C#/NetStandard OpenID Connect Client Library for native Applications

Supported platforms: netstandard14, desktop .NET, UWP, .NET Core, Xamarin iOS & Android. Nuget.

Certified OpenID Connect relying party implementation.

Description

OidcClient is an implemenation of the OIDC/OAuth 2 for native apps specification for C#.

Manual Mode

In manual mode, OidcClient helps you with creating the necessary start URL and state parameters, but you need to coordinate with whatever browser you want to use, e.g.

var options = new OidcClientOptions
{
    Authority = _authority,
    ClientId = "native.hybrid",
    RedirectUri = redirectUri,
    Scope = "openid profile api"
};

var client = new OidcClient(options);

// generate start URL, state, nonce, code challenge
var state = await client.PrepareLoginAsync();

When the browser work is done, OidcClient can take over to process the response, get the access/refresh tokens, contact userinfo endpoint etc..

var result = await client.ProcessResponseAsync(data, state);

The result will contain the tokens and the claims of the user.

Automatic Mode

In automatic mode, you can encapsulate all browser interactions by implementing the IBrowser interface.

var options = new OidcClientOptions
{
    Authority = _authority,
    ClientId = "native.hybrid",
    RedirectUri = redirectUri,
    Scope = "openid profile api",
    Browser = new SystemBrowser(port: 7890)
};

var client = new OidcClient(options);

Once that is done, authentication and token requests become one line of code:

var result = await client.LoginAsync();

Logging

OidcClient has support for the standard .NET logging facilities, e.g. using Serilog:

var serilog = new LoggerConfiguration()
    .MinimumLevel.Verbose()
    .Enrich.FromLogContext()
    .WriteTo.LiterateConsole(outputTemplate: "[{Timestamp:HH:mm:ss} {Level}] {SourceContext}{NewLine}{Message}{NewLine}{Exception}{NewLine}")
    .CreateLogger();

options.LoggerFactory.AddSerilog(serilog);

Samples

See here for samples using WinForms, Console and Xamarin iOS/Android.