| /* |
| * 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 com.android.server.os; |
| |
| import android.Manifest; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.IDeviceIdentifiersPolicyService; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import com.android.server.SystemService; |
| |
| /** |
| * This service defines the policy for accessing device identifiers. |
| */ |
| public final class DeviceIdentifiersPolicyService extends SystemService { |
| public DeviceIdentifiersPolicyService(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.DEVICE_IDENTIFIERS_SERVICE, |
| new DeviceIdentifiersPolicy(getContext())); |
| } |
| |
| private static final class DeviceIdentifiersPolicy |
| extends IDeviceIdentifiersPolicyService.Stub { |
| private final @NonNull Context mContext; |
| |
| public DeviceIdentifiersPolicy(Context context) { |
| mContext = context; |
| } |
| |
| @Override |
| public @Nullable String getSerial() throws RemoteException { |
| if (UserHandle.getAppId(Binder.getCallingUid()) != Process.SYSTEM_UID |
| && mContext.checkCallingOrSelfPermission( |
| Manifest.permission.READ_PHONE_STATE) |
| != PackageManager.PERMISSION_GRANTED |
| && mContext.checkCallingOrSelfPermission( |
| Manifest.permission.READ_PRIVILEGED_PHONE_STATE) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("getSerial requires READ_PHONE_STATE" |
| + " or READ_PRIVILEGED_PHONE_STATE permission"); |
| } |
| return SystemProperties.get("ro.serialno", Build.UNKNOWN); |
| } |
| } |
| } |