| /* |
| * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4513830 |
| * @summary Verify the output size returned by AES cipher.getOutputSize |
| * method in DECRYPT mode does not add extra bytes for padding |
| * @author Valerie Peng |
| * @key randomness |
| */ |
| import java.io.PrintStream; |
| import java.security.*; |
| import java.security.spec.*; |
| import java.util.Random; |
| |
| import javax.crypto.*; |
| import javax.crypto.spec.*; |
| import java.security.Provider; |
| |
| public class Test4513830 { |
| |
| private static final String ALGO = "AES"; |
| private static final String MODE = "ECB"; |
| private static final String PADDING = "PKCS5Padding"; |
| private static final int KEYSIZE = 16; // in bytes |
| private static final int TEXTLENGTHS[] = { |
| 16, 17, 18, 19, 20, 21, 22, 23 }; |
| |
| public boolean execute() throws Exception { |
| Random rdm = new Random(); |
| byte[] plainText=new byte[125]; |
| rdm.nextBytes(plainText); |
| |
| Cipher ci = Cipher.getInstance(ALGO+"/"+MODE+"/"+PADDING, "SunJCE"); |
| |
| // TEST FIX 4513830 |
| KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE"); |
| kg.init(KEYSIZE*8); |
| SecretKey key = kg.generateKey(); |
| |
| ci.init(Cipher.DECRYPT_MODE, key); |
| int recoveredTextLength = ci.getOutputSize(16); |
| |
| if (recoveredTextLength != 16) { |
| throw new Exception("output size should not increase when decrypting!"); |
| } |
| |
| // BONUS TESTS |
| // 1. call getOutputSize with various lengths and see if |
| // the returned size is correct. |
| for (int i=0; i<TEXTLENGTHS.length; i++) { |
| ci.init(Cipher.ENCRYPT_MODE, key); |
| int cipherTextLength = ci.getOutputSize(TEXTLENGTHS[i]); |
| if (cipherTextLength != 32) { |
| throw new Exception("output size " + cipherTextLength |
| + " for input size " + TEXTLENGTHS[i] |
| + " when encrypting is wrong!"); |
| } |
| } |
| |
| // passed all tests...hooray! |
| return true; |
| } |
| |
| public static void main (String[] args) throws Exception { |
| Test4513830 test = new Test4513830(); |
| String testName = test.getClass().getName() + "[" + ALGO + |
| "/" + MODE + "/" + PADDING + "]"; |
| if (test.execute()) { |
| System.out.println(testName + ": Passed!"); |
| } |
| } |
| } |