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  */
  29 
  30 import java.math.BigInteger;
  31 
  32 import java.security.*;
  33 import javax.crypto.*;
  34 import javax.crypto.interfaces.*;
  35 import javax.crypto.spec.*;
  36 
  37 public class UnsupportedDHKeys {
  38 
  39     /*
  40      * Sizes and values for various lengths.
  41      */
  42     private enum UnsupportedKeySize {
  43         // not multiple of 64
  44         dhp513(513),    dhp769(769),    dhp895(895),
  45         dhp1023(1023),  dhp1535(1535),  dhp2047(2047),
  46 
  47         // unsupported
  48         dhp2176(2176),  dhp3008(3008),  dhp4032(4032),
  49         dhp5120(5120),  dhp6400(6400),  dhp7680(7680),
  50         dhp8192(8191),  dhp8128(8128),  dhp8260(8260);
  51 
  52         final int primeSize;
  53 
  54         UnsupportedKeySize(int primeSize) {
  55             this.primeSize = primeSize;
  56         }
  57     }
  58 
  59     public static void main(String[] args) throws Exception {
  60         for (UnsupportedKeySize keySize : UnsupportedKeySize.values()) {
  61             try {
  62                 System.out.println("Checking " + keySize.primeSize + " ...");
  63                 KeyPairGenerator kpg =
  64                         KeyPairGenerator.getInstance("DH", "SunJCE");
  65                 kpg.initialize(keySize.primeSize);
  66                 KeyPair kp = kpg.generateKeyPair();
  67 
  68                 throw new Exception("Should not support " + keySize.primeSize);
  69             } catch (InvalidParameterException ipe) {
  70                 System.out.println("\tOk, unsupported");
  71                 System.out.println(ipe);
  72                 // ipe.printStackTrace(System.out);
  73             }
  74         }
  75     }
  76 }