Keycloak.AuthServices

🔐 Easy Authentication and Authorization with Keycloak in .NET.

Package	Version	Description
Keycloak.AuthServices.Authentication		Keycloak Authentication JWT + OIDC
Keycloak.AuthServices.Authorization		Authorization Services. Use Keycloak as authorization server
Keycloak.AuthServices.Authorization.TokenIntrospection		Token introspection for lightweight access tokens (KC 24+)
Keycloak.AuthServices.Sdk		HTTP API integration with Keycloak
Keycloak.AuthServices.Sdk.Kiota		HTTP API integration with Keycloak based on OpenAPI
Keycloak.AuthServices.OpenTelemetry		OpenTelemetry support
Keycloak.AuthServices.Templates		dotnet new templates

Documentation

For Developer Documentation see: https://nikiforovall.github.io/keycloak-authorization-services-dotnet

API Reference

See: https://nikiforovall.github.io/keycloak-authorization-services-dotnet-docs

Getting Started

Install packages:

dotnet add package Keycloak.AuthServices.Authentication

// Program.cs
using Keycloak.AuthServices.Authentication;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddKeycloakWebApiAuthentication(builder.Configuration);
builder.Services.AddAuthorization();

var app = builder.Build();

app.UseAuthentication();
app.UseAuthorization();

app.MapGet("/", () => "Hello World!").RequireAuthorization();

app.Run();

In this example, configuration is based on appsettings.json.

//appsettings.json
{
    "Keycloak": {
        "realm": "Test",
        "auth-server-url": "http://localhost:8080/",
        "ssl-required": "none",
        "resource": "test-client",
        "verify-token-audience": false,
        "credentials": {
            "secret": ""
        },
        "confidential-port": 0
    }
}

Example - Add Authorization

With Keycloak.AuthServices.Authorization, you can implement role-based authorization in your application. This package allows you to define policies based on roles. Also, you can use Keycloak as Authorization Server. It is a powerful way to organize and apply authorization polices centrally.

var builder = WebApplication.CreateBuilder(args);

var host = builder.Host;
var configuration = builder.Configuration;
var services = builder.Services;

services.AddKeycloakWebApiAuthentication(configuration);

services.AddAuthorization(options =>
    {
        options.AddPolicy("AdminAndUser", builder =>
        {
            builder
                .RequireRealmRoles("User") // Realm role is fetched from token
                .RequireResourceRoles("Admin"); // Resource/Client role is fetched from token
        });
    })
    .AddKeycloakAuthorization(configuration);

var app = builder.Build();

app.UseAuthentication();
app.UseAuthorization();

app.MapGet("/hello", () => "[]")
    .RequireAuthorization("AdminAndUser");

app.Run();

Example - Invoke Admin API

var services = new ServiceCollection();
services.AddKeycloakAdminHttpClient(new KeycloakAdminClientOptions
{
    AuthServerUrl = "http://localhost:8080/",
    Realm = "master",
    Resource = "admin-api",
});

var sp = services.BuildServiceProvider();
var client = sp.GetRequiredService<IKeycloakRealmClient>();

var realm = await client.GetRealmAsync("Test");

Build and Development

dotnet cake --target build

dotnet cake --target test

dotnet pack -o ./Artefacts