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/*
* Copyright (c) 2016, 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 6946830
* @summary Test the Cipher.doFinal() with 0-length buffer
* @key randomness
*/
import java.util.*;
import java.nio.*;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
public class EmptyFinalBuffer {
private static final String[] ALGOS = {
"AES/ECB/PKCS5Padding", "AES/CBC/PKCS5Padding"
};
public static void main(String[] args) throws Exception {
Provider[] provs = Security.getProviders();
SecretKey key = new SecretKeySpec(new byte[16], "AES");
boolean testFailed = false;
for (Provider p : provs) {
System.out.println("Testing: " + p.getName());
for (String algo : ALGOS) {
System.out.print("Algo: " + algo);
Cipher c;
try {
c = Cipher.getInstance(algo, p);
} catch (NoSuchAlgorithmException nsae) {
// skip
System.out.println("=> No Support");
continue;
}
c.init(Cipher.ENCRYPT_MODE, key);
AlgorithmParameters params = c.getParameters();
c.init(Cipher.DECRYPT_MODE, key, params);
try {
byte[] out = c.doFinal(new byte[0]);
System.out.println("=> Accepted w/ " +
(out == null? "null" : (out.length + "-byte")) +
" output");
} catch (Exception e) {
testFailed = true;
System.out.println("=> Rejected w/ Exception");
e.printStackTrace();
}
}
}
if (testFailed) {
throw new Exception("One or more tests failed");
} else {
System.out.println("All tests passed");
}
}
}
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