/*
* Copyright 2006-2009 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
*/
package javax.xml.crypto.test.dsig;
import java.io.*;
import java.util.*;
import javax.xml.crypto.*;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dsig.dom.DOMValidateContext;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import org.w3c.dom.traversal.*;
/**
* This is a class which performs xml signature validation upon request
*
* @author Sean Mullan
* @author Valerie Peng
*/
public class SignatureValidator {
private File dir;
public SignatureValidator(File base) {
dir = base;
}
public boolean validate(String fn, KeySelector ks) throws Exception {
return validate(fn, ks, null);
}
public DOMValidateContext getValidateContext(String fn, KeySelector ks)
throws Exception {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
dbf.setValidating(false);
Document doc = dbf.newDocumentBuilder().parse(new File(dir, fn));
Element sigElement = getSignatureElement(doc);
if (sigElement == null) {
throw new Exception("Couldn't find signature Element");
}
DOMValidateContext vc = new DOMValidateContext(ks, sigElement);
vc.setBaseURI(dir.toURI().toString());
return vc;
}
public boolean validate(String fn, KeySelector ks, URIDereferencer ud)
throws Exception {
DOMValidateContext vc = getValidateContext(fn, ks);
if (ud != null) {
vc.setURIDereferencer(ud);
}
return validate(vc);
}
public boolean validate(DOMValidateContext vc) throws Exception {
XMLSignatureFactory factory = XMLSignatureFactory.getInstance
("DOM", new org.jcp.xml.dsig.internal.dom.XMLDSigRI());
XMLSignature signature = factory.unmarshalXMLSignature(vc);
boolean coreValidity = signature.validate(vc);
// Check core validation status
if (coreValidity == false) {
// check the validation status of each Reference
Iterator i = signature.getSignedInfo().getReferences().iterator();
for (int j=0; i.hasNext(); j++) {
Reference reference = (Reference) i.next();
reference.validate(vc);
}
}
return coreValidity;
}
public static Element getSignatureElement(Document doc) {
NodeIterator ni = ((DocumentTraversal)doc).createNodeIterator(
doc.getDocumentElement(), NodeFilter.SHOW_ELEMENT, null, false);
for(Node n = ni.nextNode(); n != null; n = ni.nextNode() ) {
if("Signature".equals(n.getLocalName())) {
return (Element) n;
}
}
return null;
}
}