TestTRNG.java

import java.security.SecureRandom;
import java.security.Security;

import org.random.rjgodoy.trng.MH_SecureRandom;
import org.random.rjgodoy.trng.RjgodoyProvider;

/**
 * Example of how to use this library with www.random.org by Mads Haahr.
 * @author Javier Godoy
 */
public class TestTRNG {

	//Some logging configuration, this could be safely removed
	static {
		System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.SimpleLog");
		System.setProperty("org.apache.commons.logging.simplelog.showdatetime",           "false");
		System.setProperty("org.apache.commons.logging.simplelog.showlogname",            "false");
		System.setProperty("org.apache.commons.logging.simplelog.showShortLogname",       "true");


		/*There are four log modules in this library:
		 *
		 * org.apache.commons.logging.simplelog.log.MH_SecureRandomSpi
		 *   (the SecureRandom engine)
		 *
		 * org.apache.commons.logging.simplelog.log.MH_HttpClient
		 *   (the HTTP client connecting to www.random.org)
		 *
		 * org.apache.commons.logging.simplelog.log.MH_Daemon
		 *   (the pool daemon)
		 *
		 * org.apache.commons.logging.simplelog.log.RjgodoyProvider
		 *   (the provider which registers MH_SecureRandomSpi with the Java API)
		 */
		System.setProperty("org.apache.commons.logging.simplelog.log.MH_SecureRandomSpi",  "info");
		System.setProperty("org.apache.commons.logging.simplelog.log.MH_HttpClient",       "info");
		System.setProperty("org.apache.commons.logging.simplelog.log.MH_Daemon",           "info");
		System.setProperty("org.apache.commons.logging.simplelog.log.RjgodoyProvider",     "info");
	}

	/** Sample <code>main</code> method.
	 * @param args No arguments are expected.
	 * @throws Throwable if the algorithm is not happy.
	 */
	public static void main(String[] args) throws Throwable {
		//IMPORTANT: system properties must be set before requesting the SecureRandom instance!

		//Sets the user information (for the HTTP User-Agent header)
		System.setProperty(MH_SecureRandom.USER,"user@example.org");

		//How many minutes will we wait befor aborting the connection?
		System.setProperty(MH_SecureRandom.TIMEOUT,"2");

		//Use TLS for connecting the server.
		System.setProperty(MH_SecureRandom.SSL_PROTOCOL,"TLSv1");
	  //System.setProperty(MH_SecureRandom.SSL_PROVIDER,"SunJSSE");

		//Uncomment this to verify the server certificate
		System.setProperty(MH_SecureRandom.CERTFILE,"www_random_org.cer");

    //Configure how many HTTP redirects will be followed
		//Normally, there shouldn't be any redirect.
		System.setProperty(MH_SecureRandom.MAX_REDIRECTS,"5");


		//register the provider
		Security.addProvider(new RjgodoyProvider());

		//creates a SecureRandom object using the MH_TRNG algorithm (which access www.random.org)
		SecureRandom srandom = SecureRandom.getInstance("MH_TRNG");

		System.err.flush(); Thread.yield();
		System.out.println("Now, ask for some random bits");


		for (int i=0;i<8193;i++) {
			System.out.print(srandom.nextBoolean()?"0":"1");
		}

	}

}