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FIDO(4) Device Drivers Manual FIDO(4)

fidoFIDO/U2F security keys

fido* at uhidev?

The fido driver provides support for FIDO/U2F-compatible USB security keys. They are Human Interface Devices (HID) which can be accessed via the /dev/fido/N interface.

The driver is compatible with the read(2), write(2), and ioctl(2) operations of the generic uhid(4) device but only accepts the optional HID ioctl(2) calls from root.


uhid(4), uhidev(4), usb(4)

The fido driver first appeared in OpenBSD 6.7.

August 21, 2020 OpenBSD-7.3