Phone Auth not working above iOS 16

[KunalxBhandari]

Description

I'm using the latest firebase version 11.0.0 and on iOS 16 and above, I'm unable to login using PhoneAuthProvider. I'm getting the below error message:

Error Domain=FIRAuthErrorDomain Code=17048 "Token mismatch" UserInfo={FIRAuthErrorUserInfoNameKey=INVALID_APP_CREDENTIAL, NSLocalizedDescription=Token mismatch}

Although it's working fine on 10.29.0 version.

Reproducing the issue

PhoneAuthProvider.provider().verifyPhoneNumber("+911234567899", uiDelegate: nil) { [weak self] (verificationID , error) in
if let error = error {
print(error)
let authErr = error as NSError
let alert = UIAlertController(title: "Something went wrong. Please try again later", message: nil, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))
self?.present(alert, animated: true, completion: nil)
} else {
//Successful
}
}

Firebase SDK Version

11.0.0

Xcode Version

15.4

Installation Method

CocoaPods

Firebase Product(s)

Authentication

Targeted Platforms

iOS

Relevant Log Output

Error Domain=FIRAuthErrorDomain Code=17048 "Token mismatch" UserInfo={FIRAuthErrorUserInfoNameKey=INVALID_APP_CREDENTIAL, NSLocalizedDescription=Token mismatch}

If using Swift Package Manager, the project's Package.resolved

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Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

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[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[ncooke3]

Hi @KunalxBhandari, I wasn't able to reproduce this in v11. I tried Xcode 15 and Xcode 16 and used a device running iOS 17. When PhoneAuthProvider.provider().verifyPhoneNumber(...) is called, what behavior do you see? Does anything happen (e.g. recaptcha window appear, etc.) before the callback is called with the error?

cc: @jordanebelanger

[ncooke3]

If the issue can be easily reproduced, it would be helpful to know where the error is being thrown as there are a few places within the phone provider logic where it could occur.

To debug, enable Swift error breakpoints, run the app, and perform the behavior that makes the error appear. Execution may pause on a few false positives, but what we are looking for are any breakpoints that pause execution in the PhoneAuthProvider.swift file.

Knowing where those pauses occur would help narrow things down.

[alexandersandberg]

Possibly related:

Since Aug 8th, we've started seeing occasional INVALID_APP_CREDENTIAL errors for the google.cloud.identitytoolkit.v2.AuthenticationService.StartMfaSignIn method.

However, we're on Firebase iOS SDK version 10.24.0 since a while back. We have not made any recent changes on our side that could have caused this.

[deirinberg]

@ncooke3 we're having the same token mismatch as well. It's reproducible for us across multiple devices on 11.0. Everything was working great for us on 10.29 and earlier

I added a Swift Breakpoint Error and see that the verifyClient func in PhoneAuthProvider is failing. I get the following error message: Error Domain=FIRAuthErrorDomain Code=17048 "Token mismatch" UserInfo={NSLocalizedDescription=Token mismatch, FIRAuthErrorUserInfoNameKey=INVALID_APP_CREDENTIAL}

Not sure if this is relevant but the breakpoint was firing on the AuthBackendRPCImplementation callInternal func

[ncooke3]

Thanks, @deirinberg. Question, does the Recaptcha UI flow get presented at all during the process?