/*

 * Copyright (c) 2013, 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.

 *

 * 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.

 */

/*

 * Portions Copyright (c) 2013 IBM Corporation

 */

/*

 * @test

 * @bug 8014620

 * @summary Signature.getAlgorithm return null in special case

 * @run main/othervm SignatureGetAlgorithm

 * @author youdwei

 */

import java.security.*;

public class SignatureGetAlgorithm {

    public static void main(String[] args) throws Exception {

        Provider testProvider = new TestProvider();

        Security.addProvider(testProvider);

        Signature sig = Signature.getInstance("MySignatureAlg");

        String algorithm = sig.getAlgorithm();

        System.out.println("Algorithm Name: " + algorithm);

        if (algorithm == null) {

            throw new Exception("algorithm name should be 'MySignatureAlg'");

        }

    }

    public static class TestProvider extends Provider {

        TestProvider() {

            put("Signature.MySignatureAlg",

                "SignatureGetAlgorithm$MySignatureAlg");

        }

    }

    public static class MySignatureAlg extends Signature {

        public MySignatureAlg() {

            super(null);

        }

        MySignatureAlg(String s) {

            super(s);

        }

        @Override

        protected void engineInitVerify(PublicKey publicKey)

                throws InvalidKeyException {

        }

        @Override

        protected void engineInitSign(PrivateKey privateKey)

                throws InvalidKeyException {

        }

        @Override

        protected void engineUpdate(byte b) throws SignatureException {

        }

        @Override

        protected void engineUpdate(byte[] b, int off, int len)

                throws SignatureException {

        }

        @Override

        protected byte[] engineSign()

                throws SignatureException {

            return new byte[0];

        }

        @Override

        protected boolean engineVerify(byte[] sigBytes)

                throws SignatureException {

            return false;

        }

        @Override

        @Deprecated

        protected void engineSetParameter(String param, Object value)

                throws InvalidParameterException {

        }

        @Override

        @Deprecated

        protected Object engineGetParameter(String param)

                throws InvalidParameterException {

            return null;

        }

    }

}