//George Koutsogiannakis
// 2/13/2007
//every execution of this program produces a
//different key because KeyGenerator uses SecureRandom
//as a source of randomness

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.security.Key;

public class SymmetricCryptography

{
	public static String formatKey(Key key)
	{

		StringBuffer sb=new StringBuffer();
		String algo=key.getAlgorithm();

		//returns the name of the algorithm used
		//such as DES, DSA, RSA
		String fmt=key.getFormat();
		//returns the encoded format of the key
		//such as RAW X.509 (public), PKCS#8(private)
		byte[] encoded=key.getEncoded();
		//returns the encoded value of the key as a byte
		sb.append("Key{algorithm="+algo+", format="+fmt+", bytes="+encoded.length+"]\n");

		if(fmt.equalsIgnoreCase("RAW"))
		{
			for(int i=0; i<=encoded.length-1; i++)
			{
				sb.append("The encoded values are:"+encoded[i]+"\n");

			}
		}

		return sb.toString();
	}

	public static void main(String[] args)
	{
		try
		{
			KeyGenerator kg=KeyGenerator.getInstance("DES");
			kg.init(56);
			SecretKey key=kg.generateKey();
			System.out.println("The key is"+"\n"+formatKey(key));
		}
		catch(Exception e) {}

	}

}