private string dataDecoding(StegModel stegModel)
{
// Log unsteg data
_log.Debug("---------------------------------------------------------------------------------");
_log.Debug("Unstegged data:");
_log.Debug($"Content Size: {stegModel.ContentSize}");
_log.Debug($"Steg Content: {stegModel.Content.ToDigitString()}");
_log.Debug($"Full Size: {stegModel.TotalSize}");
_log.Debug($"Full Content: {stegModel.ContentFull.ToDigitString()}");
_log.Debug("---------------------------------------------------------------------------------");
string msg;
if (stegModel.IsFile)
{
var filename = string.IsNullOrEmpty(txtDecFileName.Text.Trim()) ? "file" : txtDecFileName.Text;
var docPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var fileNameAndPath = $@"{docPath}\StegImageUI\Docs\steg_{DateTime.Now.ToString("yyyyMMddHHmmss")}_{filename}";
try
{
msg = CompressionHelper.Unzip(stegModel.Content, true, fileNameAndPath);
}
catch (Exception ex)
{
_log.Debug(ex.Message);
MessageBox.Show(ex.Message, "StegImageUI", MessageBoxButton.OK, MessageBoxImage.Error);
msg = null;
}
}
else
{
try
{
msg = CompressionHelper.Unzip(stegModel.Content);
}
catch (Exception ex)
{
_log.Debug(ex.Message);
MessageBox.Show(ex.Message, "StegImageUI", MessageBoxButton.OK, MessageBoxImage.Error);
msg = null;
}
}
return(msg);
}
private static StegModel unstegImageByImageType(string path)
{
var sm = new StegModel();
var trimPath = path.ToLower().Trim();
// Check image type
if (trimPath.EndsWith(".jpg") || trimPath.EndsWith(".jpeg")) // JPEG
{
var stegStruct = JpegHelper.UnstegBinary(path);
sm.SecurityLevel = stegStruct.SecurityLevel;
sm.TotalSize = stegStruct.TotalSize;
sm.ContentFull = stegStruct.ContentFull;
sm.IsFile = stegStruct.IsFile;
sm.ContentSize = stegStruct.ContentSize;
sm.Content = stegStruct.Content;
}
else if (trimPath.EndsWith(".bmp")) // BITMAP
{
var stegStruct = BmpHelper.UnstegBinary(path);
sm.SecurityLevel = stegStruct.SecurityLevel;
sm.TotalSize = stegStruct.TotalSize;
sm.ContentFull = stegStruct.ContentFull;
sm.IsFile = stegStruct.IsFile;
sm.ContentSize = stegStruct.ContentSize;
sm.Content = stegStruct.Content;
}
else if (trimPath.EndsWith(".png")) // PNG
{
var stegStruct = PngHelper.UnstegBinary(path);
sm.SecurityLevel = stegStruct.SecurityLevel;
sm.TotalSize = stegStruct.TotalSize;
sm.ContentFull = stegStruct.ContentFull;
sm.IsFile = stegStruct.IsFile;
sm.ContentSize = stegStruct.ContentSize;
sm.Content = stegStruct.Content;
}
else if (trimPath.EndsWith(".gif")) // GIF
{
var stegStruct = GifHelper.UnstegBinary(path);
sm.SecurityLevel = stegStruct.SecurityLevel;
sm.TotalSize = stegStruct.TotalSize;
sm.ContentFull = stegStruct.ContentFull;
sm.IsFile = stegStruct.IsFile;
sm.ContentSize = stegStruct.ContentSize;
sm.Content = stegStruct.Content;
}
else if (trimPath.EndsWith(".tif") || trimPath.EndsWith(".tiff")) // TIFF
{
var stegStruct = TifHelper.UnstegBinary(path);
sm.SecurityLevel = stegStruct.SecurityLevel;
sm.TotalSize = stegStruct.TotalSize;
sm.ContentFull = stegStruct.ContentFull;
sm.IsFile = stegStruct.IsFile;
sm.ContentSize = stegStruct.ContentSize;
sm.Content = stegStruct.Content;
}
else if (!string.IsNullOrEmpty(trimPath))
{
MessageBox.Show("Wrong extension.", "StegImageUI", MessageBoxButton.OK, MessageBoxImage.Information);
}
return(sm);
}
