iOS throwing error when MS authenticator app installed

[sudheerkarumanchi]

We observed the following error when trying to sign in the iOS app using domain mail id and when MS Authenticator app installed on the same device.

flutter: Authentication error
flutter: Error getting token. Unspecified reason

Looks like, it's not retrieving token or validating.

Could you please suggest what can we do to figure it out and resolve the issue? thanks.

PS: When we looked in Google on this issue, we noticed a property MSALBrokeredAvailabiliity. If it is set to none, app will get the token as expected but we are not sure how to include this in the current library and verify. Shared here for your reference.

/**
Setting to define MSAL behavior when Microsoft Authenticator application is installed.
By default, MSAL will always try to use Microsoft Authenticator application when getting a token interactively.
Set this property to MSALBrokeredAvailabilityNone to disable this behavior
*/
@Property (class) MSALBrokeredAvailability brokerAvailability;

https://github.com/AzureAD/microsoft-authentication-library-for-objc/blob/dev/MSAL/src/public/configuration/MSALGlobalConfig.h#L74

[Dannyisadog]

@sudheerkarumanchi

I met the same issue and I add the code below in my AppDelegate then work fine

override  func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
    return MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String)
}

reference: AzureAD/microsoft-authentication-library-for-objc#1109

[govarthananve]

@fabio21 Any update on this
I am also getting this error

[keenan-chiasson]

Solution for anyone still struggling and doesn't want to disable broker availability

I had a similar issue in SwiftUI where I had already added this code to appDelegate.

func application(_ application: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any]) -> Bool {
	return MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String)
}

The error was something like

Could not acquire token: Error Domain=MSALErrorDomain Code=-50000 "(null)" UserInfo={MSALErrorDescriptionKey=application did not receive response from broker.

It happened on devices that had MS Authenticator app installed. However I realized I was also using a sceneDelegate like this to get the root view controller

func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
        let config = UISceneConfiguration(name: "MainScene", sessionRole: .windowApplication)
        config.delegateClass = MainSceneDelegate.self
        return config
    }

The class for my scene delegate was like this

class MainSceneDelegate: NSObject, UIWindowSceneDelegate, ObservableObject {
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        guard let windowScene = scene as? UIWindowScene, let window = windowScene.keyWindow, let rootViewController = window.rootViewController else {
            print("Root view controller not found.")
            return
        }
        AuthManager.shared.set(rootViewController)
    }
}

All I had to do to fix the error was add this code inside my MainSceneDelegate class

func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
    guard let urlContext = URLContexts.first else { return }
    
    let url = urlContext.url
    let sourceApp = urlContext.options.sourceApplication
    
    MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: sourceApp)
}

Hope this helps someone!

[mansibarodia10057]

Adding the solution that worked in my case for SwiftUI app.

The app I am working on wasn't explicitly using SceneDelegate, hence I had initially added function only in App Delegate which didn't do anything.

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
        return MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String)
    }
}

Later based on keenan's post and Microsoft docs, I decided to also add Scene Delegate and it's functions and Microsoft sign in using Authenticator worked. Had to add both App Delegate and Scene Delegate. Sharing sample code below, incase if it helps anyone.

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
        return MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String)
    }
    
    func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
        guard let urlContext = URLContexts.first else { return }
        
        let url = urlContext.url
        let sourceApp = urlContext.options.sourceApplication
        
        MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: sourceApp)
    }
}

class SceneDelegate: NSObject, UIWindowSceneDelegate {
    var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        guard let _ = (scene as? UIWindowScene) else { return }
    }

    func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
        guard let urlContext = URLContexts.first else { return }

        let url = urlContext.url
        let sourceApp = urlContext.options.sourceApplication

        MSALPublicClientApplication.handleMSALResponse(url, sourceApplication: sourceApp)
    }
}



@main
struct MyProjectApp: App {
	@UIApplicationDelegateAdaptor(AppDelegate.self) var delegate

    var body: some SwiftUI.Scene {
        WindowGroup {
            ContentView()
        }
    }
}