public static Tuple <bool, string> CheckLicense()
{
string errInfo = "Cannot find the license file.";
DirectoryInfo hdDir = new DirectoryInfo(".");
foreach (FileInfo found in hdDir.GetFiles("*.lic"))
{
string encrypted = File.ReadAllText(found.FullName);
if (encrypted == string.Empty)
{
continue;
}
string plainText = AesTools.Decrypt(encrypted);
string[] info = plainText.Split(' ');
if (!SystemTools.CheckMAC(info[0]))
{
errInfo = "The physical address does not match.";
continue;
}
DateTime dt = Convert.ToDateTime(info[1]);
if (DateTime.Compare(dt, DateTime.Now) < 0)
{
errInfo = "Your license is expired.";
continue;
}
return(Tuple.Create(true, Path.GetFileNameWithoutExtension(found.Name)));
}
return(Tuple.Create(false, errInfo));
}
private void button_Generate_MouseClick(object sender, MouseEventArgs e)
{
string info = textBox_MAC.Text + " " + dateTimePicker_Expired.Text;
string encryptedInfo = AesTools.Encrypt(info);
File.WriteAllText(textBox_username.Text + ".lic", encryptedInfo);
Process.Start(".");
}