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Java example source code file (Test4517355.java)
The Test4517355.java Java example source code/* * Copyright (c) 2002, 2013, 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 4517355 * @summary Verify that AES cipher.doFinal method does NOT need more * than necessary bytes in decrypt mode * @author Valerie Peng */ import java.io.PrintStream; import java.security.*; import java.security.spec.*; import java.util.*; import javax.crypto.*; import javax.crypto.spec.*; import java.security.Provider; import com.sun.crypto.provider.*; public class Test4517355 { private static final String ALGO = "AES"; private static final int KEYSIZE = 16; // in bytes private static byte[] plainText = new byte[125]; public void execute(String mode, String padding) throws Exception { String transformation = ALGO + "/" + mode + "/" + padding; Cipher ci = Cipher.getInstance(transformation, "SunJCE"); KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE"); kg.init(KEYSIZE*8); SecretKey key = kg.generateKey(); // TEST FIX 4517355 ci.init(Cipher.ENCRYPT_MODE, key); byte[] cipherText = ci.doFinal(plainText); if (mode.equalsIgnoreCase("GCM")) { AlgorithmParameters params = ci.getParameters(); ci.init(Cipher.DECRYPT_MODE, key, params); } else { byte[] iv = ci.getIV(); AlgorithmParameterSpec aps = new IvParameterSpec(iv); ci.init(Cipher.DECRYPT_MODE, key, aps); } byte[] recoveredText = new byte[plainText.length]; try { int len = ci.doFinal(cipherText, 0, cipherText.length, recoveredText); } catch (ShortBufferException ex) { throw new Exception("output buffer is the right size!"); } // BONUS TESTS // 1. make sure the recoveredText is the same as the plainText if (!Arrays.equals(plainText, recoveredText)) { throw new Exception("encryption/decryption does not work!"); } // 2. make sure encryption does happen if (Arrays.equals(plainText, cipherText)) { throw new Exception("encryption does not work!"); } // 3. make sure padding is working if (padding.equalsIgnoreCase("PKCS5Padding")) { if ((cipherText.length/16)*16 != cipherText.length) { throw new Exception("padding does not work!"); } } System.out.println(transformation + ": Passed"); } public static void main (String[] args) throws Exception { Security.addProvider(new com.sun.crypto.provider.SunJCE()); Test4517355 test = new Test4517355(); Random rdm = new Random(); rdm.nextBytes(test.plainText); test.execute("CBC", "PKCS5Padding"); test.execute("GCM", "NoPadding"); } } Other Java examples (source code examples)Here is a short list of links related to this Java Test4517355.java source code file: |
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