/*

 * Copyright (c) 2011, 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.

 *

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 * questions.

 */

/*

 * @test

 * @bug 7081411

 * @summary DSA keypair generation affected by Solaris bug

 * @modules java.base/sun.security.provider

 */

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.Signature;

import sun.security.provider.DSAPrivateKey;

public class SolarisShortDSA {

    static byte[] data = new byte[0];

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

        for (int i=0; i<10000; i++) {

            KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");

            KeyPair kp = kpg.generateKeyPair();

            DSAPrivateKey dpk = (DSAPrivateKey)kp.getPrivate();

            int len = dpk.getX().bitLength();

            if (len <= 152) {

                if (!use(kp)) {

                    String os = System.getProperty("os.name");

                    // Solaris bug, update the following line once it's fixed

                    if (os.equals("SunOS")) {

                        throw new IllegalStateException(

                                "Don't panic. This is a Solaris bug");

                    } else {

                        throw new RuntimeException("Real test failure");

                    }

                }

                break;

            }

        }

    }

    static boolean use(KeyPair kp) throws Exception {

        Signature sig = Signature.getInstance("SHA1withDSA");

        sig.initSign(kp.getPrivate());

        sig.update(data);

        byte[] signed = sig.sign();

        Signature sig2 = Signature.getInstance("SHA1withDSA");

        sig2.initVerify(kp.getPublic());

        sig2.update(data);

        return sig2.verify(signed);

   }

}