Unlock app with biometrics (#271)

* Prevent app lock completely in macOS

* Add missing Face ID metadata for biometrics auth

* Ensure MainActor

* Reword option

* Fix lock logic on launch

CHANGELOG.md

@@ -9,8 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- 3D Touch items. [#267](https://github.com/passepartoutvpn/passepartout-apple/pull/267)
-- Prompt for password interactively. [#3](https://github.com/passepartoutvpn/passepartout-apple/issues/3)
+- Option to lock app when entering background (iOS). [#270](https://github.com/passepartoutvpn/passepartout-apple/pull/270)
+- 3D Touch items (iOS). [#267](https://github.com/passepartoutvpn/passepartout-apple/pull/267)
+- Prompt for password interactively. [#259](https://github.com/passepartoutvpn/passepartout-apple/pull/259)
 - Ukranian translations (Dmitry Chirkin). [#243](https://github.com/passepartoutvpn/passepartout-apple/pull/243)
 - Restore DNS "Domain" setting. [#260](https://github.com/passepartoutvpn/passepartout-apple/pull/260)
 - OpenVPN: Full implementation of Tunnelblick XOR patch (tmthecoder). [#245](https://github.com/passepartoutvpn/passepartout-apple/pull/245), [tunnelkit#255][https://github.com/passepartoutvpn/tunnelkit/pull/255]

Passepartout/App/Info.plist

@@ -46,6 +46,8 @@
 	</array>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSFaceIDUsageDescription</key>
+	<string>dummy</string>
 	<key>NSHumanReadableCopyright</key>
 	<string>$(CFG_COPYRIGHT)</string>
 	<key>NSLocationWhenInUseUsageDescription</key>

Passepartout/App/PassepartoutApp.swift

@@ -24,7 +24,6 @@
 //
 
 import SwiftUI
-import LocalAuthentication
 import PassepartoutLibrary
 
 @main
@@ -35,12 +34,8 @@ struct PassepartoutApp: App {
 
     @SceneBuilder var body: some Scene {
         WindowGroup {
-            LockableView(
-                reason: L10n.Global.Messages.unlockApp,
-                locksInBackground: $locksInBackground,
-                content: MainView.init,
-                lockedContent: LogoView.init
-            ).withoutTitleBar()
+            mainView
+                .withoutTitleBar()
                 .onIntentActivity(IntentDispatcher.connectVPN)
                 .onIntentActivity(IntentDispatcher.disableVPN)
                 .onIntentActivity(IntentDispatcher.enableVPN)
@@ -51,6 +46,19 @@ struct PassepartoutApp: App {
                 .onIntentActivity(IntentDispatcher.untrustCurrentNetwork)
         }
     }
+
+    private var mainView: some View {
+        #if targetEnvironment(macCatalyst)
+        MainView()
+        #else
+        LockableView(
+            reason: L10n.Global.Messages.unlockApp,
+            locksInBackground: $locksInBackground,
+            content: MainView.init,
+            lockedContent: LogoView.init
+        )
+        #endif
+    }
 }
 
 extension View {

Passepartout/App/Reusable/LockableView.swift

@@ -49,29 +49,21 @@ struct LockableView<Content: View, LockedContent: View>: View {
                 lockedContent()
             }
         }.onChange(of: scenePhase, perform: onScenePhase)
+        .onAppear {
+            if !didAppear && locksInBackground {
+                didAppear = true
+                isLocked = true
+            }
+        }
     }
 
     private func onScenePhase(_ scenePhase: ScenePhase) {
         switch scenePhase {
         case .active:
-            #if targetEnvironment(macCatalyst)
-            break
-            #else
-            if !didAppear {
-                didAppear = true
-                if locksInBackground {
-                    isLocked = true
-                }
-            }
             unlockIfNeeded()
-            #endif
 
         case .inactive:
-            #if targetEnvironment(macCatalyst)
-            break
-            #else
             lockIfNeeded()
-            #endif
 
         default:
             break
@@ -86,17 +78,23 @@ struct LockableView<Content: View, LockedContent: View>: View {
     }
 
     func unlockIfNeeded() {
+        guard locksInBackground else {
+            isLocked = false
+            return
+        }
         guard isLocked else {
             return
         }
         let context = LAContext()
+        let policy: LAPolicy = .deviceOwnerAuthentication
         var error: NSError?
-        guard context.canEvaluatePolicy(.deviceOwnerAuthentication, error: &error) else {
+        guard context.canEvaluatePolicy(policy, error: &error) else {
+            isLocked = false
             return
         }
-        Task {
+        Task { @MainActor in
             do {
-                let isAuthorized = try await context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason)
+                let isAuthorized = try await context.evaluatePolicy(policy, localizedReason: reason)
                 isLocked = !isAuthorized
             } catch {
             }

Passepartout/App/Views/SettingsView.swift

@@ -44,7 +44,9 @@ struct SettingsView: View {
 
     var body: some View {
         List {
+            #if !targetEnvironment(macCatalyst)
             preferencesSection
+            #endif
             aboutSection
         }.toolbar {
             themeCloseItem(presentationMode: presentationMode)

Passepartout/App/en.lproj/InfoPlist.strings

@@ -24,3 +24,5 @@
 //
 
 "NSLocationWhenInUseUsageDescription" = "Access name of current Wi-Fi";
+
+"NSFaceIDUsageDescription" = "Unlock app with Face ID";

Passepartout/AppShared/Constants/SwiftGen+Strings.swift

@@ -898,8 +898,8 @@ internal enum L10n {
         internal static let caption = L10n.tr("Localizable", "settings.items.donate.caption", fallback: "Make a donation")
       }
       internal enum LocksInBackground {
-        /// Lock app in background
-        internal static let caption = L10n.tr("Localizable", "settings.items.locks_in_background.caption", fallback: "Lock app in background")
+        /// Lock app access
+        internal static let caption = L10n.tr("Localizable", "settings.items.locks_in_background.caption", fallback: "Lock app access")
       }
     }
   }

Passepartout/AppShared/en.lproj/Localizable.strings

@@ -321,7 +321,7 @@
 /* MARK: SettingsView */
 
 "settings.title" = "Settings";
-"settings.items.locks_in_background.caption" = "Lock app in background";
+"settings.items.locks_in_background.caption" = "Lock app access";
 "settings.items.donate.caption" = "Make a donation";
 
 /* MARK: AboutView */