1 /*
   2  * Copyright (c) 2003, 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 4856966
  27  * @summary Test the Signature.update(ByteBuffer) method
  28  * @author Andreas Sterbenz
  29  * @library ..
  30  * @key randomness
  31  */
  32 
  33 import java.util.*;
  34 import java.nio.*;
  35 
  36 import java.security.*;
  37 
  38 public class ByteBuffers extends PKCS11Test {
  39 
  40     public static void main(String[] args) throws Exception {
  41         main(new ByteBuffers());
  42     }
  43 
  44     public void main(Provider p) throws Exception {
  45         Random random = new Random();
  46         int n = 10 * 1024;
  47         byte[] t = new byte[n];
  48         random.nextBytes(t);
  49 
  50         KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", p);
  51         kpg.initialize(512);
  52         KeyPair kp = kpg.generateKeyPair();
  53 
  54         Signature sig = Signature.getInstance("MD5withRSA", p);
  55         sig.initSign(kp.getPrivate());
  56         sig.update(t);
  57         byte[] signature = sig.sign();
  58 
  59         sig.initVerify(kp.getPublic());
  60 
  61         // test 1: ByteBuffer with an accessible backing array
  62         ByteBuffer b1 = ByteBuffer.allocate(n + 256);
  63         b1.position(random.nextInt(256));
  64         b1.limit(b1.position() + n);
  65         ByteBuffer b2 = b1.slice();
  66         b2.put(t);
  67         b2.clear();
  68         verify(sig, signature, b2, random);
  69 
  70         // test 2: direct ByteBuffer
  71         ByteBuffer b3 = ByteBuffer.allocateDirect(t.length);
  72         b3.put(t);
  73         b3.clear();
  74         verify(sig, signature, b3, random);
  75 
  76         // test 3: ByteBuffer without an accessible backing array
  77         b2.clear();
  78         ByteBuffer b4 = b2.asReadOnlyBuffer();
  79         verify(sig, signature, b4, random);
  80 
  81         System.out.println("All tests passed");
  82     }
  83 
  84     private static void verify(Signature sig, byte[] signature, ByteBuffer b, Random random) throws Exception {
  85         int lim = b.limit();
  86         b.limit(random.nextInt(lim));
  87         sig.update(b);
  88         if (b.hasRemaining()) {
  89             throw new Exception("Buffer not consumed");
  90         }
  91         b.limit(lim);
  92         sig.update(b);
  93         if (b.hasRemaining()) {
  94             throw new Exception("Buffer not consumed");
  95         }
  96         if (sig.verify(signature) == false) {
  97             throw new Exception("Signature did not verify");
  98         }
  99     }
 100 }
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