com.fiorano.openesb.utils.crypto.StringEncrypter.java Source code

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Here is the source code for com.fiorano.openesb.utils.crypto.StringEncrypter.java

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/*
 * Copyright (c) Fiorano Software and affiliates. All rights reserved. http://www.fiorano.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package com.fiorano.openesb.utils.crypto;

import org.apache.commons.lang3.StringUtils;

public class StringEncrypter {

    private static ICustomEncryptor defaultInstance;
    private static String encryptionKey = CommonConstants.DEFAULT_ENCRYPTION_KEY;
    private static String oldkey = CommonConstants.DEFAULT_ENCRYPTION_KEY;
    private static String newKey = CommonConstants.DEFAULT_ENCRYPTION_KEY;

    public static void setEncryptionKey(String encryptionKey) {
        oldkey = StringEncrypter.encryptionKey;
        StringEncrypter.encryptionKey = encryptionKey;
        newKey = encryptionKey;
    }

    public static void resetEncryptionKey() {
        oldkey = StringEncrypter.encryptionKey;
        StringEncrypter.encryptionKey = CommonConstants.DEFAULT_ENCRYPTION_KEY;
        newKey = CommonConstants.DEFAULT_ENCRYPTION_KEY;
    }

    public static ICustomEncryptor getDefaultInstance() throws StringEncrypter.EncryptionException {
        if (defaultInstance == null || !oldkey.equals(newKey))
            defaultInstance = new CustomEncryptorDefaultImpl(CommonConstants.AES_ENCRYPTION_SCHEME, encryptionKey);
        return defaultInstance;
    }

    public static ICustomEncryptor getDefaultInstance(String customClass)
            throws StringEncrypter.EncryptionException {
        try {

            if (!StringUtils.isEmpty(customClass)) {
                return (ICustomEncryptor) Thread.currentThread().getContextClassLoader().loadClass(customClass)
                        .newInstance();
            } else {
                return getDefaultInstance();
            }
        } catch (ClassNotFoundException ex) {
            throw new StringEncrypter.EncryptionException(ex);
        } catch (InstantiationException e) {
            throw new StringEncrypter.EncryptionException(e);
        } catch (IllegalAccessException e) {
            throw new StringEncrypter.EncryptionException(e);
        }
    }

    /**
     * wrapper exception class
     */
    public static class EncryptionException extends Exception {
        public EncryptionException(Throwable t) {
            super(t);
        }
    }

}