http://www.enginpolat.com/asp-net-mvc-ile-resim-icerisine-metin-gomme-steganography/

982

//ASP.NET MVC ile resim içerisine metin gömme (Steganography)

http://www.enginpolat.com/asp-net-mvc-ile-resim-icerisine-metin-gomme-steganography/

HomeController-Index.cs

[HttpPost]
public ActionResult Index(HttpPostedFileBase resim)
{
  var original = new Bitmap(resim.InputStream);

  var encrypted = new Bitmap(original.Width, original.Height);

  var text = "Hello World!";

  for (int iLoop = 0; iLoop < original.Width; iLoop++)
  {
    for (int yLoop = 0; yLoop < original.Height; yLoop++)
    {
      var pixel = original.GetPixel(iLoop, yLoop);

      if (iLoop == 0 && yLoop < text.Length)
      {
        var letter = text[yLoop];

        pixel = Color.FromArgb(pixel.R, pixel.G, letter);
      }

      encrypted.SetPixel(iLoop, yLoop, pixel);
    }
  }

  using (var ms = new MemoryStream())
  {
    encrypted.Save(ms, ImageFormat.Jpeg);

    return File(ms.ToArray(), "image/jpg");
  }
}

Index.cshtml

<form method="post" enctype="multipart/form-data">
  <input type="file" name="resim" />
  <input type="submit" value="Gönder" />
</form>

this is quite a nice code