| /* |
| * Copyright (C) 2013 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.server.policy.keyguard; |
| |
| import android.app.ActivityManager; |
| import android.content.Context; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.security.IKeystoreService; |
| import android.util.Slog; |
| |
| import com.android.internal.policy.IKeyguardService; |
| import com.android.internal.policy.IKeyguardStateCallback; |
| import com.android.internal.widget.LockPatternUtils; |
| |
| import java.io.PrintWriter; |
| |
| /** |
| * Maintains a cached copy of Keyguard's state. |
| * @hide |
| */ |
| public class KeyguardStateMonitor extends IKeyguardStateCallback.Stub { |
| private static final String TAG = "KeyguardStateMonitor"; |
| |
| // These cache the current state of Keyguard to improve performance and avoid deadlock. After |
| // Keyguard changes its state, it always triggers a layout in window manager. Because |
| // IKeyguardStateCallback is synchronous and because these states are declared volatile, it's |
| // guaranteed that window manager picks up the new state all the time in the layout caused by |
| // the state change of Keyguard. To be extra safe, assume most restrictive values until Keyguard |
| // tells us the actual value. |
| private volatile boolean mIsShowing = true; |
| private volatile boolean mSimSecure = true; |
| private volatile boolean mInputRestricted = true; |
| private volatile boolean mTrusted = false; |
| private volatile boolean mHasLockscreenWallpaper = false; |
| |
| private int mCurrentUserId; |
| |
| private final LockPatternUtils mLockPatternUtils; |
| private final StateCallback mCallback; |
| |
| IKeystoreService mKeystoreService; |
| |
| public KeyguardStateMonitor(Context context, IKeyguardService service, StateCallback callback) { |
| mLockPatternUtils = new LockPatternUtils(context); |
| mCurrentUserId = ActivityManager.getCurrentUser(); |
| mCallback = callback; |
| |
| mKeystoreService = IKeystoreService.Stub.asInterface(ServiceManager |
| .getService("android.security.keystore")); |
| |
| try { |
| service.addStateMonitorCallback(this); |
| } catch (RemoteException e) { |
| Slog.w(TAG, "Remote Exception", e); |
| } |
| } |
| |
| public boolean isShowing() { |
| return mIsShowing; |
| } |
| |
| public boolean isSecure(int userId) { |
| return mLockPatternUtils.isSecure(userId) || mSimSecure; |
| } |
| |
| public boolean isInputRestricted() { |
| return mInputRestricted; |
| } |
| |
| public boolean isTrusted() { |
| return mTrusted; |
| } |
| |
| public boolean hasLockscreenWallpaper() { |
| return mHasLockscreenWallpaper; |
| } |
| |
| @Override // Binder interface |
| public void onShowingStateChanged(boolean showing) { |
| mIsShowing = showing; |
| |
| if (showing) try { |
| mKeystoreService.lock(mCurrentUserId); // as long as this doesn't recur... |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Error locking keystore", e); |
| } |
| } |
| |
| @Override // Binder interface |
| public void onSimSecureStateChanged(boolean simSecure) { |
| mSimSecure = simSecure; |
| } |
| |
| public synchronized void setCurrentUser(int userId) { |
| mCurrentUserId = userId; |
| } |
| |
| private synchronized int getCurrentUser() { |
| return mCurrentUserId; |
| } |
| |
| @Override // Binder interface |
| public void onInputRestrictedStateChanged(boolean inputRestricted) { |
| mInputRestricted = inputRestricted; |
| } |
| |
| @Override // Binder interface |
| public void onTrustedChanged(boolean trusted) { |
| mTrusted = trusted; |
| mCallback.onTrustedChanged(); |
| } |
| |
| @Override // Binder interface |
| public void onHasLockscreenWallpaperChanged(boolean hasLockscreenWallpaper) { |
| mHasLockscreenWallpaper = hasLockscreenWallpaper; |
| } |
| |
| public interface StateCallback { |
| void onTrustedChanged(); |
| } |
| |
| public void dump(String prefix, PrintWriter pw) { |
| pw.println(prefix + TAG); |
| prefix += " "; |
| pw.println(prefix + "mIsShowing=" + mIsShowing); |
| pw.println(prefix + "mSimSecure=" + mSimSecure); |
| pw.println(prefix + "mInputRestricted=" + mInputRestricted); |
| pw.println(prefix + "mTrusted=" + mTrusted); |
| pw.println(prefix + "mCurrentUserId=" + mCurrentUserId); |
| } |
| } |