using System;

using System.Collections.Generic;

using System.Security.Cryptography;

using System.Text;

using System.Collections;

​

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        string key = "5TZVRRJTOK6JUFFHCYATVY30";

        string plaintext = "{\"EVENT\":\"CONN\",\"MERCHANT_OUTLET_ID\": \"333333333333333333333\",\"MERCHANT_ID\": \"123456789088888\",\"CLIENT_ID\": \"1111\"}";

​

        string finalString = Encrypt(key, plaintext);

​

        Console.WriteLine(finalString);

    }

    public static string Tmp(string key, string plaintext){

                TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();

        MD5CryptoServiceProvider md5Provider = new MD5CryptoServiceProvider();

​

        desProvider.Key = md5Provider.ComputeHash(UnicodeEncoding.Unicode.GetBytes(key));

        desProvider.Mode = CipherMode.ECB;

​

        ICryptoTransform desEncrypt = desProvider.CreateEncryptor();

        byte[] buffer = UnicodeEncoding.Unicode.GetBytes(plaintext);

​

        byte[] tdesBytes = desEncrypt.TransformFinalBlock(buffer, 0, buffer.Length);

        string finalString = Convert.ToBase64String(tdesBytes);

        return finalString;

    }

    public static string Encrypt (string encryptionKey ,string textToEncrypt) {

     TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

     tdes.Key = Encoding.ASCII.GetBytes (encryptionKey);

     tdes.IV = new byte []{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

     byte [] tringBytes = Encoding.UTF8.GetBytes(textToEncrypt);

     string st = Convert.ToBase64String(tdes.CreateEncryptor().TransformFinalBlock(tringBytes,0, tringBytes.Length));

     byte [] toBytes = Encoding.ASCII.GetBytes(st);

     string s = BitConverter.ToString( toBytes ).Replace("-","").ToLower();

     Decrypt (encryptionKey,s);

     return s;

    }

​

    public static string Decrypt (string encryptionKey ,string textToDecrypt) {

     TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();

     des.Key = Encoding.ASCII.GetBytes(encryptionKey);

     des.IV = new byte []{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

     byte [] fromByte = StringToByteArray(textToDecrypt);

     string st = Encoding.ASCII.GetString(fromByte);

     byte [] stringBytes = Convert.FromBase64String(st);

     return Encoding.ASCII.GetString(des.CreateDecryptor().TransformFinalBlock(stringBytes,0,stringBytes.Length));

    }

    public static byte [] StringToByteArray (string hex) {

     return Enumerable.Range (0,hex.Length)

     . Where (x => x % 2 == 0)

     . Select (x => Convert . ToByte ( hex.Substring(x, 2), 16))

     . ToArray();

​

    }   

​

}