ReinitSignature.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 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 4856966
 * @summary test that reinitializing Signatures works correctly
 * @author Andreas Sterbenz
 * @library ..
 * @key randomness
 */

import java.util.*;

import java.security.*;

public class ReinitSignature extends PKCS11Test {

    public static void main(String[] args) throws Exception {
        main(new ReinitSignature());
    }

    public void main(Provider p) throws Exception {
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", p);
        kpg.initialize(512);
        KeyPair kp = kpg.generateKeyPair();
        PrivateKey privateKey = kp.getPrivate();
        PublicKey publicKey = kp.getPublic();
        Signature sig = Signature.getInstance("MD5withRSA", p);
        byte[] data = new byte[10 * 1024];
        new Random().nextBytes(data);
        sig.initSign(privateKey);
        sig.initSign(privateKey);
        sig.update(data);
        sig.initSign(privateKey);
        sig.update(data);
        byte[] signature = sig.sign();
        sig.update(data);
        sig.initSign(privateKey);
        sig.update(data);
        sig.sign();
        sig.sign();
        sig.initSign(privateKey);
        sig.sign();

        System.out.println("All tests passed");
    }

}