/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/**

 * 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 (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * $Id: DOMCanonicalXMLC14NMethod.java 1854026 2019-02-21 09:30:01Z coheigea $

 */

package org.jcp.xml.dsig.internal.dom;

import javax.xml.crypto.*;

import javax.xml.crypto.dsig.*;

import javax.xml.crypto.dsig.spec.TransformParameterSpec;

import java.security.InvalidAlgorithmParameterException;

import com.sun.org.apache.xml.internal.security.c14n.Canonicalizer;

import com.sun.org.apache.xml.internal.security.c14n.InvalidCanonicalizerException;

/**

 * DOM-based implementation of CanonicalizationMethod for Canonical XML

 * (with or without comments). Uses Apache XML-Sec Canonicalizer.

 *

 */

public final class DOMCanonicalXMLC14NMethod extends ApacheCanonicalizer {

    public void init(TransformParameterSpec params)

        throws InvalidAlgorithmParameterException {

        if (params != null) {

            throw new InvalidAlgorithmParameterException("no parameters " +

                "should be specified for Canonical XML C14N algorithm");

        }

    }

    public Data transform(Data data, XMLCryptoContext xc)

        throws TransformException {

        // ignore comments if dereferencing same-document URI that requires

        // you to omit comments, even if the Transform says otherwise -

        // this is to be compliant with section 4.3.3.3 of W3C Rec.

        if (data instanceof DOMSubTreeData) {

            DOMSubTreeData subTree = (DOMSubTreeData) data;

            if (subTree.excludeComments()) {

                try {

                    apacheCanonicalizer = Canonicalizer.getInstance

                        (CanonicalizationMethod.INCLUSIVE);

                    boolean secVal = Utils.secureValidation(xc);

                    apacheCanonicalizer.setSecureValidation(secVal);

                } catch (InvalidCanonicalizerException ice) {

                    throw new TransformException

                        ("Couldn't find Canonicalizer for: " +

                         CanonicalizationMethod.INCLUSIVE + ": " +

                         ice.getMessage(), ice);

                }

            }

        }

        return canonicalize(data, xc);

    }

}