/*

 * Copyright (c) 2003, 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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 */

/**

 * @test

 * @bug 4955844

 * @summary ensure that the NONEwithRSA adapter works correctly

 * @author Andreas Sterbenz

 * @key randomness

 */

import java.util.*;

import java.security.*;

import javax.crypto.*;

public class NONEwithRSA {

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

//      showProvider(Security.getProvider("SUN"));

        Random random = new Random();

        byte[] b = new byte[16];

        random.nextBytes(b);

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

        kpg.initialize(512);

        KeyPair kp = kpg.generateKeyPair();

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

        sig.initSign(kp.getPrivate());

        System.out.println("Provider: " + sig.getProvider());

        sig.update(b);

        byte[] sb = sig.sign();

        sig.initVerify(kp.getPublic());

        sig.update(b);

        if (sig.verify(sb) == false) {

            throw new Exception("verification failed");

        }

        Cipher c = Cipher.getInstance("RSA/ECB/PKCS1Padding");

        c.init(Cipher.DECRYPT_MODE, kp.getPublic());

        byte[] dec = c.doFinal(sb);

        if (Arrays.equals(dec, b) == false) {

            throw new Exception("decryption failed");

        }

        sig = Signature.getInstance("NONEwithRSA", "SunJCE");

        sig.initSign(kp.getPrivate());

        sig = Signature.getInstance("NONEwithRSA", Security.getProvider("SunJCE"));

        sig.initSign(kp.getPrivate());

        try {

            Signature.getInstance("NONEwithRSA", "SUN");

            throw new Exception("call succeeded");

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        }

        System.out.println("OK");

    }

    private static void showProvider(Provider p) {

        System.out.println(p);

        for (Iterator t = p.getServices().iterator(); t.hasNext(); ) {

            System.out.println(t.next());

        }

    }

}