/*

 * Copyright (c) 2015, 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.

 */

import java.io.Serializable;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.Signature;

import java.security.SignedObject;

/*

 * @test

 * @bug 8050374

 * @summary Checks if a signed object is a copy of an original object

 */

public class Copy {

    private static final String DSA = "DSA";

    private static final int KEY_SIZE = 512;

    private static final int MAGIC = 123;

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

        KeyPairGenerator kg = KeyPairGenerator.getInstance(DSA);

        kg.initialize(KEY_SIZE);

        KeyPair kp = kg.genKeyPair();

        Signature signature = Signature.getInstance(DSA);

        Test original = new Test();

        SignedObject so = new SignedObject(original, kp.getPrivate(),

                signature);

        System.out.println("Signature algorithm: " + so.getAlgorithm());

        signature = Signature.getInstance(DSA, "SUN");

        if (!so.verify(kp.getPublic(), signature)) {

            throw new RuntimeException("Verification failed");

        }

        kg = KeyPairGenerator.getInstance(DSA);

        kg.initialize(KEY_SIZE);

        kp = kg.genKeyPair();

        if (so.verify(kp.getPublic(), signature)) {

            throw new RuntimeException("Unexpected success");

        }

        Object copy = so.getObject();

        if (!original.equals(copy)) {

            throw new RuntimeException("Signed object is not equal "

                    + "to original one: " + copy);

        }

        /*

         * The signed object is a copy of an original one.

         * Once the copy is made, further manipulation

         * of the original object shouldn't has any effect on the copy.

         */

        original.set(MAGIC - 1);

        copy = so.getObject();

        if (original.equals(copy)) {

            throw new RuntimeException("Signed object is not a copy "

                    + "of original one: " + copy);

        }

        System.out.println("Test passed");

    }

    private static class Test implements Serializable {

        private int number = MAGIC;

        public int get() {

            return number;

        }

        public void set(int magic) {

            this.number = magic;

        }

        @Override

        public int hashCode() {

            return number;

        }

        @Override

        public boolean equals(Object obj) {

            if (obj == null) {

                return false;

            }

            if (!(obj instanceof Test)) {

                return false;

            }

            Test other = (Test) obj;

            return number == other.number;

        }

        @Override

        public String toString() {

            return "" + number;

        }

    }

}