using System;

using System.Text;

using System.Security.Cryptography;         

public class Program

{

    public class CrytalEncryptSDT

    {

        private static string key = "@WS@#20@##30213123X";

        /// <summary>

        /// Encrypt a string using dual encryption method. Return a encrypted cipher Text

        /// </summary>

        /// <param name="toEncrypt">string to be encrypted</param>

        /// <param name="useHashing">use hashing? send to for extra secirity</param>

        /// <returns></returns>

        public static string Encrypt(string toEncrypt, bool useHashing)

        {

            byte[] keyArray;

            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

​

            // Get the key from config file

​

​

            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();

            keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));

            hashmd5.Clear();

            tdes.Key = keyArray;

            tdes.Mode = CipherMode.ECB;

            tdes.Padding = PaddingMode.PKCS7;

​

            ICryptoTransform cTransform = tdes.CreateEncryptor();

            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            tdes.Clear();

​

            //System.Windows.Forms.MessageBox.Show(key);

            if (useHashing)

            {

​

                MD5CryptoServiceProvider hashmd51 = new MD5CryptoServiceProvider();

                var stringEncrypt = Convert.ToBase64String(resultArray, 0, resultArray.Length);

                var result = hashmd51.ComputeHash(UTF8Encoding.UTF8.GetBytes(stringEncrypt));

                hashmd51.Clear();

                return Convert.ToBase64String(result, 0, result.Length);

            }

            else

                return Convert.ToBase64String(resultArray, 0, resultArray.Length);

​

​

        }

        /// <summary>

        /// DeCrypt a string using dual encryption method. Return a DeCrypted clear string

        /// </summary>

        /// <param name="cipherString">encrypted string</param>

        /// <param name="useHashing">Did you use hashing to encrypt this data? pass true is yes</param>

        /// <returns></returns>

        public static string Decrypt(string cipherString)

        {

            byte[] keyArray;

            byte[] toEncryptArray = Convert.FromBase64String(cipherString);

​

            //Get your key from config file to open the lock!

​

​

            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();

            keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));

            hashmd5.Clear();

​

            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

            tdes.Key = keyArray;

            tdes.Mode = CipherMode.ECB;

            tdes.Padding = PaddingMode.PKCS7;

​

            ICryptoTransform cTransform = tdes.CreateDecryptor();

            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

​

            tdes.Clear();

            return UTF8Encoding.UTF8.GetString(resultArray);

        }

    }

    public static void Main()

    {

        var item = "0357818605";

        var sdt = CrytalEncryptSDT.Encrypt(item,true);

        Console.WriteLine(sdt);

    }

}