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 */ 23import java.security.GeneralSecurityException; 24import java.security.Provider; 25import java.security.Security; 26import javax.crypto.SecretKey; 27import javax.crypto.Cipher; 28import javax.crypto.SecretKeyFactory; 29import javax.crypto.spec.PBEKeySpec; 30import javax.crypto.spec.PBEParameterSpec; 31 32/** 33 * Default wrapper for a password based encryption Cipher. 34 */ 35 36public 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} 72