//enkripsi
private void button2_Click(object sender, EventArgs e)
{
//menyimpan hasil paling akhir
String result;
//menyimpan hasil tiap mode
byte[] modeResult = null;
String mode = "";
//check input file
if (openFileDialog1.FileName.Equals("openFileDialog1"))
{
MessageBox.Show("Anda belum memasukan input file", "Peringatan", MessageBoxButtons.OK);
return;
}
//validate key and IV
Regex reg = new Regex("^[a-zA-Z0-9]*$");
//key.length >= 8-byte
if (keyBox.Text.Length < 8)
{
MessageBox.Show("Panjang kunci kurang dari 64-bit", "Peringatan", MessageBoxButtons.OK);
return;
}
else if(!reg.IsMatch(keyBox.Text))
{
MessageBox.Show("Kunci hanya boleh mengandung karakter alfanumerik", "Peringatan", MessageBoxButtons.OK);
return;
}
else
{
//IV.length = key.length
if ((!radioButton2.Checked && !radioButton1.Checked) && (ivBox.Text.Length != keyBox.Text.Length))
{
MessageBox.Show("Panjang IV tidak sama dengan panjang kunci", "Peringatan", MessageBoxButtons.OK);
return;
}
else if ((!radioButton2.Checked && !radioButton1.Checked) && (ivBox.Text.Contains(".")))
{
MessageBox.Show("IV tidak boleh mengandung karakter \".\"", "Peringatan", MessageBoxButtons.OK);
return;
}
}
//read file content (plaintext)
String dialogfilename = openFileDialog1.FileName;
byte[] plain = System.IO.File.ReadAllBytes(dialogfilename);
//check used mode
if (radioButton1.Checked)
{
//ECB mode
mode = "ECB";
ECB ecb = new ECB (plain, null, keyBox.Text, ivBox.Text);
modeResult = ecb.encrypt();
}
else if (radioButton2.Checked)
{
//generate IV
//IV==key
//CBC mode
mode = "CBC";
CBC cbc = new CBC(Encoding.ASCII.GetString(plain), "", keyBox.Text, keyBox.Text);
ivBox.Text = keyBox.Text;
modeResult = cbc.encipher(plain);
}
else if (radioButton3.Checked)
{
//CFB mode
mode = "CFB";
CFB cfb = new CFB(plain, null ,keyBox.Text,ivBox.Text);
modeResult = cfb.encrypt();
}
else if (radioButton4.Checked)
{
//OFB mode
mode = "OFB";
OFB ofb = new OFB(plain, null, keyBox.Text, ivBox.Text);
modeResult = ofb.encrypt();
}
//convert byte to hex
result = ByteArrayToString(modeResult);
//set header
result += "." + ivBox.Text + "." + Path.GetFileNameWithoutExtension(filepath) + Path.GetExtension(filepath) + "." + mode + "." + (keyBox.Text.Length- (plain.Length % keyBox.Text.Length)).ToString();
textBox3.Text = result;
}
public void StringTest2()
{
//
// TODO: Add test logic here
//
byte[] plain = Encoding.ASCII.GetBytes("kripto.grafi");
CFB cfb = new CFB(plain, null, "1234567890123", "0987654321098");
cfb.encrypt();
CollectionAssert.AreEqual(plain, cfb.decrypt());
}