/// <summary>
/// Check for proper input captcha
/// </summary>
/// <param name="controllerBase"></param>
/// <param name="textError">text for error</param>
/// <returns></returns>
public static bool IsCaptchaVerify(this ControllerBase controllerBase, string textError)
{
try {
var captchaModel = new CaptchaModel {
CaptchaDeText =
controllerBase.ValueProvider.GetValue("CaptchaDeText").AttemptedValue,
CaptchaInputText =
controllerBase.ValueProvider.GetValue("CaptchaInputText").AttemptedValue
};
controllerBase.ViewData.ModelState.Remove("CaptchaDeText");
controllerBase.ViewData.ModelState.Remove("CaptchaInputText");
var isVerify = IsVerify(captchaModel);
if (!isVerify)
controllerBase.ViewData.ModelState.AddModelError("CaptchaInputText", textError);
return isVerify;
} catch (Exception) {
throw new NullReferenceException("Form not contain CaptchaModel");
}
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
try
{
ControllerBase controllerBase = filterContext.Controller;
var captchaModel = new CaptchaModel
{
CaptchaDeText =
controllerBase.ValueProvider.GetValue("CaptchaDeText").AttemptedValue,
CaptchaInputText =
controllerBase.ValueProvider.GetValue("CaptchaInputText").AttemptedValue
};
if (!CaptchaHelper.IsVerify(captchaModel))
controllerBase.ViewData.ModelState.AddModelError("CaptchaInputText", _textError);
}
catch (Exception)
{
throw new NullReferenceException("Form not contain CaptchaModel");
}
base.OnActionExecuting(filterContext);
}
public static bool Verify(CaptchaModel model)
{
return IsVerify(model);
}
/// <summary>
/// Help method for verify
/// </summary>
/// <param name="captcha"></param>
/// <returns></returns>
internal static bool IsVerify(CaptchaModel captcha)
{
try {
var encryptorModel = GetEncryptorModel();
if (encryptorModel == null)
return false;
var textDecrypt = GetEncryption().Decrypt(captcha.CaptchaDeText, encryptorModel.Password, encryptorModel.Salt);
return textDecrypt == captcha.CaptchaInputText;
} catch {
return false;
}
}