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/*
* Copyright (c) 2012, 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.
*/
/*
* @author Valerie PENG
* @author Yun Ke
* @author Alexander Fomin
* @author rhalade
*/
import java.security.spec.AlgorithmParameterSpec;
import java.util.StringTokenizer;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.Provider;
import java.io.PrintStream;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class PBECipherWrapper extends PBEWrapper {
private final AlgorithmParameterSpec aps;
public PBECipherWrapper(
Provider p, String algo, String passwd, PrintStream out)
throws Exception {
super(algo,
SecretKeyFactory.getInstance(
new StringTokenizer(algo, "/").nextToken(), p).generateSecret(
new PBEKeySpec(passwd.toCharArray())),
Cipher.getInstance(algo, p), out);
int SALT_SIZE = 8;
aps = new PBEParameterSpec(generateSalt(SALT_SIZE), ITERATION_COUNT);
}
@Override
public boolean execute(int edMode, byte[] inputText, int offset,
int len) {
StringTokenizer st = new StringTokenizer(algo, "/");
String baseAlgo = st.nextToken().toUpperCase();
boolean isUnlimited;
try {
isUnlimited =
(Cipher.getMaxAllowedKeyLength(this.algo) == Integer.MAX_VALUE);
} catch (NoSuchAlgorithmException nsae) {
out.println("Got unexpected exception for " + this.algo);
nsae.printStackTrace(out);
return false;
}
// Perform encryption or decryption depends on the specified edMode
try {
ci.init(edMode, key, aps);
if ((baseAlgo.endsWith("TRIPLEDES")
|| baseAlgo.endsWith("AES_256")) && !isUnlimited) {
out.print("Expected InvalidKeyException not thrown: "
+ this.algo);
return false;
}
// First, generate the cipherText at an allocated buffer
byte[] outputText = ci.doFinal(inputText, offset, len);
// Second, generate cipherText again at the same buffer of
// plainText
int myoff = offset / 2;
int off = ci.update(inputText, offset, len, inputText, myoff);
ci.doFinal(inputText, myoff + off);
// Compare to see whether the two results are the same or not
boolean result = equalsBlock(inputText, myoff, outputText, 0,
outputText.length);
return result;
} catch (Exception ex) {
if ((ex instanceof InvalidKeyException) &&
(baseAlgo.endsWith("TRIPLEDES")
|| baseAlgo.endsWith("AES_256")) &&
!isUnlimited) {
out.println("Expected InvalidKeyException thrown for "
+ algo);
return true;
} else {
out.println("Got unexpected exception for " + algo);
ex.printStackTrace(out);
return false;
}
}
}
}
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