88 lines
2.6 KiB
Java
88 lines
2.6 KiB
Java
package eu.siacs.conversations.utils;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.nio.ByteBuffer;
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import eu.siacs.conversations.Config;
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public class SocksSocketFactory {
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private static final byte[] LOCALHOST = new byte[]{127,0,0,1};
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public static void createSocksConnection(final Socket socket, final String destination, final int port) throws IOException {
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final InputStream proxyIs = socket.getInputStream();
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final OutputStream proxyOs = socket.getOutputStream();
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proxyOs.write(new byte[]{0x05, 0x01, 0x00});
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proxyOs.flush();
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final byte[] handshake = new byte[2];
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proxyIs.read(handshake);
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if (handshake[0] != 0x05 || handshake[1] != 0x00) {
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throw new SocksConnectionException("Socks 5 handshake failed");
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}
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final byte[] dest = destination.getBytes();
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final ByteBuffer request = ByteBuffer.allocate(7 + dest.length);
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request.put(new byte[]{0x05, 0x01, 0x00, 0x03});
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request.put((byte) dest.length);
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request.put(dest);
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request.putShort((short) port);
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proxyOs.write(request.array());
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proxyOs.flush();
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final byte[] response = new byte[7 + dest.length];
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proxyIs.read(response);
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if (response[1] != 0x00) {
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if (response[1] == 0x04) {
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throw new HostNotFoundException("Host unreachable");
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}
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if (response[1] == 0x05) {
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throw new HostNotFoundException("Connection refused");
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}
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throw new SocksConnectionException("Unable to connect to destination "+(int) (response[1]));
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}
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}
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public static boolean contains(byte needle, byte[] haystack) {
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for(byte hay : haystack) {
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if (hay == needle) {
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return true;
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}
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}
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return false;
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}
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private static Socket createSocket(InetSocketAddress address, String destination, int port) throws IOException {
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Socket socket = new Socket();
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try {
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socket.connect(address, Config.CONNECT_TIMEOUT * 1000);
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} catch (IOException e) {
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throw new SocksProxyNotFoundException();
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}
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createSocksConnection(socket, destination, port);
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return socket;
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}
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public static Socket createSocketOverTor(String destination, int port) throws IOException {
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return createSocket(new InetSocketAddress(InetAddress.getByAddress(LOCALHOST), 9050), destination, port);
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}
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private static class SocksConnectionException extends IOException {
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SocksConnectionException(String message) {
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super(message);
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}
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}
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public static class SocksProxyNotFoundException extends IOException {
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}
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public static class HostNotFoundException extends SocksConnectionException {
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HostNotFoundException(String message) {
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super(message);
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}
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}
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}
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