com.sds.acube.ndisc.xnapi.XNApiDesCipher.java Source code

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Here is the source code for com.sds.acube.ndisc.xnapi.XNApiDesCipher.java

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/*
 * <pre>
 * Copyright (c) 2014 Samsung SDS.
 * All right reserved.
 *
 * This software is the confidential and proprietary information of Samsung
 * SDS. You shall not disclose such Confidential Information and
 * shall use it only in accordance with the terms of the license agreement
 * you entered into with Samsung SDS.
 *
 * Author             : Takkies
 * Date                : 2014. 04. 01.
 * Description      : 
 * </pre>
 */
package com.sds.acube.ndisc.xnapi;

import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;

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

/**
 * XNApi  (DES3 ?)
 * 
 * @author Takkies
 *
 */
public class XNApiDesCipher {

    /**
     * 
     * 
     * @param data  ?
     * @return  ?
     */
    public static String decrypt(String data) {
        try {
            Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, getKey());
            byte d[] = cipher.doFinal(Base64.decodeBase64(data.getBytes()));
            return new String(d);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 
     * 
     * @param data  ?
     * @return  ?
     */
    public static String encrypt(String data) {
        try {
            Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, getKey());
            byte e[] = cipher.doFinal(data.getBytes());
            return Base64.encodeBase64String(e);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     *   ?<br>
     * 3DES ?? 24bit KEY ?<br>
     * DES ??  16bit KEY ?.<br>
     * 
     * @return 
     */
    private static Key getKey() {
        String key = "x0134-ad17s658601j56-q75k2we0des-key".substring(0, 24); // ??   .
        try {
            DESedeKeySpec desKeySpec = new DESedeKeySpec(key.getBytes());
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
            return keyFactory.generateSecret(desKeySpec);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String args[]) {
        String data = "sds000";

        String enc = encrypt(data);
        System.out.println("encrypt : " + enc);
        String dec = decrypt("7eau4E0t1U0=");
        System.out.println("decrypt : " + dec);
    }
}