| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2005 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 (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * $Id: DOMTransform.java,v 1.2 2008/07/24 15:20:32 mullan Exp $ |
| */ |
| package org.jcp.xml.dsig.internal.dom; |
| |
| import java.io.OutputStream; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.Provider; |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| |
| import javax.xml.crypto.*; |
| import javax.xml.crypto.dsig.*; |
| import javax.xml.crypto.dom.DOMCryptoContext; |
| import javax.xml.crypto.dsig.dom.DOMSignContext; |
| import javax.xml.crypto.dsig.spec.TransformParameterSpec; |
| |
| /** |
| * DOM-based abstract implementation of Transform. |
| * |
| * @author Sean Mullan |
| */ |
| public class DOMTransform extends DOMStructure implements Transform { |
| |
| protected TransformService spi; |
| |
| /** |
| * Creates a <code>DOMTransform</code>. |
| * |
| * @param spi the TransformService |
| */ |
| public DOMTransform(TransformService spi) { |
| this.spi = spi; |
| } |
| |
| /** |
| * Creates a <code>DOMTransform</code> from an element. This constructor |
| * invokes the abstract {@link #unmarshalParams unmarshalParams} method to |
| * unmarshal any algorithm-specific input parameters. |
| * |
| * @param transElem a Transform element |
| */ |
| public DOMTransform(Element transElem, XMLCryptoContext context, |
| Provider provider) throws MarshalException { |
| String algorithm = DOMUtils.getAttributeValue(transElem, "Algorithm"); |
| try { |
| spi = TransformService.getInstance(algorithm, "DOM"); |
| } catch (NoSuchAlgorithmException e1) { |
| try { |
| spi = TransformService.getInstance(algorithm, "DOM", provider); |
| } catch (NoSuchAlgorithmException e2) { |
| throw new MarshalException(e2); |
| } |
| } |
| try { |
| spi.init(new javax.xml.crypto.dom.DOMStructure(transElem), context); |
| } catch (InvalidAlgorithmParameterException iape) { |
| throw new MarshalException(iape); |
| } |
| } |
| |
| public final AlgorithmParameterSpec getParameterSpec() { |
| return spi.getParameterSpec(); |
| } |
| |
| public final String getAlgorithm() { |
| return spi.getAlgorithm(); |
| } |
| |
| /** |
| * This method invokes the abstract {@link #marshalParams marshalParams} |
| * method to marshal any algorithm-specific parameters. |
| */ |
| public void marshal(Node parent, String dsPrefix, DOMCryptoContext context) |
| throws MarshalException { |
| Document ownerDoc = DOMUtils.getOwnerDocument(parent); |
| |
| Element transformElem = null; |
| if (parent.getLocalName().equals("Transforms")) { |
| transformElem = DOMUtils.createElement |
| (ownerDoc, "Transform", XMLSignature.XMLNS, dsPrefix); |
| } else { |
| transformElem = DOMUtils.createElement |
| (ownerDoc, "CanonicalizationMethod", XMLSignature.XMLNS, dsPrefix); |
| } |
| DOMUtils.setAttribute(transformElem, "Algorithm", getAlgorithm()); |
| |
| spi.marshalParams |
| (new javax.xml.crypto.dom.DOMStructure(transformElem), context); |
| |
| parent.appendChild(transformElem); |
| } |
| |
| /** |
| * Transforms the specified data using the underlying transform algorithm. |
| * |
| * @param data the data to be transformed |
| * @param sc the <code>XMLCryptoContext</code> containing |
| * additional context (may be <code>null</code> if not applicable) |
| * @return the transformed data |
| * @throws NullPointerException if <code>data</code> is <code>null</code> |
| * @throws XMLSignatureException if an unexpected error occurs while |
| * executing the transform |
| */ |
| public Data transform(Data data, XMLCryptoContext xc) |
| throws TransformException { |
| return spi.transform(data, xc); |
| } |
| |
| /** |
| * Transforms the specified data using the underlying transform algorithm. |
| * |
| * @param data the data to be transformed |
| * @param sc the <code>XMLCryptoContext</code> containing |
| * additional context (may be <code>null</code> if not applicable) |
| * @param os the <code>OutputStream</code> that should be used to write |
| * the transformed data to |
| * @return the transformed data |
| * @throws NullPointerException if <code>data</code> is <code>null</code> |
| * @throws XMLSignatureException if an unexpected error occurs while |
| * executing the transform |
| */ |
| public Data transform(Data data, XMLCryptoContext xc, OutputStream os) |
| throws TransformException { |
| return spi.transform(data, xc, os); |
| } |
| |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (!(o instanceof Transform)) { |
| return false; |
| } |
| Transform otransform = (Transform) o; |
| |
| return (getAlgorithm().equals(otransform.getAlgorithm()) && |
| DOMUtils.paramsEqual |
| (getParameterSpec(), otransform.getParameterSpec())); |
| } |
| |
| /** |
| * Transforms the specified data using the underlying transform algorithm. |
| * This method invokes the {@link #marshal marshal} method and passes it |
| * the specified <code>DOMSignContext</code> before transforming the data. |
| * |
| * @param data the data to be transformed |
| * @param sc the <code>XMLCryptoContext</code> containing |
| * additional context (may be <code>null</code> if not applicable) |
| * @param context the marshalling context |
| * @return the transformed data |
| * @throws MarshalException if an exception occurs while marshalling |
| * @throws NullPointerException if <code>data</code> or <code>context</code> |
| * is <code>null</code> |
| * @throws XMLSignatureException if an unexpected error occurs while |
| * executing the transform |
| */ |
| Data transform(Data data, XMLCryptoContext xc, DOMSignContext context) |
| throws MarshalException, TransformException { |
| marshal(context.getParent(), |
| DOMUtils.getSignaturePrefix(context), context); |
| return transform(data, xc); |
| } |
| } |