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* Copyright (c) 2003-2004, www.pdfbox.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of pdfbox; 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
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package org.pdfbox.pdmodel.encryption;
import org.pdfbox.cos.COSDictionary;
import org.pdfbox.cos.COSName;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* This class will handle loading of the different security handlers.
*
* See PDF Reference 1.4 section "3.5 Encryption"
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.7 $
* @deprecated Made deprecated by the new security layer of PDFBox. Use SecurityHandlers instead.
*/
public class PDEncryptionManager
{
private static Map handlerMap = Collections.synchronizedMap( new HashMap() );
static
{
registerSecurityHandler( PDStandardEncryption.FILTER_NAME, PDStandardEncryption.class );
}
private PDEncryptionManager()
{
}
/**
* This will allow the user to register new security handlers when unencrypting a
* document.
*
* @param filterName As described in the encryption dictionary.
* @param handlerClass A subclass of PDEncryptionDictionary that has a constructor that takes
* a COSDictionary.
*/
public static void registerSecurityHandler( String filterName, Class handlerClass )
{
handlerMap.put( COSName.getPDFName( filterName ), handlerClass );
}
/**
* This will get the correct security handler for the encryption dictionary.
*
* @param dictionary The encryption dictionary.
*
* @return An implementation of PDEncryptionDictionary(PDStandardEncryption for most cases).
*
* @throws IOException If a security handler could not be found.
*/
public static PDEncryptionDictionary getEncryptionDictionary( COSDictionary dictionary )
throws IOException
{
Object retval = null;
if( dictionary != null )
{
COSName filter = (COSName)dictionary.getDictionaryObject( COSName.FILTER );
Class handlerClass = (Class)handlerMap.get( filter );
if( handlerClass == null )
{
throw new IOException( "No handler for security handler '" + filter.getName() + "'" );
}
else
{
try
{
Constructor ctor = handlerClass.getConstructor( new Class[] {
COSDictionary.class
} );
retval = ctor.newInstance( new Object[] {
dictionary
} );
}
catch( NoSuchMethodException e )
{
throw new IOException( e.getMessage() );
}
catch( InstantiationException e )
{
throw new IOException( e.getMessage() );
}
catch( IllegalAccessException e )
{
throw new IOException( e.getMessage() );
}
catch( InvocationTargetException e )
{
throw new IOException( e.getMessage() );
}
}
}
return (PDEncryptionDictionary)retval;
}
}