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/*
* Copyright (c) 2007, 2015, 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.
*/
import java.security.AlgorithmParameters;
import java.security.GeneralSecurityException;
import java.security.Provider;
import java.security.Security;
import javax.crypto.SecretKey;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
/**
* Wrapper class to test a given AES-based PBE algorithm.
*/
public class AESPBEWrapper extends AbstractPBEWrapper {
/**
* the algorithm parameters.
*/
private AlgorithmParameters pbeParams;
/**
* the encryption key.
*/
private final SecretKey key;
/**
* The Wrapper constructor. Instantiate Cipher using the given AES-based PBE
* algorithm.
*
* @param algo AES-based PBE algorithm.
* @param passwd password phrase.
* @throws GeneralSecurityException all security exceptions are thrown.
*/
public AESPBEWrapper(PBEAlgorithm algo, String passwd)
throws GeneralSecurityException {
// salt and iteration count will be generated during encryption
super(algo, passwd, 0);
// Generate secret key. We expect no mode and padding specified.
SecretKeyFactory skf = SecretKeyFactory.getInstance(algo.baseAlgo);
key = skf.generateSecret(new PBEKeySpec(passwd.toCharArray()));
}
/**
* Initiate the Cipher object using given "mode".
* @return a cipher object.
* @throws GeneralSecurityException all security exceptions are thrown.
*/
@Override
protected Cipher initCipher(int mode) throws GeneralSecurityException {
Provider provider = Security.getProvider("SunJCE");
if (provider == null) {
throw new RuntimeException("SunJCE provider does not exist.");
}
// get Cipher instance
Cipher ci = Cipher.getInstance(transformation, provider);
if (Cipher.ENCRYPT_MODE == mode) {
ci.init(Cipher.ENCRYPT_MODE, key);
pbeParams = ci.getParameters();
} else {
ci.init(Cipher.DECRYPT_MODE, key, pbeParams);
}
return ci;
}
}
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