code: /***************************************************************************
   *   Copyright (C) by Fabrizio Montesi                                     *
   *                                                                         *
   *   This program is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU Library General Public License as       *
   *   published by the Free Software Foundation; either version 2 of the    *
   *   License, or (at your option) any later version.                       *
   *                                                                         *
   *   This program is distributed in the hope that it will be useful,       *
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
   *   GNU General Public License for more details.                          *
   *                                                                         *
   *   You should have received a copy of the GNU Library General Public     *
   *   License along with this program; if not, write to the                 *
   *   Free Software Foundation, Inc.,                                       *
   *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
   *                                                                         *
   *   For details about the authors of this software, see the AUTHORS file. *
   ***************************************************************************/
  
  package joliex.security;
  
  import java.io.UnsupportedEncodingException;
  import java.math.BigInteger;
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import jolie.runtime.FaultException;
  import jolie.runtime.JavaService;
  import jolie.runtime.Value;
  
  public class MessageDigestService extends JavaService
  {
  	public String md5( Value request )
  		throws FaultException
  	{
  		MessageDigest md = null;
  		try {
  			md = MessageDigest.getInstance( "MD5" );
  			md.update( request.strValue().getBytes( "UTF8" ) );
  		} catch( UnsupportedEncodingException e ) {
  			throw new FaultException( "UnsupportedOperation", e );
  		} catch( NoSuchAlgorithmException e ) {
  			throw new FaultException( "UnsupportedOperation", e );
  		}
  		int radix;
  		if ( (radix=request.getFirstChild( "radix" ).intValue()) < 2 ) {
  			radix = 16;
  		}
  
  		String response = new BigInteger( 1, md.digest() ).toString( radix );
  		if ( response.length() < 32 ) {
  			int paddingLength = 32 - response.length();
  			StringBuilder sb = new StringBuilder();
  			for( int i = 0; i < paddingLength; i++ ) {
  				sb.append( "0" );
  			}
  			sb.append( response );
  			response = sb.toString();
  		}
  		return response;
  	}
  }
  