add device owner verification for backup

deltachat · Oct 19, 2024 · dd396c6 · dd396c6
1 parent 2f09291
commit dd396c6
Showing 1 changed file with 23 additions and 1 deletion.
diff --git a/deltachat-ios/Controller/Settings/ChatsAndMediaViewController.swift b/deltachat-ios/Controller/Settings/ChatsAndMediaViewController.swift
@@ -1,6 +1,7 @@
 import UIKit
 import DcCore
 import Intents
+import LocalAuthentication
 
 internal final class ChatsAndMediaViewController: UITableViewController {
 
@@ -157,7 +158,7 @@ internal final class ChatsAndMediaViewController: UITableViewController {
         case .mediaQuality: showMediaQuality()
         case .downloadOnDemand: showDownloadOnDemand()
         case .receiptConfirmation: break
-        case .exportBackup: createBackup()
+        case .exportBackup: authenticateAndCreateBackup()
         }
     }
 
@@ -171,6 +172,27 @@ internal final class ChatsAndMediaViewController: UITableViewController {
 
     // MARK: - actions
 
+    private func authenticateAndCreateBackup() {
+        let localAuthenticationContext = LAContext()
+        var error: NSError?
+        if localAuthenticationContext.canEvaluatePolicy(.deviceOwnerAuthentication, error: &error) {
+            let reason = String.localized("pref_backup_explain")
+            localAuthenticationContext.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason) { [weak self] success, error in
+                DispatchQueue.main.async {
+                    guard let self = self else { return }
+                    if success {
+                        self.createBackup()
+                    } else {
+                        logger.info("local authentication aborted: \(String(describing: error))")
+                    }
+                }
+            }
+        } else {
+            logger.info("local authentication unavailable: \(String(describing: error))")
+            createBackup()
+        }
+    }
+
     private func createBackup() {
         let alert = UIAlertController(title: String.localized("pref_backup_export_explain"), message: nil, preferredStyle: .safeActionSheet)
         alert.addAction(UIAlertAction(title: String.localized("pref_backup_export_start_button"), style: .default, handler: { [weak self] _ in