1 /*
   2  * Copyright (c) 2015, 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 static java.lang.System.out;
  25 
  26 import java.nio.ByteBuffer;
  27 import java.security.MessageDigest;
  28 import java.util.Random;
  29 
  30 /**
  31  * @test
  32  * @bug 8050371
  33  * @summary Check md.getDigestLength() equal digest output length with various
  34  *          algorithm/dataLen/(update,digest methods).
  35  * @author Kevin Liu

  36  */
  37 
  38 public class TestSameLength {
  39 
  40     public static void main(String[] args) throws Exception {
  41         TestSameLength test = new TestSameLength();
  42         test.run();
  43     }
  44 
  45     private void run() throws Exception {
  46         String[] algorithmArr = {
  47                 "SHA", "Sha", "SHA-1", "sha-1", "SHA1", "sha1", "MD5", "md5",
  48                 "SHA-224", "SHA-256", "SHA-384", "SHA-512"
  49         };
  50         int[] nUpdatesArr = {
  51                 0, 1, 2, 3
  52         };
  53         int[] dataLenArr = {
  54                 1, 50, 2500, 125000, 6250000
  55         };
  56 
  57         for (String algorithm: algorithmArr) {
  58             for (UpdateMethod update: UpdateMethod.values()) {
  59                 for (int dataLen: dataLenArr) {
  60                     if (!runTest(algorithm, dataLen, update)) {
  61                         throw new RuntimeException(
  62                                 "Test failed at algorithm/dataLen/numUpdate:"
  63                                         + algorithm + "/" + dataLen + "/"
  64                                         + update.toString());
  65                     }
  66                 }
  67             }
  68         }
  69 
  70         out.println("All " + algorithmArr.length * nUpdatesArr.length
  71                 * dataLenArr.length + " tests Passed");
  72     }
  73 
  74     private boolean runTest(String algo, long dataLen,
  75             UpdateMethod whichUpdate) throws Exception {
  76         try {
  77             // Do initialization
  78             byte[] data = new byte[(int) dataLen];
  79             new Random().nextBytes(data);
  80             MessageDigest md = MessageDigest.getInstance(algo);
  81             int outputLen = md.getDigestLength();
  82 
  83             // Perform the update using all available/possible update methods
  84             whichUpdate.updateDigest(data, md, dataLen);
  85             // Get the output
  86             byte[] output = md.digest();
  87 
  88             // Compare input and output
  89             return outputLen == output.length;
  90         } catch (Exception ex) {
  91             System.err.println("Testing: " + algo + "/" + dataLen + "/"
  92                     + whichUpdate.toString()
  93                     + " failed with unexpected exception");
  94             ex.printStackTrace();
  95             throw ex;
  96         }
  97     }
  98 
  99     private static enum UpdateMethod {
 100         UPDATE_BYTE {
 101             @Override
 102             public void updateDigest(byte[] data,
 103                     MessageDigest md, long dataLen) {
 104 
 105                 for (int i = 0; i < dataLen; i++) {
 106                     md.update(data[i]);
 107                 }
 108             }
 109         },
 110 
 111         UPDATE_BUFFER {
 112             @Override
 113             public void updateDigest(byte[] data,
 114                     MessageDigest md, long dataLen) {
 115 
 116                 md.update(data);
 117             }
 118         },
 119 
 120         UPDATE_BUFFER_LEN {
 121             @Override
 122             public void updateDigest(byte[] data,
 123                     MessageDigest md, long dataLen) {
 124 
 125                 for (int i = 0; i < dataLen; i++) {
 126                     md.update(data, i, 1);
 127                 }
 128             }
 129         },
 130 
 131         UPDATE_BYTE_BUFFER {
 132             @Override
 133             public void updateDigest(byte[] data,
 134                     MessageDigest md, long dataLen) {
 135 
 136                 md.update(ByteBuffer.wrap(data));
 137             }
 138         };
 139 
 140         public abstract void updateDigest(byte[] data,
 141                     MessageDigest md, long dataLen);
 142         }
 143 }
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