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/*
* Copyright (c) 2003, 2024, 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 4921443
* @summary Ensure ISO10126Padding works correctly.
* @author Valerie Peng
* @key randomness
*/
import java.util.Arrays;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.Provider;
public class TestISO10126Padding {
private static final String ALGO = "AES";
private static final String TRANS = "AES/ECB";
private static final int KEYSIZE = 16; // in bytes
private SecretKey key;
private TestISO10126Padding() throws Exception {
// setup
KeyGenerator kg = KeyGenerator.getInstance(ALGO,
System.getProperty("test.provider.name", "SunJCE"));
kg.init(KEYSIZE*8);
key = kg.generateKey();
}
private void runTest(int dataLength) throws Exception {
// setup
byte[] data = new byte[dataLength];
new SecureRandom().nextBytes(data);
System.out.println("Testing data length: " + dataLength);
// TEST#1 --
// generate the cipher text using manually-supplied
// XML Encryption padding
Cipher ci = Cipher.getInstance(TRANS + "/NoPadding",
System.getProperty("test.provider.name", "SunJCE"));
ci.init(Cipher.ENCRYPT_MODE, key);
byte[] paddedData = new byte[ci.getBlockSize()];
System.arraycopy(data, 0, paddedData, 0, data.length);
int padValue = paddedData.length - data.length;
paddedData[paddedData.length-1] = (byte) padValue;
byte[] cipherText = ci.doFinal(paddedData);
// decrypt using ISO10126Padding
ci = Cipher.getInstance(TRANS + "/ISO10126Padding",
System.getProperty("test.provider.name", "SunJCE"));
ci.init(Cipher.DECRYPT_MODE, key);
byte[] recovered = ci.doFinal(cipherText);
if (!Arrays.equals(data, recovered)) {
throw new Exception("TEST#1: decryption failed");
}
// TEST#2 --
// generate the cipher text using ISO10126Padding
ci = Cipher.getInstance(TRANS + "/ISO10126Padding",
System.getProperty("test.provider.name", "SunJCE"));
ci.init(Cipher.ENCRYPT_MODE, key);
cipherText = ci.doFinal(data);
// decrypt using ISO10126Padding
ci.init(Cipher.DECRYPT_MODE, key);
recovered = ci.doFinal(cipherText);
if (!Arrays.equals(data, recovered)) {
throw new Exception("TEST#2: decryption failed");
}
}
public static void main(String[] argv) throws Exception {
TestISO10126Padding test = new TestISO10126Padding();
for (int i = 0; i<16; i++) {
test.runTest(i);
}
System.out.println("Test Passed");
}
}
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