| /* |
| * 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.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.os.Build; |
| import android.os.IDeviceIdentifiersPolicyService; |
| import android.os.RemoteException; |
| import android.os.SystemProperties; |
| |
| import com.android.internal.telephony.TelephonyPermissions; |
| 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 { |
| // Since this invocation is on the server side a null value is used for the |
| // callingPackage as the server's package name (typically android) should not be used |
| // for any device / profile owner checks. The majority of requests for the serial number |
| // should use the getSerialForPackage method with the calling package specified. |
| if (!TelephonyPermissions.checkCallingOrSelfReadDeviceIdentifiers(mContext, |
| /* callingPackage */ null, null, "getSerial")) { |
| return Build.UNKNOWN; |
| } |
| return SystemProperties.get("ro.serialno", Build.UNKNOWN); |
| } |
| |
| @Override |
| public @Nullable String getSerialForPackage(String callingPackage, |
| String callingFeatureId) throws RemoteException { |
| if (!TelephonyPermissions.checkCallingOrSelfReadDeviceIdentifiers(mContext, |
| callingPackage, callingFeatureId, "getSerial")) { |
| return Build.UNKNOWN; |
| } |
| return SystemProperties.get("ro.serialno", Build.UNKNOWN); |
| } |
| } |
| } |