Phone Passkey on PC requirements

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My1

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Jan 9, 2023, 3:46:42 PM1/9/23
to FIDO Dev (fido-dev)
Are there any specific requirements for Passkeys on PC?

I mean iirc you only need a chrome-based browser and Bluetooth on the PC side, and obviously a passkey-compatible phone, right?

because interestingly on one of my 2 PCs it does work.

The one where it does work has a BT adapter from UGREEN which iirc does not support BT5, and the one where it doesnt work is listed as Integrated System Solution Corp. KY-BT100 Bluetooth Adapter, which I heavily doubt supports BT5 either.

The Browser and OS are likely not the issue as I run Brave and Kubuntu 22.04 on both of them currently.

Regards
My1

Tim Cappalli

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Jan 9, 2023, 4:02:14 PM1/9/23
to My1, FIDO Dev (fido-dev)
My1,

Sounds like you're asking specifically about using a passkey with Cross-Device Authentication?

Can you expand on "doesn't work"? What error are you seeing? Do you ever receive the prompt on the authenticator after scanning the QR? 

Also, output from the device log would be helpful.

Thanks

From: fido...@fidoalliance.org <fido...@fidoalliance.org> on behalf of My1 <teamhyd...@gmail.com>
Sent: Monday, January 9, 2023 15:46
To: FIDO Dev (fido-dev) <fido...@fidoalliance.org>
Subject: [FIDO-DEV] Phone Passkey on PC requirements
 
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My1

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Jan 9, 2023, 4:34:26 PM1/9/23
to Tim Cappalli, FIDO Dev (fido-dev)
yup that's what I mean.
after scanning the QR I get asked to confirm if I wanna connect and then, well it tries to connect but on one site, the WebAuthn just times out before establishing the connection, and using my handy sandbox which has a higher timeout, the phone says "connection to computer not possible. try another verification method" after circling around the loading icon for a good while.

btw the Phone I use is an xcover pro with Android 13 so that's modern.

there's a log for the FIDO stuff on the phone? Where can I get that?

Regards

Tim Cappalli

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Jan 9, 2023, 6:14:58 PM1/9/23
to My1, FIDO Dev (fido-dev)
The logs will be on the CDA client side (browser in this case):

edge://device-log
chrome://device-log

Make sure FIDO is checked.

From: My1 <teamhyd...@gmail.com>
Sent: Monday, January 9, 2023 16:34
To: Tim Cappalli <Tim.Ca...@microsoft.com>
Cc: FIDO Dev (fido-dev) <fido...@fidoalliance.org>
Subject: Re: [FIDO-DEV] Phone Passkey on PC requirements
 

My1

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Jan 9, 2023, 6:54:00 PM1/9/23
to Tim Cappalli, FIDO Dev (fido-dev)
Looks like this. I did censor part of the BT address tho.
Seems like something errors in a weird way.
image.png
^- image of the log.
Regards

Adam Langley

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Jan 10, 2023, 11:49:01 AM1/10/23
to FIDO Dev (fido-dev), My1, FIDO Dev (fido-dev), Tim Cappalli
On Monday, January 9, 2023 at 3:54:00 PM UTC-8 My1 wrote:
Looks like this. I did censor part of the BT address tho.
Seems like something errors in a weird way.
image.png

This is a Linux machine?

Failing to start the LE scan because it's already running seems like a Chromium issue. Can you run `bluetoothctl` in a terminal and do `scan off` and see if that fixes it? If so, then this sounds like a Chromium bug that we're not ignoring this specific error from bluez.


Cheers

AGL

My1

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Jan 21, 2023, 5:04:54 PM1/21/23
to Adam Langley, FIDO Dev (fido-dev), Tim Cappalli
doesnt seem to fix it. in fact trying to set scan off results in an error itself.

Failed to stop discovery: org.bluez.Error.Failed

the only thing that really seems different on the 2 PCs is as mentioned the BT stick I am using, maybe the "KY-BT100" (at least that's what lsusb calls it) has some issues with BT fido, I dont know.

Regards
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