| /** |
| * 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. |
| */ |
| /* |
| * Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
| */ |
| package org.apache.jcp.xml.dsig.internal.dom; |
| |
| import java.io.OutputStream; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.Provider; |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| import org.w3c.dom.Element; |
| |
| import javax.xml.crypto.*; |
| import javax.xml.crypto.dsig.*; |
| |
| /** |
| * DOM-based abstract implementation of CanonicalizationMethod. |
| * |
| */ |
| public class DOMCanonicalizationMethod extends DOMTransform |
| implements CanonicalizationMethod { |
| |
| /** |
| * Creates a <code>DOMCanonicalizationMethod</code>. |
| * |
| * @param spi TransformService |
| */ |
| public DOMCanonicalizationMethod(TransformService spi) |
| throws InvalidAlgorithmParameterException |
| { |
| super(spi); |
| if (!(spi instanceof ApacheCanonicalizer) && !isC14Nalg(spi.getAlgorithm())) { |
| throw new InvalidAlgorithmParameterException("Illegal CanonicalizationMethod"); |
| } |
| } |
| |
| /** |
| * Creates a <code>DOMCanonicalizationMethod</code> from an element. It unmarshals any |
| * algorithm-specific input parameters. |
| * |
| * @param cmElem a CanonicalizationMethod element |
| */ |
| public DOMCanonicalizationMethod(Element cmElem, XMLCryptoContext context, |
| Provider provider) |
| throws MarshalException |
| { |
| super(cmElem, context, provider); |
| if (!(spi instanceof ApacheCanonicalizer) && !isC14Nalg(spi.getAlgorithm())) { |
| throw new MarshalException("Illegal CanonicalizationMethod"); |
| } |
| } |
| |
| /** |
| * Canonicalizes the specified data using the underlying canonicalization |
| * algorithm. This is a convenience method that is equivalent to invoking |
| * the {@link #transform transform} method. |
| * |
| * @param data the data to be canonicalized |
| * @param xc the <code>XMLCryptoContext</code> containing |
| * additional context (may be <code>null</code> if not applicable) |
| * @return the canonicalized data |
| * @throws NullPointerException if <code>data</code> is <code>null</code> |
| * @throws TransformException if an unexpected error occurs while |
| * canonicalizing the data |
| */ |
| public Data canonicalize(Data data, XMLCryptoContext xc) |
| throws TransformException |
| { |
| return transform(data, xc); |
| } |
| |
| public Data canonicalize(Data data, XMLCryptoContext xc, OutputStream os) |
| throws TransformException |
| { |
| return transform(data, xc, os); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (!(o instanceof CanonicalizationMethod)) { |
| return false; |
| } |
| CanonicalizationMethod ocm = (CanonicalizationMethod)o; |
| |
| return getAlgorithm().equals(ocm.getAlgorithm()) && |
| DOMUtils.paramsEqual(getParameterSpec(), ocm.getParameterSpec()); |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = 17; |
| result = 31 * result + getAlgorithm().hashCode(); |
| AlgorithmParameterSpec spec = getParameterSpec(); |
| if (spec != null) { |
| result = 31 * result + spec.hashCode(); |
| } |
| |
| return result; |
| } |
| |
| private static boolean isC14Nalg(String alg) { |
| return isInclusiveC14Nalg(alg) || isExclusiveC14Nalg(alg) || isC14N11alg(alg); |
| } |
| |
| private static boolean isInclusiveC14Nalg(String alg) { |
| return alg.equals(CanonicalizationMethod.INCLUSIVE) |
| || alg.equals(CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS); |
| } |
| |
| private static boolean isExclusiveC14Nalg(String alg) { |
| return alg.equals(CanonicalizationMethod.EXCLUSIVE) |
| || alg.equals(CanonicalizationMethod.EXCLUSIVE_WITH_COMMENTS); |
| } |
| |
| private static boolean isC14N11alg(String alg) { |
| return alg.equals(DOMCanonicalXMLC14N11Method.C14N_11) |
| || alg.equals(DOMCanonicalXMLC14N11Method.C14N_11_WITH_COMMENTS); |
| } |
| } |