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