public static string GetOtp(string deviceId)
{
var otp = RandomGenerator.GenerateString(16);
OtpCache.Set(otp, deviceId, TimeSpan.FromMinutes(1));
return(otp);
}
public static bool OtpMatchesDevice(string otp, string deviceId)
{
if (OtpCache.TryGetValue(otp, out string cachedDevice) &&
cachedDevice == deviceId)
{
return(true);
}
return(false);
}
public void OnAuthorization(AuthorizationFilterContext context)
{
if (!AppConfig.RemoteControlRequiresAuthentication)
{
return;
}
if (context.HttpContext.User.Identity.IsAuthenticated)
{
return;
}
if (context.HttpContext.Request.Query.TryGetValue("otp", out var otp) &&
OtpCache.TryGetValue(otp.ToString(), out _))
{
return;
}
context.Result = new RedirectToPageResult("/Account/Login", new { area = "Identity" });
}