/// <summary>
///
/// </summary>
/// <returns></returns>
public bool HasRequestValidCaptchaEntry(
Language captchaGeneratorLanguage,
DisplayMode captchaGeneratorDisplayMode,
DNTCaptchaBase model = null)
{
var httpContext = _contextAccessor.HttpContext;
if (!shouldValidate(httpContext))
{
_logger.LogDebug($"Ignoring ValidateDNTCaptcha during `{httpContext.Request.Method}`.");
return(true);
}
var(captchaText, inputText, cookieToken) = getFormValues(httpContext, model);
if (string.IsNullOrEmpty(captchaText))
{
_logger.LogDebug("CaptchaHiddenInput is empty.");
return(false);
}
if (string.IsNullOrEmpty(inputText))
{
_logger.LogDebug("CaptchaInput is empty.");
return(false);
}
inputText = inputText.ToEnglishNumbers();
if (!long.TryParse(
inputText,
NumberStyles.AllowDecimalPoint | NumberStyles.AllowThousands,
CultureInfo.InvariantCulture,
out long inputNumber))
{
_logger.LogDebug("inputText is not a number.");
return(false);
}
var decryptedText = _captchaProtectionProvider.Decrypt(captchaText);
var numberToText = _captchaTextProvider(captchaGeneratorDisplayMode).GetText(inputNumber, captchaGeneratorLanguage);
if (decryptedText?.Equals(numberToText) != true)
{
_logger.LogDebug($"{decryptedText} != {numberToText}");
return(false);
}
if (!isValidCookie(httpContext, decryptedText, cookieToken))
{
return(false);
}
return(true);
}
public bool HasRequestValidCaptchaEntry(Language captchaGeneratorLanguage, DisplayMode captchaGeneratorDisplayMode, DNTCaptchaBase model = null)
{
return(true);
}
private (string captchaText, string inputText, string cookieToken) getFormValues(HttpContext httpContext, DNTCaptchaBase model)
{
if (httpContext.Request.HasFormContentType)
{
var form = httpContext.Request.Form;
form.CheckArgumentNull(nameof(form));
var captchaText = (string)form[DNTCaptchaTagHelper.CaptchaHiddenInputName];
var inputText = (string)form[DNTCaptchaTagHelper.CaptchaInputName];
var cookieToken = (string)form[DNTCaptchaTagHelper.CaptchaHiddenTokenName];
return(captchaText, inputText, cookieToken);
}
if (model == null)
{
throw new NullReferenceException("Your ViewModel should implement the DNTCaptchaBase class (public class AccountViewModel : DNTCaptchaBase {}).");
}
return(model.DNTCaptchaText, model.DNTCaptchaInputText, model.DNTCaptchaToken);
}
