/*
* Copyright 1999-2004 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.
*
*/
package com.sun.org.apache.xml.internal.security.utils;
import java.math.BigInteger;
import java.util.HashMap;
import com.sun.org.apache.xml.internal.security.exceptions.Base64DecodingException;
import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
/**
* This is the base class to all Objects which have a direct 1:1 mapping to an
* Element in a particular namespace.
*
* @author $Author: mullan $
*/
public abstract class ElementProxy {
/** {@link java.util.logging} logging facility */
static java.util.logging.Logger log =
java.util.logging.Logger.getLogger(ElementProxy.class.getName());
//J-
/** The element has been created by the code **/
public static final int MODE_CREATE = 0;
/** The element has been readed from a DOM tree by the code **/
public static final int MODE_PROCESS = 1;
/** The element isn't known if it is readen or created **/
public static final int MODE_UNKNOWN = 2;
/** The element is going to be signed **/
public static final int MODE_SIGN = MODE_CREATE;
/** The element is going to be verified **/
public static final int MODE_VERIFY = MODE_PROCESS;
/** The element is going to be encrypted **/
public static final int MODE_ENCRYPT = MODE_CREATE;
/** The element is going to be decrypted **/
public static final int MODE_DECRYPT = MODE_PROCESS;
protected int _state = MODE_UNKNOWN;
//J+
/**
* Returns the namespace of the Elements of the sub-class.
*
* @return the namespace of the Elements of the sub-class.
*/
public abstract String getBaseNamespace();
/**
* Returns the localname of the Elements of the sub-class.
*
* @return the localname of the Elements of the sub-class.
*/
public abstract String getBaseLocalName();
/** Field _constructionElement */
protected Element _constructionElement = null;
/** Field _baseURI */
protected String _baseURI = null;
/** Field _doc */
protected Document _doc = null;
/**
* Constructor ElementProxy
*
*/
public ElementProxy() {
this._doc = null;
this._state = ElementProxy.MODE_UNKNOWN;
this._baseURI = null;
this._constructionElement = null;
}
/**
* Constructor ElementProxy
*
* @param doc
*/
public ElementProxy(Document doc) {
this();
if (doc == null) {
throw new RuntimeException("Document is null");
}
this._doc = doc;
this._state = ElementProxy.MODE_CREATE;
this._constructionElement = ElementProxy.createElementForFamily(this._doc,
this.getBaseNamespace(), this.getBaseLocalName());
}
/**
* This method creates an Element in a given namespace with a given localname.
* It uses the {@link ElementProxy#getDefaultPrefix} method to decide whether
* a particular prefix is bound to that namespace.
* <BR />
* This method was refactored out of the constructor.
*
* @param doc
* @param namespace
* @param localName
* @return The element created.
*/
public static Element createElementForFamily(Document doc, String namespace,
String localName) {
//Element nscontext = XMLUtils.createDSctx(doc, "x", namespace);
Element result = null;
String prefix = ElementProxy.getDefaultPrefix(namespace);
if (namespace == null) {
result = doc.createElementNS(null, localName);
} else {
if ((prefix == null) || (prefix.length() == 0)) {
result = doc.createElementNS(namespace, localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns",
namespace);
} else {
result = doc.createElementNS(namespace, prefix + ":" + localName);
result.setAttributeNS(Constants.NamespaceSpecNS, "xmlns:" + prefix,
namespace);
}
}
return result;
}
/**
* Method setElement
*
* @param element
* @param BaseURI
* @throws XMLSecurityException
*/
public void setElement(Element element, String BaseURI)
throws XMLSecurityException {
if (element == null) {
throw new XMLSecurityException("ElementProxy.nullElement");
}
if (true) {
}
if (true) {
if (log.isLoggable(java.util.logging.Level.FINE)) log.log(java.util.logging.Level.FINE, "setElement(" + element.getTagName() + ", \"" + BaseURI + "\"");
}
this._doc = element.getOwnerDocument();
this._state = ElementProxy.MODE_PROCESS;
this._constructionElement = element;
this._baseURI = BaseURI;
}
/**
* Constructor ElementProxy
*
* @param element
* @param BaseURI
* @throws XMLSecurityException
*/
public ElementProxy(Element element, String BaseURI)
throws XMLSecurityException {
this();
if (element == null) {
throw new XMLSecurityException("ElementProxy.nullElement");
}
if (true) {
if (log.isLoggable(java.util.logging.Level.FINE)) log.log(java.util.logging.Level.FINE, "setElement(\"" + element.getTagName() + "\", \"" + BaseURI
+ "\")");
}
this._doc = element.getOwnerDocument();
this._state = ElementProxy.MODE_PROCESS;
this._constructionElement = element;
this._baseURI = BaseURI;
this.guaranteeThatElementInCorrectSpace();
}
/**
* Returns the Element which was constructed by the Object.
*
* @return the Element which was constructed by the Object.
*/
public final Element getElement() {
return this._constructionElement;
}
/**
* Returns the Element plus a leading and a trailing CarriageReturn Text node.
*
* @return the Element which was constructed by the Object.
*/
public final NodeList getElementPlusReturns() {
HelperNodeList nl = new HelperNodeList();
nl.appendChild(this._doc.createTextNode("\n"));
nl.appendChild(this.getElement());
nl.appendChild(this._doc.createTextNode("\n"));
return nl;
}
/**
* Method getDocument
*
* @return the Document where this element is contained.
*/
public Document getDocument() {
return this._doc;
}
/**
* Method getBaseURI
*
* @return the base uri of the namespace of this element
*/
public String getBaseURI() {
return this._baseURI;
}
/**
* Method guaranteeThatElementInCorrectSpace
*
* @throws XMLSecurityException
*/
public void guaranteeThatElementInCorrectSpace()
throws XMLSecurityException {
String localnameSHOULDBE = this.getBaseLocalName();
String namespaceSHOULDBE = this.getBaseNamespace();
String localnameIS = this._constructionElement.getLocalName();
String namespaceIS = this._constructionElement.getNamespaceURI();
if ( !localnameSHOULDBE.equals(localnameIS) ||
!namespaceSHOULDBE.equals(namespaceIS)) {
Object exArgs[] = { namespaceIS +":"+ localnameIS,
namespaceSHOULDBE +":"+ localnameSHOULDBE};
throw new XMLSecurityException("xml.WrongElement", exArgs);
}
}
/**
* Method setVal
*
* @param bi
* @param localname
*/
public void addBigIntegerElement(BigInteger bi, String localname) {
if (bi != null) {
Element e = XMLUtils.createElementInSignatureSpace(this._doc,
localname);
Base64.fillElementWithBigInteger(e, bi);
this._constructionElement.appendChild(e);
XMLUtils.addReturnToElement(this._constructionElement);
}
}
/**
* Method addBase64Element
*
* @param bytes
* @param localname
*/
public void addBase64Element(byte[] bytes, String localname) {
if (bytes != null) {
Element e = Base64.encodeToElement(this._doc, localname, bytes);
this._constructionElement.appendChild(e);
this._constructionElement.appendChild(this._doc.createTextNode("\n"));
}
}
/**
* Method addTextElement
*
* @param text
* @param localname
*/
public void addTextElement(String text, String localname) {
Element e = XMLUtils.createElementInSignatureSpace(this._doc, localname);
Text t = this._doc.createTextNode(text);
e.appendChild(t);
this._constructionElement.appendChild(e);
XMLUtils.addReturnToElement(this._constructionElement);
}
/**
* Method addBase64Text
*
* @param bytes
*/
public void addBase64Text(byte[] bytes) {
if (bytes != null) {
Text t = this._doc.createTextNode("\n" + Base64.encode(bytes) + "\n");
this._constructionElement.appendChild(t);
}
}
/**
* Method addText
*
* @param text
*/
public void addText(String text) {
if (text != null) {
Text t = this._doc.createTextNode(text);
this._constructionElement.appendChild(t);
}
}
/**
* Method getVal
*
* @param localname
* @param namespace
* @return The biginter contained in the given element
* @throws Base64DecodingException
*/
public BigInteger getBigIntegerFromChildElement(
String localname, String namespace) throws Base64DecodingException {
return Base64.decodeBigIntegerFromText(
XMLUtils.selectNodeText(this._constructionElement.getFirstChild(),
namespace,localname,0));
}
/**
* Method getBytesFromChildElement
*
* @param localname
* @param namespace
* @return the bytes
* @throws XMLSecurityException
*/
public byte[] getBytesFromChildElement(String localname, String namespace)
throws XMLSecurityException {
Element e =
XMLUtils.selectNode(
this._constructionElement.getFirstChild(),
namespace,
localname,
0);
return Base64.decode(e);
}
/**
* Method getTextFromChildElement
*
* @param localname
* @param namespace
* @return the Text of the textNode
*/
public String getTextFromChildElement(String localname, String namespace) {
Text t =
(Text) XMLUtils.selectNode(
this._constructionElement.getFirstChild(),
namespace,
localname,
0).getFirstChild();
return t.getData();
}
/**
* Method getBytesFromTextChild
*
* @return The base64 bytes from the first text child of this element
* @throws XMLSecurityException
*/
public byte[] getBytesFromTextChild() throws XMLSecurityException {
Text t = (Text)this._constructionElement.getFirstChild();
return Base64.decode(t.getData());
}
/**
* Method getTextFromTextChild
*
* @return the Text obtained concatening all the the text nodes of this element
*/
public String getTextFromTextChild() {
return XMLUtils.getFullTextChildrenFromElement(this._constructionElement);
}
/**
* Method length
*
* @param namespace
* @param localname
* @return the number of elements {namespace}:localname under this element
*/
public int length(String namespace, String localname) {
int number=0;
Node sibling=this._constructionElement.getFirstChild();
while (sibling!=null) {
if (localname.equals(sibling.getLocalName())
&&
namespace.equals(sibling.getNamespaceURI())) {
number++;
}
sibling=sibling.getNextSibling();
}
return number;
}
/**
* Adds an xmlns: definition to the Element. This can be called as follows:
*
* <PRE>
* // set namespace with ds prefix
* xpathContainer.setXPathNamespaceContext("ds", "http://www.w3.org/2000/09/xmldsig#");
* xpathContainer.setXPathNamespaceContext("xmlns:ds", "http://www.w3.org/2000/09/xmldsig#");
* </PRE>
*
* @param prefix
* @param uri
* @throws XMLSecurityException
*/
public void setXPathNamespaceContext(String prefix, String uri)
throws XMLSecurityException {
String ns;
if ((prefix == null) || (prefix.length() == 0)) {
throw new XMLSecurityException("defaultNamespaceCannotBeSetHere");
} else if (prefix.equals("xmlns")) {
throw new XMLSecurityException("defaultNamespaceCannotBeSetHere");
} else if (prefix.startsWith("xmlns:")) {
ns = prefix;//"xmlns:" + prefix.substring("xmlns:".length());
} else {
ns = "xmlns:" + prefix;
}
Attr a = this._constructionElement.getAttributeNodeNS(Constants.NamespaceSpecNS, ns);
if (a != null) {
if (!a.getNodeValue().equals(uri)) {
Object exArgs[] = { ns,
this._constructionElement.getAttributeNS(null,
ns) };
throw new XMLSecurityException("namespacePrefixAlreadyUsedByOtherURI",
exArgs);
}
return;
}
this._constructionElement.setAttributeNS(Constants.NamespaceSpecNS, ns,
uri);
}
/** Field _prefixMappings */
static HashMap _prefixMappings = new HashMap();
/**
* Method setDefaultPrefix
*
* @param namespace
* @param prefix
* @throws XMLSecurityException
*/
public static void setDefaultPrefix(String namespace, String prefix)
throws XMLSecurityException {
if (ElementProxy._prefixMappings.containsValue(prefix)) {
Object storedNamespace=ElementProxy._prefixMappings.get(namespace);
if (!storedNamespace.equals(prefix)) {
Object exArgs[] = { prefix, namespace, storedNamespace };
throw new XMLSecurityException("prefix.AlreadyAssigned", exArgs);
}
}
ElementProxy._prefixMappings.put(namespace, prefix);
}
/**
* Method getDefaultPrefix
*
* @param namespace
* @return the default prefix bind to this element.
*/
public static String getDefaultPrefix(String namespace) {
String prefix = (String) ElementProxy._prefixMappings.get(namespace);
return prefix;
}
}
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