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SocksLib

SocksLib is a Java library for SOCKS5 protocol.

See Java API Documentation

See Wiki Page (Chinese)

If you are looking for a SOCKS5 server instead of a SOKCS5 library, I hope Esocks can help you.

References

• SOCKS Protocol Version 5
• Username/Password Authentication for SOCKS V5

Features

Client

• TCP proxy
• UDP proxy
• Bind
• Anonymous authentication
• USERNAME/PASSWORD authentication
• Proxy chain

Server

• TCP proxy
• UDP proxy
• Bind
• Anonymous authentication
• USERNAME/PASSWORD authentication
• Proxy chain
• Black or white IP lists for clients

Quick start

Environment

• JDK 8+

Dependencies

You should put following libraries in your project's CLASSPATH:

• log4j-slf4j-impl-2.4.jar
• slf4j-api-1.7.12.jar
• log4j-api-2.4.jar
• log4j-core-2.4.jar
• guava-18.0.jar

SOCKS5 Client

CONNECT

    SocksProxy proxy = new Socks5(new InetSocketAddress("localhost",1080));
    Socket socket = new SocksSocket(proxy, new InetSocketAddress("whois.internic.net",43));

Connect SOCKS5 server using SSL connection

    SSLConfigurationBuilder builder = SSLConfigurationBuilder.newBuilder();
    builder.setTrustKeyStorePath("client-trust-keystore.jks");
    builder.setTrustKeyStorePassword("123456");
    SocksProxy proxy = new SSLSocks5(new InetSocketAddress("localhost", 1081), builder.build());
    Socket socket = new SocksSocket(proxy, new InetSocketAddress("whois.internic.net",43));

BIND

    SocksServerSocket serverSocket = new SocksServerSocket(proxy, inetAddress,8080);
    InetAddress bindAddress = serverSocket.getBindAddress();
    int bindPort  = serverSocket.getBindPort();
    Socket socket = serverSocket.accept();

UDP ASSOCIATE

     DatagramSocket socket = new Socks5DatagramSocket(proxy);

SOCKS5 Server

     SocksProxyServer proxyServer = SocksServerBuilder.buildAnonymousSocks5Server(); 
     proxyServer.start();// Creat a SOCKS5 server bind at port 1080

SSL socks server

    SSLConfigurationBuilder builder = SSLConfigurationBuilder.newBuilder();
    builder.setKeyStorePath("server-keystore.jks");
    builder.setKeyStorePassword("123456");
    builder.setClientAuth(false);
    socksProxyServer = SocksServerBuilder.buildAnonymousSSLSocks5Server(1081, builder.build());
    socksProxyServer.start();