prs/prs.classes/Settings/LicenseKey.cs

namespace Comal.Classes
{

#if LICENCEENABLED
    public class LicenseKey : GlobalConfigurationSettings
    {

        public String Data { get; set; }
        
        public void Encode(String machineid, DateTime renewed, DateTime expiry)
        {
            Dictionary<String, String> data = new Dictionary<string, string>();
            data["machineid"] = machineid;
            data["renewed"] = renewed.ToString("o");
            data["expiry"] = expiry.ToString("o");
            Data = Encryption.Encrypt(Serialization.Serialize(data), "(!Th3@Qu1ck#Br0wn$F0xJump5%0v3r^th3&L4zy*d0g)");
        }

        public bool Decode(out string machineid, out DateTime renewed, out DateTime expiry)
        {
            try
            {
                String json = Encryption.Decrypt(Data, "(!Th3@Qu1ck#Br0wn$F0xJump5%0v3r^th3&L4zy*d0g)");
                var data = Serialization.Deserialize<Dictionary<String, String>>(json);
                machineid = data["machineid"];
                renewed = data.ContainsKey("renewed") ? DateTime.Parse(data["renewed"]) : DateTime.MinValue;
                expiry = DateTime.Parse(data["expiry"]);
                return true;
            }
            catch
            {
                machineid = "";
                renewed = DateTime.MinValue;
                expiry = DateTime.MinValue;
            }
            return false;

        }

    }
#endif
}