Dactyloidae iOS initial commit

mobile/ios/Client/Frontend/AuthenticationManager/AppAuthenticator.swift

@@ -0,0 +1,55 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+import Shared
+import SwiftKeychainWrapper
+import LocalAuthentication
+
+class AppAuthenticator {
+    static func presentAuthenticationUsingInfo(_ authenticationInfo: AuthenticationKeychainInfo, touchIDReason: String, success: (() -> Void)?, cancel: (() -> Void)?, fallback: (() -> Void)?) {
+        if authenticationInfo.useTouchID {
+            let localAuthContext = LAContext()
+            localAuthContext.localizedFallbackTitle = AuthenticationStrings.enterPasscode
+            localAuthContext.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: touchIDReason) { didSucceed, error in
+                if didSucceed {
+                    // Update our authentication info's last validation timestamp so we don't ask again based
+                    // on the set required interval
+                    authenticationInfo.recordValidation()
+                    KeychainWrapper.sharedAppContainerKeychain.setAuthenticationInfo(authenticationInfo)
+                    DispatchQueue.main.async {
+                        success?()
+                    }
+                    return
+                }
+                
+                guard let authError = error,
+                          let code = LAError.Code(rawValue: authError._code) else {
+                    return
+                }
+
+                DispatchQueue.main.async {
+                    switch code {
+                    case .userFallback, .touchIDNotEnrolled, .touchIDNotAvailable, .touchIDLockout:
+                        fallback?()
+                    case .userCancel:
+                        cancel?()
+                    default:
+                        cancel?()
+                    }
+                }
+            }
+        } else {
+            fallback?()
+        }
+    }
+
+    static func presentPasscodeAuthentication(_ presentingNavController: UINavigationController?, delegate: PasscodeEntryDelegate?) {
+        let passcodeVC = PasscodeEntryViewController()
+        passcodeVC.delegate = delegate
+        let navController = UINavigationController(rootViewController: passcodeVC)
+        navController.modalPresentationStyle = .formSheet
+        presentingNavController?.present(navController, animated: true, completion: nil)
+    }
+}