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