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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.wss4j.dom.callback;
import java.util.Collections;
import java.util.List;
import javax.xml.crypto.dom.DOMCryptoContext;
import org.apache.wss4j.dom.WSConstants;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.common.util.XMLUtils;
import org.apache.wss4j.dom.util.WSSecurityUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* This class uses a DOM-based approach to locate Elements that are referenced via an Id.
*/
public class DOMCallbackLookup implements CallbackLookup {
private Document doc;
public DOMCallbackLookup(Document doc) {
this.doc = doc;
}
/**
* Get the DOM element that corresponds to the given id and ValueType reference. The Id can
* be a wsu:Id or else an Id attribute, or a SAML Id when the ValueType refers to a SAML
* Assertion.
*
* @param id The id of the element to locate
* @param valueType The ValueType attribute of the element to locate (can be null)
* @param checkMultipleElements If true then go through the entire tree and return
* null if there are multiple elements with the same Id
* @return the located element
* @throws WSSecurityException
*/
public Element getElement(
String id, String valueType, boolean checkMultipleElements
) throws WSSecurityException {
return getAndRegisterElement(id, valueType, checkMultipleElements, null);
}
/**
* Get the DOM element that corresponds to the given id and ValueType reference. The Id can
* be a wsu:Id or else an Id attribute, or a SAML Id when the ValueType refers to a SAML
* Assertion. The implementation is also responsible to register the retrieved Element on the
* DOMCryptoContext argument, so that the XML Signature implementation can find the Element.
*
* @param id The id of the element to locate
* @param valueType The ValueType attribute of the element to locate (can be null)
* @param checkMultipleElements If true then go through the entire tree and return
* null if there are multiple elements with the same Id
* @param context The DOMCryptoContext to store the Element in
* @return the located element
* @throws WSSecurityException
*/
public Element getAndRegisterElement(
String id, String valueType, boolean checkMultipleElements, DOMCryptoContext context
) throws WSSecurityException {
String idToMatch = XMLUtils.getIDFromReference(id);
//
// Try the SOAP Body first
//
Element bodyElement = getSOAPBody();
if (bodyElement != null) {
String cId = bodyElement.getAttributeNS(WSConstants.WSU_NS, "Id");
if (cId.equals(idToMatch)) {
if (context != null) {
context.setIdAttributeNS(bodyElement, WSConstants.WSU_NS, "Id");
}
return bodyElement;
}
}
// Otherwise do a general search
Element foundElement =
XMLUtils.findElementById(doc.getDocumentElement(), idToMatch, checkMultipleElements);
if (foundElement != null) {
if (context != null) {
if (foundElement.hasAttributeNS(WSConstants.WSU_NS, "Id")
&& idToMatch.equals(foundElement.getAttributeNS(WSConstants.WSU_NS, "Id"))) {
context.setIdAttributeNS(foundElement, WSConstants.WSU_NS, "Id");
}
if (foundElement.hasAttributeNS(null, "Id")
&& idToMatch.equals(foundElement.getAttributeNS(null, "Id"))) {
context.setIdAttributeNS(foundElement, null, "Id");
}
}
return foundElement;
}
//
// Try to find a SAML Assertion Element if the ValueType corresponds to a SAML Assertion
// (or is empty)
//
if (WSConstants.WSS_SAML_KI_VALUE_TYPE.equals(valueType)
|| WSConstants.WSS_SAML2_KI_VALUE_TYPE.equals(valueType)
|| "".equals(valueType)
|| valueType == null) {
foundElement =
XMLUtils.findSAMLAssertionElementById(
doc.getDocumentElement(), idToMatch
);
if (foundElement != null) {
if (context != null) {
if (foundElement.hasAttributeNS(null, "ID")
&& idToMatch.equals(foundElement.getAttributeNS(null, "ID"))) {
context.setIdAttributeNS(foundElement, null, "ID");
}
if (foundElement.hasAttributeNS(null, "AssertionID")
&& idToMatch.equals(foundElement.getAttributeNS(null, "AssertionID"))) {
context.setIdAttributeNS(foundElement, null, "AssertionID");
}
}
return foundElement;
}
}
return null;
}
/**
* Get the DOM element(s) that correspond to the given localname/namespace.
* @param localname The localname of the Element(s)
* @param namespace The namespace of the Element(s)
* @return the located element(s)
* @throws WSSecurityException
*/
public List getElements(
String localname, String namespace
) throws WSSecurityException {
//
// Try the SOAP Body first
//
Element bodyElement = getSOAPBody();
if (WSConstants.ELEM_BODY.equals(localname) && bodyElement.getNamespaceURI().equals(namespace)) {
return Collections.singletonList(bodyElement);
}
return XMLUtils.findElements(doc.getDocumentElement(), localname, namespace);
}
/**
* Get the SOAP Body
*/
public Element getSOAPBody() {
return WSSecurityUtil.findBodyElement(doc);
}
}
