Hack23/cia

/*
 * Copyright 2010-2021 James Pether Sörling
 *
 * 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.
 *
 *    $Id$
 *  $HeadURL$
*/
package com.hack23.cia.encryption.properties;

import java.security.Security;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.jasypt.encryption.pbe.StandardPBEStringEncryptor;

/**
 * The Class EncryptProperty.
 */
public final class EncryptProperty {

    /** The Constant EXPECTED_NUMBER_ARGS. */
    private static final int EXPECTED_NUMBER_ARGS = 2;

    /** The Constant PBEWITHSHA256AND128BITAES_CBC_BC. */
    private static final String PBEWITHSHA256AND128BITAES_CBC_BC = "PBEWITHSHA256AND128BITAES-CBC-BC";

    /** The Constant BC_PROVIDER_NAME. */
    private static final String BC_PROVIDER_NAME = "BC";

    /** The Constant ENC_CONTENT_SUFFIX. */
    private static final String ENC_CONTENT_SUFFIX = ")";

    /** The Constant ENC_CONTENT_PREFIX. */
    private static final String ENC_CONTENT_PREFIX = "ENC(";

    /** The Constant ENCRYPTED_PROPERTY_VALUE. */
    private static final String ENCRYPTED_PROPERTY_VALUE = "Encrypted property value:";

    /** The Constant ENCRYPTED_VALUE. */
    private static final String ENCRYPTED_VALUE = "Encrypted value:";

    /** The Constant HELP_MESSAGE. */
    private static final String HELP_MESSAGE = "Encrypt property value with PBEWITHSHA256AND128BITAES_CBC_BC, using symmetric key and value as arguments. ./encryptProperty [key] [value]";


    /**
     * Instantiates a new encrypt property.
     */
    public EncryptProperty() {
        super();
    }

    /**
     * The main method.
     *
     * @param args the arguments
     */
    public static void main(final String[] args) {
        if (args.length == EXPECTED_NUMBER_ARGS) {
            final String encryptValue = EncryptProperty.encryptValue(args[0], args[1]);
            System.out.println(ENCRYPTED_VALUE +encryptValue);
            System.out.println(ENCRYPTED_PROPERTY_VALUE + ENC_CONTENT_PREFIX +encryptValue +ENC_CONTENT_SUFFIX);
        } else {
            System.out.println(HELP_MESSAGE);
        }
    }

    /**
     * Encrypt value.
     *
     * @param symmetricKey
     *            the symmetric key
     * @param value
     *            the value
     * @return the string
     */
    public static String encryptValue(final String symmetricKey,final String value) {
        return getEncryptor(symmetricKey).encrypt(value);

    }

    /**
     * Gets the encryptor.
     *
     * @param symmetricKey
     *            the symmetric key
     * @return the encryptor
     */
    private static StandardPBEStringEncryptor getEncryptor(final String symmetricKey) {
        Security.addProvider(new BouncyCastleProvider());
        final StandardPBEStringEncryptor mySecondEncryptor = new StandardPBEStringEncryptor();
        mySecondEncryptor.setProviderName(BC_PROVIDER_NAME);
        mySecondEncryptor.setAlgorithm(PBEWITHSHA256AND128BITAES_CBC_BC);
        mySecondEncryptor.setPassword(symmetricKey);
        return mySecondEncryptor;
    }


    /**
     * Decrypt value.
     *
     * @param symmetricKey
     *            the symmetric key
     * @param value
     *            the value
     * @return the string
     */
    public static String decryptValue(final String symmetricKey,final String value) {
        return getEncryptor(symmetricKey).decrypt(value);

    }

}