1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 8072452
  27  * @summary Support DHE sizes up to 8192-bits
  28  * @library ..
  29  * @run main/othervm SupportedDHKeys
  30  * @run main/othervm SupportedDHKeys sm
  31  */
  32 
  33 import java.math.BigInteger;
  34 
  35 import java.security.*;
  36 import javax.crypto.*;
  37 import javax.crypto.interfaces.*;
  38 import javax.crypto.spec.*;
  39 
  40 public class SupportedDHKeys extends PKCS11Test {
  41 
  42     /*
  43      * Sizes and values for various lengths.
  44      */
  45     private enum SupportedKeySize {
  46         dhp512(512),   dhp768(768),    dhp832(832),
  47         dhp1024(1024), dhp1536(1536),  dhp2048(2048);
  48 
  49         // the underlying pkcs11 may not support the following sizes yet
  50         //
  51         // dhp3072(3072), dhp4096(4096),  dhp6144(6144),
  52         // dhp8192(8192);
  53 
  54         final int primeSize;
  55 
  56         SupportedKeySize(int primeSize) {
  57             this.primeSize = primeSize;
  58         }
  59     }
  60 
  61     @Override
  62     public void main(Provider provider) throws Exception {
  63         if (provider.getService("KeyAgreement", "DH") == null) {
  64             System.out.println("DH not supported, skipping");
  65             return;
  66         }
  67 
  68         for (SupportedKeySize keySize : SupportedKeySize.values()) {
  69             System.out.println("Checking " + keySize.primeSize + " ...");
  70             KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH", provider);
  71             kpg.initialize(keySize.primeSize);
  72             KeyPair kp = kpg.generateKeyPair();
  73             checkKeyPair(kp, keySize.primeSize);
  74 
  75             DHPublicKey publicKey = (DHPublicKey)kp.getPublic();
  76             BigInteger p = publicKey.getParams().getP();
  77             BigInteger g = publicKey.getParams().getG();
  78             kpg.initialize(new DHParameterSpec(p, g));
  79             kp = kpg.generateKeyPair();
  80             checkKeyPair(kp, keySize.primeSize);
  81         }
  82     }
  83 
  84     private static void checkKeyPair(KeyPair kp, int pSize) throws Exception {
  85 
  86         DHPrivateKey privateKey = (DHPrivateKey)kp.getPrivate();
  87         BigInteger p = privateKey.getParams().getP();
  88         if (p.bitLength() != pSize) {
  89             throw new Exception(
  90                 "Invalid modulus size: " + p.bitLength() + "/" + pSize);
  91         }
  92 
  93         // System.out.println("P(" + pSize + "): " + p.toString());
  94         if (!p.isProbablePrime(128)) {
  95             throw new Exception("Good luck, the modulus is composite!");
  96         }
  97 
  98         DHPublicKey publicKey = (DHPublicKey)kp.getPublic();
  99         p = publicKey.getParams().getP();
 100         if (p.bitLength() != pSize) {
 101             throw new Exception(
 102                 "Invalid modulus size: " + p.bitLength() + "/" + pSize);
 103         }
 104 
 105         BigInteger leftOpen = BigInteger.ONE;
 106         BigInteger rightOpen = p.subtract(BigInteger.ONE);
 107 
 108         BigInteger x = privateKey.getX();
 109         if ((x.compareTo(leftOpen) <= 0) ||
 110                 (x.compareTo(rightOpen) >= 0)) {
 111             throw new Exception(
 112                 "X outside range [2, p - 2]:  x: " + x + " p: " + p);
 113         }
 114 
 115         BigInteger y = publicKey.getY();
 116         if ((y.compareTo(leftOpen) <= 0) ||
 117                 (y.compareTo(rightOpen) >= 0)) {
 118             throw new Exception(
 119                 "Y outside range [2, p - 2]:  x: " + x + " p: " + p);
 120         }
 121     }
 122 
 123     public static void main(String[] args) throws Exception {
 124         main(new SupportedDHKeys(), args);
 125     }
 126 }