public void HideBytesInPng(Image innocuousBmp, string outputImageFileName, byte[] hiddenBytes)
{
hiddenBytes = ByteEncryptionUtil.EncryptSalsa20(hiddenBytes, _key);
byte[] hiddenLengthBytes = BitConverter.GetBytes(hiddenBytes.Length);
byte[] hiddenCombinedBytes = PngUtils.Combine(hiddenLengthBytes, hiddenBytes);
byte[] rgbComponents = PngUtils.RgbComponentsToBytes(innocuousBmp);
byte[] encodedRgbComponents = EncodeBytes(hiddenCombinedBytes, rgbComponents);
Bitmap encodedBmp = PngUtils.ByteArrayToBitmap(encodedRgbComponents, innocuousBmp.Width, innocuousBmp.Height);
encodedBmp.Save(outputImageFileName, ImageFormat.Png);
encodedBmp.Dispose();
innocuousBmp.Dispose();
}
public void HideBytesInPng(Image innocuousBmp, string outputImageFileName, byte[] hiddenBytes)
{
byte[] hiddenLengthBytes = BitConverter.GetBytes(hiddenBytes.Length);
byte[] hiddenCombinedBytes = PngUtils.Combine(hiddenLengthBytes, hiddenBytes);
byte[] rgbComponents = PngUtils.RgbComponentsToBytes(innocuousBmp);
byte[] encodedRgbComponents = EncodeBytes(hiddenCombinedBytes, rgbComponents);
Bitmap encodedBmp = PngUtils.ByteArrayToBitmap(encodedRgbComponents, innocuousBmp.Width, innocuousBmp.Height);
encodedBmp.Save(outputImageFileName, ImageFormat.Png);
encodedBmp.Dispose();
innocuousBmp.Dispose();
Console.WriteLine("Saved as " + outputImageFileName);
return;
}