com.formatAdmin.utils.UtilsSecurity.java Source code

Introduction

Here is the source code for com.formatAdmin.utils.UtilsSecurity.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.formatAdmin.utils;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

/**
 *
 * @author Ulises Beltrn Gmez --- beltrangomezulises@gmail.com
 */
public class UtilsSecurity {

    /**
     * SYMETRIC ENCRYPTION
     */
    private static final String SECRET_MD5_KEY = "secrect ultra private string key";
    private static final String ENCRYPT_ALGORITHM = "DESede";

    public static String cifrarMD5(String texto) {
        String base64EncryptedString = "";
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] digestOfPassword = md.digest(SECRET_MD5_KEY.getBytes("utf-8"));
            byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

            SecretKey key = new SecretKeySpec(keyBytes, ENCRYPT_ALGORITHM);
            Cipher cipher = Cipher.getInstance(ENCRYPT_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, key);

            byte[] plainTextBytes = texto.getBytes("utf-8");
            byte[] buf = cipher.doFinal(plainTextBytes);
            byte[] base64Bytes = Base64.encodeBase64(buf);
            base64EncryptedString = new String(base64Bytes);

        } catch (UnsupportedEncodingException | InvalidKeyException | NoSuchAlgorithmException | BadPaddingException
                | IllegalBlockSizeException | NoSuchPaddingException ex) {
        }
        return base64EncryptedString;
    }

    public static String decifrarMD5(String textoEncriptado) throws Exception {
        String base64EncryptedString = "";

        try {
            byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] digestOfPassword = md.digest(SECRET_MD5_KEY.getBytes("utf-8"));
            byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
            SecretKey key = new SecretKeySpec(keyBytes, ENCRYPT_ALGORITHM);

            Cipher decipher = Cipher.getInstance(ENCRYPT_ALGORITHM);
            decipher.init(Cipher.DECRYPT_MODE, key);

            byte[] plainText = decipher.doFinal(message);

            base64EncryptedString = new String(plainText, "UTF-8");

        } catch (UnsupportedEncodingException | InvalidKeyException | NoSuchAlgorithmException | BadPaddingException
                | IllegalBlockSizeException | NoSuchPaddingException ex) {
            throw ex;
        }
        return base64EncryptedString;
    }

}