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/*
* Copyright (c) 2010, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*
* $Id: ResolverId.java,v 1.2 2010-10-21 15:37:39 snajper Exp $
*/
package com.sun.xml.wss.impl.resolver;
import com.sun.xml.wss.impl.XWSSecurityRuntimeException;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.xpath.XPathExpressionException;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import com.sun.xml.wss.impl.misc.URI;
import org.apache.xml.security.signature.XMLSignatureInput;
import org.apache.xml.security.utils.XMLUtils;
import org.apache.xml.security.utils.resolver.ResourceResolverContext;
import org.apache.xml.security.utils.resolver.ResourceResolverException;
import org.apache.xml.security.utils.resolver.ResourceResolverSpi;
import com.sun.xml.wss.WSITXMLFactory;
import com.sun.xml.wss.impl.MessageConstants;
import com.sun.xml.wss.impl.dsig.NamespaceContextImpl;
import com.sun.xml.wss.logging.LogDomainConstants;
import com.sun.xml.wss.logging.LogStringsMessages;
import javax.xml.namespace.NamespaceContext;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
/**
* This resolver is used for resolving same-document URIs for eg. URI="#wsuId".
*
* @author Anil Tappetla
*/
public class ResolverId extends ResourceResolverSpi {
/* Implementation class name */
private static String implementationClassName =
ResolverId.class.getName();
protected static final Logger log =
Logger.getLogger(
LogDomainConstants.WSS_API_DOMAIN,
LogDomainConstants.WSS_API_DOMAIN_BUNDLE);
/**
* Method getResolverName
*
* @return The resolver implementation class name
*/
public static String getResolverName() {
return implementationClassName;
}
/**
* Method engineResolve
*
* @return XMLSignatureInput
*
*/
public XMLSignatureInput engineResolve(Attr uri, String BaseURI)
throws ResourceResolverException {
String uriNodeValue = uri.getNodeValue();
if (MessageConstants.debug) {
log.log(Level.FINEST, "uri = " + uriNodeValue);
}
Document doc = uri.getOwnerDocument();
// this must be done so that Xalan can catch ALL namespaces
XMLUtils.circumventBug2650(doc);
Element selectedElem = null;
if (uriNodeValue.equals("")) {
selectedElem = doc.getDocumentElement();
} else {
/*
* URI="#wsuId"
* Identifies a node-set containing the element with wsu:Id attribute
* value 'wsuId' of the XML resource containing the signature.
* XML Signature (and its applications) modify this node-set to
* include the element plus all descendents including namespaces and
* attributes -- but not comments.
*/
String id = uriNodeValue.substring(1);
selectedElem = getElementById(doc, id);
}
if (selectedElem == null) {
log.log(Level.SEVERE,
LogStringsMessages.WSS_0604_CANNOT_FIND_ELEMENT());
throw new ResourceResolverException("empty", uri.getValue(), BaseURI);
}
Set resultSet = dereferenceSameDocumentURI(selectedElem);
XMLSignatureInput result = new XMLSignatureInput(resultSet);
result.setMIMEType("text/xml");
try {
URI uriNew = new URI(new URI(BaseURI), uri.getNodeValue());
result.setSourceURI(uriNew.toString());
} catch (URI.MalformedURIException ex) {
result.setSourceURI(BaseURI);
}
return result;
}
/**
* Method engineCanResolve
*
* @return true if uri node can be resolved, false otherwise
*/
public boolean engineCanResolve(Attr uri, String BaseURI) {
if (uri == null) return false;
String uriNodeValue = uri.getNodeValue();
return uriNodeValue.startsWith("#");
}
public NamespaceContext getNamespaceContext(Document doc) {
NamespaceContextImpl nsContext = new NamespaceContextImpl();
nsContext.add(
doc.getDocumentElement().getPrefix(), doc.getDocumentElement().getNamespaceURI());
if (doc.getDocumentElement().getNamespaceURI() == MessageConstants.SOAP_1_2_NS) {
nsContext.add("SOAP-ENV", MessageConstants.SOAP_1_2_NS);
nsContext.add("env", MessageConstants.SOAP_1_2_NS);
}
nsContext.add("wsu", MessageConstants.WSU_NS);
nsContext.add("wsse", MessageConstants.WSSE_NS);
return nsContext;
}
/**
* Looks up elements with wsu:Id or Id in xenc or dsig namespace
*
* @return element
*
*/
private Element getElementById(
Document doc,
String id) {
Element selement = doc.getElementById(id);
if (selement != null) {
if (MessageConstants.debug) {
log.log(Level.FINEST, "Document.getElementById() returned " + selement);
}
return selement;
}
if (MessageConstants.debug) {
log.log(Level.FINEST, "Document.getElementById() FAILED......'" + id + "'");
}
Element element = null;
//------------------------
NodeList elems = null;
String xpath = "//*[@wsu:Id='" + id + "']";
XPathFactory xpathFactory = WSITXMLFactory.createXPathFactory(WSITXMLFactory.DISABLE_SECURE_PROCESSING);
XPath xPATH = xpathFactory.newXPath();
xPATH.setNamespaceContext(getNamespaceContext(doc));
XPathExpression xpathExpr;
try {
xpathExpr = xPATH.compile(xpath);
elems = (NodeList)xpathExpr.evaluate(doc,XPathConstants.NODESET);
} catch (XPathExpressionException ex) {
//TODO: this logstring is not in this package
log.log(Level.SEVERE,
LogStringsMessages.WSS_0375_ERROR_APACHE_XPATH_API(id, ex.getMessage()),
new Object[] {id, ex.getMessage()});
throw new XWSSecurityRuntimeException(ex);
}
if (elems != null) {
if (elems.getLength() > 1) {
//TODO: localize the string
throw new XWSSecurityRuntimeException("XPath Query resulted in more than one node");
} else {
element = (Element)elems.item(0);
}
}
if (element == null) {
xpath = "//*[@Id='" + id + "']";
try {
xpathExpr = xPATH.compile(xpath);
elems = (NodeList)xpathExpr.evaluate(doc,XPathConstants.NODESET);
} catch (XPathExpressionException ex) {
//TODO: this logstring is not in this package
log.log(Level.SEVERE,
LogStringsMessages.WSS_0375_ERROR_APACHE_XPATH_API(id, ex.getMessage()),
new Object[] {id, ex.getMessage()});
throw new XWSSecurityRuntimeException(ex);
}
}
if (elems != null) {
if (elems.getLength() > 1) {
for (int i=0; i < elems.getLength(); i++) {
Element elem = (Element)elems.item(i);
String namespace = elem.getNamespaceURI();
if (namespace.equals(MessageConstants.DSIG_NS) ||
namespace.equals(MessageConstants.XENC_NS)) {
element = elem;
break;
}
}
} else {
element = (Element)elems.item(0);
}
}
/*
Element nscontext = XMLUtils.createDSctx(doc,
"wsu",
MessageConstants.WSU_NS);
Element element =
(Element) XPathAPI.selectSingleNode(
doc, "//*[@wsu:Id='" + id + "']", nscontext);
if (element == null) {
NodeList elems = XPathAPI.selectNodeList(
doc,
"//*[@Id='" + id + "']",
nscontext);
for (int i=0; i < elems.getLength(); i++) {
Element elem = (Element)elems.item(i);
String namespace = elem.getNamespaceURI();
if (namespace.equals(MessageConstants.DSIG_NS) ||
namespace.equals(MessageConstants.XENC_NS)) {
element = elem;
break;
}
}
}
*/
//-----------------------
// look for SAML AssertionID
if (element == null) {
NodeList assertions = doc.getElementsByTagName(MessageConstants.SAML_ASSERTION_LNAME);
int len = assertions.getLength();
if (len > 0) {
for (int i=0; i < len; i++) {
Element elem = (Element)assertions.item(i);
String assertionId = elem.getAttribute(MessageConstants.SAML_ASSERTIONID_LNAME);
if (id.equals(assertionId)) {
element = elem;
break;
}
}
}
}
return element;
}
/**
* Dereferences a same-document URI fragment.
*
* @param node the node referenced by the -
* URI fragment. If null, returns -
* an empty set.
*/
private Set dereferenceSameDocumentURI(Node node) {
Set nodeSet = new HashSet();
if (node != null) {
nodeSetMinusCommentNodes(node, nodeSet, null);
}
return nodeSet;
}
/**
* Method nodeSetMinusCommentNodes
*
* @param node the node to traverse
* @param nodeSet the set of nodes traversed so far
* @param prevSibling the previous sibling node
*/
@SuppressWarnings("unchecked")
private void nodeSetMinusCommentNodes(Node node, Set nodeSet,
Node prevSibling) {
switch (node.getNodeType()) {
case Node.ELEMENT_NODE :
NamedNodeMap attrs = node.getAttributes();
if (attrs != null) {
for (int i = 0; i
