| /* |
| * Copyright (C) 2016 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 android.security.cts; |
| |
| import android.app.Service; |
| import android.content.Intent; |
| import android.os.IBinder; |
| import android.util.Log; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class IsolatedService extends Service { |
| |
| private static final String TAG = IsolatedService.class.getSimpleName(); |
| private static final String SERVICE_MANAGER_CLASS_NAME = "android.os.ServiceManager"; |
| private static final String SERVICE_MANAGER_INTERNAL_CACHE_NAME = "sCache"; |
| private static final String GET_SERVICE_METHOD_NAME = "getService"; |
| |
| private String[] getServicesCachedInServiceManager() { |
| ArrayList<String> cachedServices = new ArrayList<String>(); |
| try { |
| Class<?> serviceManager = Class.forName(SERVICE_MANAGER_CLASS_NAME); |
| Field cacheField = serviceManager.getDeclaredField(SERVICE_MANAGER_INTERNAL_CACHE_NAME); |
| cacheField.setAccessible(true); |
| HashMap<String, IBinder> sCache = (HashMap<String, IBinder>) cacheField.get(null); |
| for (Map.Entry<String, IBinder> serviceEntry : sCache.entrySet()) { |
| if (serviceEntry.getValue() != null) { |
| cachedServices.add(serviceEntry.getKey()); |
| } |
| } |
| } catch (ClassCastException | ReflectiveOperationException exc) { |
| Log.w(TAG, "Unable to retrieve service manager cache via reflection ", exc); |
| } |
| return cachedServices.toArray(new String[cachedServices.size()]); |
| } |
| |
| private IBinder getServiceFromServiceManager(String serviceName) { |
| try { |
| Class<?> serviceManager = Class.forName(SERVICE_MANAGER_CLASS_NAME); |
| Method getServiceMethod = |
| serviceManager.getDeclaredMethod(GET_SERVICE_METHOD_NAME, String.class); |
| IBinder service = (IBinder) getServiceMethod.invoke(null, serviceName); |
| return service; |
| } catch (ClassCastException | ReflectiveOperationException exc) { |
| Log.w(TAG, "Unable to call ServiceManager.getService() ", exc); |
| } |
| return null; |
| } |
| |
| private final IIsolatedService.Stub mBinder = new IIsolatedService.Stub() { |
| |
| public String[] getCachedSystemServices() { |
| return getServicesCachedInServiceManager(); |
| } |
| |
| public IBinder getSystemService(String serviceName) { |
| return getServiceFromServiceManager(serviceName); |
| } |
| }; |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| return mBinder; |
| } |
| } |