private void button1_Click(object sender, EventArgs e)
{
if ((textBox2.Text.Length < 1) || (textBox2.Text.Length > 129))
{
System.Windows.Forms.MessageBox.Show("Text must consist of 1 to 129 characters");
}
else if (textBox1.Text.Length < 1)
{
System.Windows.Forms.MessageBox.Show("Password cannot be empty string");
}
else
{
string password = textBox1.Text;
string text = textBox2.Text;
BigInteger plaintext = new BigInteger(Encoding.ASCII.GetBytes(text));
Cursor.Current = Cursors.WaitCursor;
maintext = BigIntegerExtensions.Encrypt(plaintext, password, 128);
string encryptedText = new string(Encoding.ASCII.GetChars(maintext.ToByteArray()));
if (encryptedText.Length > 129)
{
System.Windows.Forms.MessageBox.Show("Failed to encrypt message with that password. Try changing your password or message.");
maintext = new BigInteger(Encoding.ASCII.GetBytes(textBox2.Text));
}
else
{
textBox2.Text = encryptedText;
}
Cursor.Current = Cursors.Default;
}
}
private void button2_Click(object sender, EventArgs e)
{
if ((textBox2.Text.Length < 1) || (textBox2.Text.Length > 129))
{
System.Windows.Forms.MessageBox.Show("Text must consist of 1 to 128 characters");
}
else if (textBox1.Text.Length < 1)
{
System.Windows.Forms.MessageBox.Show("Password cannot be empty string");
}
else
{
string password = textBox1.Text;
Cursor.Current = Cursors.WaitCursor;
maintext = BigIntegerExtensions.Decrypt(maintext, password, 128);
textBox2.Text = new string(Encoding.ASCII.GetChars(maintext.ToByteArray()));
Cursor.Current = Cursors.Default;
}
}
