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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ws.extensions.security;
import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.xml.security.c14n.CanonicalizationException;
import org.apache.xml.security.c14n.Canonicalizer;
import org.apache.xml.security.c14n.InvalidCanonicalizerException;
import org.apache.xml.security.signature.XMLSignatureInput;
import org.apache.xml.security.transforms.Transform;
import org.apache.xml.security.transforms.TransformSpi;
import org.apache.xml.security.transforms.TransformationException;
import org.apache.xml.security.utils.XMLUtils;
import org.jboss.util.NotImplementedException;
import org.jboss.ws.WSException;
import org.jboss.ws.core.utils.ThreadLocalAssociation;
import org.jboss.ws.extensions.security.element.BinarySecurityToken;
import org.jboss.ws.extensions.security.element.SecurityTokenReference;
import org.jboss.ws.extensions.security.exception.WSSecurityException;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
/**
* <code>STRTransform</code> implements the STR-Transform specified in the
* WS-Security specification. This class dynamically registers itself with
* XML Security on its first load (using a static initializer).
*
* You must call the static yet thread safe setSecurityStore() before use of
* this class.
*
* @author <a href="mailto:jason.greene@jboss.com">Jason T. Greene</a>
* @version $Revision: 5034 $
*/
public class STRTransform extends TransformSpi
{
public static final String STR_URI = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#STR-Transform";
static
{
try
{
Transform.register(STR_URI, STRTransform.class.getName());
}
catch (Exception e)
{
// Eat
}
}
private String canonicalize(Element element, Element method) throws TransformationException, InvalidCanonicalizerException, CanonicalizationException
{
if (method == null || ! method.getLocalName().equals("CanonicalizationMethod"))
throw new TransformationException("CanonicalizationMethod expected!");
String algorithm = method.getAttribute("Algorithm");
if (algorithm == null || algorithm.length() == 0)
throw new TransformationException("CanonicalizationMethod missing algorithm!");
Canonicalizer canon = Canonicalizer.getInstance(algorithm);
return new String(canon.canonicalizeSubtree(element, "#default"));
}
@Override
protected String engineGetURI()
{
return STR_URI;
}
@Override
protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input) throws IOException, CanonicalizationException,
InvalidCanonicalizerException, TransformationException, ParserConfigurationException, SAXException
{
SecurityStore store = ThreadLocalAssociation.localStrTransformAssoc().get();
if (store == null)
throw new WSException("SecurityStore Thread Local not initialized before call!");
try
{
if (! input.isElement())
throw new NotImplementedException("Only element input is supported");
// Resolve the BinarySecurityToken associated with this SecurityTokenReference
Element element = (Element)input.getSubNode();
SecurityTokenReference ref = new SecurityTokenReference(element);
KeyResolver resolver = new KeyResolver(store);
BinarySecurityToken token = resolver.resolve(ref);
// Get the specially formated dom element for this element
element = token.getSTRTransformElement();
// Obtain the canonicalizer specified in the transformation parameters
Element parameters = XMLUtils.selectNode(this._transformObject.getElement().getFirstChild(), Constants.WSSE_NS,
"TransformationParameters", 0);
if (parameters == null)
throw new TransformationException("wsse:TransformationParameters expected!");
Element method = Util.getFirstChildElement(parameters);
String transformed = canonicalize(element, method);
// Now WS-Security says we must augment the transformed output to ensure that there is
// a default namespace
int startTag = transformed.indexOf('<');
int endTag = transformed.indexOf('>', startTag + 1);
String within = transformed.substring(startTag + 1, endTag);
if (! within.contains("xmlns="))
{
int insPos = within.indexOf(" ") + startTag + 1;
transformed = new StringBuilder(transformed).insert(insPos, " xmlns=\"\"").toString();
}
return new XMLSignatureInput(transformed.getBytes());
}
catch (WSSecurityException e)
{
throw new TransformationException(e.getMessage(), e);
}
finally
{
ThreadLocalAssociation.localStrTransformAssoc().set(null);
}
}
public static void setSecurityStore(SecurityStore store)
{
ThreadLocalAssociation.localStrTransformAssoc().set(store);
}
public boolean wantsOctetStream()
{
return false;
}
public boolean wantsNodeSet()
{
return false;
}
public boolean returnsOctetStream()
{
return false;
}
public boolean returnsNodeSet()
{
return false;
}
}
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