1 /*

     2  * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 import java.security.GeneralSecurityException;

    24 import java.security.Provider;

    25 import java.security.Security;

    26 import javax.crypto.SecretKey;

    27 import javax.crypto.Cipher;

    28 import javax.crypto.SecretKeyFactory;

    29 import javax.crypto.spec.PBEKeySpec;

    30 import javax.crypto.spec.PBEParameterSpec;

    31 

    32 /**

    33  * Default wrapper for a password based encryption Cipher.

    34  */

    35 

    36 public class DefaultPBEWrapper extends AbstractPBEWrapper {

    37     /**

    38      * Define default SALT size as 8.

    39      */

    40     private static final int PBE_SALT_SIZE = 8;

    41 

    42     /**

    43      * Default PBE wrapper constructor.

    44      *

    45      * @param algo PGE algorithm to wrap.

    46      * @param passwd password phrase

    47      */

    48     public DefaultPBEWrapper(PBEAlgorithm algo, String passwd) {

    49         super(algo, passwd, PBE_SALT_SIZE);

    50     }

    51 

    52     /**

    53      * Instantiate Cipher for the PBE algorithm.

    54      *

    55      * @param mode Cipher mode: encrypt or decrypt.

    56      * @return Cipher in accordance to the PBE algorithm

    57      * @throws java.security.GeneralSecurityException

    58      */

    59     @Override

    60     protected Cipher initCipher(int mode) throws  GeneralSecurityException {

    61         Provider provider = Security.getProvider("SunJCE");

    62         if (provider == null) {

    63             throw new RuntimeException("SunJCE provider does not exist.");

    64         }

    65         SecretKey key = SecretKeyFactory.getInstance(baseAlgo)

    66                 .generateSecret(new PBEKeySpec(password.toCharArray()));

    67         Cipher ci = Cipher.getInstance(transformation, provider);

    68         ci.init(mode, key, new PBEParameterSpec(salt, DEFAULT_ITERATION));

    69         return ci;

    70     }

    71 }