Open ID Connect Client

A small OpenID Connect client for testing authentication flows. The app accepts client settings such as authority, client ID, client secret, scope, and redirect URI, then signs in, refreshes tokens, signs out, and displays returned tokens and claims.

Current App

The application is now implemented with .NET MAUI in OpenIdConnectClient.Maui. It is wired to the shared ViewModels in OpenIdConnectClient.ViewModels and targets the default MAUI platforms:

• Android
• iOS
• Mac Catalyst
• Windows

The previous WPF implementation has been removed after manual verification of the MAUI login flow.

Redirect URI

The default redirect URI is:

oidcc://callback

Register this exact redirect URI in your OpenID Connect provider/client configuration. The MAUI project includes platform callback registration for this scheme:

• Android: Platforms/Android/WebAuthenticationCallbackActivity.cs
• iOS: Platforms/iOS/Info.plist
• Mac Catalyst: Platforms/MacCatalyst/Info.plist
• Windows: Platforms/Windows/Package.appxmanifest

Default Demo Provider

The app opens with Duende's public demo IdentityServer configured:

Authority: https://demo.duendesoftware.com
Client ID: interactive.public
Client secret: <blank>
Scope: openid profile email offline_access api
Redirect URI: oidcc://callback

The interactive.public client uses authorization code flow with PKCE and does not require a client secret. For manual login testing, Duende documents the demo users as alice / alice and bob / bob.

Authentication Browser

Android, iOS, and Mac Catalyst use .NET MAUI WebAuthenticator for the interactive browser flow. The Windows target uses a MAUI WebView fallback for the same OIDC browser adapter because Microsoft's MAUI documentation currently notes that WebAuthenticator is not working on Windows.

Build

Build the Windows MAUI target:

dotnet build OpenIdConnectClient.Maui\OpenIdConnectClient.Maui.csproj -f net10.0-windows10.0.19041.0

Build the other MAUI targets:

dotnet build OpenIdConnectClient.Maui\OpenIdConnectClient.Maui.csproj -f net10.0-android
dotnet build OpenIdConnectClient.Maui\OpenIdConnectClient.Maui.csproj -f net10.0-ios
dotnet build OpenIdConnectClient.Maui\OpenIdConnectClient.Maui.csproj -f net10.0-maccatalyst

Run On Windows

Build first, then launch the generated executable:

dotnet build OpenIdConnectClient.Maui\OpenIdConnectClient.Maui.csproj -f net10.0-windows10.0.19041.0
.\OpenIdConnectClient.Maui\bin\Debug\net10.0-windows10.0.19041.0\win-x64\OpenIdConnectClient.Maui.exe

The Windows target is configured with WindowsAppSDKSelfContained=true so the app can run even when the Windows App SDK runtime is not registered globally on the machine.

Usage

1. Start the MAUI app.
2. Enter the OpenID Connect authority, client ID, client secret, scope, and redirect URI.
3. Select Log In to authenticate through the platform browser flow.
4. Review the access token, identity token, refresh token, expiration, and claims. If authentication fails, review the Error and Error Description fields.
5. Use Refresh, Auto Refresh, and Log Out as needed.

Validation

The MAUI project builds for Windows, Android, iOS, and Mac Catalyst. Manual Windows verification has completed against the Duende demo provider with the interactive.public client and the alice demo account.