public ZLicense(string licenseKey = "")
{
try
{
if (string.IsNullOrEmpty(licenseKey))
{
licenseKey = GetLicenseKey();
}
LicenseKey = licenseKey;
var license = Lic.Verifier
.WithRsaPublicKey(PublicKey) // .WithSigner(ISigner)
.WithApplicationCode(APP_CODE) // .WithoutApplicationCode
.LoadAndVerify(LicenseKey);
IssueDate = license.IssueDate;
ExpirationDate = license.ExpirationDate;
HardwareIdentifier = license.HardwareIdentifier;
SerialNumber = license.SerialNumber;
ZId = license.Properties["ZId"];
Username = license.Properties["Username"];
SupportedApps = license.Properties["SupportedApps"];
SupportedDevices = license.Properties["SupportedDevices"];
}
catch
{
IssueDate = DateTime.Now;
ExpirationDate = DateTime.Now;
SerialNumber = SerialNo.Create(APP_CODE);
HardwareIdentifier = HWId.ForCurrentComputer();
ZId = HardwareInfo.GenerateUID();
SupportedApps = "";
SupportedDevices = "";
}
}
internal string VerifyLicense(string licenseText)
{
var errorMessage = string.Empty;
try
{
SignedLicense license = Lic.Verifier
.WithRsaPublicKey(PublicKey) // .WithSigner(ISigner)
.WithApplicationCode(APP_CODE) // .WithoutApplicationCode
.LoadAndVerify(licenseText);
if (DateTime.Compare(license.ExpirationDate, DateTime.Now) < 0)
{
errorMessage = "License expired";
}
else
{
if ((license.HardwareIdentifier != HardwareIdentifier) ||
(license.Properties["ZId"] != ZId) ||
(license.Properties["ExpirationDate"] != license.ExpirationDate.ToString(DATE_FROMAT)))
{
errorMessage = "Invalid license";
}
if (!HWId.IsCheckSumValid(license.HardwareIdentifier))
{
errorMessage = "Invalid license";
}
}
SupportedApps = license.Properties["SupportedApps"];
SupportedDevices = license.Properties["SupportedDevices"];
}
catch (Exception ex)
{
if (ex.Message.StartsWith("License has been expired"))
{
errorMessage = ex.Message;
}
else
{
errorMessage = "Invalid license";
}
}
return(errorMessage);
}
SignedLicense IVerifier_VerifyLoad.LoadAndVerify(string licenseString)
{
var license = SignedLicense.Deserialize(licenseString);
// verify signature
license.Verify(mySigner);
// verify application code
if (!SerialNumber.IsApplicationCodeValid(license.SerialNumber, myApplicationCode))
{
throw new SignedLicenseException($"Application Code '{myApplicationCode}' is not valid for the license.");
}
// verify hardware identifier
if (!HardwareIdentifier.IsValidForCurrentComputer(license.HardwareIdentifier))
{
throw new SignedLicenseException($"License has been activated for another computer.");
}
// verify expiration date
if (license.ExpirationDate < DateTime.UtcNow)
{
throw new SignedLicenseException($"License has been expired since '{license.ExpirationDate}'.");
}
return(license);
}
