1 /*
   2  * Copyright (c) 1998, 2014, 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 import java.security.InvalidKeyException;
  25 import java.security.NoSuchAlgorithmException;
  26 import java.security.NoSuchProviderException;
  27 import java.security.SecureRandom;
  28 import javax.crypto.Mac;
  29 import javax.crypto.spec.SecretKeySpec;
  30 
  31 /**
  32  * @test
  33  * @bug 8048603
  34  * @summary Check if doFinal and update operation result in same Mac
  35  * @author Yu-Ching Valerie Peng, Bill Situ, Alexander Fomin
  36  * @build Utils
  37  * @run main MacSameTest
  38  */
  39 public class MacSameTest implements MacTest {
  40 
  41     private static final int MESSAGE_SIZE = 25;
  42     private static final int OFFSET = 5;
  43     private static final int KEY_SIZE = 70;
  44 
  45     /**
  46      * Initialize a message, instantiate a Mac object,
  47      * initialize the object with a SecretKey,
  48      * feed the message into the Mac object
  49      * all at once and get the output MAC as result1.
  50      * Reset the Mac object, chop the message into three pieces,
  51      * feed into the Mac object sequentially, and get the output MAC as result2.
  52      * Finally, compare result1 and result2 and see if they are the same.
  53      *
  54      * @param args the command line arguments
  55      */
  56     public static void main(String[] args) {
  57         Utils.runTests(new MacSameTest());
  58     }
  59 
  60     @Override
  61     public void doTest(String algo) throws NoSuchAlgorithmException,
  62             NoSuchProviderException, InvalidKeyException {
  63         Mac mac;
  64         try {
  65             mac = Mac.getInstance(algo, "SunJCE");
  66         } catch (NoSuchAlgorithmException nsae) {
  67             // depending on Solaris configuration,
  68             // it can support HMAC or not with Mac
  69             System.out.println("Expected NoSuchAlgorithmException thrown: "
  70                     + nsae);
  71             return;
  72         }
  73 
  74         byte[] plain = new byte[MESSAGE_SIZE];
  75         for (int i = 0; i < MESSAGE_SIZE; i++) {
  76             plain[i] = (byte) (i % 256);
  77         }
  78 
  79         byte[] tail = new byte[plain.length - OFFSET];
  80         System.arraycopy(plain, OFFSET, tail, 0, tail.length);
  81 
  82         SecureRandom srdm = new SecureRandom();
  83         byte[] keyVal = new byte[KEY_SIZE];
  84         srdm.nextBytes(keyVal);
  85         SecretKeySpec keySpec = new SecretKeySpec(keyVal, "HMAC");
  86 
  87         mac.init(keySpec);
  88         byte[] result1 = mac.doFinal(plain);
  89 
  90         mac.reset();
  91         mac.update(plain[0]);
  92         mac.update(plain, 1, OFFSET - 1);
  93         byte[] result2 = mac.doFinal(tail);
  94 
  95         if (!java.util.Arrays.equals(result1, result2)) {
  96             throw new RuntimeException("result1 and result2 are not the same");
  97         }
  98     }
  99 
 100 }