Standard.Licensing
1.2.0
dotnet add package Standard.Licensing --version 1.2.0
NuGet\Install-Package Standard.Licensing -Version 1.2.0
<PackageReference Include="Standard.Licensing" Version="1.2.0" />
paket add Standard.Licensing --version 1.2.0
#r "nuget: Standard.Licensing, 1.2.0"
// Install Standard.Licensing as a Cake Addin #addin nuget:?package=Standard.Licensing&version=1.2.0 // Install Standard.Licensing as a Cake Tool #tool nuget:?package=Standard.Licensing&version=1.2.0
Standard.Licensing
Easy-to-use licensing library for .NET and .NET Framework products.
Installation
Get Standard.Licensing from NuGet.
dotnet add package Standard.Licensing
Usage
Create a private and public key for your product
Standard.Licensing uses the Elliptic Curve Digital Signature Algorithm (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(systemDateTime: DateTime.Now)
.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.
Third Party Projects
- PatrickRainer/LicenseManager - A WPF license manager for developers to generate and validate licenses.
- skst/LicenseManager - GUI front-end for Standard.Licensing project.
Credits
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.
- dnauck/Portable.Licensing for the original work.
License
This project is licensed under MIT License.
Made with ☕ by Junian.dev.
Product | Versions Compatible and additional computed target framework versions. |
---|---|
.NET | net5.0 was computed. net5.0-windows was computed. net6.0 is compatible. 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 is compatible. 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 | netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed. |
.NET Standard | netstandard2.0 is compatible. netstandard2.1 was computed. |
.NET Framework | net461 is compatible. 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 | tizen40 was computed. tizen60 was computed. |
Xamarin.iOS | xamarinios was computed. |
Xamarin.Mac | xamarinmac was computed. |
Xamarin.TVOS | xamarintvos was computed. |
Xamarin.WatchOS | xamarinwatchos was computed. |
-
.NETFramework 4.6.1
- BouncyCastle.Cryptography (>= 2.4.0)
-
.NETStandard 2.0
- BouncyCastle.Cryptography (>= 2.4.0)
-
net6.0
- BouncyCastle.Cryptography (>= 2.4.0)
-
net8.0
- BouncyCastle.Cryptography (>= 2.4.0)
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Package Description |
GitHub repositories
This package is not used by any popular GitHub repositories.
v1.2.0
- Update to the latest BouncyCastle
v1.1.9
- Add custom DateTime to check Expiration date