/*

 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.security.provider.certpath;

import java.security.cert.Certificate;

import java.security.cert.X509Certificate;

import java.security.cert.CertPathValidatorException;

import java.security.cert.PKIXCertPathChecker;

import java.util.Set;

import java.util.Collection;

import sun.security.util.Debug;

import sun.security.util.UntrustedCertificates;

/**

 * A <code>PKIXCertPathChecker</code> implementation to check whether a

 * specified certificate is distrusted.

 *

 * @see PKIXCertPathChecker

 * @see PKIXParameters

 */

public final class UntrustedChecker extends PKIXCertPathChecker {

    private static final Debug debug = Debug.getInstance("certpath");

    /**

     * Default Constructor

     */

    public UntrustedChecker() {

        // blank

    }

    @Override

    public void init(boolean forward) throws CertPathValidatorException {

        // Note that this class supports both forward and reverse modes.

    }

    @Override

    public boolean isForwardCheckingSupported() {

        // Note that this class supports both forward and reverse modes.

        return true;

    }

    @Override

    public Set<String> getSupportedExtensions() {

        return null;

    }

    @Override

    public void check(Certificate cert,

            Collection<String> unresolvedCritExts)

            throws CertPathValidatorException {

        X509Certificate currCert = (X509Certificate)cert;

        if (UntrustedCertificates.isUntrusted(currCert)) {

            if (debug != null) {

                debug.println("UntrustedChecker: untrusted certificate " +

                        currCert.getSubjectX500Principal());

            }

            throw new CertPathValidatorException(

                "Untrusted certificate: " + currCert.getSubjectX500Principal());

        }

    }

}