| /* |
| * Copyright (c) 2016, 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 8072452 |
| * @summary Support DHE sizes up to 8192-bits and DSA sizes up to 3072-bits |
| */ |
| |
| import java.math.BigInteger; |
| |
| import java.security.*; |
| import javax.crypto.*; |
| import javax.crypto.interfaces.*; |
| import javax.crypto.spec.*; |
| |
| public class SupportedDHKeys { |
| |
| /* |
| * Sizes and values for various lengths. |
| */ |
| private enum SupportedKeySize { |
| dhp512(512), dhp768(768), dhp832(832), |
| dhp1024(1024), dhp1536(1536), dhp2048(2048), |
| dhp3072(3072), dhp4096(4096), dhp6144(6144), |
| dhp8192(8192); |
| |
| final int primeSize; |
| |
| SupportedKeySize(int primeSize) { |
| this.primeSize = primeSize; |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| for (SupportedKeySize keySize : SupportedKeySize.values()) { |
| System.out.println("Checking " + keySize.primeSize + " ..."); |
| KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH", "SunJCE"); |
| kpg.initialize(keySize.primeSize); |
| KeyPair kp = kpg.generateKeyPair(); |
| checkKeyPair(kp, keySize.primeSize); |
| |
| DHPublicKey publicKey = (DHPublicKey)kp.getPublic(); |
| BigInteger p = publicKey.getParams().getP(); |
| BigInteger g = publicKey.getParams().getG(); |
| kpg.initialize(new DHParameterSpec(p, g)); |
| kp = kpg.generateKeyPair(); |
| checkKeyPair(kp, keySize.primeSize); |
| } |
| } |
| |
| private static void checkKeyPair(KeyPair kp, int pSize) throws Exception { |
| |
| DHPrivateKey privateKey = (DHPrivateKey)kp.getPrivate(); |
| BigInteger p = privateKey.getParams().getP(); |
| if (p.bitLength() != pSize) { |
| throw new Exception( |
| "Invalid modulus size: " + p.bitLength() + "/" + pSize); |
| } |
| |
| // System.out.println("P(" + pSize + "): " + p.toString()); |
| if (!p.isProbablePrime(128)) { |
| throw new Exception("Good luck, the modulus is composite!"); |
| } |
| |
| DHPublicKey publicKey = (DHPublicKey)kp.getPublic(); |
| p = publicKey.getParams().getP(); |
| if (p.bitLength() != pSize) { |
| throw new Exception( |
| "Invalid modulus size: " + p.bitLength() + "/" + pSize); |
| } |
| |
| BigInteger leftOpen = BigInteger.ONE; |
| BigInteger rightOpen = p.subtract(BigInteger.ONE); |
| |
| BigInteger x = privateKey.getX(); |
| if ((x.compareTo(leftOpen) <= 0) || |
| (x.compareTo(rightOpen) >= 0)) { |
| throw new Exception( |
| "X outside range [2, p - 2]: x: " + x + " p: " + p); |
| } |
| |
| BigInteger y = publicKey.getY(); |
| if ((y.compareTo(leftOpen) <= 0) || |
| (y.compareTo(rightOpen) >= 0)) { |
| throw new Exception( |
| "Y outside range [2, p - 2]: x: " + x + " p: " + p); |
| } |
| } |
| } |