private void button1_Click(object sender, EventArgs e)
{
MACHandler mh = new MACHandler(comboBoxMAC.Text);
byte[] mac =
mh.ComputeMAC(myConverter.StringToByteArray(textBoxPlain.
Text), myConverter.StringToByteArray(textBoxKey.Text));
textBoxMAC.Text = myConverter.ByteArrayToString(mac);
textBoxMACHEX.Text = myConverter.ByteArrayToHexString(mac);
}
private void button2_Click(object sender, EventArgs e)
{
MACHandler mh = new MACHandler(comboBoxMAC.Text);
if (mh.CheckAuthenticity(myConverter.StringToByteArray(textBoxPlain.Text),
myConverter.HexStringToByteArray(textBoxMACHEX.Text),
myConverter.StringToByteArray(textBoxKey.Text)) == true)
{
System.Windows.Forms.MessageBox.Show("MAC OK !!!");
}
else
{
System.Windows.Forms.MessageBox.Show("MAC NOT OK !!!");
}
}
private void button3_Click(object sender, EventArgs e)
{
MACHandler smth = new MACHandler(comboBoxMAC.Text);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, smth.myMAC, CryptoStreamMode.Write);
byte[] mes_block = new byte[8];
long start_time = DateTime.Now.Ticks;
int count = 10000000;
for (int i = 0; i < count; i++)
{
cs.Write(mes_block, 0, mes_block.Length);
}
cs.Close();
double operation_time = (DateTime.Now.Ticks - start_time);
operation_time = operation_time / (10 * count);
labelEncTime.Text = "Time for encryption of a message block: " + operation_time.ToString() + " us";
}