content: /* -- BEGIN NOTICE --
   * 
   * This class uses in parts extant and/or modified code from net.spy.memcached.HashAlgorithm
   * by Dustin Sallings.  See this module's 3rd party license folder for license details.
   * 
   * -- END NOTICE -- 
   * 
   *   Copyright 2009-2010 Joubin Houshyar
   * 
   *   Licensed under the Apache License, Version 2.0 (the "License");
   *   you may not use this file except in compliance with the License.
   *   You may obtain a copy of the License at
   *    
   *   http://www.apache.org/licenses/LICENSE-2.0
   *    
   *   Unless required by applicable law or agreed to in writing, software
   *   distributed under the License is distributed on an "AS IS" BASIS,
   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *   See the License for the specific language governing permissions and
   *   limitations under the License.
   */
  
  package org.jredis.ri.cluster.support;
  
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import org.jredis.ClientRuntimeException;
  
  /**
   * [TODO: document me!]
   *
   * @author  joubin (alphazero@sensesay.net)
   * @date    Mar 26, 2010
   * 
   */
  
  public class CryptoHashUtils {
  	/**
  	 * Get the md5 of the given key. 
  	 * @throws ClientRuntimeException if MD5 algorithm is not supported.
  	 * @throws IllegalArgumentException if input is null or zero length
  	 * 
  	 * @Copyright (c) 2006-2009  Dustin Sallings <dustin@spy.net> 
  	 */
  	public static byte[] computeMd5(byte[] b) throws ClientRuntimeException{
  		if(null == b) throw new IllegalArgumentException ("null input");
  		if(b.length == 0) throw new IllegalArgumentException ("zero length input");
  		MessageDigest md5 = null;
  		try {
  	        md5 = MessageDigest.getInstance("MD5");
  			md5.reset();
  			md5.update(b);
          }
          catch (NoSuchAlgorithmException e) {
          	throw new ClientRuntimeException("MD5 Message Digest algorithm is not present in this JRE", e);
          }
  		return md5.digest();
  	}
  	
  	/**
  	 * @param s
  	 * @return
  	 * @throws ClientRuntimeException
  	 * @throws IllegalArgumentException if input is null or zero length
  	 */
  	public static byte[] computeMd5(String s) throws ClientRuntimeException{
  		if(null == s) throw new IllegalArgumentException ("null input");
  		return computeMd5(s.getBytes());
  	}
  }
  