hkqldap.CR

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

public class CR
{
    private const string K = "667912";

    private const string I = "1L1SA61493DRV53Z";

    private const string SA = "1313Rf99";

    public static string DS(string EncryptedString)
    {
        if (string.IsNullOrEmpty(EncryptedString))
        {
            return string.Empty;
        }
        return RD(EncryptedString, "667912", "1313Rf99", 3, "1L1SA61493DRV53Z", 256);
    }

    public static string ES(string PlainString)
    {
        if (string.IsNullOrEmpty(PlainString))
        {
            return string.Empty;
        }
        return RE(PlainString, "667912", "1313Rf99", 3, "1L1SA61493DRV53Z", 256);
    }

    private static string RE(string plainText, string passPhrase, string saltValue, int passwordIterations, string initVector, int keySize)
    {
        //Discarded unreachable code: IL_00b9
        byte[] bytes = Encoding.ASCII.GetBytes(initVector);
        byte[] bytes2 = Encoding.ASCII.GetBytes(saltValue);
        byte[] bytes3 = Encoding.ASCII.GetBytes(plainText);
        Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(passPhrase, bytes2, passwordIterations);
        byte[] bytes4 = rfc2898DeriveBytes.GetBytes(checked((int)Math.Round((double)keySize / 8.0)));
        AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider();
        aesCryptoServiceProvider.Mode = CipherMode.CBC;
        ICryptoTransform transform = aesCryptoServiceProvider.CreateEncryptor(bytes4, bytes);
        using (MemoryStream memoryStream = new MemoryStream())
        {
            using (CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write))
            {
                cryptoStream.Write(bytes3, 0, bytes3.Length);
                cryptoStream.FlushFinalBlock();
                byte[] inArray = memoryStream.ToArray();
                memoryStream.Close();
                cryptoStream.Close();
                return Convert.ToBase64String(inArray);
            }
        }
    }

    private static string RD(string cipherText, string passPhrase, string saltValue, int passwordIterations, string initVector, int keySize)
    {
        byte[] bytes = Encoding.ASCII.GetBytes(initVector);
        byte[] bytes2 = Encoding.ASCII.GetBytes(saltValue);
        byte[] array = Convert.FromBase64String(cipherText);
        Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(passPhrase, bytes2, passwordIterations);
        checked
        {
            byte[] bytes3 = rfc2898DeriveBytes.GetBytes((int)Math.Round((double)keySize / 8.0));
            AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider();
            aesCryptoServiceProvider.Mode = CipherMode.CBC;
            ICryptoTransform transform = aesCryptoServiceProvider.CreateDecryptor(bytes3, bytes);
            MemoryStream memoryStream = new MemoryStream(array);
            CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Read);
            byte[] array2 = new byte[array.Length + 1];
            int count = cryptoStream.Read(array2, 0, array2.Length);
            memoryStream.Close();
            cryptoStream.Close();
            return Encoding.ASCII.GetString(array2, 0, count);
        }
    }
}