OpenIddict

The OpenID Connect server you'll be addicted to.

What's OpenIddict?

OpenIddict aims at providing a simple and easy-to-use solution to implement an OpenID Connect server in any ASP.NET Core 1.x or 2.x application.

OpenIddict is based on AspNet.Security.OpenIdConnect.Server (codenamed ASOS) to control the OpenID Connect authentication flow and can be used with any membership stack, including ASP.NET Core Identity.

OpenIddict fully supports the code/implicit/hybrid flows and the client credentials/resource owner password grants. You can also create your own custom grant types.

Note: OpenIddict uses Entity Framework Core by default, but you can also provide your own store.

Note: the OpenIddict 2.x packages are only compatible with ASP.NET Core 2.x. If your application targets ASP.NET Core 1.x, use the OpenIddict 1.x packages.

Why an OpenID Connect server?

Adding an OpenID Connect server to your application allows you to support token authentication. It also allows you to manage all your users using local password or an external identity provider (e.g. Facebook or Google) for all your applications in one central place, with the power to control who can access your API and the information that is exposed to each client.

Samples

Specialized samples can be found in the samples repository:

• Authorization code flow sample
• Implicit flow sample
• Password flow sample
• Client credentials flow sample
• Refresh flow sample

Samples for ASP.NET Core 1.x can be found in the master branch of the samples repository.

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Getting started

To use OpenIddict, you need to:

• Install the latest .NET Core 2.x tooling and update your packages to reference the ASP.NET Core 2.x packages.

• Have an existing project or create a new one: when creating a new project using Visual Studio's default ASP.NET Core template, using individual user accounts authentication is strongly recommended. When updating an existing project, you must provide your own AccountController to handle the registration process and the authentication flow.

• Add the appropriate MyGet repositories to your NuGet sources. This can be done by adding a new NuGet.Config file at the root of your solution:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="NuGet" value="https://api.nuget.org/v3/index.json" />
    <add key="aspnet-contrib" value="https://www.myget.org/F/aspnet-contrib/api/v3/index.json" />
  </packageSources>
</configuration>

• Update your .csproj file to reference AspNet.Security.OAuth.Validation and the OpenIddict packages:

<PackageReference Include="AspNet.Security.OAuth.Validation" Version="2.0.0-*" />
<PackageReference Include="OpenIddict" Version="2.0.0-*" />
<PackageReference Include="OpenIddict.EntityFrameworkCore" Version="2.0.0-*" />
<PackageReference Include="OpenIddict.Mvc" Version="2.0.0-*" />

• Configure the OpenIddict services in Startup.ConfigureServices:

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc();

    services.AddDbContext<ApplicationDbContext>(options =>
    {
        // Configure the context to use Microsoft SQL Server.
        options.UseSqlServer(configuration["Data:DefaultConnection:ConnectionString"]);

        // Register the entity sets needed by OpenIddict.
        // Note: use the generic overload if you need
        // to replace the default OpenIddict entities.
        options.UseOpenIddict();
    });

    // Register the Identity services.
    services.AddIdentity<ApplicationUser, IdentityRole>()
        .AddEntityFrameworkStores<ApplicationDbContext>()
        .AddDefaultTokenProviders();

    // Register the OAuth2 validation handler.
    services.AddAuthentication()
        .AddOAuthValidation();

    // Register the OpenIddict services.
    // Note: use the generic overload if you need
    // to replace the default OpenIddict entities.
    services.AddOpenIddict(options =>
    {
        // Register the Entity Framework stores.
        options.AddEntityFrameworkCoreStores<ApplicationDbContext>();

        // Register the ASP.NET Core MVC binder used by OpenIddict.
        // Note: if you don't call this method, you won't be able to
        // bind OpenIdConnectRequest or OpenIdConnectResponse parameters.
        options.AddMvcBinders();

        // Enable the token endpoint (required to use the password flow).
        options.EnableTokenEndpoint("/connect/token");

        // Allow client applications to use the grant_type=password flow.
        options.AllowPasswordFlow();

        // During development, you can disable the HTTPS requirement.
        options.DisableHttpsRequirement();
    });
}

Note: for more information about the different options and configurations available, check out Configuration and options in the project wiki.

• **Make sure the authentication middleware is registered before all the other middleware, including app.UseMvc():

public void Configure(IApplicationBuilder app)
{
    app.UseAuthentication();

    app.UseMvc();
}

• Update your Entity Framework context registration to register the OpenIddict entities:

services.AddDbContext<ApplicationDbContext>(options =>
{
    // Configure the context to use Microsoft SQL Server.
    options.UseSqlServer(configuration["Data:DefaultConnection:ConnectionString"]);

    // Register the entity sets needed by OpenIddict.
    // Note: use the generic overload if you need
    // to replace the default OpenIddict entities.
    options.UseOpenIddict();
});

Note: if you change the default entity primary key (e.g. to int or Guid instead of string), make sure to use the services.AddOpenIddict() extension accepting a TKey generic argument and use the generic options.UseOpenIddict<TKey>() overload:

services.AddOpenIddict<Guid>()
    .AddEntityFrameworkCoreStores<ApplicationDbContext>()

services.AddDbContext<ApplicationDbContext>(options =>
{
    // Configure the context to use Microsoft SQL Server.
    options.UseSqlServer(configuration["Data:DefaultConnection:ConnectionString"]);

    options.UseOpenIddict<Guid>();
});

• Create your own authorization controller:

To support the password or the client credentials flow, you must provide your own token endpoint action. To enable authorization code/implicit flows support, you'll similarly have to create your own authorization endpoint action and your own views/view models.

The Mvc.Server sample comes with an AuthorizationController that supports both the password flow and the authorization code flow and that you can easily reuse in your application.

• Enable the corresponding flows in the OpenIddict options:

public void ConfigureServices(IServiceCollection services)
{
    // Register the OpenIddict services.
    // Note: use the generic overload if you need
    // to replace the default OpenIddict entities.
    services.AddOpenIddict(options =>
    {
        // Register the Entity Framework stores.
        options.AddEntityFrameworkCoreStores<ApplicationDbContext>();

        // Register the ASP.NET Core MVC binder used by OpenIddict.
        // Note: if you don't call this method, you won't be able to
        // bind OpenIdConnectRequest or OpenIdConnectResponse parameters.
        options.AddMvcBinders();

        // Enable the authorization and token endpoints (required to use the code flow).
        options.EnableAuthorizationEndpoint("/connect/authorize")
               .EnableTokenEndpoint("/connect/token");

        // Allow client applications to use the code flow.
        options.AllowAuthorizationCodeFlow();

        // During development, you can disable the HTTPS requirement.
        options.DisableHttpsRequirement();
    });
}

• Register your client application:

// Create a new service scope to ensure the database context is correctly disposed when this methods returns.
using (var scope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope())
{
    var context = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
    await context.Database.EnsureCreatedAsync();

    // Note: when using a custom entity or a custom key type, replace OpenIddictApplication by the appropriate type.
    var manager = scope.ServiceProvider.GetRequiredService<OpenIddictApplicationManager<OpenIddictApplication>>();

    if (await manager.FindByClientIdAsync("[client identifier]", cancellationToken) == null)
    {
        var application = new OpenIddictApplication
        {
            ClientId = "[client identifier]",
            RedirectUri = "[redirect uri]"
        };
    
        await manager.CreateAsync(application, "[client secret]", cancellationToken);
    }
}

Resources

Looking for additional resources to help you get started? Don't miss these interesting blog posts/books:

• Setting up ASP.NET v5 (vNext) to use JWT tokens (using OpenIddict) by Sean Walsh
• Using OpenIddict to easily add token authentication to your .NET web apps by Josh Comley
• Authorizing your .NET Core MVC6 API requests with OpenIddict and Identity by Kerry Ritter
• Creating your own OpenID Connect server with ASOS by Kévin Chalet
• Bearer Token Authentication in ASP.NET Core by Mike Rousos (for the Microsoft .NET Web Development and Tools blog)
• ASP.NET Core and Angular 2 by Valerio De Sanctis
• Implementing simple token authentication in ASP.NET Core with OpenIddict by Kévin Chalet

Support

Need help or wanna share your thoughts? Don't hesitate to join us on Gitter or ask your question on StackOverflow:

• Gitter: https://gitter.im/openiddict/openiddict-core
• StackOverflow: https://stackoverflow.com/questions/tagged/openiddict

Contributors

OpenIddict is actively maintained by Kévin Chalet. Contributions are welcome and can be submitted using pull requests.

Special thanks to Christopher McCrum and Data Citadel for their incredible support.

License

This project is licensed under the Apache License. This means that you can use, modify and distribute it freely. See http://www.apache.org/licenses/LICENSE-2.0.html for more details.