simpleclient.java

JavaSSL编程代码及介绍。

import java.io.*;
import java.net.*;
import java.security.KeyStore;
import java.security.*;
import javax.net.*;
import javax.net.ssl.*;
import javax.security.cert.X509Certificate;


public class SimpleClient {

	private static SecureRandom secureRandom;
	private static KeyStore serverKeyStore, clientKeyStore;
	private static TrustManagerFactory tmf;
	private static KeyManagerFactory kmf;
	private static SSLContext sslContext;
	private static SSLSocketFactory sf;
	private static SSLSocket s;
	private static final int port = 5566;
	private static String host = "server1";
	private static String passphrase = "password";

	public static void main(String[] args)throws IOException
	{
		System.out.println("Beigin Client ...");

		try {
			System.out.println("connecting...");

			SimpleClient.SRandom();
			SimpleClient.SetupClientKeyStore();
			SimpleClient.SetupServerKeyStore();
			SimpleClient.TManagerFactory();
			SimpleClient.KManagerFactory();
			SimpleClient.SContext();
			SSLSocket c = SimpleClient.SCFactory();

			System.out.println("handshaking...");
			c.startHandshake();

			BufferedReader in =	new BufferedReader(
				new InputStreamReader(c.getInputStream()));
			PrintWriter out = new PrintWriter(
				new BufferedWriter(
				new OutputStreamWriter(
				c.getOutputStream())));
			BufferedReader stdin =	new BufferedReader(
				new InputStreamReader(System.in));

			String line;
			String strin;
			for(;;)
			{
				System.out.print("Enter a line:");
				strin = stdin.readLine();  
				if (strin.length() == 0) break;
				out.println (strin);
				out.flush();
				line = in.readLine();
				System.out.println("Msg from Server is: " + line);
			}

			in.close();
			out.close();
			c.close();

			System.out.println("done...");
		}catch (IOException e){
			System.out.println("SimpleClient died: " + e.getMessage());
			e.printStackTrace();
		}
	}

//-------------------SRandom------------------------------------------
	private static void SRandom() throws IOException{
		secureRandom = new SecureRandom();
		secureRandom.nextInt();	
	}
//--------------------SetupServerKeyStore--------------------------------------------
	private static void SetupServerKeyStore() throws IOException {
		try{
			serverKeyStore = KeyStore.getInstance( "JKS" );
			serverKeyStore.load( new FileInputStream( "server.public" ), passphrase.toCharArray() );
		}catch(Exception e){
			System.out.println("SetupServerKeyStore ERROR ...");
		}
	}
//-------------------------------------------------------------------
	private static void SetupClientKeyStore() throws IOException {
		try{
			clientKeyStore = KeyStore.getInstance( "JKS" );
			clientKeyStore.load( new FileInputStream( "client.private" ), passphrase.toCharArray() );
		}catch(Exception e){
			System.out.println("SetupClientKeyStore Error ...");
		}
	}
//-----------------------------------------------------------
	private static void TManagerFactory() throws IOException {
		try{
			tmf = TrustManagerFactory.getInstance( "SunX509" );
			tmf.init( serverKeyStore );
		}catch(Exception e){
			System.out.println("TManagerFactory ERROR ...");
		}
	}
//------------------------------------------------------------
	private static void KManagerFactory() throws IOException {
		try{
			kmf = KeyManagerFactory.getInstance( "SunX509" );
			kmf.init( clientKeyStore, passphrase.toCharArray() );
		}catch(Exception e){
			System.out.println("KMagagerFactory ERROR ...");
			System.out.println("KM" + e);
		}
	}
//-----------------------------------------------------------
	private static void SContext() throws IOException {
		try{
			sslContext = SSLContext.getInstance( "TLS" );
			sslContext.init( kmf.getKeyManagers(), tmf.getTrustManagers(), secureRandom );
		}catch(Exception e){
			System.out.println("SContext ERROR ...");
		}
	}
//--------------------------------------------------------------
	private static SSLSocket SCFactory() throws IOException {
		try{
			sf = sslContext.getSocketFactory();
			s = (SSLSocket)sf.createSocket(host, port);
		}catch(Exception e){
			System.out.println("SCFactory ERROR ...");
			s = null;
		}
		return s;
	}

}