DefaultCryptor.java

/*
 * Copyright 2001-2008 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.apache.juddi.v3.client.cryptor;

import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

import org.apache.commons.codec.binary.Base64;

/**
 * @author Anou Manavalan
 */
public class DefaultCryptor implements Cryptor {

        private PBEKeySpec pbeKeySpec = null;
        private PBEParameterSpec pbeParamSpec = null;
        private SecretKeyFactory keyFac = null;
        private SecretKey pbeKey = null;

        // Salt
        private byte[] salt = {
                (byte) 0xc7, (byte) 0x73, (byte) 0x21, (byte) 0x8c,
                (byte) 0x7e, (byte) 0xc8, (byte) 0xee, (byte) 0x99
        };

        // Iteration count
        private int count = 20;

        /**
         * Constructor for DefaultCryptor.
         */
        public DefaultCryptor()
             throws NoSuchAlgorithmException, InvalidKeySpecException {
                // Create PBE parameter set
                pbeParamSpec = new PBEParameterSpec(salt, count);
                pbeKeySpec = new PBEKeySpec("saagar".toCharArray());
                keyFac = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
                pbeKey = keyFac.generateSecret(pbeKeySpec);
        }

        /**
         * Encrypt the string
         */
        private byte[] crypt(int cipherMode, byte[] text)
             throws NoSuchPaddingException,
             NoSuchAlgorithmException,
             InvalidAlgorithmParameterException,
             InvalidKeyException,
             IllegalBlockSizeException,
             BadPaddingException {
                // Create PBE Cipher
                Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");

                // Initialize PBE Cipher with key and parameters
                pbeCipher.init(cipherMode, pbeKey, pbeParamSpec);

    //byte[] text = str.getBytes();
                // Encrypt/Decrypt the string
                byte[] cryptext = pbeCipher.doFinal(text);

                return cryptext;
        }

        /**
         * Encrypt the string
         */
        public String encrypt(String str)
             throws NoSuchPaddingException,
             NoSuchAlgorithmException,
             InvalidAlgorithmParameterException,
             InvalidKeyException,
             IllegalBlockSizeException,
             BadPaddingException,
             UnsupportedEncodingException {
                byte[] encs = crypt(Cipher.ENCRYPT_MODE, str.getBytes());
                encs = Base64.encodeBase64(encs);
                return new String(encs, "UTF-8");
        }

        public String decrypt(String str) throws NoSuchPaddingException,
             NoSuchAlgorithmException,
             InvalidAlgorithmParameterException,
             InvalidKeyException,
             IllegalBlockSizeException,
             BadPaddingException,
             UnsupportedEncodingException {
                byte[] encs = crypt(Cipher.DECRYPT_MODE, Base64.decodeBase64(str.getBytes("UTF-8")));
                return new String(encs, "UTF-8");
        }

        @Override
        public String newKey() {
                throw new UnsupportedOperationException("Not supported yet."); 
        }

}