| /* |
| * Copyright (C) 2019 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.backup.encryption.transport; |
| |
| import static com.android.server.backup.encryption.BackupEncryptionService.TAG; |
| |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.backup.IBackupTransport; |
| import com.android.server.backup.transport.DelegatingTransport; |
| import com.android.server.backup.transport.TransportClient; |
| |
| /** |
| * This is an implementation of {@link IBackupTransport} that encrypts (or decrypts) the data when |
| * sending it (or receiving it) from the {@link IBackupTransport} returned by {@link |
| * TransportClient.connect(String)}. |
| */ |
| public class IntermediateEncryptingTransport extends DelegatingTransport { |
| private final TransportClient mTransportClient; |
| private final Object mConnectLock = new Object(); |
| private volatile IBackupTransport mRealTransport; |
| |
| @VisibleForTesting |
| IntermediateEncryptingTransport(TransportClient transportClient) { |
| mTransportClient = transportClient; |
| } |
| |
| @Override |
| protected IBackupTransport getDelegate() throws RemoteException { |
| if (mRealTransport == null) { |
| connect(); |
| } |
| return mRealTransport; |
| } |
| |
| private void connect() throws RemoteException { |
| Log.i(TAG, "connecting " + mTransportClient); |
| synchronized (mConnectLock) { |
| if (mRealTransport == null) { |
| mRealTransport = mTransportClient.connect("IntermediateEncryptingTransport"); |
| if (mRealTransport == null) { |
| throw new RemoteException("Could not connect: " + mTransportClient); |
| } |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| TransportClient getClient() { |
| return mTransportClient; |
| } |
| } |