/**

 * Berlin Brown

 * Dec 6, 2006

 *

 * -------------------------- COPYRIGHT_AND_LICENSE --

 * Botlist contains an open source suite of software applications for 

 * social bookmarking and collecting online news content for use on the web.  

 * Multiple web front-ends exist for Django, Rails, and J2EE.  

 * Users and remote agents are allowed to submit interesting articles.

 *

 * Copyright (c) 2007, Botnode.com (Berlin Brown)

 * http://www.opensource.org/licenses/bsd-license.php

 *

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without modification, 

 * are permitted provided that the following conditions are met:

 *

 *	    * Redistributions of source code must retain the above copyright notice, 

 *	    this list of conditions and the following disclaimer.

 *	    * Redistributions in binary form must reproduce the above copyright notice, 

 *	    this list of conditions and the following disclaimer in the documentation 

 *	    and/or other materials provided with the distribution.

 *	    * Neither the name of the Botnode.com (Berlin Brown) nor 

 *	    the names of its contributors may be used to endorse or promote 

 *	    products derived from this software without specific prior written permission.

 *	

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 * -------------------------- END_COPYRIGHT_AND_LICENSE --

 */

package org.bresearch.websec.utils.botlist;



import java.net.InetAddress;

import java.net.UnknownHostException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.util.Random;



/**

 * This is class is used by botverse.

 * 

 * Usage: BotListUniqueId.getUniqueId())

 * @author Berlin Brown

 *

 */

public class BotlistUniqueId {

			

	private String toHexString(byte[] bytes) {



        char[] ret = new char[bytes.length * 2];

        for (int i = 0, j = 0; i < bytes.length; i++) {         

            int c = (int) bytes[i];

            if (c < 0) {

                c += 0x100;

            }           

            ret[j++] = Character.forDigit(c / 0x10, 0x10);

            ret[j++] = Character.forDigit(c % 0x10, 0x10);



        }



        return new String(ret);

	}

	

	public String getUniqueId() {

		

		String digest = "";

		

		try {

			MessageDigest md = MessageDigest.getInstance("MD5");

			

			String timeVal = "" + (System.currentTimeMillis() + 1);

			String localHost = "";;

			try {

				localHost = InetAddress.getLocalHost().toString();

			} catch (UnknownHostException e) {

				// If an error, we can use other values.				

			}

			

			String randVal = "" + new Random().nextInt();

			String val = timeVal + localHost + randVal;

			md.reset();

			md.update(val.getBytes());



			// Generate the digest.

			digest = toHexString(md.digest());

		} catch(NoSuchAlgorithmException e) {

			

		} // End of the Try - Catch

		

		return digest;

	} // End of the Method //

	

}