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[GH-ISSUE #41] Require solid date checking #35

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opened 2026-02-26 01:35:49 +03:00 by kerem · 1 comment
kerem commented 2026-02-26 01:35:49 +03:00
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Originally created by @xmenxwk on GitHub (Oct 10, 2024).
Original GitHub issue: https://github.com/junian/Standard.Licensing/issues/41

License can easily be manipulated by changing the system date.

Originally created by @xmenxwk on GitHub (Oct 10, 2024). Original GitHub issue: https://github.com/junian/Standard.Licensing/issues/41 License can easily be manipulated by changing the system date.
kerem closed this issue 2026-02-26 01:35:49 +03:00
kerem commented 2026-02-26 01:35:50 +03:00
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@junian commented on GitHub (Oct 10, 2024):

It's outside the scope of this library. You can get time from an NTP server and compare it in validation.

var networkTime = GetNTPTime();

var validationFailures = license.Validate()  
                                .ExpirationDate(systemDateTime: networkTime)  
                                .When(lic => lic.Type == LicenseType.Trial)  
                                .And()  
                                .Signature(publicKey)  
                                .AssertValidLicense();

Or if you have a better idea, feel free to send a PR. Thanks!

<!-- gh-comment-id:2406124008 --> @junian commented on GitHub (Oct 10, 2024): It's outside the scope of this library. You can get time from an NTP server and compare it in validation. ```csharp var networkTime = GetNTPTime(); var validationFailures = license.Validate() .ExpirationDate(systemDateTime: networkTime) .When(lic => lic.Type == LicenseType.Trial) .And() .Signature(publicKey) .AssertValidLicense(); ``` Or if you have a better idea, feel free to send a PR. Thanks!
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