103 lines
3.9 KiB
Java
103 lines
3.9 KiB
Java
/*
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* Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @library /test/lib
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* @build jdk.test.lib.RandomFactory
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* @run main ModPow65537
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* @bug 4891312 8074460 8078672
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* @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)
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* @author Andreas Sterbenz
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* @key randomness
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*/
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import java.math.BigInteger;
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import java.security.*;
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import java.security.spec.*;
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import java.util.Random;
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import jdk.test.lib.RandomFactory;
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public class ModPow65537 {
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public static void main(String[] args) throws Exception {
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// SunRsaSign uses BigInteger internally
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KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");
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kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65537)));
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KeyPair kp = kpg.generateKeyPair();
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testSigning(kp);
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kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65539)));
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kp = kpg.generateKeyPair();
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testSigning(kp);
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kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(3)));
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kp = kpg.generateKeyPair();
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testSigning(kp);
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// basic known answer test
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BigInteger base = new BigInteger("19058071224156864789844466979330892664777520457048234786139035643344145635582");
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BigInteger mod = new BigInteger("75554098474976067521257305210610421240510163914613117319380559667371251381587");
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BigInteger exp1 = BigInteger.valueOf(65537);
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BigInteger exp2 = BigInteger.valueOf(75537);
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BigInteger exp3 = new BigInteger("13456870775607312149");
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BigInteger res1 = new BigInteger("5770048609366563851320890693196148833634112303472168971638730461010114147506");
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BigInteger res2 = new BigInteger("63446979364051087123350579021875958137036620431381329472348116892915461751531");
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BigInteger res3 = new BigInteger("39016891919893878823999350081191675846357272199067075794096200770872982089502");
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if (base.modPow(exp1, mod).equals(res1) == false) {
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throw new Exception("Error using " + exp1);
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}
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if (base.modPow(exp2, mod).equals(res2) == false) {
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throw new Exception("Error using " + exp2);
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}
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if (base.modPow(exp3, mod).equals(res3) == false) {
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throw new Exception("Error using " + exp3);
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}
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System.out.println("Passed");
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}
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private static void testSigning(KeyPair kp) throws Exception {
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System.out.println(kp.getPublic());
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byte[] data = new byte[1024];
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Random random = RandomFactory.getRandom();
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random.nextBytes(data);
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Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");
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sig.initSign(kp.getPrivate());
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sig.update(data);
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byte[] sigBytes = sig.sign();
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sig.initVerify(kp.getPublic());
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sig.update(data);
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if (sig.verify(sigBytes) == false) {
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throw new Exception("signature verification failed");
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}
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System.out.println("OK");
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}
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}
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