1 /*
   2  * Copyright (c) 2003, 2017, 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 MessageDigest.update(ByteBuffer) method
  28  * @author Andreas Sterbenz
  29  * @library ..
  30  * @key randomness
  31  * @modules jdk.crypto.cryptoki
  32  * @run main/othervm ByteBuffers
  33  * @run main/othervm ByteBuffers sm
  34  */
  35 
  36 import java.nio.ByteBuffer;
  37 import java.security.MessageDigest;
  38 import java.security.Provider;
  39 import java.util.Arrays;
  40 import java.util.Random;
  41 
  42 public class ByteBuffers extends PKCS11Test {
  43 
  44     public static void main(String[] args) throws Exception {
  45         main(new ByteBuffers(), args);
  46     }
  47 
  48     @Override
  49     public void main(Provider p) throws Exception {
  50         if (p.getService("MessageDigest", "MD5") == null) {
  51             System.out.println("Provider does not support MD5, skipping");
  52             return;
  53         }
  54 
  55         Random random = new Random();
  56         int n = 10 * 1024;
  57         byte[] t = new byte[n];
  58         random.nextBytes(t);
  59 
  60         MessageDigest md = MessageDigest.getInstance("MD5", p);
  61         byte[] d1 = md.digest(t);
  62 
  63         // test 1: ByteBuffer with an accessible backing array
  64         ByteBuffer b1 = ByteBuffer.allocate(n + 256);
  65         b1.position(random.nextInt(256));
  66         b1.limit(b1.position() + n);
  67         ByteBuffer b2 = b1.slice();
  68         b2.put(t);
  69         b2.clear();
  70         byte[] d2 = digest(md, b2, random);
  71         if (Arrays.equals(d1, d2) == false) {
  72             throw new Exception("Test 1 failed");
  73         }
  74 
  75         // test 2: direct ByteBuffer
  76         ByteBuffer b3 = ByteBuffer.allocateDirect(t.length);
  77         b3.put(t);
  78         b3.clear();
  79         byte[] d3 = digest(md, b3, random);
  80         if (Arrays.equals(d1, d2) == false) {
  81             throw new Exception("Test 2 failed");
  82         }
  83 
  84         // test 3: ByteBuffer without an accessible backing array
  85         b2.clear();
  86         ByteBuffer b4 = b2.asReadOnlyBuffer();
  87         byte[] d4 = digest(md, b4, random);
  88         if (Arrays.equals(d1, d2) == false) {
  89             throw new Exception("Test 3 failed");
  90         }
  91         System.out.println("All tests passed");
  92     }
  93 
  94     private static byte[] digest(MessageDigest md, ByteBuffer b, Random random) throws Exception {
  95         int lim = b.limit();
  96         b.limit(random.nextInt(lim));
  97         md.update(b);
  98         if (b.hasRemaining()) {
  99             throw new Exception("Buffer not consumed");
 100         }
 101         b.limit(lim);
 102         md.update(b);
 103         if (b.hasRemaining()) {
 104             throw new Exception("Buffer not consumed");
 105         }
 106         return md.digest();
 107     }
 108 }