104 lines
3.4 KiB
Java
104 lines
3.4 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 javax.crypto.Cipher;
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/**
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* PBEWrapper is an abstract class for all concrete PBE Cipher wrappers.
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*/
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public abstract class AbstractPBEWrapper {
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/**
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* Iteration count.
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*/
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public static final int DEFAULT_ITERATION = 1000;
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public static final String PBKDF2 = "PBKDF2";
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public static final String AES = "AES";
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public static final String DEFAULT = "default";
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/**
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* transformation the name of the transformation, e.g.,
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* DES/CBC/PKCS5Padding
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*/
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protected final String transformation;
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/**
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* the standard name of the requested secret-key algorithm.
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*/
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protected final String baseAlgo;
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/**
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* The contents of salt are copied to protect against subsequent
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* modification.
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*/
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protected final byte[] salt;
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/**
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* Password.
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*/
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protected final String password;
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/**
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* PBEWrapper creator.
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*
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* @param algo PBE algorithm to test
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* @param passwd a password phrase
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* @return PBEWrapper in accordance to requested algo.
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* @throws GeneralSecurityException all exceptions are thrown.
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*/
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public static AbstractPBEWrapper createWrapper(PBEAlgorithm algo, String passwd)
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throws GeneralSecurityException {
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switch (algo.type) {
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case PBKDF2:
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return new PBKDF2Wrapper(algo, passwd);
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case AES:
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return new AESPBEWrapper(algo, passwd);
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default:
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return new DefaultPBEWrapper(algo, passwd);
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}
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}
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/**
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* PBEWrapper constructor.
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*
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* @param algo algorithm to wrap
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* @param password password phrase
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* @param saltSize salt size (defined in subclasses)
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*/
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protected AbstractPBEWrapper(PBEAlgorithm algo, String password, int saltSize) {
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this.transformation = algo.getTransformation();
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this.baseAlgo = algo.baseAlgo;
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this.salt = TestUtilities.generateBytes(saltSize);
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this.password = password;
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}
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/**
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* Initialize Cipher object for the operation requested in the mode parameter.
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*
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* @param mode encryption or decryption
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* @return a cipher initialize by mode.
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* @throws GeneralSecurityException all security exceptions are thrown.
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*/
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protected abstract Cipher initCipher(int mode) throws GeneralSecurityException;
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}
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