ren.hankai.cordwood.core.util.EncryptionUtil.java Source code

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Here is the source code for ren.hankai.cordwood.core.util.EncryptionUtil.java

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/*******************************************************************************
 * Copyright (C) 2018 hankai
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 ******************************************************************************/

package ren.hankai.cordwood.core.util;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * 
 *
 * @author hankai
 * @version 1.0.0
 * @since Jun 28, 2016 10:57:29 AM
 */
public class EncryptionUtil {

    private static final Logger logger = LoggerFactory.getLogger(EncryptionUtil.class);

    /**
     * AES /?128?256?256??JRE??
     *
     * @param value 
     * @param sk 16?128?
     * @param encrypt truefalse
     * @return base64 ?'+''/'?'-''_'
     * @author hankai
     * @since Jun 28, 2016 1:21:55 PM
     */
    public static String aes(String value, String sk, boolean encrypt) {
        try {
            final IvParameterSpec iv = new IvParameterSpec("RandomInitVector".getBytes("UTF-8"));
            final SecretKeySpec skeySpec = new SecretKeySpec(sk.getBytes("UTF-8"), "AES");
            final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
            if (encrypt) {
                cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
                final byte[] encrypted = cipher.doFinal(value.getBytes());
                String result = Base64.encodeBase64String(encrypted);
                result = result.replaceAll("\\+", "-");
                result = result.replaceAll("/", "_");
                return result;
            } else {
                cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
                value = value.replaceAll("-", "+");
                value = value.replaceAll("_", "/");
                final byte[] original = cipher.doFinal(Base64.decodeBase64(value));
                return new String(original);
            }
        } catch (final Exception ex) {
            logger.error(String.format("AES encryption failed! %s\n{ Value: %s, sk: %s, encrypt:%s }\n",
                    ex.getMessage(), value, sk, encrypt));
        }
        return null;
    }
}