private static void stegImageByImageType(string path, BitArray baBits, int securityLevel)
{
var trimPath = path.ToLower().Trim();
// Check image type
if (trimPath.EndsWith(".jpg") || trimPath.EndsWith(".jpeg")) // JPEG
{
JpegHelper.StegBinary(path, baBits, securityLevel);
}
else if (trimPath.EndsWith(".bmp")) // BITMAP
{
BmpHelper.StegBinary(path, baBits, securityLevel);
}
else if (trimPath.EndsWith(".png")) // PNG
{
PngHelper.StegBinary(path, baBits, securityLevel);
}
else if (trimPath.EndsWith(".gif")) // GIF
{
GifHelper.StegBinary(path, baBits);
}
else if (trimPath.EndsWith(".tif") || trimPath.EndsWith(".tiff")) // TIFF
{
TifHelper.StegBinary(path, baBits, securityLevel);
}
else if (!string.IsNullOrEmpty(trimPath))
{
MessageBox.Show("Wrong extension.", "StegImageUI", MessageBoxButton.OK, MessageBoxImage.Information);
}
}
private void getSlotsByImageType(string imagePath)
{
var trimPath = imagePath.ToLower().Trim();
// Check image type
if (trimPath.EndsWith(".jpg") || trimPath.EndsWith(".jpeg")) // JPEG
{
// Available slots not 0 - DCT values 0 won't be overwritten
var dctCoeffs = JpegHelper.GetDctCoefficients(imagePath);
// 2 bits for each dct coefficient (0 values are skpped)
_slots = 2 * dctCoeffs.DctFullAc.Where(s => 0 != s).Count() - HEADER_BITS_LEN;
}
else if (trimPath.EndsWith(".bmp")) // BITMAP
{
_slots = BmpHelper.GetAvailableSlots(imagePath) - HEADER_BITS_LEN;
}
else if (trimPath.EndsWith(".png")) // PNG
{
_slots = PngHelper.GetAvailableSlots(imagePath) - HEADER_BITS_LEN;
}
else if (trimPath.EndsWith(".gif")) // GIF
{
sldSecLevel.Value = 1;
_slots = GifHelper.GetAvailableSlots(imagePath) - HEADER_BITS_IDX_LEN;
}
else if (trimPath.EndsWith(".tif") || trimPath.EndsWith(".tiff")) // TIFF
{
sldSecLevel.Value = 1;
_slots = TifHelper.GetAvailableSlots(imagePath) - HEADER_BITS_IDX_LEN;
}
if (_slots < 10)
{
tbxSlots.Text = tbxSlotsUsed.Text = tbxSlotsLeft.Text = "0";
MessageBox.Show("Image not suitable for embedding content.", "StegImageUI", MessageBoxButton.OK, MessageBoxImage.Information);
}
}
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);
}
