public string Generate(string userName)
{
var hash = CryptoProvider.CalculateHash(userName);
var message = string.Format("{0,-30}{1,-20}{2}", hash, DateTime.Now.Ticks, userName);
var encMessage = CryptoProvider.Encrypt(message);
return(encMessage);
}
public string Decode(string token)
{
if (Cache.Contains(token))
{
return(Cache.Get(token) as string);
}
var message = CryptoProvider.Decrypt(token);
// check the hash and confirm that the message is valid
var hash = message.Substring(0, 30).Trim();
var userName = message.Substring(50).Trim();
if (hash != CryptoProvider.CalculateHash(userName))
{
throw new Exception("Unable to verify message token");
}
Cache.Add(token, userName, DateTimeOffset.Now.AddHours(-1));
return(userName);
}