KeyguardService.java revision 96afb6f03b87359c3bcb96c2bdb8aadc7b1c3c37 
1/*
2 * Copyright (C) 2014 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
17package com.android.systemui.keyguard;
18
19import android.app.Service;
20import android.content.Intent;
21import android.os.Binder;
22import android.os.Bundle;
23import android.os.Debug;
24import android.os.IBinder;
25import android.os.Process;
26import android.util.Log;
27import android.view.MotionEvent;
28
29import com.android.internal.policy.IKeyguardExitCallback;
30import com.android.internal.policy.IKeyguardService;
31import com.android.internal.policy.IKeyguardServiceConstants;
32import com.android.internal.policy.IKeyguardShowCallback;
33import com.android.systemui.SystemUIApplication;
34
35import static android.content.pm.PackageManager.PERMISSION_GRANTED;
36
37public class KeyguardService extends Service {
38    static final String TAG = "KeyguardService";
39    static final String PERMISSION = android.Manifest.permission.CONTROL_KEYGUARD;
40
41    private KeyguardViewMediator mKeyguardViewMediator;
42
43    @Override
44    public void onCreate() {
45        ((SystemUIApplication) getApplication()).startServicesIfNeeded();
46        mKeyguardViewMediator =
47                ((SystemUIApplication) getApplication()).getComponent(KeyguardViewMediator.class);
48    }
49
50    @Override
51    public IBinder onBind(Intent intent) {
52        return mBinder;
53    }
54
55    void checkPermission() {
56        // Avoid deadlock by avoiding calling back into the system process.
57        if (Binder.getCallingUid() == Process.SYSTEM_UID) return;
58
59        // Otherwise,explicitly check for caller permission ...
60        if (getBaseContext().checkCallingOrSelfPermission(PERMISSION) != PERMISSION_GRANTED) {
61            Log.w(TAG, "Caller needs permission '" + PERMISSION + "' to call " + Debug.getCaller());
62            throw new SecurityException("Access denied to process: " + Binder.getCallingPid()
63                    + ", must have permission " + PERMISSION);
64        }
65    }
66
67    private final IKeyguardService.Stub mBinder = new IKeyguardService.Stub() {
68
69        private boolean mIsOccluded;
70
71        @Override
72        public boolean isShowing() {
73            return mKeyguardViewMediator.isShowing();
74        }
75
76        @Override
77        public boolean isSecure() {
78            return mKeyguardViewMediator.isSecure();
79        }
80
81        @Override
82        public boolean isShowingAndNotOccluded() {
83            return mKeyguardViewMediator.isShowingAndNotOccluded();
84        }
85
86        @Override
87        public boolean isInputRestricted() {
88            return mKeyguardViewMediator.isInputRestricted();
89        }
90
91        @Override
92        public void verifyUnlock(IKeyguardExitCallback callback) {
93            checkPermission();
94            mKeyguardViewMediator.verifyUnlock(callback);
95        }
96
97        @Override
98        public void keyguardDone(boolean authenticated, boolean wakeup) {
99            checkPermission();
100            mKeyguardViewMediator.keyguardDone(authenticated, wakeup);
101        }
102
103        @Override
104        public int setOccluded(boolean isOccluded) {
105            checkPermission();
106            synchronized (this) {
107                int result;
108                if (isOccluded && mKeyguardViewMediator.isShowing()
109                        && !mIsOccluded) {
110                    result = IKeyguardServiceConstants
111                            .KEYGUARD_SERVICE_SET_OCCLUDED_RESULT_UNSET_FLAGS;
112                } else if (!isOccluded && mKeyguardViewMediator.isShowing()
113                        && mIsOccluded) {
114                    result = IKeyguardServiceConstants
115                            .KEYGUARD_SERVICE_SET_OCCLUDED_RESULT_SET_FLAGS;
116                } else {
117                    result = IKeyguardServiceConstants.KEYGUARD_SERVICE_SET_OCCLUDED_RESULT_NONE;
118                }
119                if (mIsOccluded != isOccluded) {
120                    mKeyguardViewMediator.setOccluded(isOccluded);
121
122                    // Cache the value so we always have a fresh view in whether Keyguard is occluded.
123                    // If we would just call mKeyguardViewMediator.isOccluded(), this might be stale
124                    // because that value gets updated in another thread.
125                    mIsOccluded = isOccluded;
126                }
127                return result;
128            }
129        }
130
131        @Override
132        public void dismiss() {
133            checkPermission();
134            mKeyguardViewMediator.dismiss();
135        }
136
137        @Override
138        public void onDreamingStarted() {
139            checkPermission();
140            mKeyguardViewMediator.onDreamingStarted();
141        }
142
143        @Override
144        public void onDreamingStopped() {
145            checkPermission();
146            mKeyguardViewMediator.onDreamingStopped();
147        }
148
149        @Override
150        public void onScreenTurnedOff(int reason) {
151            checkPermission();
152            mKeyguardViewMediator.onScreenTurnedOff(reason);
153        }
154
155        @Override
156        public void onScreenTurnedOn(IKeyguardShowCallback callback) {
157            checkPermission();
158            mKeyguardViewMediator.onScreenTurnedOn(callback);
159        }
160
161        @Override
162        public void setKeyguardEnabled(boolean enabled) {
163            checkPermission();
164            mKeyguardViewMediator.setKeyguardEnabled(enabled);
165        }
166
167        @Override
168        public boolean isDismissable() {
169            return mKeyguardViewMediator.isDismissable();
170        }
171
172        @Override
173        public void onSystemReady() {
174            checkPermission();
175            mKeyguardViewMediator.onSystemReady();
176        }
177
178        @Override
179        public void doKeyguardTimeout(Bundle options) {
180            checkPermission();
181            mKeyguardViewMediator.doKeyguardTimeout(options);
182        }
183
184        @Override
185        public void setCurrentUser(int userId) {
186            checkPermission();
187            mKeyguardViewMediator.setCurrentUser(userId);
188        }
189
190        @Override
191        public void showAssistant() {
192            checkPermission();
193        }
194
195        @Override
196        public void dispatch(MotionEvent event) {
197            checkPermission();
198        }
199
200        @Override
201        public void launchCamera() {
202            checkPermission();
203        }
204
205        @Override
206        public void onBootCompleted() {
207            checkPermission();
208            mKeyguardViewMediator.onBootCompleted();
209        }
210
211        @Override
212        public void startKeyguardExitAnimation(long startTime, long fadeoutDuration) {
213            checkPermission();
214            mKeyguardViewMediator.startKeyguardExitAnimation(startTime, fadeoutDuration);
215        }
216
217        @Override
218        public void onActivityDrawn() {
219            checkPermission();
220            mKeyguardViewMediator.onActivityDrawn();
221        }
222    };
223}
224
225