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SslServerCmd.java - SSL Server Command Example
How to create an SSL server program to run like a command?
✍: FYIcenter
In order to create an SSL server program, you need to do the following:
1. Load the keystore file that contains the server certificate. Remember to specify the keystore password as shown below:
KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("server.jks"), "fyicenter".toCharArray());
2. Create an KeyManagerFactory instance and initialize it with the keystore. Remember to specify the private key password of the server certificate as shown below:
KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); kmf.init(ks, "fyicenter".toCharArray());
3. Create an SSLContext instance and initialize it with Key Managers:
SSLContext ctx = SSLContext.getInstance("TLS"); ctx.init(kmf.getKeyManagers(), null, null);
4. Create an SSLServerSocket instance and set it to listen mode to accept incoming client requests:
SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); SSLServerSocket ss = (SSLServerSocket)ssf.createServerSocket(port); SSLSocket socket = (SSLSocket) ss.accept();
Here is the entire sample program code that takes a simple request and returns a simple reponse using SSL Server Socket:
// Copyright (c) FYIcenter.com import java.net.*; import java.io.*; import javax.net.ssl.*; import java.security.KeyStore; public class SslServerCmd { public static void main(String[] args) throws Exception { int port = 8080; String clientAuth = "No"; System.out.println("USAGE: java SslServerCmd [port [clientAuth]]"); if (args.length >= 1) port = Integer.parseInt(args[0]); if (args.length >= 2) clientAuth = args[1]; KeyStore ks = KeyStore.getInstance("JKS"); ks.load(new FileInputStream("server.jks"), "fyicenter".toCharArray()); KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); kmf.init(ks, "fyicenter".toCharArray()); SSLContext ctx = SSLContext.getInstance("TLS"); ctx.init(kmf.getKeyManagers(), null, null); SSLServerSocketFactory ssf = ctx.getServerSocketFactory(); SSLServerSocket ss = (SSLServerSocket)ssf.createServerSocket(port); if (clientAuth.equals("Yes")) ss.setNeedClientAuth(true); System.out.println("Listening: port="+port+", clientAuth="+clientAuth); SSLSocket socket = (SSLSocket) ss.accept(); BufferedReader in = new BufferedReader(new InputStreamReader( socket.getInputStream())); String line = in.readLine(); while (line.length()>0) { System.out.println(line); line = in.readLine(); } PrintWriter out = new PrintWriter(new BufferedWriter( new OutputStreamWriter(socket.getOutputStream()))); out.println("HTTP/1.0 200 OK"); out.println("Content-Type: text/html"); out.println("Content-Length: 40"); // including \r\n out.println(); out.println("<html><body>Hello there!</body></html>"); out.flush(); out.close(); in.close(); socket.close(); } }
You can compile and run the above example in a command window. Make sure the keystore file, server.jks, created in the previous tutorial is available.
\fyicenter>\local\jdk-1.8.0\bin\javac SslServerCmd.java \fyicenter>\local\jdk-1.8.0\bin\java SslServerCmd USAGE: java SslServerCmd [port [clientAuth]] Listening: port=8080, clientAuth=No
The SSL server is ready to any client to make a connection.
⇒ Connect to SSL Server Failed with Invalid Certificate
⇐ Create SSL Server Certificate with "keytool"
2018-06-27, 2198🔥, 0💬
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