using System.Security.Cryptography;
public class EncriptionHelper
public static void Main()
var cleanTxt = "8212093345";
var encTxt = "EAAAADE2ODA2NjQya2JNN2M1ISShgi+Oi5tbsPgOz5KsCHj0";
var secret = "KJH#$@kds32@!kjhdkftt";
var xtxt = EncryptStringAES(cleanTxt, secret);
var txt = DecryptStringAES(encTxt, secret);
private static byte[] vector = Encoding.ASCII.GetBytes("16806642kbM7c5!$");
private static byte[] salt = new byte[] { 34, 134, 145, 12, 7, 6, 243, 63, 43, 54, 75, 65, 53, 2, 34, 54, 45, 67, 64, 64, 32, 213 };
public static string EncryptStringAES(string text, string sharedSecret)
if (string.IsNullOrEmpty(text))
throw new ArgumentNullException("Text is null or empty");
if (string.IsNullOrEmpty(sharedSecret))
throw new ArgumentNullException("Secret is null or empty");
if (salt == null || salt.Length == 0)
throw new ArgumentNullException("Salt is null or empty");
RijndaelManaged aesAlg = null;
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, salt);
aesAlg = new RijndaelManaged();
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
msEncrypt.Write(BitConverter.GetBytes(aesAlg.IV.Length), 0, sizeof(int));
msEncrypt.Write(aesAlg.IV, 0, aesAlg.IV.Length);
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
outStr = Convert.ToBase64String(msEncrypt.ToArray());
public static string DecryptStringAES(string cipherText, string sharedSecret)
if (string.IsNullOrEmpty(cipherText))
throw new ArgumentNullException("Text is null or empty");
if (string.IsNullOrEmpty(sharedSecret))
throw new ArgumentNullException("Secret is null or empty");
if (salt == null || salt.Length == 0)
throw new ArgumentNullException("Salt is null or empty");
RijndaelManaged aesAlg = null;
Rfc2898DeriveBytes key = new Rfc2898DeriveBytes(sharedSecret, salt);
byte[] bytes = Convert.FromBase64String(cipherText);
using (MemoryStream msDecrypt = new MemoryStream(bytes))
aesAlg = new RijndaelManaged();
aesAlg.Key = key.GetBytes(aesAlg.KeySize / 8);
aesAlg.IV = ReadByteArray(msDecrypt);
Console.WriteLine("KEY: "+ Convert.ToBase64String(aesAlg.Key));
Console.WriteLine("IV: "+ Convert.ToBase64String(aesAlg.IV));
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
result = srDecrypt.ReadToEnd();
private static byte[] ReadByteArray(Stream s)
byte[] rawLength = new byte[sizeof(int)];
if (s.Read(rawLength, 0, rawLength.Length) != rawLength.Length)
throw new SystemException("Stream did not contain properly formatted byte array");
byte[] buffer = new byte[BitConverter.ToInt32(rawLength, 0)];
if (s.Read(buffer, 0, buffer.Length) != buffer.Length)
throw new SystemException("Did not read byte array properly");