/*
* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* $Id: ApacheTransform.java,v 1.23 2005/09/15 14:29:03 mullan Exp $
*/
package org.jcp.xml.dsig.internal.dom;
import java.io.OutputStream;
import java.security.InvalidAlgorithmParameterException;
import java.security.spec.AlgorithmParameterSpec;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput;
import com.sun.org.apache.xml.internal.security.transforms.Transform;
import javax.xml.crypto.*;
import javax.xml.crypto.dom.DOMCryptoContext;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
/**
* This is a wrapper/glue class which invokes the Apache XML-Security
* Transform.
*
* @author Sean Mullan
* @author Erwin van der Koogh
*/
public abstract class ApacheTransform extends TransformService {
private static Logger log = Logger.getLogger("org.jcp.xml.dsig.internal.dom");
private Transform apacheTransform;
protected Document ownerDoc;
protected Element transformElem;
protected TransformParameterSpec params;
public final AlgorithmParameterSpec getParameterSpec() {
return params;
}
public void init(XMLStructure parent, XMLCryptoContext context)
throws InvalidAlgorithmParameterException {
if (context != null && !(context instanceof DOMCryptoContext)) {
throw new ClassCastException
("context must be of type DOMCryptoContext");
}
transformElem = (Element)
((javax.xml.crypto.dom.DOMStructure) parent).getNode();
ownerDoc = DOMUtils.getOwnerDocument(transformElem);
}
public void marshalParams(XMLStructure parent, XMLCryptoContext context)
throws MarshalException {
if (context != null && !(context instanceof DOMCryptoContext)) {
throw new ClassCastException
("context must be of type DOMCryptoContext");
}
transformElem = (Element)
((javax.xml.crypto.dom.DOMStructure) parent).getNode();
ownerDoc = DOMUtils.getOwnerDocument(transformElem);
}
public Data transform(Data data, XMLCryptoContext xc)
throws TransformException {
if (data == null) {
throw new NullPointerException("data must not be null");
}
return transformIt(data, xc, (OutputStream) null);
}
public Data transform(Data data, XMLCryptoContext xc, OutputStream os)
throws TransformException {
if (data == null) {
throw new NullPointerException("data must not be null");
}
if (os == null) {
throw new NullPointerException("output stream must not be null");
}
return transformIt(data, xc, os);
}
private Data transformIt(Data data, XMLCryptoContext xc, OutputStream os)
throws TransformException {
if (ownerDoc == null) {
throw new TransformException("transform must be marshalled");
}
if (apacheTransform == null) {
try {
apacheTransform = Transform.getInstance
(ownerDoc, getAlgorithm(), transformElem.getChildNodes());
apacheTransform.setElement(transformElem, xc.getBaseURI());
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Created transform for algorithm: "
+ getAlgorithm());
}
} catch (Exception ex) {
throw new TransformException
("Couldn't find Transform for: " + getAlgorithm(), ex);
}
}
XMLSignatureInput in;
if (data instanceof ApacheData) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "ApacheData = true");
}
in = ((ApacheData) data).getXMLSignatureInput();
} else if (data instanceof NodeSetData) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "isNodeSet() = true");
}
if (data instanceof DOMSubTreeData) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "DOMSubTreeData = true");
}
DOMSubTreeData subTree = (DOMSubTreeData) data;
in = new XMLSignatureInput(subTree.getRoot());
in.setExcludeComments(subTree.excludeComments());
} else {
Set nodeSet =
Utils.toNodeSet(((NodeSetData) data).iterator());
in = new XMLSignatureInput(nodeSet);
}
} else {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "isNodeSet() = false");
}
try {
in = new XMLSignatureInput
(((OctetStreamData)data).getOctetStream());
} catch (Exception ex) {
throw new TransformException(ex);
}
}
try {
if (os != null) {
in = apacheTransform.performTransform(in, os);
if (!in.isNodeSet() && !in.isElement()) {
return null;
}
} else {
in = apacheTransform.performTransform(in);
}
if (in.isOctetStream()) {
return new ApacheOctetStreamData(in);
} else {
return new ApacheNodeSetData(in);
}
} catch (Exception ex) {
throw new TransformException(ex);
}
}
public final boolean isFeatureSupported(String feature) {
if (feature == null) {
throw new NullPointerException();
} else {
return false;
}
}
}