Quelle ModPow65537.java Sprache: JAVA

/*
* Copyright (c) 2003, 2017, 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.
*/

/*
* @test
* @library /test/lib
* @build jdk.test.lib.RandomFactory
* @run main ModPow65537
* @bug 4891312 8074460 8078672
* @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)
* @author Andreas Sterbenz
* @key randomness
*/

import java.math.BigInteger;

import java.security.*;
import java.security.spec.*;
import java.util.Random;
import jdk.test.lib.RandomFactory;

public class ModPow65537 {

    public static void main(String[] args) throws Exception {
        // SunRsaSign uses BigInteger internally
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");
        kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65537)));
        KeyPair kp = kpg.generateKeyPair();
        testSigning(kp);

        kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65539)));
        kp = kpg.generateKeyPair();
        testSigning(kp);

        kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(3)));
        kp = kpg.generateKeyPair();
        testSigning(kp);

        // basic known answer test
        BigInteger base = new BigInteger("19058071224156864789844466979330892664777520457048234786139035643344145635582");
        BigInteger mod  = new BigInteger("75554098474976067521257305210610421240510163914613117319380559667371251381587");
        BigInteger exp1 = BigInteger.valueOf(65537);
        BigInteger exp2 = BigInteger.valueOf(75537);
        BigInteger exp3 = new BigInteger("13456870775607312149");

        BigInteger res1 = new BigInteger("5770048609366563851320890693196148833634112303472168971638730461010114147506");
        BigInteger res2 = new BigInteger("63446979364051087123350579021875958137036620431381329472348116892915461751531");
        BigInteger res3 = new BigInteger("39016891919893878823999350081191675846357272199067075794096200770872982089502");

        if (base.modPow(exp1, mod).equals(res1) == false) {
            throw new Exception("Error using " + exp1);
        }
        if (base.modPow(exp2, mod).equals(res2) == false) {
            throw new Exception("Error using " + exp2);
        }
        if (base.modPow(exp3, mod).equals(res3) == false) {
            throw new Exception("Error using " + exp3);
        }

        System.out.println("Passed");
    }

    private static void testSigning(KeyPair kp) throws Exception {
        System.out.println(kp.getPublic());
        byte[] data = new byte[1024];
        Random random = RandomFactory.getRandom();
        random.nextBytes(data);

        Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");
        sig.initSign(kp.getPrivate());
        sig.update(data);
        byte[] sigBytes = sig.sign();

        sig.initVerify(kp.getPublic());
        sig.update(data);
        if (sig.verify(sigBytes) == false) {
            throw new Exception("signature verification failed");
        }
        System.out.println("OK");
    }

}

quality89%

¤ Dauer der Verarbeitung: 0.10 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.