private static string decryptSeed(int userId)
{
byte[] seed = retrieveSeed(userId);
string seedBase32 = null;
using (Aes AES = Aes.Create())
{
AES.KeySize = 256;
AES.BlockSize = 128;
AES.Key = PrivateKey.privKey;
AES.IV = PrivateKey.privIV;
AES.Mode = CipherMode.CBC;
using (var msEncrypt = new MemoryStream())
{
using (var cs = new CryptoStream(msEncrypt, AES.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(seed, 0, seed.Length);
cs.Close();
}
seed = msEncrypt.ToArray();
}
seedBase32 = Base32.ToBase32String(seed);
}
return(seedBase32);
}
static void Main(string[] args)
{
var KEY = "12345678901234567890".Select(m => (byte)m).ToArray();
Console.Error.WriteLine(Base32.ToBase32String(KEY));
//*
do
{
Console.Clear();
Console.Error.WriteLine("TOTP Generated:\t{0}", DateTime.Now.ToLongTimeString());
var CurrentOffset = HOTP.GetCounter() - 5;
for (var i = 0; i < 5; i++)
{
Console.Error.WriteLine("TOTP Counter:\t{0}", CurrentOffset + i);
Console.Error.WriteLine("TOTP Token:\t{0:000000}", HOTP.GetHOTP(KEY, CurrentOffset + i));
}
}while (Console.ReadKey(true).Key != ConsoleKey.Escape);
//*/
Console.Error.WriteLine("#END");
Console.ReadKey(true);
}
public static string ToBase32String(byte[] data)
{
return(Base32.ToBase32String(data));
}