org.apache.juddi.v3.client.cryptor.DefaultCryptor.java Source code

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Here is the source code for org.apache.juddi.v3.client.cryptor.DefaultCryptor.java

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/*
 * 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.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 {
        byte[] encs = crypt(Cipher.ENCRYPT_MODE, str.getBytes());
        encs = Base64.encodeBase64(encs);
        return new String(encs);
    }

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

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

}