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/*
* Copyright (c) 2021, 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 8261462
* @summary Verify that after the first doFinal() decryption op, the ByteBuffer
* is properly set for the second operation.
*/
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.nio.ByteBuffer;
public class ResetByteBuffer {
Cipher c;
SecretKey key;
ByteBuffer in, out;
byte[] data = new byte[1500];
byte encrypted[];
public static final void main(String args[]) throws Exception {
// Cannot do encryption back to back with AES/GCM
// Tests GCM's ByteBuffer code
String algo = "AES/GCM/NoPadding";
new ResetByteBuffer(algo).decrypt(true).updateTest().updateTest();
new ResetByteBuffer(algo).decrypt(false).updateTest().updateTest();
new ResetByteBuffer(algo).decrypt(true).updateTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(false).updateTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(true).doFinalTest().updateTest();
new ResetByteBuffer(algo).decrypt(false).doFinalTest().updateTest();
new ResetByteBuffer(algo).decrypt(true).doFinalTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(false).doFinalTest().doFinalTest();
// Tests CipherCore code. Testing CBC should be enough to cover the
// other algorithms that use CipherCore
algo = "AES/CBC/PKCS5Padding";
new ResetByteBuffer(algo).encrypt(true).updateTest().updateTest();
new ResetByteBuffer(algo).encrypt(false).updateTest().updateTest();
new ResetByteBuffer(algo).encrypt(true).updateTest().doFinalTest();
new ResetByteBuffer(algo).encrypt(false).updateTest().doFinalTest();
new ResetByteBuffer(algo).encrypt(true).doFinalTest().updateTest();
new ResetByteBuffer(algo).encrypt(false).doFinalTest().updateTest();
new ResetByteBuffer(algo).encrypt(true).doFinalTest().doFinalTest();
new ResetByteBuffer(algo).encrypt(false).doFinalTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(true).updateTest().updateTest();
new ResetByteBuffer(algo).decrypt(false).updateTest().updateTest();
new ResetByteBuffer(algo).decrypt(true).updateTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(false).updateTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(true).doFinalTest().updateTest();
new ResetByteBuffer(algo).decrypt(false).doFinalTest().updateTest();
new ResetByteBuffer(algo).decrypt(true).doFinalTest().doFinalTest();
new ResetByteBuffer(algo).decrypt(false).doFinalTest().doFinalTest();
}
public ResetByteBuffer(String algo) throws Exception {
c = Cipher.getInstance(algo);
String a[] = algo.split("/");
KeyGenerator kg = KeyGenerator.getInstance(a[0]);
key = kg.generateKey();
// Setup encrypted data
c.init(Cipher.ENCRYPT_MODE, key, c.getParameters());
encrypted = new byte[c.getOutputSize(data.length)];
c.doFinal(data, 0, data.length, encrypted, 0);
}
ResetByteBuffer decrypt(boolean direct) throws Exception {
// allocate bytebuffers
if (direct) {
in = ByteBuffer.allocateDirect(encrypted.length);
out = ByteBuffer.allocateDirect(encrypted.length);
} else {
in = ByteBuffer.allocate(encrypted.length);
out = ByteBuffer.allocate(encrypted.length);
}
in.put(encrypted);
in.flip();
c.init(Cipher.DECRYPT_MODE, key, c.getParameters());
return this;
}
ResetByteBuffer encrypt(boolean direct) throws Exception {
// allocate bytebuffers
if (direct) {
in = ByteBuffer.allocateDirect(data.length);
out = ByteBuffer.allocateDirect(c.getOutputSize(data.length));
} else {
in = ByteBuffer.allocate(data.length);
out = ByteBuffer.allocate(c.getOutputSize(data.length));
}
c.init(Cipher.ENCRYPT_MODE, key, c.getParameters());
return this;
}
ResetByteBuffer updateTest() throws Exception {
int updateLen = data.length / 2;
in.limit(updateLen);
c.update(in, out);
in.limit(in.capacity());
c.doFinal(in, out);
if (in.capacity() != in.position()) {
System.out.println("There is data remaining in the input buffer");
}
if (out.limit() != out.position()) {
System.out.println("There is data remaining in the output buffer");
}
in.flip();
out.position(0);
out.limit(out.capacity());
return this;
}
ResetByteBuffer doFinalTest() throws Exception {
c.doFinal(in, out);
if (in.capacity() != in.position()) {
System.out.println("There is data remaining in the input buffer");
}
if (out.limit() != out.position()) {
System.out.println("There is data remaining in the output buffer");
}
in.flip();
out.position(0);
out.limit(out.capacity());
return this;
}
}
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