[Bug] Maui Essentials WebAuthenticator not working in WinUI

[ElliottBrand]

I'm attempting to use WebAuthenticator in Maui Essentials to authenticate a WinUI project, but it's having an issue finding the manifest file. It throws an exception saying:

Could not find file 'C:\WINDOWS\system32\AppxManifest.xml'.

If I add a local version of https://github.com/dotnet/maui/blob/main/src/Essentials/src/WebAuthenticator/WebAuthenticator.uwp.cs into my project (I made PlatformAuthenticateAsync public to test it and just passed the url and callbackUrl in the WebAuthenticatorOptions) and adjust line 51 to:

var doc = XDocument.Load($"{AppDomain.CurrentDomain.BaseDirectory}AppxManifest.xml", LoadOptions.None);

It then finds the file, however, a new error is thrown that says:

System.Runtime.InteropServices.COMException: 'There are no remote procedure calls active on this thread. (0x800706BD)'

Additionally, I set the CallbackUrl to:

new Uri("io.identitymodel.native://callback")

and the Url to:

new Uri("https://demo.identityserver.io")

• WebAuthenticationBroker API that supports all WinAppSDK OS's and application types microsoft/WindowsAppSDK#441

[jamesmontemagno]

Did you add the extension into your Package.appxmanifest?

<Applications>
    <Application Id="App" Executable="$targetnametoken$.exe" EntryPoint="MyApp.App">
        <Extensions>
            <uap:Extension Category="windows.protocol">
            <uap:Protocol Name="myapp">
                <uap:DisplayName>My App</uap:DisplayName>
            </uap:Protocol>
            </uap:Extension>
        </Extensions>
    </Application>
</Applications>

[ElliottBrand]

Yeah, here's the Package.appxmanifest file from this sample app.

<?xml version="1.0" encoding="utf-8"?>

<Package
  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
  IgnorableNamespaces="uap rescap">

  <Identity
    Name="DC54F990-A6CD-4BED-B2AE-1942F4470BCC"
    Publisher="CN=User Name"
    Version="1.0.0.0" />

  <Properties>
    <DisplayName>MauiAppSample</DisplayName>
    <PublisherDisplayName>Microsoft</PublisherDisplayName>
    <Logo>Assets\appiconStoreLogo.png</Logo>
  </Properties>

  <Dependencies>
    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
  </Dependencies>

  <Resources>
    <Resource Language="x-generate"/>
  </Resources>

  <Applications>
    <Application Id="App"
      Executable="$targetnametoken$.exe"
      EntryPoint="$targetentrypoint$">
      <uap:VisualElements
        DisplayName="MauiAppSample"
        Description="MauiAppSample"
        BackgroundColor="transparent"
        Square150x150Logo="Assets\appiconMediumTile.png"
        Square44x44Logo="Assets\appiconLogo.png">
        <uap:DefaultTile
          Wide310x150Logo="Assets\appiconWideTile.png"
          Square71x71Logo="Assets\appiconSmallTile.png"
          Square310x310Logo="Assets\appiconLargeTile.png"
          ShortName="MauiAppFileInput">
          <uap:ShowNameOnTiles>
            <uap:ShowOn Tile="square150x150Logo"/>
            <uap:ShowOn Tile="wide310x150Logo"/>
          </uap:ShowNameOnTiles>
        </uap:DefaultTile >
        <uap:SplashScreen Image="Assets\appiconfgSplashScreen.png" />
      </uap:VisualElements>
      <Extensions>
        <uap:Extension Category="windows.protocol">
          <uap:Protocol Name="io.identitymodel.native">
            <uap:DisplayName>MauiAppSample</uap:DisplayName>
          </uap:Protocol>
        </uap:Extension>
      </Extensions>
    </Application>
  </Applications>

  <Capabilities>
    <rescap:Capability Name="runFullTrust" />
  </Capabilities>

</Package>

[ElliottBrand]

In MainPage.xaml.cs I have a using directive for OidcClient (and a few others that can be easily resolved in the editor)

using IdentityModel.OidcClient

Variables

OidcClient _oidcClient;
LoginResult _loginResult;

and a method to handle a login button click:

async void OnLoginButtonClicked(object sender, EventArgs e)
{
    var options = new OidcClientOptions
    {
        Authority = "https://demo.identityserver.io",
        ClientId = "interactive.public",
        Scope = "openid profile email api offline_access",
        RedirectUri = "io.identitymodel.native://callback",
        Browser = new Browser()
    };

    _oidcClient = new OidcClient(options);
    _loginResult = await _oidcClient.LoginAsync(new LoginRequest());
    if (_loginResult.IsError)
    {
        Console.WriteLine("ERROR: {0}", _loginResult.Error);
        return;
    }
}

And the Browser.cs file. As I mentioned initially, I'm calling WebAuthenticator.PlatformAuthenticateAsync(authenticatorOptions) in my local file. Except for a few namespace adjustments to prevent conflicts and the adjustment to line 51, it's the same file as what's used in Maui Essentials.

using IdentityModel.OidcClient.Browser;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace MauiAppSample
{
    public class Browser : IBrowser
    {
        public async Task<BrowserResult> InvokeAsync(BrowserOptions options, CancellationToken cancellationToken = default)
        {
            var authenticatorOptions = new Microsoft.Maui.Essentials.WebAuthenticatorOptions
            {
                CallbackUrl = new Uri("io.identitymodel.native://callback"),
                Url = new Uri("https://demo.identityserver.io")
            };

           // WebAuthenticator.PlatformAuthenticateAsync is in a local file that's altered to locate the 
           // AppxManifest.xml file, as mentioned in my initial post.
            Microsoft.Maui.Essentials.WebAuthenticatorResult authResult =
                await WebAuthenticator.PlatformAuthenticateAsync(authenticatorOptions);
            return new BrowserResult()
            {
                Response = ParseAuthenticatorResult(authResult)
            };
        }

        string ParseAuthenticatorResult(Microsoft.Maui.Essentials.WebAuthenticatorResult result)
        {
            string code = result?.Properties["code"];
            string scope = result?.Properties["scope"];
            string state = result?.Properties["state"];
            string sessionState = result?.Properties["session_state"];
            return $"{"io.identitymodel.native://callback"}#code={code}&scope={scope}&state={state}&session_state={sessionState}";
        }
    }
}

[Berets]

Any news about this? Same error here

[ElliottBrand]

Sorry, no news. I'm still experiencing it too.

[hexjourney]

Same error

[RichardCain]

Same here

[samifahmy]

any news i have same error too?

[enisn]

same error

[enisn]

I've tried on a couple of different computers but the reason is the same. Also, I've tried clean installation of Maui & workloads, and tried on cleanly installed windows but nothing changed.

It tries to find C:\WINDOWS\system32\AppxManifest.xml file but it doesn't exist in system32 folder in any windows machine.

Then, I've tried to check my Package.appxmanifest file, I think AppxManifest can't be generated for application and I see it can't be opened in Visual Studio

I think there might be an error in Package.appxmanifest file on MAUI project template. Unfortunetely I'm not pro on Win apps, so I can't see what is wrong with that file.

Note: I've also added windows.protocol extension in that file with VSCode

---

Could anyone get over this issue?

[wenwen60]

Reproduce on windows with VS2022 17.2.0 Preview 2.0 [32215.517.main], attach repro sample
2702.zip.