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fido(4) and umstc(4) also attach to uhidev(4).

.\" $OpenBSD: fido.4,v 1.4 2020/08/21 19:02:46 mglocker Exp $
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.\" Copyright (c) 2019 Reyk Floeter <reyk@openbsd.org>
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.Dd $Mdocdate: August 21 2020 $
.Dt FIDO 4
.Os
.Sh NAME
.Nm fido
.Nd FIDO/U2F security keys
.Sh SYNOPSIS
.Cd "fido* at uhidev?"
.Sh DESCRIPTION
The
.Nm
driver provides support for FIDO/U2F-compatible USB security keys.
They are Human Interface Devices (HID) which can be accessed via the
.Pa /dev/fido/N
interface.
.Pp
The driver is compatible with the
.Xr read 2 ,
.Xr write 2 ,
and
.Xr ioctl 2
operations of the generic
.Xr uhid 4
device but only accepts the optional HID
.Xr ioctl 2
calls from root.
.Sh FILES
.Bl -tag -width /dev/fido/* -compact
.It Pa /dev/fido/*
.El
.Sh SEE ALSO
.Xr uhid 4 ,
.Xr uhidev 4 ,
.Xr usb 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 6.7 .