1 /*
   2  * Copyright (c) 2011, 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 7081411
  27  * @summary DSA keypair generation affected by Solaris bug
  28  * @modules java.base/sun.security.provider
  29  */
  30 
  31 import java.security.KeyPair;
  32 import java.security.KeyPairGenerator;
  33 import java.security.Signature;
  34 import sun.security.provider.DSAPrivateKey;
  35 
  36 public class SolarisShortDSA {
  37     static byte[] data = new byte[0];
  38     public static void main(String args[]) throws Exception {
  39         for (int i=0; i<10000; i++) {
  40             KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
  41             KeyPair kp = kpg.generateKeyPair();
  42             DSAPrivateKey dpk = (DSAPrivateKey)kp.getPrivate();
  43             int len = dpk.getX().bitLength();
  44             if (len <= 152) {
  45                 if (!use(kp)) {
  46                     throw new RuntimeException("Real test failure");
  47                 }
  48                 break;
  49             }
  50         }
  51     }
  52 
  53     static boolean use(KeyPair kp) throws Exception {
  54         Signature sig = Signature.getInstance("SHA1withDSA");
  55         sig.initSign(kp.getPrivate());
  56         sig.update(data);
  57         byte[] signed = sig.sign();
  58         Signature sig2 = Signature.getInstance("SHA1withDSA");
  59         sig2.initVerify(kp.getPublic());
  60         sig2.update(data);
  61         return sig2.verify(signed);
  62    }
  63 }