/// <summary>
/// Captcha validator.
/// </summary>
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
filterContext.CheckArgumentNull(nameof(filterContext));
var httpContext = filterContext.HttpContext;
httpContext.CheckArgumentNull(nameof(httpContext));
var validatorService = httpContext.RequestServices.GetService <IDNTCaptchaValidatorService>();
if (validatorService.HasRequestValidCaptchaEntry(
CaptchaGeneratorLanguage,
CaptchaGeneratorDisplayMode,
filterContext.ActionArguments.Select(item => item.Value).OfType <DNTCaptchaBase>().FirstOrDefault()))
{
base.OnActionExecuting(filterContext);
return;
}
var controllerBase = filterContext.Controller as ControllerBase;
controllerBase.CheckArgumentNull(nameof(controllerBase));
controllerBase.ModelState.AddModelError(DNTCaptchaTagHelper.CaptchaInputName, ErrorMessage);
base.OnActionExecuting(filterContext);
}
/// <summary>
/// Captcha validator.
/// </summary>
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
filterContext.CheckArgumentNull(nameof(filterContext));
var httpContext = filterContext.HttpContext;
httpContext.CheckArgumentNull(nameof(httpContext));
var(captchaText, inputText, cookieToken) = getFormValues(filterContext);
var validatorService = httpContext.RequestServices.GetService <IDNTCaptchaValidatorService>();
var result = validatorService.Validate(
httpContext,
captchaText,
inputText,
cookieToken,
CaptchaGeneratorLanguage,
ErrorMessage,
IsNumericErrorMessage,
deleteCookieAfterValidation: true);
if (result.IsValid)
{
base.OnActionExecuting(filterContext);
return;
}
var controllerBase = filterContext.Controller as ControllerBase;
controllerBase.CheckArgumentNull(nameof(controllerBase));
controllerBase.ModelState.AddModelError(DNTCaptchaTagHelper.CaptchaInputName, result.ErrorMessage);
base.OnActionExecuting(filterContext);
}
/// <summary>
/// Captcha validator.
/// </summary>
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
filterContext.CheckArgumentNull(nameof(filterContext));
var loggerFactory = filterContext.HttpContext.RequestServices.GetService <ILoggerFactory>();
var logger = loggerFactory.CreateLogger <ValidateCaptchaAttribute>();
if (!shouldValidate(filterContext))
{
logger.LogWarning($"Ignoring ValidateCaptcha during `{filterContext.HttpContext.Request.Method}`.");
base.OnActionExecuting(filterContext);
return;
}
var controllerBase = filterContext.Controller as ControllerBase;
controllerBase.CheckArgumentNull(nameof(controllerBase));
var form = filterContext.HttpContext.Request.Form;
form.CheckArgumentNull(nameof(form));
var captchaText = (string)form[CaptchaTagHelper.CaptchaHiddenInputName];
if (string.IsNullOrWhiteSpace(captchaText))
{
logger.LogWarning("CaptchaHiddenInput is empty.");
controllerBase.ModelState.AddModelError(CaptchaTagHelper.CaptchaInputName, ErrorMessage);
base.OnActionExecuting(filterContext);
return;
}
var inputText = (string)form[CaptchaTagHelper.CaptchaInputName];
if (string.IsNullOrWhiteSpace(inputText))
{
logger.LogWarning("CaptchaInput is empty.");
controllerBase.ModelState.AddModelError(CaptchaTagHelper.CaptchaInputName, ErrorMessage);
base.OnActionExecuting(filterContext);
return;
}
long inputNumber;
if (!long.TryParse(inputText, out inputNumber))
{
logger.LogWarning("inputText is not a number.");
controllerBase.ModelState.AddModelError(CaptchaTagHelper.CaptchaInputName, IsNumericErrorMessage);
base.OnActionExecuting(filterContext);
return;
}
var captchaEncryption = filterContext.HttpContext.RequestServices.GetService <ICaptchaProtectionProvider>();
var decryptedText = captchaEncryption.Decrypt(captchaText);
var humanReadableIntegerProvider = filterContext.HttpContext.RequestServices.GetService <IHumanReadableIntegerProvider>();
var numberToText = humanReadableIntegerProvider.NumberToText(inputNumber, CaptchaGeneratorLanguage);
if (decryptedText == null || !decryptedText.Equals(numberToText))
{
logger.LogWarning($"{decryptedText} != {numberToText}");
controllerBase.ModelState.AddModelError(CaptchaTagHelper.CaptchaInputName, ErrorMessage);
base.OnActionExecuting(filterContext);
return;
}
if (!isValidCookie(filterContext.HttpContext, decryptedText, logger))
{
controllerBase.ModelState.AddModelError(CaptchaTagHelper.CaptchaInputName, ErrorMessage);
base.OnActionExecuting(filterContext);
return;
}
base.OnActionExecuting(filterContext);
}
