/**
    * Copyright 2011-2013 The Kuali Foundation Licensed under the Educational
    * Community 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.osedu.org/licenses/ECL-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.kuali.mobility.util;
  
  import java.io.UnsupportedEncodingException;
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import org.apache.commons.codec.binary.Base64;
  import org.apache.commons.codec.binary.Hex;
  
  /**
   *
   * @author Joe Swanson <joseswan@umich.edu>
   */
  public class DigestUtil {
  
  	public static byte[] MD5(String text) throws NoSuchAlgorithmException,
  			UnsupportedEncodingException {
  		MessageDigest md;
  		md = MessageDigest.getInstance("MD5");
  		byte[] md5hash = new byte[32];
  		md.update(text.getBytes());
  		md5hash = md.digest();
  		return md5hash;
  	}
  
  	public static String getMD5(String text)
  	{
  		return getHexEncodedHash(text);
  	}
  
  	public static String getBase64EncodedHash(final String text)
  	{
  		String ret = null;
  		try
  		{
  			byte[] encodedDigest = Base64.encodeBase64(MD5(text));
  			ret = new String(encodedDigest);
  		}
  		catch (NoSuchAlgorithmException nsae)
  		{
  			ret = "Error";
  		}
  		catch (UnsupportedEncodingException uee)
  		{
  			ret = "Error";
  		}
  		return ret;
  	}
  
  	public static String getHexEncodedHash(final String text)
  	{
  		String ret = null;
  		try
  		{
  			char[] encodedDigest = Hex.encodeHex(MD5(text));
  			ret = new String(encodedDigest);
  		}
  		catch (NoSuchAlgorithmException nsae)
  		{
  			ret = "Error";
  		}
  		catch (UnsupportedEncodingException uee)
  		{
  			ret = "Error";
  		}
  		return ret;
  	}
  }