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/*
* Copyright (c) 2018, 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 8178374
* @summary Test GCM decryption with various types of input/output
* ByteBuffer objects
* @key randomness
*/
import java.nio.ByteBuffer;
import java.security.*;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.AEADBadTagException;
import javax.crypto.spec.*;
public class TestGCMWithByteBuffer {
private static Random random = new SecureRandom();
private static int dataSize = 4096; // see javax.crypto.CipherSpi
private static int multiples = 3;
public static void main(String args[]) throws Exception {
Provider[] provs = Security.getProviders();
for (Provider p : provs) {
try {
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding", p);
test(cipher);
} catch (NoSuchAlgorithmException nsae) {
// skip testing due to no support
continue;
}
}
}
private static void test(Cipher cipher) throws Exception {
System.out.println("Testing " + cipher.getProvider());
boolean failedOnce = false;
Exception failedReason = null;
int tagLen = 96; // in bits
byte[] keyBytes = new byte[16];
random.nextBytes(keyBytes);
byte[] dataChunk = new byte[dataSize];
random.nextBytes(dataChunk);
SecretKey key = new SecretKeySpec(keyBytes, "AES");
// re-use key bytes as IV as the real test is buffer calculation
GCMParameterSpec s = new GCMParameterSpec(tagLen, keyBytes);
/*
* Iterate through various sizes to make sure that the code works with
* internal temp buffer size 4096.
*/
for (int t = 1; t <= multiples; t++) {
int size = t * dataSize;
System.out.println("\nTesting data size: " + size);
try {
decrypt(cipher, key, s, dataChunk, t,
ByteBuffer.allocate(dataSize),
ByteBuffer.allocate(size),
ByteBuffer.allocateDirect(dataSize),
ByteBuffer.allocateDirect(size));
} catch (Exception e) {
System.out.println("\tFailed with data size " + size);
failedOnce = true;
failedReason = e;
}
}
if (failedOnce) {
throw failedReason;
}
System.out.println("\n=> Passed...");
}
private enum TestVariant {
HEAP_HEAP, HEAP_DIRECT, DIRECT_HEAP, DIRECT_DIRECT
};
private static void decrypt(Cipher cipher, SecretKey key,
GCMParameterSpec s, byte[] dataChunk, int multiples,
ByteBuffer heapIn, ByteBuffer heapOut, ByteBuffer directIn,
ByteBuffer directOut) throws Exception {
ByteBuffer inBB = null;
ByteBuffer outBB = null;
// try various combinations of input/output
for (TestVariant tv : TestVariant.values()) {
System.out.println(" " + tv);
switch (tv) {
case HEAP_HEAP:
inBB = heapIn;
outBB = heapOut;
break;
case HEAP_DIRECT:
inBB = heapIn;
outBB = directOut;
break;
case DIRECT_HEAP:
inBB = directIn;
outBB = heapOut;
break;
case DIRECT_DIRECT:
inBB = directIn;
outBB = directOut;
break;
}
// prepare input and output buffers
inBB.clear();
inBB.put(dataChunk);
outBB.clear();
try {
// Always re-init the Cipher object so cipher is in
// a good state for future testing
cipher.init(Cipher.DECRYPT_MODE, key, s);
for (int i = 0; i < multiples; i++) {
inBB.flip();
cipher.update(inBB, outBB);
if (inBB.hasRemaining()) {
throw new Exception("buffer not empty");
}
}
// finish decryption and process all data buffered
cipher.doFinal(inBB, outBB);
throw new RuntimeException("Error: doFinal completed without exception");
} catch (AEADBadTagException ex) {
System.out.println("Expected AEADBadTagException thrown");
continue;
}
}
}
}
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