/**
 * 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.
 */
package org.apache.xml.security.test.secure_val;

import java.io.File;

import org.apache.xml.security.signature.XMLSignature;
import org.apache.xml.security.signature.XMLSignatureException;
import org.apache.xml.security.test.interop.InteropTestBase;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.XMLUtils;
import org.w3c.dom.Element;


/**
 * This is a test for a wrapping attack.
 */
public class WrappingAttackTest extends InteropTestBase {

    /** {@link org.apache.commons.logging} logging facility */
    static org.apache.commons.logging.Log log = 
        org.apache.commons.logging.LogFactory.getLog(WrappingAttackTest.class.getName());

    static {
        org.apache.xml.security.Init.init();
    }
    
    public WrappingAttackTest() {
        super();
    }

    @org.junit.Test
    public void testWrappingAttack() throws Exception {
        boolean success = 
            readAndVerifySignature(
                "src/test/resources/at/iaik/ixsil/coreFeatures/signatures", 
                "manifestSignatureWrapping.xml"
            );

        assertTrue(success);
        try {
            readAndVerifySignatureAndSetManifest(
                "src/test/resources/at/iaik/ixsil/coreFeatures/signatures", 
                "manifestSignatureWrapping.xml"
            );
            fail("Failure expected when secure validation is enabled");
        } catch (XMLSignatureException ex) {
            assertTrue(ex.getMessage().contains("no XMLSignatureInput"));
        }
    }

    private boolean readAndVerifySignature(
        String directory, String file
    ) throws Exception {
        String basedir = System.getProperty("basedir");
        if (basedir != null && !"".equals(basedir)) {
            directory = basedir + "/" + directory;
        }

        File f = new File(directory + "/" + file);

        javax.xml.parsers.DocumentBuilder db = XMLUtils.createDocumentBuilder(false, false);
        org.w3c.dom.Document doc = db.parse(f);

        Element sigElement =
            (Element) doc.getElementsByTagNameNS(Constants.SignatureSpecNS,
                                                 Constants._TAG_SIGNATURE).item(0);
        XMLSignature signature = new XMLSignature(sigElement, f.toURI().toURL().toString());
        return signature.checkSignatureValue(signature.getKeyInfo().getPublicKey());
    }
    
    private boolean readAndVerifySignatureAndSetManifest(
        String directory, String file
    ) throws Exception {
        String basedir = System.getProperty("basedir");
        if (basedir != null && !"".equals(basedir)) {
            directory = basedir + "/" + directory;
        }

        File f = new File(directory + "/" + file);

        javax.xml.parsers.DocumentBuilder db = XMLUtils.createDocumentBuilder(false, false);
        org.w3c.dom.Document doc = db.parse(f);

        Element sigElement =
            (Element) doc.getElementsByTagNameNS(Constants.SignatureSpecNS,
                                                 Constants._TAG_SIGNATURE).item(0);
        
        Element manifestElement =
            (Element) doc.getElementsByTagName("Manifest").item(0);
        manifestElement.setIdAttribute("Id", true);
        
        XMLSignature signature = new XMLSignature(sigElement, f.toURI().toURL().toString(), true);
        return signature.checkSignatureValue(signature.getKeyInfo().getPublicKey());
    }

}
