애플로그인 구현하기 (Firebase와 Apple Sign with Apple)

npm install -g firebase npm install -g firebase-tools firebase login firebase init

firebase deploy

// // FirebaseAuthentication.swift // AlarmPeel // // Created by JingyuJung on 2019/11/18. // Copyright © 2019 JingyuJung. All rights reserved. // import Foundation import AuthenticationServices import FirebaseAuth import CommonCrypto enum FirebaseAuthenticationNotification: String { case signOutSuccess case signOutError case signInSuccess case signInError var notificationName: NSNotification.Name { return NSNotification.Name(rawValue: self.rawValue) } } class FirebaseAuthentication: NSObject { static let shared = FirebaseAuthentication() var window: UIWindow? fileprivate var currentNonce: String? private override init() {} func signInWithApple(window: UIWindow) { self.window = window let nonce = randomNonceString() currentNonce = nonce let appleIDProvider = ASAuthorizationAppleIDProvider() let request = appleIDProvider.createRequest() request.requestedScopes = [.fullName, .email] request.nonce = sha256(nonce) let authorizationController = ASAuthorizationController(authorizationRequests: [request]) authorizationController.delegate = self authorizationController.presentationContextProvider = self authorizationController.performRequests() } func signInWithAnonymous() { Auth.auth().signInAnonymously() { [weak self] (authResult, error) in if error != nil { self?.postNotificationSignInError() return } self?.postNotificationSignInSuccess() } } func signOut() { let firebaseAuth = Auth.auth() do { try firebaseAuth.signOut() postNotificationSignOutSuccess() } catch let error { postNotificationSignOutError() } } } extension FirebaseAuthentication: ASAuthorizationControllerDelegate { func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) { if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential { guard let nonce = currentNonce else { fatalError("Invalid state: A login callback was received, but no login request was sent.") } guard let appleIDToken = appleIDCredential.identityToken else { print("Unable to fetch identity token") return } guard let idTokenString = String(data: appleIDToken, encoding: .utf8) else { print("Unable to serialize token string from data: \(appleIDToken.debugDescription)") return } // Initialize a Firebase credential. let credential = OAuthProvider.credential(withProviderID: "apple.com", idToken: idTokenString, rawNonce: nonce) // Sign in with Firebase. Auth.auth().signIn(with: credential) { [weak self] (authResult, error) in if (error != nil) { self?.postNotificationSignInError() return } self?.postNotificationSignInSuccess() } } } func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) { // Handle error. print("Sign in with Apple errored: \(error)") } } extension FirebaseAuthentication: ASAuthorizationControllerPresentationContextProviding { func presentationAnchor(for controller: ASAuthorizationController) -> ASPresentationAnchor { return window ?? UIWindow() } } extension FirebaseAuthentication { private func randomNonceString(length: Int = 32) -> String { precondition(length > 0) let charset: Array<Character> = Array("0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz-._") var result = "" var remainingLength = length while remainingLength > 0 { let randoms: [UInt8] = (0 ..< 16).map { _ in var random: UInt8 = 0 let errorCode = SecRandomCopyBytes(kSecRandomDefault, 1, &random) if errorCode != errSecSuccess { fatalError("Unable to generate nonce. SecRandomCopyBytes failed with OSStatus \(errorCode)") } return random } randoms.forEach { random in if length == 0 { return } if random < charset.count { result.append(charset[Int(random)]) remainingLength -= 1 } } } return result } private func sha256(_ input: String) -> String { let inputData = Data(input.utf8) let hashedData = hashSHA256(data: inputData) let hashString = hashedData!.compactMap { return String(format: "%02x", $0) }.joined() return hashString } private func hashSHA256(data:Data) -> Data? { var hashData = Data(count: Int(CC_SHA256_DIGEST_LENGTH)) _ = hashData.withUnsafeMutableBytes {digestBytes in data.withUnsafeBytes {messageBytes in CC_SHA256(messageBytes, CC_LONG(data.count), digestBytes) } } return hashData } private func postNotificationSignInSuccess() { NotificationCenter.default.post(name: FirebaseAuthenticationNotification.signInSuccess.notificationName, object: nil) } private func postNotificationSignInError() { NotificationCenter.default.post(name: FirebaseAuthenticationNotification.signInError.notificationName, object: nil) } private func postNotificationSignOutSuccess() { NotificationCenter.default.post(name: FirebaseAuthenticationNotification.signOutSuccess.notificationName, object: nil) } private func postNotificationSignOutError() { NotificationCenter.default.post(name: FirebaseAuthenticationNotification.signOutError.notificationName, object: nil) } }