85 lines
3.0 KiB
Java
85 lines
3.0 KiB
Java
/*
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* Copyright (c) 2011, 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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* @bug 6738532
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* @summary Check EllipticCurve.equals() does not compare seed value of curve.
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* @author Mike StJohns
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* @key randomness
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*/
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import java.security.spec.*;
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import java.math.BigInteger;
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import java.util.Random;
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public class EllipticCurveMatch {
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static String primeP256 =
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"0FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF";
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static String aP256 =
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"0FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC";
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static String bP256 =
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"05AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B";
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static String seedP256 =
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"0C49D360886E704936A6678E1139D26B7819F7E90";
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private static EllipticCurve addSeedToCurve(EllipticCurve curve)
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{
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Random rand = new Random();
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byte[] seed = new byte[12];
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rand.nextBytes(seed);
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return new EllipticCurve (curve.getField(), curve.getA(), curve.getB(),
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seed);
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}
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private static EllipticCurve getP256Curve()
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{
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ECFieldFp field = new ECFieldFp(new BigInteger (primeP256,16));
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BigInteger a = new BigInteger (aP256, 16);
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BigInteger b = new BigInteger (bP256, 16);
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return new EllipticCurve (field, a, b);
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}
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public static void main (String[] argv) throws Exception {
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EllipticCurve firstCurve = getP256Curve();
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EllipticCurve secondCurve = addSeedToCurve(firstCurve);
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EllipticCurve thirdCurve = addSeedToCurve(firstCurve);
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if (!firstCurve.equals(firstCurve))
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throw new Exception("Original curve doesn't equal itself");
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if (!firstCurve.equals(secondCurve))
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throw new Exception ("Original curve doesn't equal seeded curve");
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if (!secondCurve.equals(secondCurve))
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throw new Exception ("Seeded curve doesn't equal itself");
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if (!secondCurve.equals(thirdCurve))
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throw new Exception ("Seeded curve doesn't equal differently " +
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"seeded curve");
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System.out.println("Curve equals test passed");
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}
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}
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