在 iOS 13 上的 Swift 中使用 Apple for Firebase 设置登录时出错的原因是啥？

Posted 2023-03-10

【中文标题】在 iOS 13 上的 Swift 中使用 Apple for Firebase 设置登录时出错的原因是啥？

【英文标题】：Cause of error setting up Sign in with Apple for Firebase in Swift on iOS 13?在 iOS 13 上的 Swift 中使用 Apple for Firebase 设置登录时出错的原因是什么？

【发布时间】：2020-03-19 12:48:29

【问题描述】：

我一直在关注https://firebase.google.com/docs/auth/ios/apple，它确实提到了我收到的错误“将 SHA256 哈希随机数作为十六进制字符串发送”，但它没有提供任何帮助来解决它，而且我的搜索没有给出我有一个可行的解决方案。

我的视图控制器代码提取是

        fileprivate var currentNonce: String?

        @objc @available(iOS 13, *)
        func startSignInWithAppleFlow() 
          let nonce = randomNonceString()
          currentNonce = nonce
          let appleIDProvider = ASAuthorizationAppleIDProvider()
          let request = appleIDProvider.createRequest()
          request.requestedScopes = [.fullName, .email]
          request.nonce = sha256(nonce)
            print(request.nonce)

          let authorizationController = ASAuthorizationController(authorizationRequests: [request])
          authorizationController.delegate = self
          authorizationController.presentationContextProvider = self
          authorizationController.performRequests()
        
        @available(iOS 13, *)
        private func sha256(_ input: String) -> String 
          let inputData = Data(input.utf8)
          let hashedData = SHA256.hash(data: inputData)
          let hashString = hashedData.compactMap 
            return String(format: "%02x", $0)
          .joined()
            print(hashString)
          return hashString
        
    
    @available(iOS 13.0, *)
    extension LoginViewController: 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.
            print(nonce)
            let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

            print(credential)
          // Sign in with Firebase.
          Auth.auth().signInAndRetrieveData(with: credential)  (authResult, error) in
            if (error != nil) 
              // Error. If error.code == .MissingOrInvalidNonce, make sure
              // you're sending the SHA256-hashed nonce as a hex string with
              // your request to Apple.
                print(authResult)
                print(error!)
                print(error!.localizedDescription)
              return
            
            // User is signed in to Firebase with Apple.
            // ...
          
        
      

此部分与网页上的说明不同，因为 Xcode 出错了

    let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

如果我在之前打印随机数

    let credential = OAuthProvider.credential(withProviderID: "apple.com",
                                                      idToken: idTokenString,
                                                      accessToken: nonce)

我得到 2eNjrtagc024_pd3wfnt_PZ0N89GZ_b6_QJ3IZ_

response.nonce 值为 cd402f047012a2d5c129382c56ef121b53a679c0a5c5e37433bcde2967225afe

显然这些不一样，但我似乎无法弄清楚我做错了什么。

完整的错误输出是

Error Domain=FIRAuthErrorDomain Code=17999 "An internal error has occurred, print and inspect the error details for more information." UserInfo=NSUnderlyingError=0x60000388a820 Error Domain=FIRAuthInternalErrorDomain Code=3 "(null)" UserInfo=FIRAuthErrorUserInfoDeserializedResponseKey=
    code = 400;
    errors =     (
                
            domain = global;
            message = "MISSING_OR_INVALID_NONCE : Nonce is missing in the request.";
            reason = invalid;
        
    );
    message = "MISSING_OR_INVALID_NONCE : Nonce is missing in the request.";
, FIRAuthErrorUserInfoNameKey=ERROR_INTERNAL_ERROR, error_name=ERROR_INTERNAL_ERROR, NSLocalizedDescription=An internal error has occurred, print and inspect the error details for more information.
An internal error has occurred, print and inspect the error details for more information.

【参考方案1】：

我遇到了同样的错误。

解决方案： 跑吧

pod update

解释：

问题正如@ethanrj 所说。文档说要做

let credential = OAuthProvider.credential( 
    withProviderID: "apple.com", IDToken: appleIdToken, rawNonce: rawNonce )

但这会产生错误，Xcode 会提示以下内容（rawNonce -> accessToken）：

let credential = OAuthProvider.credential( 
    withProviderID: "apple.com", IDToken: appleIdToken, accessToken: rawNonce )

这是因为pod install 将默认安装 FirebaseAuth 6.12，当您真正需要 6.13 时，因为新功能签名仅在那里可用。可以查看源码here。

【讨论】：

非常感谢，解决了，我自己也应该想到的！最终结果 let credential = OAuthProvider.credential(withProviderID: "apple.com", idToken: idTokenString, rawNonce: nonce, accessToken: nil)

【参考方案2】：

您是否可能使用了错误的凭据方法？在documentation 上，看起来采用随机数的是：

 let credential = OAuthProvider.credential( withProviderID: "apple.com", IDToken: appleIdToken, rawNonce: rawNonce )

但是你在这里使用的那个需要一个访问令牌，不确定这是否有帮助。

【讨论】：

谢谢，但我试过了，Xcode 给出了一个红色错误并说将 rawNonce 更改为 idToken，我还检查了 pod 文件，并且在任何项目文件中从未提及 rawNonce，格式最接近的方法是我正在使用的一个。