1 /*
   2  * Copyright (c) 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.spec.InvalidParameterSpecException;
  28 import java.util.Random;
  29 import javax.crypto.BadPaddingException;
  30 import javax.crypto.Cipher;
  31 import javax.crypto.IllegalBlockSizeException;
  32 import javax.crypto.KeyGenerator;
  33 import javax.crypto.NoSuchPaddingException;
  34 import javax.crypto.SecretKey;
  35 import javax.crypto.ShortBufferException;
  36 import javax.crypto.spec.GCMParameterSpec;
  37 
  38 /**
  39  * @test
  40  * @bug 8043836
  41  * @summary Test AES encryption with no padding. Expect the original data length
  42  *          is the same as the encrypted data.
  43  * @key randomness
  44  */
  45 public class TestNonexpanding {
  46 
  47     private static final String ALGORITHM = "AES";
  48     private static final String PROVIDER = "SunJCE";
  49     private static final String[] MODES = { "ECb", "CbC", "OFB", "OFB150",
  50         "cFB", "CFB7", "cFB8", "cFB16", "cFB24", "cFB32", "Cfb40", "cfB48",
  51         "cfB56", "cfB64", "cfB72", "cfB80", "cfB88", "cfB96", "cfb104",
  52         "cfB112", "cfB120", "GCM" };
  53     private static final String PADDING = "NoPadding";
  54     private static final int KEY_LENGTH = 128;
  55 
  56     public static void main(String argv[]) throws Exception {
  57         TestNonexpanding test = new TestNonexpanding();
  58         for (String mode : MODES) {
  59             test.runTest(ALGORITHM, mode, PADDING);
  60         }
  61     }
  62 
  63     public void runTest(String algo, String mo, String pad) throws Exception {
  64         Cipher ci = null;
  65         SecretKey key = null;
  66         try {
  67             // Initialization
  68             Random rdm = new Random();
  69             byte[] plainText = new byte[128];
  70             rdm.nextBytes(plainText);
  71 
  72             ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
  73 
  74             KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
  75             kg.init(KEY_LENGTH);
  76             key = kg.generateKey();
  77 
  78             // encrypt
  79             ci.init(Cipher.ENCRYPT_MODE, key);
  80             byte[] cipherText = new byte[ci.getOutputSize(plainText.length)];
  81             int offset = ci.update(plainText, 0, plainText.length, cipherText,
  82                     0);
  83             ci.doFinal(cipherText, offset);
  84 
  85             // Comparison
  86             if (!(plainText.length == cipherText.length)) {
  87                 // The result of encryption in GCM is a combination of an
  88                 // authentication tag and cipher text.
  89                 if (mo.equalsIgnoreCase("GCM")) {
  90                     GCMParameterSpec spec = ci.getParameters().getParameterSpec(GCMParameterSpec.class);
  91                     int cipherTextLength = cipherText.length - spec.getTLen()
  92                             / 8;
  93                     if (plainText.length == cipherTextLength) {
  94                         return;
  95                     }
  96                 }
  97                 System.out.println("Original length: " + plainText.length);
  98                 System.out.println("Cipher text length: " + cipherText.length);
  99                 throw new RuntimeException("Test failed!");
 100             }
 101         } catch (NoSuchAlgorithmException e) {
 102             //CFB7 and OFB150 are for negative testing
 103             if (!mo.equalsIgnoreCase("CFB7") && !mo.equalsIgnoreCase("OFB150")) {
 104                 System.out.println("Unexpected NoSuchAlgorithmException with mode: "
 105                         + mo);
 106                 throw new RuntimeException("Test failed!");
 107             }
 108         } catch ( NoSuchProviderException | NoSuchPaddingException
 109                 | InvalidKeyException | InvalidParameterSpecException
 110                 | ShortBufferException | IllegalBlockSizeException
 111                 | BadPaddingException e) {
 112             System.out.println("Test failed!");
 113             throw e;
 114         }
 115     }
 116 }
--- EOF ---