Samhammer.Authentication.Api 6.0.2

.NET 6.0
dotnet add package Samhammer.Authentication.Api --version 6.0.2
NuGet\Install-Package Samhammer.Authentication.Api -Version 6.0.2
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="Samhammer.Authentication.Api" Version="6.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Samhammer.Authentication.Api --version 6.0.2
#r "nuget: Samhammer.Authentication.Api, 6.0.2"
#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 Samhammer.Authentication.Api as a Cake Addin
#addin nuget:?package=Samhammer.Authentication.Api&version=6.0.2

// Install Samhammer.Authentication.Api as a Cake Tool
#tool nuget:?package=Samhammer.Authentication.Api&version=6.0.2


This provides a way to secure your api with keycloak jwt bearer authentication.

How to add this to your project:
How to use:

Keycloak JWT Authentication

Add it to your api.

public void ConfigureServices(IServiceCollection services)

public void Configure(IApplicationBuilder app)

Api calls requires auhorization header with an JWT token from keycloak.

POST https://myapi/action HTTP/1.1
Auhorization: Bearer JwtTokenContent

If you pass "IConfiguration" instead of "Action<ApiAuthOptions>" to "AddKeycloak" add the following to appsettings.json:

  "ApiAuthOptions": {
    "Issuer": "<<KeycloakTokenIssuerUrl>>",
    "ClientId": "<<ClientIdRepresentingYourApp>>",
    "NameClaim": "<<NameOfClaimWhichShouldBeSetToNameClaim>>"

NameClaim is optional and default value is "preferred_username"

Guest Authentication

Add it to your api.

public void ConfigureServices(IServiceCollection services)

Api calls requires header guestid with an "Version 4 UUID".

POST https://myapi/action HTTP/1.1
guestid: 1c11792b-538f-4908-992d-6570bb268e60

If you pass "IConfiguration" instead of "Action<GuestAuthOptions>" to "AddGuest" you can can override the default settings in appsettings.json:

  "GuestAuthOptions": {
    "Enabled": true,
    "Name": "guest-[GuestID]",    
    "Role": "SomeGuestRole",
    "Validator": "[0-9a-fA-F]{8}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{12}"

Mixed Authentication

You can also setup both authentication types. In the example below jwt keycloak will be the default.

public void ConfigureServices(IServiceCollection services)

You can setup your supported authentication types on each controller action per attribute.

[Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme + ", " + GuestAuthenticationDefaults.AuthenticationScheme)]
public async Task<IActionResult> ActionForBoth()

public async Task<IActionResult> ActionForGuests()


The library provides extension methods for authentication client

Currently, we have the AccessTokenManagementExtensions class which provides an extension method for ClientAccessTokenManagementOptions to add a client with options monitor support.

How to use in Program.cs

builder.Services.AddAccessTokenManagement((sp, options) =>
        options.Client.AddWithOptionsMonitor<ApiAuthOptions>(clientName, sp, authOptions => new ClientCredentialsTokenRequest
            Address = authOptions.AccessTokenUrl,
            ClientId = authOptions.ClientId,
            ClientSecret = authOptions.ClientSecret

## Contribute

#### How to publish a nuget package
- Create a tag and let the github action do the publishing for you
Product Versions
.NET net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
Compatible target framework(s)
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NuGet packages

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Version Downloads Last updated
6.0.2 27 3/30/2023
6.0.1 2,384 5/16/2022
6.0.0 4,569 1/20/2022
1.2.2 329 1/12/2022
1.2.1 4,112 10/27/2020
1.2.0 320 10/26/2020
1.1.0 4,887 6/8/2020
1.0.0 1,373 4/22/2020