/// <summary>
/// Creates a license validator with specified public key.
/// </summary>
/// <param name="publicKey">public key</param>
protected AbstractLicenseValidator(string publicKey)
{
LeaseTimeout = TimeSpan.FromMinutes(5);
discoveryHost = new DiscoveryHost();
LicenseAttributes = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
this.publicKey = publicKey;
discoveryHost.ClientDiscovered += DiscoveryHostOnClientDiscovered;
sntpClient = new SntpClient(TimeServers);
}
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
{
return;
}
var sntp = new SntpClient(TimeServers);
sntp.BeginGetDate(time =>
{
if (time > ExpirationDate)
{
RaiseLicenseInvalidated();
}
}
, () =>
{
/* ignored */
});
}
private static void Main()
{
//Repro();
var sntpClient = new SntpClient(new[]
{
"time.nist.gov",
"time-nw.nist.gov",
"time-a.nist.gov",
"time-b.nist.gov",
"time-a.timefreq.bldrdoc.gov",
"time-b.timefreq.bldrdoc.gov",
"time-c.timefreq.bldrdoc.gov",
"utcnist.colorado.edu",
"nist1.datum.com",
"nist1.dc.certifiedtime.com",
"nist1.nyc.certifiedtime.com",
});
Console.WriteLine(sntpClient.GetDateAsync().Result);
Console.ReadLine();
}
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
{
return;
}
var sntp = new SntpClient(TimeServers);
sntp.GetDateAsync()
.ContinueWith(task =>
{
if (task.IsFaulted)
{
Logger.WarnException("Failed to get network time, can't tell if the OS time is accurate", task.Exception);
return;
}
if (task.Result > ExpirationDate)
{
RaiseLicenseInvalidated(); // will explicitly crash the system if event is not subscribed
}
});
}
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
{
return;
}
if (LicenseType == LicenseType.Business ||
LicenseType == LicenseType.Architect ||
LicenseType == LicenseType.Education ||
LicenseType == LicenseType.Enterprise ||
LicenseType == LicenseType.Trial
)
{
// Many organizations have blocked NTP traffic, so this
// check creates additional noise that is cause for
// concern on enterprise security teams.
// Since the traffic is already blocked,
// this check would not produce a desired result
// anyway.
return;
}
var sntp = new SntpClient(GetTimeServers());
sntp.BeginGetDate(time =>
{
if (time > ExpirationDate)
{
RaiseLicenseInvalidated();
}
},
() =>
{
/* ignored */
});
}
/// <summary>
/// Creates a license validator with specified public key.
/// </summary>
/// <param name="publicKey">public key</param>
protected AbstractLicenseValidator(string publicKey)
{
LeaseTimeout = TimeSpan.FromMinutes(5);
discoveryHost = new DiscoveryHost();
LicenseAttributes = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
this.publicKey = publicKey;
discoveryHost.ClientDiscovered += DiscoveryHostOnClientDiscovered;
sntpClient = new SntpClient(TimeServers);
}
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
return;
var sntp = new SntpClient(TimeServers);
sntp.GetDateAsync()
.ContinueWith(task =>
{
if (task.IsFaulted)
{
Logger.WarnException("Failed to get network time, can't tell if the OS time is accurate", task.Exception);
return;
}
if (task.Result > ExpirationDate)
RaiseLicenseInvalidated(); // will explicitly crash the system if event is not subscribed
});
}
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
return;
var sntp = new SntpClient(TimeServers);
sntp.BeginGetDate(time =>
{
if (time > ExpirationDate)
RaiseLicenseInvalidated();
}
, () =>
{
/* ignored */
});
}