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