1 /*
   2  * Copyright (c) 2003, 2007, 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 4844847
  27  * @summary Test the Cipher.update/doFinal(ByteBuffer, ByteBuffer) methods
  28  * @author Andreas Sterbenz

  29  */
  30 
  31 import java.util.*;
  32 import java.nio.*;
  33 
  34 import java.security.*;
  35 
  36 import javax.crypto.*;
  37 import javax.crypto.spec.*;
  38 
  39 public class ByteBuffers {
  40 
  41     public static void main(String[] args) throws Exception {
  42         Provider p = Security.getProvider("SunJCE");
  43         Random random = new Random();
  44         int n = 10 * 1024;
  45         byte[] t = new byte[n];
  46         random.nextBytes(t);
  47 
  48         byte[] keyBytes = new byte[8];
  49         random.nextBytes(keyBytes);
  50         SecretKey key = new SecretKeySpec(keyBytes, "DES");
  51 
  52         Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
  53         cipher.init(Cipher.ENCRYPT_MODE, key);
  54 
  55         byte[] outBytes = cipher.doFinal(t);
  56 
  57         // create ByteBuffers for input (i1, i2, i3) and fill them
  58         ByteBuffer i0 = ByteBuffer.allocate(n + 256);
  59         i0.position(random.nextInt(256));
  60         i0.limit(i0.position() + n);
  61         ByteBuffer i1 = i0.slice();
  62         i1.put(t);
  63 
  64         ByteBuffer i2 = ByteBuffer.allocateDirect(t.length);
  65         i2.put(t);
  66 
  67         i1.clear();
  68         ByteBuffer i3 = i1.asReadOnlyBuffer();
  69 
  70         ByteBuffer o0 = ByteBuffer.allocate(n + 512);
  71         o0.position(random.nextInt(256));
  72         o0.limit(o0.position() + n + 256);
  73         ByteBuffer o1 = o0.slice();
  74 
  75         ByteBuffer o2 = ByteBuffer.allocateDirect(t.length + 256);
  76 
  77         crypt(cipher, i1, o1, outBytes, random);
  78         crypt(cipher, i2, o1, outBytes, random);
  79         crypt(cipher, i3, o1, outBytes, random);
  80         crypt(cipher, i1, o2, outBytes, random);
  81         crypt(cipher, i2, o2, outBytes, random);
  82         crypt(cipher, i3, o2, outBytes, random);
  83 
  84         System.out.println("All tests passed");
  85     }
  86 
  87     private static void crypt(Cipher cipher, ByteBuffer in, ByteBuffer out, byte[] outBytes, Random random) throws Exception {
  88         in.clear();
  89         out.clear();
  90         out.put(new byte[out.remaining()]);
  91         out.clear();
  92         int lim = in.limit();
  93         in.limit(random.nextInt(lim));
  94         cipher.update(in, out);
  95         if (in.hasRemaining()) {
  96             throw new Exception("Buffer not consumed");
  97         }
  98         in.limit(lim);
  99         cipher.doFinal(in, out);
 100         if (in.hasRemaining()) {
 101             throw new Exception("Buffer not consumed");
 102         }
 103         out.flip();
 104         byte[] b = new byte[out.remaining()];
 105         out.get(b);
 106         if (Arrays.equals(outBytes, b) == false) {
 107             throw new Exception("Encryption output mismatch");
 108         }
 109     }
 110 }
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