//HIDE
private void hide_Click(object sender, EventArgs e)
{
//SELECT IMAGE TO HIDE TEXT
MessageBox.Show("Select image to hide text");
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp; *.png)|*.jpg; *.jpeg; *.gif; *.bmp; *.png";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
pictureBox1.Image = new Bitmap(openFileDialog.FileName);
textBox1.Text += "To hide the text:" + openFileDialog.FileName + Environment.NewLine;
}
//SELECT THE TEXT FILE TO HIDE IN IMAGE
MessageBox.Show("Select text file to hide");
openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
textBox1.Text += "Text file to be embedded in the image:" + openFileDialog.FileName + Environment.NewLine;
string[] tmp = openFileDialog.FileName.Split('\\');
textFileName = tmp[tmp.Length - 1];
if (!string.IsNullOrEmpty(vigenerekey.Text) && checkKey(vigenerekey) == true)
{
Vigenere.encrypt(openFileDialog.FileName, vigenerekey.Text);
textfile = File.ReadAllBytes(@"C:\ProgramData\stegpro_encrypted.txt");
File.Delete(@"C:\ProgramData\stegpro_encrypted.txt");
}
else
{
textfile = File.ReadAllBytes(openFileDialog.FileName);
}
}
//GET IMAGE SIZE AND PIXELS
Bitmap bmp = new Bitmap(pictureBox1.Image);
int x = bmp.Width;
int y = bmp.Height;
byte[] r = new byte[x * y];
byte[] g = new byte[x * y];
byte[] b = new byte[x * y];
k = 0;
for (i = 0; i < y; i++)
{
for (j = 0; j < x; j++)
{
r[k] = bmp.GetPixel(j, i).R;
g[k] = bmp.GetPixel(j, i).G;
b[k] = bmp.GetPixel(j, i).B;
k++;
}
}
//CHANGE BITS BETWEEN TEXT FILE BITS AND IMAGE PIXELS LSB BITS
BitArray textBits = new BitArray(textfile);
i = 0; j = 0;
changeBits(r, textBits);
changeBits(g, textBits);
changeBits(b, textBits);
Bitmap newImage = (Bitmap)bmp.Clone();
x = bmp.Width;
y = bmp.Height;
k = 0;
Color rgb;
for (i = 0; i < y; i++)
{
for (j = 0; j < x; j++)
{
rgb = Color.FromArgb((int)r[k], (int)g[k], (int)b[k]);
newImage.SetPixel(j, i, rgb);
k++;
}
}
textBox1.Text += "The text file is embedded in the image." + Environment.NewLine;
//SAVE IMAGE TO CUSTOM FOLDER
pictureBox2.Image = newImage;
var savePath = new FolderBrowserDialog();
MessageBox.Show("Select folder to save the new image");
if (savePath.ShowDialog() == DialogResult.OK)
{
string folderName = savePath.SelectedPath;
pictureBox2.Image.Save(folderName + "\\newImage.png", ImageFormat.Png);
}
textBox1.Text += "The new image is saved to " + savePath.SelectedPath + "\\newImage.png" + Environment.NewLine;
}
//EXTRACT
private void extract_Click(object sender, EventArgs e)
{
//SELECT IMAGE TO EXTRACT THE TEXT
MessageBox.Show("Select image to extract the text");
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp; *.png)|*.jpg; *.jpeg; *.gif; *.bmp; *.png";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
pictureBox2.Image = new Bitmap(openFileDialog.FileName);
results(textBox1);
textBox1.Text += "The text will be extract from this image:" + openFileDialog.FileName + Environment.NewLine;
}
//GET IMAGE PIXELS
Bitmap bmp = new Bitmap(pictureBox2.Image);
int x = bmp.Width;
int y = bmp.Height;
byte[] r = new byte[x * y];
byte[] g = new byte[x * y];
byte[] b = new byte[x * y];
k = 0;
for (i = 0; i < y; i++)
{
for (j = 0; j < x; j++)
{
r[k] = bmp.GetPixel(j, i).R;
g[k] = bmp.GetPixel(j, i).G;
b[k] = bmp.GetPixel(j, i).B;
k++;
}
}
//EXTRACT ALL BITS
BitArray extractBits = new BitArray(8);
k = 0;
l = 0;
int length = (r.Length + g.Length + b.Length) / 8;
tmpBytes = new byte[length];
extractAllBits(r, extractBits);
extractAllBits(g, extractBits);
extractAllBits(b, extractBits);
//BIT ARRAY TO BYTE ARRAY
byte[] extractBytes = new byte[l];
for (int i = 0; i < extractBytes.Length; i++)
{
extractBytes[i] = tmpBytes[i];
}
//VIGENERE DECRYPTION
if (!string.IsNullOrEmpty(vigenerekey.Text) && checkKey(vigenerekey) == true)
{
Vigenere.decrypt(extractBytes, vigenerekey.Text);
}
//SAVE TEXT FILE TO CUSTOM FOLDER
var savePath = new FolderBrowserDialog();
MessageBox.Show("Select folder to save the extracted text file");
if (savePath.ShowDialog() == DialogResult.OK)
{
string folderName = savePath.SelectedPath;
File.WriteAllBytes(folderName + "\\extracted_text.txt", extractBytes);
}
textBox1.Text += "The extracted file saved to " + savePath.SelectedPath + "\\extracted_text.txt" + Environment.NewLine;
}