public static BitmapSource InsertionWithAlgorithmStandard(string imagePath, string messagePath, string key)
{
// Read pixel
BitmapImage bitmapImage = new BitmapImage(new Uri(imagePath));
int height = bitmapImage.PixelHeight;
int width = bitmapImage.PixelWidth;
int nStride = (bitmapImage.PixelWidth * bitmapImage.Format.BitsPerPixel + 7) / 8;
byte[] pixels = new byte[bitmapImage.PixelHeight * nStride];
bitmapImage.CopyPixels(pixels, nStride, 0);
Console.WriteLine("Capacity = " + pixels.Length);
// Create extended message
string fileName = Path.GetFileName(messagePath);
byte[] fileNameLengthBytes = BitConverter.GetBytes((Int32)fileName.Length);
byte[] fileNameBytes = new byte[fileName.Length * 2];
for (int i = 0; i < fileName.Length; i++)
{
byte[] bt = BitConverter.GetBytes(fileName[i]);
fileNameBytes[i * 2] = bt[0];
fileNameBytes[i * 2 + 1] = bt[1];
}
byte[] messageBytesBeforeEncrypt = File.ReadAllBytes(messagePath);
byte[] messageBytes = Viginere.Encrypt(messageBytesBeforeEncrypt, key);
byte[] messageLengthBytes = BitConverter.GetBytes((Int32)messageBytes.Length);
byte[] messageExtended = new byte[4 + fileName.Length * 2 + 4 + messageBytes.Length];
int idx = 0;
for (int i = 0; i < fileNameLengthBytes.Length; i++)
{
messageExtended[idx] = fileNameLengthBytes[i];
idx++;
}
for (int i = 0; i < fileNameBytes.Length; i++)
{
messageExtended[idx] = fileNameBytes[i];
idx++;
}
for (int i = 0; i < messageLengthBytes.Length; i++)
{
messageExtended[idx] = messageLengthBytes[i];
idx++;
}
for (int i = 0; i < messageBytes.Length; i++)
{
messageExtended[idx] = messageBytes[i];
idx++;
}
// Inserting message
List <int> seq = PRNG.GenerateSequence(key, pixels.Length);
for (int i = 0; i < messageExtended.Length; i++)
{
for (byte j = 0; j < 8; j++)
{
pixels[seq[i * 8 + j]] = pixels[seq[i * 8 + j]].SetBit(0, messageExtended[i].GetBit(j));
}
}
BitmapSource bitmapOutput = BitmapImage.Create(bitmapImage.PixelWidth, bitmapImage.PixelHeight, bitmapImage.DpiX, bitmapImage.DpiY, bitmapImage.Format, bitmapImage.Palette, pixels, nStride);
return(bitmapOutput);
}
public static BitmapSource InsertionWithAlgorithmSwain(string imagePath, string messagePath, string key)
{
// Read pixel
BitmapImage bitmapImage = new BitmapImage(new Uri(imagePath));
int height = bitmapImage.PixelHeight;
int width = bitmapImage.PixelWidth;
int nStride = (bitmapImage.PixelWidth * bitmapImage.Format.BitsPerPixel + 7) / 8;
byte[] pixels = new byte[bitmapImage.PixelHeight * nStride];
bitmapImage.CopyPixels(pixels, nStride, 0);
// Create extended message
string fileName = Path.GetFileName(messagePath);
byte[] fileNameLengthBytes = BitConverter.GetBytes((Int32)fileName.Length);
byte[] fileNameBytes = new byte[fileName.Length * 2];
for (int i = 0; i < fileName.Length; i++)
{
byte[] bt = BitConverter.GetBytes(fileName[i]);
fileNameBytes[i * 2] = bt[0];
fileNameBytes[i * 2 + 1] = bt[1];
}
byte[] messageBytesBeforeEncrypt = File.ReadAllBytes(messagePath);
byte[] messageBytes = Viginere.Encrypt(messageBytesBeforeEncrypt, key);
byte[] messageLengthBytes = BitConverter.GetBytes((Int32)messageBytes.Length);
byte[] messageExtended = new byte[4 + fileName.Length * 2 + 4 + messageBytes.Length];
int idx = 0;
for (int i = 0; i < fileNameLengthBytes.Length; i++)
{
messageExtended[idx] = fileNameLengthBytes[i];
idx++;
}
for (int i = 0; i < fileNameBytes.Length; i++)
{
messageExtended[idx] = fileNameBytes[i];
idx++;
}
for (int i = 0; i < messageLengthBytes.Length; i++)
{
messageExtended[idx] = messageLengthBytes[i];
idx++;
}
for (int i = 0; i < messageBytes.Length; i++)
{
messageExtended[idx] = messageBytes[i];
idx++;
}
// Inserting message
byteCnt = 0;
bitCnt = 0;
cap = 0;
// process per block
for (int i = 0; i < pixels.Length - 8; i += 9)
{
if (messageExtended.Length <= byteCnt)
{
break;
}
// copy pixels to block
byte[] block = new byte[9];
block[0] = pixels[i];
block[1] = pixels[i + 1];
block[2] = pixels[i + 2];
block[3] = pixels[i + 3];
block[4] = pixels[i + 4];
block[5] = pixels[i + 5];
block[6] = pixels[i + 6];
block[7] = pixels[i + 7];
block[8] = pixels[i + 8];
block = processedBlock(block, messageExtended);
// fill the pixels with processed block
pixels[i] = block[0];
pixels[i + 1] = block[1];
pixels[i + 2] = block[2];
pixels[i + 3] = block[3];
pixels[i + 4] = block[4];
pixels[i + 5] = block[5];
pixels[i + 6] = block[6];
pixels[i + 7] = block[7];
pixels[i + 8] = block[8];
}
BitmapSource bitmapOutput = BitmapImage.Create(bitmapImage.PixelWidth, bitmapImage.PixelHeight, bitmapImage.DpiX, bitmapImage.DpiY, bitmapImage.Format, bitmapImage.Palette, pixels, nStride);
return(bitmapOutput);
}
public static BitmapSource InsertionWithAlgorithmLiao(string imagePath, string messagePath, string key, int T, int Kl, int Kh, int cpp)
{
// Create extended message
string fileName = Path.GetFileName(messagePath);
byte[] fileNameLengthBytes = BitConverter.GetBytes((Int32)fileName.Length);
byte[] fileNameBytes = new byte[fileName.Length * 2];
for (int i = 0; i < fileName.Length; i++)
{
byte[] bt = BitConverter.GetBytes(fileName[i]);
fileNameBytes[i * 2] = bt[0];
fileNameBytes[i * 2 + 1] = bt[1];
}
byte[] messageBytesBeforeEncrypt = File.ReadAllBytes(messagePath);
byte[] messageBytes = Viginere.Encrypt(messageBytesBeforeEncrypt, key);
byte[] messageLengthBytes = BitConverter.GetBytes((Int32)messageBytes.Length);
byte[] messageExtended = new byte[4 + fileName.Length * 2 + 4 + messageBytes.Length];
int idx = 0;
for (int i = 0; i < fileNameLengthBytes.Length; i++)
{
messageExtended[idx] = fileNameLengthBytes[i];
idx++;
}
for (int i = 0; i < fileNameBytes.Length; i++)
{
messageExtended[idx] = fileNameBytes[i];
idx++;
}
for (int i = 0; i < messageLengthBytes.Length; i++)
{
messageExtended[idx] = messageLengthBytes[i];
idx++;
}
for (int i = 0; i < messageBytes.Length; i++)
{
messageExtended[idx] = messageBytes[i];
idx++;
}
//Lockbitmap pixel handling
LiaoAlgorithm lal = new LiaoAlgorithm();
Bitmap bmp = (Bitmap)Image.FromFile(imagePath, true);
LockBitmap lockBitmap = new LockBitmap(bmp);
BitArray bitmsg = new BitArray(messageExtended);
lockBitmap.LockBits();
System.Drawing.Color[] pixes = new System.Drawing.Color[4];
byte[] pixelInput = new byte[4];
bool looping = true;
int imgcapacity = 0;
//capacity counting
for (int i = 0; (i < lockBitmap.Width / 2) && looping; i++)
{
for (int j = 0; j < lockBitmap.Height / 2 && looping; j++)
{
pixes[0] = lockBitmap.GetPixel(i * 2, j * 2);
pixes[1] = lockBitmap.GetPixel(i * 2 + 1, j * 2);
pixes[2] = lockBitmap.GetPixel(i * 2, j * 2 + 1);
pixes[3] = lockBitmap.GetPixel(i * 2 + 1, j * 2 + 1);
for (int nrgb = 0; nrgb < cpp && looping; nrgb++)
{
switch (nrgb)
{
case 0:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].R;
}
break;
case 1:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].G;
}
break;
case 2:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].B;
}
break;
default:
break;
}
imgcapacity += lal.Capacity(pixelInput, T, Kl, Kh);
}
}
}
//end of capacity counting
Console.WriteLine("capacity : " + imgcapacity);
for (int i = 0; (i < lockBitmap.Width / 2) && looping; i++)
{
for (int j = 0; j < lockBitmap.Height / 2 && looping; j++)
{
pixes[0] = lockBitmap.GetPixel(i * 2, j * 2);
pixes[1] = lockBitmap.GetPixel(i * 2 + 1, j * 2);
pixes[2] = lockBitmap.GetPixel(i * 2, j * 2 + 1);
pixes[3] = lockBitmap.GetPixel(i * 2 + 1, j * 2 + 1);
for (int nrgb = 0; nrgb < cpp && looping; nrgb++)
{
switch (nrgb)
{
case 0:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].R;
}
break;
case 1:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].G;
}
break;
case 2:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixelInput[pixIn] = pixes[pixIn].B;
}
break;
default:
break;
}
if (lal.liaoEncrypt(pixelInput, T, Kl, Kh, bitmsg) != null) //parameter undefined
{
pixelInput = lal.liaoEncrypt(pixelInput, T, Kl, Kh, bitmsg);
if ((bitmsg.Length - 4 * lal.recentk) <= 0)
{
looping = false;
}
else
{
BitArray temp = new BitArray(bitmsg.Length - 4 * lal.recentk);
for (int k = 0; k < temp.Length; k++)
{
temp[k] = bitmsg[k + 4 * lal.recentk];
}
bitmsg = temp;
}
switch (nrgb)
{
case 0:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
if (cpp == 3)
{
pixes[pixIn] = System.Drawing.Color.FromArgb(pixelInput[pixIn], pixes[pixIn].G, pixes[pixIn].B);
}
else
{
pixes[pixIn] = System.Drawing.Color.FromArgb(pixelInput[pixIn], pixelInput[pixIn], pixelInput[pixIn]);
}
}
break;
case 1:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixes[pixIn] = System.Drawing.Color.FromArgb(pixes[pixIn].R, pixelInput[pixIn], pixes[pixIn].B);
}
break;
case 2:
for (int pixIn = 0; pixIn < 4; pixIn++)
{
pixes[pixIn] = System.Drawing.Color.FromArgb(pixes[pixIn].R, pixes[pixIn].G, pixelInput[pixIn]);
}
break;
default:
break;
}
}
}
lockBitmap.SetPixel(i * 2, j * 2, pixes[0]);
lockBitmap.SetPixel(i * 2 + 1, j * 2, pixes[1]);
lockBitmap.SetPixel(i * 2, j * 2 + 1, pixes[2]);
lockBitmap.SetPixel(i * 2 + 1, j * 2 + 1, pixes[3]);
}
}
lockBitmap.UnlockBits();
BitmapSource bs = LiaoAlgorithm.ConvertBitmap(bmp);
return(bs);
}
