/**
 * 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.dom.secure_val;

import static org.junit.Assert.*;

import java.io.File;

import org.apache.xml.security.signature.XMLSignature;
import org.apache.xml.security.signature.XMLSignatureException;
import org.apache.xml.security.test.dom.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 forbidden algorithm (MD5) when secure validation is enabled.
 */
public class ForbiddenAlgorithmTest extends InteropTestBase {

    static org.slf4j.Logger LOG =
        org.slf4j.LoggerFactory.getLogger(ForbiddenAlgorithmTest.class);

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

    public ForbiddenAlgorithmTest() {
        super();
    }

    @org.junit.Test
    public void testMD5Digest() throws Exception {
        boolean success =
            readAndVerifySignature("src/test/resources/interop/c14n/Y2", "signature-joseph-exc.xml", false);

        assertTrue(success);

        try {
            readAndVerifySignature("src/test/resources/interop/c14n/Y2", "signature-joseph-exc.xml", true);
            fail("Failure expected when secure validation is enabled");
        } catch (XMLSignatureException ex) {
            String error = "It is forbidden to use algorithm http://www.w3.org/2001/04/xmldsig-more#md5 "
                + "when secure validation is enabled";
            assertTrue(ex.getMessage().equals(error));
        }
    }

    private boolean readAndVerifySignature(
        String directory, String file, boolean secValidation
    ) 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(), secValidation);
        return signature.checkSignatureValue(signature.getKeyInfo().getPublicKey());
    }

}