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/**
* Copyright (C) 2014 Open Whisper Systems
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package org.whispersystems.textsecure.api;
import org.whispersystems.libaxolotl.InvalidMessageException;
import org.whispersystems.textsecure.api.crypto.AttachmentCipherInputStream;
import org.whispersystems.textsecure.api.messages.TextSecureAttachment;
import org.whispersystems.textsecure.api.messages.TextSecureAttachment.ProgressListener;
import org.whispersystems.textsecure.api.messages.TextSecureAttachmentPointer;
import org.whispersystems.textsecure.api.messages.TextSecureDataMessage;
import org.whispersystems.textsecure.api.messages.TextSecureEnvelope;
import org.whispersystems.textsecure.api.push.TrustStore;
import org.whispersystems.textsecure.api.util.CredentialsProvider;
import org.whispersystems.textsecure.internal.push.PushServiceSocket;
import org.whispersystems.textsecure.internal.push.TextSecureEnvelopeEntity;
import org.whispersystems.textsecure.internal.util.StaticCredentialsProvider;
import org.whispersystems.textsecure.internal.websocket.WebSocketConnection;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedList;
import java.util.List;
/**
* The primary interface for receiving TextSecure messages.
*
* @author Moxie Marlinspike
*/
public class TextSecureMessageReceiver {
private final PushServiceSocket socket;
private final TrustStore trustStore;
private final String url;
private final CredentialsProvider credentialsProvider;
private final String userAgent;
/**
* Construct a TextSecureMessageReceiver.
*
* @param url The URL of the TextSecure server.
* @param trustStore The {@link org.whispersystems.textsecure.api.push.TrustStore} containing
* the server's TLS signing certificate.
* @param user The TextSecure user's username (eg. phone number).
* @param password The TextSecure user's password.
* @param signalingKey The 52 byte signaling key assigned to this user at registration.
*/
public TextSecureMessageReceiver(String url, TrustStore trustStore,
String user, String password,
String signalingKey, String userAgent)
{
this(url, trustStore, new StaticCredentialsProvider(user, password, signalingKey), userAgent);
}
/**
* Construct a TextSecureMessageReceiver.
*
* @param url The URL of the TextSecure server.
* @param trustStore The {@link org.whispersystems.textsecure.api.push.TrustStore} containing
* the server's TLS signing certificate.
* @param credentials The TextSecure user's credentials.
*/
public TextSecureMessageReceiver(String url, TrustStore trustStore,
CredentialsProvider credentials, String userAgent)
{
this.url = url;
this.trustStore = trustStore;
this.credentialsProvider = credentials;
this.socket = new PushServiceSocket(url, trustStore, credentials, userAgent);
this.userAgent = userAgent;
}
/**
* Retrieves a TextSecure attachment.
*
* @param pointer The {@link org.whispersystems.textsecure.api.messages.TextSecureAttachmentPointer}
* received in a {@link TextSecureDataMessage}.
* @param destination The download destination for this attachment.
*
* @return An InputStream that streams the plaintext attachment contents.
* @throws IOException
* @throws InvalidMessageException
*/
public InputStream retrieveAttachment(TextSecureAttachmentPointer pointer, File destination)
throws IOException, InvalidMessageException
{
return retrieveAttachment(pointer, destination, null);
}
/**
* Retrieves a TextSecure attachment.
*
* @param pointer The {@link org.whispersystems.textsecure.api.messages.TextSecureAttachmentPointer}
* received in a {@link TextSecureDataMessage}.
* @param destination The download destination for this attachment.
* @param listener An optional listener (may be null) to receive callbacks on download progress.
*
* @return An InputStream that streams the plaintext attachment contents.
* @throws IOException
* @throws InvalidMessageException
*/
public InputStream retrieveAttachment(TextSecureAttachmentPointer pointer, File destination, ProgressListener listener)
throws IOException, InvalidMessageException
{
socket.retrieveAttachment(pointer.getRelay().orNull(), pointer.getId(), destination, listener);
return new AttachmentCipherInputStream(destination, pointer.getKey());
}
/**
* Creates a pipe for receiving TextSecure messages.
*
* Callers must call {@link TextSecureMessagePipe#shutdown()} when finished with the pipe.
*
* @return A TextSecureMessagePipe for receiving TextSecure messages.
*/
public TextSecureMessagePipe createMessagePipe() {
WebSocketConnection webSocket = new WebSocketConnection(url, trustStore, credentialsProvider, userAgent);
return new TextSecureMessagePipe(webSocket, credentialsProvider);
}
public List retrieveMessages() throws IOException {
return retrieveMessages(new NullMessageReceivedCallback());
}
public List retrieveMessages(MessageReceivedCallback callback)
throws IOException
{
List results = new LinkedList<>();
List entities = socket.getMessages();
for (TextSecureEnvelopeEntity entity : entities) {
TextSecureEnvelope envelope = new TextSecureEnvelope(entity.getType(), entity.getSource(),
entity.getSourceDevice(), entity.getRelay(),
entity.getTimestamp(), entity.getMessage(),
entity.getContent());
callback.onMessage(envelope);
results.add(envelope);
socket.acknowledgeMessage(entity.getSource(), entity.getTimestamp());
}
return results;
}
public interface MessageReceivedCallback {
public void onMessage(TextSecureEnvelope envelope);
}
public static class NullMessageReceivedCallback implements MessageReceivedCallback {
@Override
public void onMessage(TextSecureEnvelope envelope) {}
}
}
