An API documentation can be found at

This library contains methods for:

* Time change check (make sure the time has not been changed on the client computer)
* Key Validation (this will use to validate keys against the database)
* Key Activation (this will, depending on the settings, activate a key with a specific machine code)
* Key Activation Trial (allows you to update a key if it is a trial key)
* Get Machine Code (calculates a machine code given any hash function)
* Get Eight Byte Hash (returns an 8 digit long hash number)

* The article of how the activation component can be used is found here:
* For Key Activation Trial:
* For Key Validation:

NB: SKGL Extension supports Java also:

Suggested Alternatives


Additional Details

We have renamed the package to Cryptolens.Licensing. Please install the new package, Cryptolens.Licensing, to access new updates. SKGLExtension is no longer maintained.

There is a newer version of this package available.
See the version list below for details.
Install-Package SKGLExtension -Version
dotnet add package SKGLExtension --version
<PackageReference Include="SKGLExtension" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add SKGLExtension --version
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes Fixed the GetKeyInformationFromParameters method not accepting "newkey" parameter. Added two methods, GetParameters and GetKeyInformationFromParameters that will work with the new version of the Web API. A minor change in the way products are displayed and information about pid, uid and hsum is retreived. the ability to get a list of all products and product variables such as "uid", "pid" and "hsum".

API documentation:

NuGet packages

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GitHub repositories

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Version History

Version Downloads Last updated
4.0.3 1,033 4/20/2018 673 6/21/2017 759 6/27/2016 589 6/22/2016 664 3/16/2016 656 1/19/2016 679 12/5/2015 634 11/1/2015 646 9/3/2015 624 8/9/2015 641 7/24/2015 648 5/13/2015 629 5/3/2015 667 1/30/2015 648 1/15/2015 621 1/7/2015 676 12/9/2014 766 11/19/2014 919 11/17/2014 850 11/4/2014 635 10/23/2014 688 9/30/2014 624 9/27/2014 634 8/11/2014 621 8/8/2014
1.0.3 662 7/27/2014
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