/*
* The Apache Software License, Version 1.1
*
*
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Institute for
* Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
* The development of this software was partly funded by the European
* Commission in the <WebSig> project in the ISIS Programme.
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package org.apache.xml.security.keys.keyresolver.implementations;
import java.io.ByteArrayInputStream;
import java.security.*;
import java.security.spec.*;
import java.security.cert.*;
import org.w3c.dom.*;
import org.apache.xml.security.keys.content.x509.XMLX509Certificate;
import org.apache.xml.security.keys.keyresolver.*;
import org.apache.xml.security.utils.*;
import org.apache.xml.security.signature.XMLSignatureException;
import org.apache.xml.security.exceptions.XMLSecurityException;
import javax.xml.transform.TransformerException;
import org.apache.xpath.XPathAPI;
import org.apache.xml.security.keys.storage.*;
/**
* Resolves Certificates which are directly contained inside a
* <CODE>ds:X509Certificate</CODE> Element.
*
* @author $Author: vdkoogh $
*/
public class X509CertificateResolver extends KeyResolverSpi {
/** {@link org.apache.log4j} logging facility */
static org.apache.log4j.Category cat =
org.apache.log4j.Category
.getInstance(X509CertificateResolver.class.getName());
/** Field _dsaKeyElement */
NodeList _x509CertKeyElements = null;
/**
* Method engineCanResolve
*
* @param element
* @param BaseURI
* @param storage
*
*/
public boolean engineCanResolve(Element element, String BaseURI,
StorageResolver storage) {
cat.debug("Can I resolve " + element.getTagName() + "?");
try {
XMLUtils.guaranteeThatElementInSignatureSpace(element,
Constants._TAG_X509DATA);
} catch (XMLSignatureException ex) {
cat.debug("I can't");
return false;
}
try {
Element nscontext = XMLUtils.createDSctx(element.getOwnerDocument(), "ds", Constants.SignatureSpecNS);
this._x509CertKeyElements = XPathAPI.selectNodeList(element,
"./ds:" + Constants._TAG_X509CERTIFICATE, nscontext);
if ((this._x509CertKeyElements != null)
&& (this._x509CertKeyElements.getLength() > 0)) {
cat.debug("Yes Sir, I can");
return true;
}
} catch (TransformerException ex) {}
cat.debug("I can't");
return false;
}
/** Field _x509certObject[] */
XMLX509Certificate _x509certObject[] = null;
/**
* Method engineResolvePublicKey
*
* @param element
* @param BaseURI
* @param storage
*
* @throws KeyResolverException
*/
public PublicKey engineResolvePublicKey(
Element element, String BaseURI, StorageResolver storage)
throws KeyResolverException {
X509Certificate cert = this.engineResolveX509Certificate(element,
BaseURI, storage);
if (cert != null) {
return cert.getPublicKey();
}
return null;
}
/**
* Method engineResolveX509Certificate
*
* @param element
* @param BaseURI
* @param storage
*
* @throws KeyResolverException
*/
public X509Certificate engineResolveX509Certificate(
Element element, String BaseURI, StorageResolver storage)
throws KeyResolverException {
try {
if ((this._x509CertKeyElements == null)
|| (this._x509CertKeyElements.getLength() == 0)) {
boolean weCanResolve = this.engineCanResolve(element, BaseURI,
storage);
if (!weCanResolve || (this._x509CertKeyElements == null)
|| (this._x509CertKeyElements.getLength() == 0)) {
return null;
}
}
this._x509certObject =
new XMLX509Certificate[this._x509CertKeyElements.getLength()];
// populate Object array
for (int i = 0; i < this._x509CertKeyElements.getLength(); i++) {
this._x509certObject[i] =
new XMLX509Certificate((Element) this._x509CertKeyElements
.item(i), BaseURI);
}
for (int i = 0; i < this._x509certObject.length; i++) {
X509Certificate cert = this._x509certObject[i].getX509Certificate();
if (cert != null) {
return cert;
}
}
return null;
} catch (XMLSecurityException ex) {
cat.debug("XMLSecurityException", ex);
throw new KeyResolverException("generic.EmptyMessage", ex);
}
}
/**
* Method engineResolveSecretKey
*
* @param element
* @param BaseURI
* @param storage
*
* @throws KeyResolverException
*/
public javax.crypto.SecretKey engineResolveSecretKey(
Element element, String BaseURI, StorageResolver storage)
throws KeyResolverException {
return null;
}
}