public HttpResponseMessage GetCaptcha(HttpRequestMessage request)
{
var randomText = TextHelper.GenerateRandomText(4);
var rnd = new Random();
var fonts = new[] { "Verdana", "Times New Roman" };
float orientationAngle = rnd.Next(0, 359);
var index0 = rnd.Next(0, fonts.Length);
var familyName = fonts[index0];
using (var bmpOut = new Bitmap(width, height))
{
var g = Graphics.FromImage(bmpOut);
var gradientBrush = new LinearGradientBrush(new Rectangle(0, 0, width, height),
Color.White, Color.DarkGray,
orientationAngle);
g.FillRectangle(gradientBrush, 0, 0, width, height);
DrawRandomLines(ref g, width, height);
g.DrawString(randomText, new Font(familyName, 18), new SolidBrush(Color.LightSlateGray), 0, 2);
var ms = new MemoryStream();
bmpOut.Save(ms, ImageFormat.Png);
var bmpBytes = ms.GetBuffer();
bmpOut.Dispose();
ms.Close();
return(request.CreateResponse(HttpStatusCode.OK, new CaptchaModel {
Hash = Compute.ComputeMd5Hash(randomText + GetSalt()), ImageByteArray = bmpBytes
}));
}
}
public ActionResult Login(string returnUrl)
{
string randomText = string.Empty;
var bmpBytes = GetCatcha(out randomText);
var hash = Compute.ComputeMd5Hash(randomText + GetSalt());
Session["CaptchaHash"] = hash;
var model = new LoginViewModel(bmpBytes, string.Empty, string.Empty, string.Empty);
ViewBag.ReturnUrl = returnUrl;
return(View(model));
}
public ActionResult Login(string userName, string password, string captcha, string returnUrl)
{
var hash = Compute.ComputeMd5Hash(captcha + GetSalt());
var captchaHash = Session["CaptchaHash"] as string;
if (hash.Equals(captchaHash))
{
ApplicationUser user = UserManager.Instance.UserManagerment.Find(userName, password);
if (user != null)
{
if (!user.Status)
{
ViewData["ErrorLogin"] = "******";
}
else
{
IAuthenticationManager authenticationManager = HttpContext.GetOwinContext().Authentication;
authenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);
ClaimsIdentity identity = UserManager.Instance.UserManagerment.CreateIdentity(user, DefaultAuthenticationTypes.ApplicationCookie);
AuthenticationProperties props = new AuthenticationProperties();
authenticationManager.SignIn(props, identity);
return(RedirectToLocal(returnUrl));
}
}
else
{
ViewData["ErrorLogin"] = "******";
}
}
else
{
ViewData["ErrorLogin"] = "******";
}
string randomText = string.Empty;
var bmpBytes = GetCatcha(out randomText);
Session["CaptchaHash"] = Compute.ComputeMd5Hash(randomText + GetSalt());
var model = new LoginViewModel(bmpBytes, userName, password, captcha);
ViewBag.ReturnUrl = returnUrl;
return(View(model));
}
public HttpResponseMessage VatelidateCaptcha(HttpRequestMessage request, string hash, string captchaValue)
{
var tocheck = Compute.ComputeMd5Hash(captchaValue + GetSalt());
return(request.CreateResponse(HttpStatusCode.OK, hash.Equals(tocheck)));
}
