<class 'OverflowError'>exception during authentication

[YashwanthLokam]

Hi, I am getting this exception argument 1: <class 'OverflowError'>: int too long to convert when I am trying to check if key is available or not. This error pops up mostly in VM ware. Error occurs at next(CtapHidDevice.list_devices(), None) function.

[PranithaReddyAedla]

@dainnilsson Could we get any update here please?

[dainnilsson]

Please provide more information. Full traceback, Operating system, authenticator device type, etc.

[PranithaReddyAedla]

@dainnilsson

1. We dont have stack trace, we have just got mentioned message (<class 'OverflowError'>: int too long to convert) and sometimes "Wrong nonce" while checking if security key if connected to machine using next(CtapHidDevice.list_devices(), None) function.
2. OS: Windows 10/11
3. Authenticator Device type : Yubikey 5 NFC and Yubikey 4 NFC.
4. python-fido2 version : v0.9.3
   We are using same logic and version from quiet some time but never faced any issue. Since past 1 or 2 months we are receiving these kind of errors from users.

[dainnilsson]

Without a stack trace it's hard to say anything definitive. The fact that you're getting the wrong nonce and that this happens when connecting to the device indicates that there might be a problem with multiple threads/processes trying to use the YubiKey concurrently. If you have more concrete steps that reproduce this issue I might be able to help more.

[YashwanthLokam]

@dainnilsson
I am sharing you a screenshot where I found the issue thrown as an Exception.