The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords, public-key cryptography, and authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols[1] developed by the FIDO Alliance. It allows users to securely log into their accounts by emitting one-time passwords or using a FIDO-based public/private key pair generated by the device.
The YubiKey itself should work out of the box.
Tested:
| Website | Firefox (< 90.0.1) | Chromium |
|---|---|---|
| fastmail.com 2FA | working | working |
| demo.yubico.com/webauthn-technical/registration | working | working |
| GitLab | working | working |
| … |
It’s best to follow these steps as a root, to avoid issues with device recognition after switching modes:
su - root
Install the Yubikey manager:
$ guix package -i python-yubikey-manager
Verify your device is recognized:
$ ykman list
YubiKey 5 Nano [FIDO] Serial: 109*****
Determine current connection mode:
$ ykman mode
Current connection mode is: FIDO
Supported USB interfaces are: OTP, FIDO, CCID
# for more information
$ ykman info
Device type: YubiKey 5 Nano
Serial number: 109*****
Firmware version: 5.2.4
Form factor: Nano (USB-A)
Enabled USB interfaces: FIDO
Applications
OTP Disabled
FIDO U2F Enabled
OpenPGP Disabled
PIV Disabled
OATH Disabled
FIDO2 Enabled
Switch to OTP
$ ykman mode otp
Set mode of YubiKey to OTP? [y/N]: y
When you touch your YubiKey now, you should get a OTP input (cccccdligrgcdtoqkjsnahtnhfvbhicjbgasdiujesc), to whatever field is selected. Depending on whether you’re using Slot 1 or 2, this happens immideately, or after a 3 seconds delay.
To switch back to FIDO
ykman mode FIDO
Set mode of YubiKey to FIDO? [y/N]: y
Unless not supported, it’s best to stick to FIDO U2F for ease and security.
$ su - root # login as root
$ dmesg|grep Yubi
[ 997.077641] usb 1-4: Product: YubiKey FIDO
[ 997.077642] usb 1-4: Manufacturer: Yubico
[ 997.079001] hid-generic 0003:1050:0402.0006: hiddev0,hidraw3: USB HID v1.10 Device [Yubico YubiKey FIDO] on usb-0000:00:14.0-4/input0
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