public ActionResult DecryptedOnly(HttpPostedFileBase upload)
{
string extractedText;
string fileName = GetUniqueFileName(upload.FileName);
Image image = Image.FromStream(upload.InputStream);
image.Save(Server.MapPath("~/Files/" + fileName));
string imagePath = Server.MapPath("~/Files/" + fileName);
Bitmap bmp = new Bitmap(imagePath);
var baseLocation = Server.MapPath("~/Text/");
var fileNameRes = GetUniqueFileName("res.txt");
var fileLocationRes = Path.Combine(baseLocation, fileNameRes);
try
{
extractedText = SteganoHelper.extractText(bmp);
System.IO.File.AppendAllText(fileLocationRes, extractedText, Encoding.Unicode);
TempData["FileLocationOnly"] = fileLocationRes;
return(RedirectToAction("PreviewDecryptOnly"));
}
catch
{
extractedText = "Wrong password";
System.IO.File.AppendAllText(fileLocationRes, extractedText, Encoding.Unicode);
TempData["FileLocationOnly"] = fileLocationRes;
return(RedirectToAction("PreviewDecryptOnly"));
}
}
public ActionResult Decrypted(HttpPostedFileBase upload, string key, string algoritm)
{
string fileName = GetUniqueFileName(upload.FileName);
Image image = Image.FromStream(upload.InputStream);
image.Save(Server.MapPath("~/Files/" + fileName));
string imagePath = Server.MapPath("~/Files/" + fileName);
Bitmap bmp = new Bitmap(imagePath);
string extractedText = SteganoHelper.extractText(bmp);
var baseLocation = Server.MapPath("~/Text/");
var fileNameRes = GetUniqueFileName("res.txt");
var fileLocationRes = Path.Combine(baseLocation, fileNameRes);
try
{
if (algoritm == "AES")
{
extractedText = Crypto.DecryptStringAES(extractedText, key) + Environment.NewLine;
}
else if (algoritm == "TripleDES")
{
extractedText = TripleDes.Decrypt <TripleDESCryptoServiceProvider>(extractedText, key) + Environment.NewLine;
}
else if (algoritm == "Rijndael")
{
extractedText = TripleDes.Decrypt <RijndaelManaged>(extractedText, key) + Environment.NewLine;
}
System.IO.File.AppendAllText(fileLocationRes, extractedText, Encoding.Default);
TempData["FileLocation"] = fileLocationRes;
return(RedirectToAction("PreviewDecrypt"));
}
catch
{
extractedText = "Wrong password";
System.IO.File.AppendAllText(fileLocationRes, extractedText, Encoding.Default);
TempData["FileLocation"] = fileLocationRes;
return(RedirectToAction("PreviewDecrypt"));
}
}
