package eu.siacs.conversations.xmpp.jingle; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; import java.net.UnknownHostException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Arrays; import eu.siacs.conversations.entities.DownloadableFile; import eu.siacs.conversations.utils.CryptoHelper; public class JingleSocks5Transport extends JingleTransport { private JingleCandidate candidate; private String destination; private OutputStream outputStream; private InputStream inputStream; private boolean isEstablished = false; private boolean activated = false; protected Socket socket; public JingleSocks5Transport(JingleConnection jingleConnection, JingleCandidate candidate) { this.candidate = candidate; try { MessageDigest mDigest = MessageDigest.getInstance("SHA-1"); StringBuilder destBuilder = new StringBuilder(); destBuilder.append(jingleConnection.getSessionId()); if (candidate.isOurs()) { destBuilder.append(jingleConnection.getAccountJid()); destBuilder.append(jingleConnection.getCounterPart()); } else { destBuilder.append(jingleConnection.getCounterPart()); destBuilder.append(jingleConnection.getAccountJid()); } mDigest.reset(); this.destination = CryptoHelper.bytesToHex(mDigest .digest(destBuilder.toString().getBytes())); } catch (NoSuchAlgorithmException e) { } } public void connect(final OnTransportConnected callback) { new Thread(new Runnable() { @Override public void run() { try { socket = new Socket(candidate.getHost(), candidate.getPort()); inputStream = socket.getInputStream(); outputStream = socket.getOutputStream(); byte[] login = { 0x05, 0x01, 0x00 }; byte[] expectedReply = { 0x05, 0x00 }; byte[] reply = new byte[2]; outputStream.write(login); inputStream.read(reply); final String connect = Character.toString('\u0005') + '\u0001' + '\u0000' + '\u0003' + '\u0028' + destination + '\u0000' + '\u0000'; if (Arrays.equals(reply, expectedReply)) { outputStream.write(connect.getBytes()); byte[] result = new byte[2]; inputStream.read(result); int status = result[1]; if (status == 0) { isEstablished = true; callback.established(); } else { callback.failed(); } } else { socket.close(); callback.failed(); } } catch (UnknownHostException e) { callback.failed(); } catch (IOException e) { callback.failed(); } } }).start(); } public void send(final DownloadableFile file, final OnFileTransmissionStatusChanged callback) { new Thread(new Runnable() { @Override public void run() { InputStream fileInputStream = null; try { MessageDigest digest = MessageDigest.getInstance("SHA-1"); digest.reset(); fileInputStream = file.createInputStream(); if (fileInputStream == null) { callback.onFileTransferAborted(); return; } int count; byte[] buffer = new byte[8192]; while ((count = fileInputStream.read(buffer)) > 0) { outputStream.write(buffer, 0, count); digest.update(buffer, 0, count); } outputStream.flush(); file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest())); if (callback != null) { callback.onFileTransmitted(file); } } catch (FileNotFoundException e) { callback.onFileTransferAborted(); } catch (IOException e) { callback.onFileTransferAborted(); } catch (NoSuchAlgorithmException e) { callback.onFileTransferAborted(); } finally { try { if (fileInputStream != null) { fileInputStream.close(); } } catch (IOException e) { callback.onFileTransferAborted(); } } } }).start(); } public void receive(final DownloadableFile file, final OnFileTransmissionStatusChanged callback) { new Thread(new Runnable() { @Override public void run() { try { MessageDigest digest = MessageDigest.getInstance("SHA-1"); digest.reset(); inputStream.skip(45); socket.setSoTimeout(30000); file.getParentFile().mkdirs(); file.createNewFile(); OutputStream fileOutputStream = file.createOutputStream(); if (fileOutputStream == null) { callback.onFileTransferAborted(); return; } long remainingSize = file.getExpectedSize(); byte[] buffer = new byte[8192]; int count = buffer.length; while (remainingSize > 0) { count = inputStream.read(buffer); if (count == -1) { callback.onFileTransferAborted(); return; } else { fileOutputStream.write(buffer, 0, count); digest.update(buffer, 0, count); remainingSize -= count; } } fileOutputStream.flush(); fileOutputStream.close(); file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest())); callback.onFileTransmitted(file); } catch (FileNotFoundException e) { callback.onFileTransferAborted(); } catch (IOException e) { callback.onFileTransferAborted(); } catch (NoSuchAlgorithmException e) { callback.onFileTransferAborted(); } } }).start(); } public boolean isProxy() { return this.candidate.getType() == JingleCandidate.TYPE_PROXY; } public boolean needsActivation() { return (this.isProxy() && !this.activated); } public void disconnect() { if (this.socket != null) { try { this.socket.close(); } catch (IOException e) { } } } public boolean isEstablished() { return this.isEstablished; } public JingleCandidate getCandidate() { return this.candidate; } public void setActivated(boolean activated) { this.activated = activated; } }