private void Decryption_bt_Click(object sender, EventArgs e)
{
try
{
Bitmap img = (Bitmap)ulr_image.BackgroundImage;
string Steg_pw = "123";
string extractString = SteganographyHelper.ExtractText(img);
if (string.IsNullOrEmpty(Steg_pw))
{
MessageBox.Show("Please specify the password, To Extract the information.", "Security");
return;
}
extractString = RijndaelAlgo.Decrypt(extractString, Steg_pw);
string inputFile = filepath.Text;
string outpath = Path.GetDirectoryName(filepath.Text) + Guid.NewGuid().ToString() + Path.GetExtension(filepath.Text);
string outputFile = outpath;
string password = extractString; // Your Key Here
UnicodeEncoding UE = new UnicodeEncoding();
byte[] key = UE.GetBytes(password);
FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);
RijndaelManaged RMCrypto = new RijndaelManaged();
CryptoStream cs = new CryptoStream(fsCrypt,
RMCrypto.CreateDecryptor(key, key),
CryptoStreamMode.Read);
FileStream fsOut = new FileStream(outputFile, FileMode.Create);
int data;
while ((data = cs.ReadByte()) != -1)
{
fsOut.WriteByte((byte)data);
}
fsOut.Close();
cs.Close();
fsCrypt.Close();
File.Delete(filepath.Text);
File.Move(outpath, filepath.Text);
MessageBox.Show("File Decrypted successfully", "Information");
}
catch (Exception ex)
{
MessageBox.Show("Decryption failed! " + ex.Message, "Error");
return;
}
}
private void Encryption_bt_Click(object sender, EventArgs e)
{
string embtext = pw_tx.Text;
// string password = @"myKey123"; // Your Key Here
string password = pw_tx.Text; // Your Key Here
UnicodeEncoding UE = new UnicodeEncoding();
byte[] key = UE.GetBytes(password);
string outpath = Path.GetDirectoryName(filepath.Text) + Guid.NewGuid().ToString() + Path.GetExtension(filepath.Text);
// outputpath.Text = Path.GetExtension(fdlg.FileName);
// outputpath.Text = Path.GetDirectoryName(fdlg.FileName);
string cryptFile = outpath;
FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);
RijndaelManaged RMCrypto = new RijndaelManaged();
CryptoStream cs = new CryptoStream(fsCrypt,
RMCrypto.CreateEncryptor(key, key),
CryptoStreamMode.Write);
FileStream fsIn = new FileStream(filepath.Text, FileMode.Open);
int data;
while ((data = fsIn.ReadByte()) != -1)
{
cs.WriteByte((byte)data);
}
fsIn.Close();
cs.Close();
fsCrypt.Close();
File.Delete(filepath.Text);
File.Move(outpath, filepath.Text);
Bitmap img = (Bitmap)pictureBox1.BackgroundImage;
string Steg_pw = "123";
if (string.IsNullOrEmpty(embtext))
{
MessageBox.Show("Empty string can't be hidden", "Warning");
return;
}
if (string.IsNullOrEmpty(Steg_pw))
{
MessageBox.Show("Password can't be empty", "Warning");
return;
}
try
{
embtext = RijndaelAlgo.Encrypt(embtext, Steg_pw);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
try
{
img = SteganographyHelper.MergeText(embtext, img);
string filename = DateTime.Now.ToString("dd-MM-yyyy_HH-mm-ss") + ".png";
string img_location = "F:\\img\\" + filename;
img.Save(img_location, ImageFormat.Png);
string code = "http://localhost" + "/" + filename;
QRCodeEncoder enc = new QRCodeEncoder();
Bitmap bitMap = enc.Encode(code);
pictureBox2.BackgroundImage = bitMap as Image;
SaveFileDialog sav = new SaveFileDialog();
sav.Filter = "Png Image|*.png|Bitmap Image|*.bmp";
if (sav.ShowDialog() == DialogResult.OK)
{
switch (sav.FilterIndex)
{
case 0:
{
bitMap.Save(sav.FileName, ImageFormat.Png);
}
break;
case 1:
{
bitMap.Save(sav.FileName, ImageFormat.Bmp);
}
break;
}
}
MessageBox.Show("File Encrypted successfully", "Information");
}
catch (Exception ex)
{
MessageBox.Show("Encryption failed! " + ex.Message, "Error");
}
}