0N/A/*
2362N/A * Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
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0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4517355
0N/A * @summary Verify that AES cipher.doFinal method does NOT need more
0N/A * than necessary bytes in decrypt mode
0N/A * @author Valerie Peng
0N/A */
0N/Aimport java.io.PrintStream;
0N/Aimport java.security.*;
0N/Aimport java.security.spec.*;
0N/Aimport java.util.*;
0N/A
0N/Aimport javax.crypto.*;
0N/Aimport javax.crypto.spec.*;
0N/Aimport java.security.Provider;
0N/Aimport com.sun.crypto.provider.*;
0N/A
0N/Apublic class Test4517355 {
0N/A
0N/A private static final String ALGO = "AES";
0N/A private static final String MODE = "CBC";
0N/A private static final String PADDING = "PKCS5Padding";
0N/A private static final int KEYSIZE = 16; // in bytes
0N/A
0N/A public boolean execute() throws Exception {
0N/A Random rdm = new Random();
0N/A byte[] plainText=new byte[125];
0N/A rdm.nextBytes(plainText);
0N/A
0N/A Cipher ci = Cipher.getInstance(ALGO+"/"+MODE+"/"+PADDING, "SunJCE");
0N/A KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE");
0N/A kg.init(KEYSIZE*8);
0N/A SecretKey key = kg.generateKey();
0N/A
0N/A // TEST FIX 4517355
0N/A ci.init(Cipher.ENCRYPT_MODE, key);
0N/A byte[] cipherText = ci.doFinal(plainText);
0N/A
0N/A byte[] iv = ci.getIV();
0N/A AlgorithmParameterSpec aps = new IvParameterSpec(iv);
0N/A ci.init(Cipher.DECRYPT_MODE, key, aps);
0N/A byte[] recoveredText = new byte[plainText.length];
0N/A try {
0N/A int len = ci.doFinal(cipherText, 0, cipherText.length,
0N/A recoveredText);
0N/A } catch (ShortBufferException ex) {
0N/A throw new Exception("output buffer is the right size!");
0N/A }
0N/A
0N/A // BONUS TESTS
0N/A // 1. make sure the recoveredText is the same as the plainText
0N/A if (!Arrays.equals(plainText, recoveredText)) {
0N/A throw new Exception("encryption/decryption does not work!");
0N/A }
0N/A // 2. make sure encryption does happen
0N/A if (Arrays.equals(plainText, cipherText)) {
0N/A throw new Exception("encryption does not work!");
0N/A }
0N/A // 3. make sure padding is working
0N/A if ((cipherText.length/16)*16 != cipherText.length) {
0N/A throw new Exception("padding does not work!");
0N/A }
0N/A // passed all tests...hooray!
0N/A return true;
0N/A }
0N/A
0N/A public static void main (String[] args) throws Exception {
0N/A Security.addProvider(new com.sun.crypto.provider.SunJCE());
0N/A
0N/A Test4517355 test = new Test4517355();
0N/A String testName = test.getClass().getName() + "[" + ALGO +
0N/A "/" + MODE + "/" + PADDING + "]";
0N/A if (test.execute()) {
0N/A System.out.println(testName + ": Passed!");
0N/A }
0N/A }
0N/A}