mMethodInsecure); |
| } |
| } |
| |
| private void notifyListeners(boolean secure) { |
| for (OnUnlockMethodChangedListener listener : mListeners) { |
| listener.onMethodSecureChanged(secure); |
| } |
| } |
| |
| private final KeyguardUpdateMonitorCallback mCallback = new KeyguardUpdateMonitorCallback() { |
| @Override |
| public void onUserSwitchComplete(int userId) { |
| updateMethodSecure(false /* updateAlways */); |
| } |
| |
| @Override |
| public void onTrustChanged(int userId) { |
| updateMethodSecure(false /* updateAlways */); |
| } |
| |
| @Override |
| public void onTrustManagedChanged(int userId) { |
| updateMethodSecure(false /* updateAlways */); |
| } |
| |
| @Override |
| public void onScreenTurnedOn() { |
| updateMethodSecure(false /* updateAlways */); |
| } |
| |
| @Override |
| public void onFingerprintRecognized(int userId) { |
| updateMethodSecure(false /* updateAlways */); |
| } |
| }; |
| |
| public boolean isTrustManaged() { |
| return mTrustManaged; |
| } |
| |
| public static interface OnUnlockMethodChangedListener { |
| void onMethodSecureChanged(boolean methodSecure); |
| } |
| } |