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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.element;
import java.security.cert.X509Certificate;
import org.apache.xml.security.exceptions.Base64DecodingException;
import org.apache.xml.security.utils.Base64;
import org.apache.xml.security.utils.XMLUtils;
import org.jboss.ws.extensions.security.Constants;
import org.jboss.ws.extensions.security.exception.WSSecurityException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* <code>KeyIdentifier</code> is a reference type within a
* <code>SecurityTokenReference</code> that referes to a token that
* using some uniquely identifying characteristic. An example is an
* X.509v3 Subject Key Identifier, which is the only currently
* supported key identifier by this class.
*
* @see org.jboss.ws.extensions.security.element.SecurityTokenReference
* @see org.jboss.ws.extensions.security.element.BinarySecurityToken
*
* @author Jason T. Greene
* @version $Id: KeyIdentifier.java 5034 2007-11-12 14:08:23Z alessio.soldano@jboss.com $
*/
public class KeyIdentifier extends Reference
{
public static final String SKI_TYPE = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509SubjectKeyIdentifier";
private Document doc;
private String value;
private Element cachedElement;
public KeyIdentifier(Document doc, BinarySecurityToken token) throws WSSecurityException
{
this.doc = doc;
referenceToken(token);
}
public KeyIdentifier(Element element) throws WSSecurityException
{
this.doc = element.getOwnerDocument();
if (! "KeyIdentifier".equals(element.getLocalName()))
throw new WSSecurityException("Invalid message, invalid local name on a KeyIdentifier");
String valueType = element.getAttribute("ValueType");
if (valueType == null || valueType.length() == 0)
throw new WSSecurityException("Inavliad message, KeyIdentifier element is missing an ValueType");
if (! SKI_TYPE.equals(valueType))
throw new WSSecurityException("Currently only SubjectKeyIdentifiers are supported, was passed: " + valueType);
// Lets be soft on encoding type since other clients don't properly use it
this.value = XMLUtils.getFullTextChildrenFromElement(element);
}
public void referenceToken(BinarySecurityToken token) throws WSSecurityException
{
if (! (token instanceof X509Token))
throw new WSSecurityException("KeyIdentifier tried to reference something besides an X509 token");
X509Token x509 = (X509Token) token;
X509Certificate cert = x509.getCert();
// Maybee we should make one ourselves if it isn't there?
byte[] encoded = cert.getExtensionValue("2.5.29.14");
if (encoded == null)
throw new WSSecurityException("Certificate did not contain a subject key identifier!");
// We need to skip 4 bytes [(OCTET STRING) (LENGTH)[(OCTET STRING) (LENGTH) (Actual data)]]
int trunc = encoded.length - 4;
byte[] identifier = new byte[trunc];
System.arraycopy(encoded, 4, identifier, 0, trunc);
value = Base64.encode(identifier);
}
public String getValue()
{
return value;
}
public String getValueType()
{
// Support only SKI at the moment
return SKI_TYPE;
}
public Document getDocument()
{
return doc;
}
public byte[] getIdentifier() throws WSSecurityException
{
if (value == null)
return null;
try
{
return Base64.decode(value);
}
catch (Base64DecodingException e)
{
throw new WSSecurityException("Error decoding key identifier", e);
}
}
public Element getElement()
{
if (cachedElement != null)
return cachedElement;
Element element = doc.createElementNS(Constants.WSSE_NS, Constants.WSSE_PREFIX + ":" + "KeyIdentifier");
element.setAttribute("ValueType", getValueType());
element.setAttribute("EncodingType", Constants.BASE64_ENCODING_TYPE);
element.appendChild(doc.createTextNode(value));
cachedElement = element;
return cachedElement;
}
}
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