72 lines
2.6 KiB
Java
72 lines
2.6 KiB
Java
/*
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* Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.security.GeneralSecurityException;
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import java.security.Provider;
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import java.security.Security;
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import javax.crypto.SecretKey;
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import javax.crypto.Cipher;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.PBEKeySpec;
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import javax.crypto.spec.PBEParameterSpec;
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/**
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* Default wrapper for a password based encryption Cipher.
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*/
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public class DefaultPBEWrapper extends AbstractPBEWrapper {
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/**
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* Define default SALT size as 8.
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*/
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private static final int PBE_SALT_SIZE = 8;
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/**
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* Default PBE wrapper constructor.
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*
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* @param algo PGE algorithm to wrap.
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* @param passwd password phrase
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*/
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public DefaultPBEWrapper(PBEAlgorithm algo, String passwd) {
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super(algo, passwd, PBE_SALT_SIZE);
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}
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/**
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* Instantiate Cipher for the PBE algorithm.
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*
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* @param mode Cipher mode: encrypt or decrypt.
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* @return Cipher in accordance to the PBE algorithm
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* @throws java.security.GeneralSecurityException
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*/
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@Override
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protected Cipher initCipher(int mode) throws GeneralSecurityException {
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Provider provider = Security.getProvider("SunJCE");
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if (provider == null) {
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throw new RuntimeException("SunJCE provider does not exist.");
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}
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SecretKey key = SecretKeyFactory.getInstance(baseAlgo)
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.generateSecret(new PBEKeySpec(password.toCharArray()));
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Cipher ci = Cipher.getInstance(transformation, provider);
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ci.init(mode, key, new PBEParameterSpec(salt, DEFAULT_ITERATION));
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return ci;
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}
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}
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