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 4921443
  27  * @summary Ensure ISO10126Padding works correctly.
  28  * @author Valerie Peng
  29  * @key randomness
  30  */
  31 import java.util.Arrays;
  32 import java.security.*;
  33 import java.security.spec.*;
  34 
  35 import javax.crypto.*;
  36 import javax.crypto.spec.*;
  37 import java.security.Provider;
  38 import com.sun.crypto.provider.*;
  39 
  40 public class TestISO10126Padding {
  41     private static final String ALGO = "AES";
  42     private static final String TRANS = "AES/ECB";
  43     private static final int KEYSIZE = 16; // in bytes
  44 
  45     private SecretKey key;
  46 
  47     private TestISO10126Padding() throws Exception {
  48         // setup
  49         KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE");
  50         kg.init(KEYSIZE*8);
  51         key = kg.generateKey();
  52     }
  53 
  54     private void runTest(int dataLength) throws Exception {
  55         // setup
  56         byte[] data = new byte[dataLength];
  57         new SecureRandom().nextBytes(data);
  58         System.out.println("Testing data length: " + dataLength);
  59 
  60         // TEST#1 --
  61         // generate the cipher text using manually-supplied
  62         // XML Encryption padding
  63         Cipher ci = Cipher.getInstance(TRANS + "/NoPadding", "SunJCE");
  64         ci.init(Cipher.ENCRYPT_MODE, key);
  65         byte[] paddedData = new byte[ci.getBlockSize()];
  66         System.arraycopy(data, 0, paddedData, 0, data.length);
  67         int padValue = paddedData.length - data.length;
  68         paddedData[paddedData.length-1] = (byte) padValue;
  69         byte[] cipherText = ci.doFinal(paddedData);
  70 
  71         // decrypt using ISO10126Padding
  72         ci = Cipher.getInstance(TRANS + "/ISO10126Padding", "SunJCE");
  73         ci.init(Cipher.DECRYPT_MODE, key);
  74         byte[] recovered = ci.doFinal(cipherText);
  75         if (!Arrays.equals(data, recovered)) {
  76             throw new Exception("TEST#1: decryption failed");
  77         }
  78         // TEST#2 --
  79         // generate the cipher text using ISO10126Padding
  80         ci = Cipher.getInstance(TRANS + "/ISO10126Padding", "SunJCE");
  81         ci.init(Cipher.ENCRYPT_MODE, key);
  82         cipherText = ci.doFinal(data);
  83 
  84         // decrypt using ISO10126Padding
  85         ci.init(Cipher.DECRYPT_MODE, key);
  86         recovered = ci.doFinal(cipherText);
  87         if (!Arrays.equals(data, recovered)) {
  88             throw new Exception("TEST#2: decryption failed");
  89         }
  90     }
  91 
  92     public static void main(String[] argv) throws Exception {
  93         TestISO10126Padding test = new TestISO10126Padding();
  94         for (int i = 0; i<16; i++) {
  95             test.runTest(i);
  96         }
  97         System.out.println("Test Passed");
  98     }
  99 }