Standard.Licensing 1.1.5

There is a newer version of this package available.
See the version list below for details.
dotnet add package Standard.Licensing --version 1.1.5
NuGet\Install-Package Standard.Licensing -Version 1.1.5
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Standard.Licensing" Version="1.1.5" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Standard.Licensing --version 1.1.5
#r "nuget: Standard.Licensing, 1.1.5"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Standard.Licensing as a Cake Addin
#addin nuget:?package=Standard.Licensing&version=1.1.5

// Install Standard.Licensing as a Cake Tool
#tool nuget:?package=Standard.Licensing&version=1.1.5

NuGet NuGet Build status

About

Easy-to-use licensing library for .NET Framework, Mono, .NET Core, and Xamarin products.

This is project is derived from Portable.Licensing library. The purpose of this fork is to add support for more .NET platforms, especially .NET Standard and .NET Core.

There is also a plan to decouple from Bouncy Castle library and use System.Security.Cryptography.Cng for modern .NET platforms.

alternate text is missing from this package README image

Installation

Get Standard.Licensing from nuget.

PM> Install-Package Standard.Licensing

Usage

Create a private and public key for your product

Standard.Licensing uses the Elliptic Curve Digital Signature Algorithmus (ECDSA) to ensure the license cannot be altered after creation.

First you need to create a new public/private key pair for your product:

var keyGenerator = Standard.Licensing.Security.Cryptography.KeyGenerator.Create(); 
var keyPair = keyGenerator.GenerateKeyPair(); 
var privateKey = keyPair.ToEncryptedPrivateKeyString(passPhrase);  
var publicKey = keyPair.ToPublicKeyString();

Store the private key securely and distribute the public key with your product. Normally you create one key pair for each product, otherwise it is possible to use a license with all products using the same key pair. If you want your customer to buy a new license on each major release you can create a key pair for each release and product.

Create the license generator

Now we need something to generate licenses. This could be easily done with the LicenseFactory:

var license = License.New()  
    .WithUniqueIdentifier(Guid.NewGuid())  
    .As(LicenseType.Trial)  
    .ExpiresAt(DateTime.Now.AddDays(30))  
    .WithMaximumUtilization(5)  
    .WithProductFeatures(new Dictionary<string, string>  
        {  
            {"Sales Module", "yes"},  
            {"Purchase Module", "yes"},  
            {"Maximum Transactions", "10000"}  
        })  
    .LicensedTo("John Doe", "john.doe@example.com")  
    .CreateAndSignWithPrivateKey(privateKey, passPhrase);

Now you can take the license and save it to a file:

File.WriteAllText("License.lic", license.ToString(), Encoding.UTF8);

or

license.Save(xmlWriter);

Validate the license in your application

The easiest way to assert the license is in the entry point of your application.

First load the license from a file or resource:

var license = License.Load(...);

Then you can assert the license:

using Standard.Licensing.Validation;

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

Standard.Licensing will not throw any Exception and just return an enumeration of validation failures.

Now you can iterate over possible validation failures:

foreach (var failure in validationFailures)
     Console.WriteLine(failure.GetType().Name + ": " + failure.Message + " - " + failure.HowToResolve);

Or simply check if there is any failure:

if (validationFailures.Any())
   // ...

Make sure to call validationFailures.ToList() or validationFailures.ToArray() before using the result multiple times.

Credits

License

This project is licensed under MIT License.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp1.0 was computed.  netcoreapp1.1 was computed.  netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard1.0 is compatible.  netstandard1.1 was computed.  netstandard1.2 was computed.  netstandard1.3 is compatible.  netstandard1.4 was computed.  netstandard1.5 was computed.  netstandard1.6 was computed.  netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net40 is compatible.  net403 was computed.  net45 is compatible.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen30 was computed.  tizen40 was computed.  tizen60 was computed. 
Universal Windows Platform uap was computed.  uap10.0 was computed. 
Windows Phone wp8 was computed.  wp81 was computed.  wpa81 was computed. 
Windows Store netcore was computed.  netcore45 was computed.  netcore451 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.0

    • No dependencies.
  • .NETFramework 4.5

    • No dependencies.
  • .NETStandard 1.0

  • .NETStandard 1.3

  • .NETStandard 2.0

    • No dependencies.
  • Portable Class Library (.NETFramework 4.0.3, Silverlight 5.0, Windows 8.0, WindowsPhone 8.0)

    • No dependencies.
  • Portable Class Library (.NETFramework 4.5, Windows 8.0, WindowsPhone 8.0, WindowsPhoneApp 8.1)

    • No dependencies.

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Package Description

GitHub repositories

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Version Downloads Last updated
1.1.7 8,106 1/4/2024
1.1.5 1,282,470 2/17/2018

v1.1.5

- republish with support netstandard1.0, netstandard1.3, netstandard2.0, PCL, and .NET Framework 4.0+