.\" $OpenBSD: fido.4,v 1.2 2019/12/17 18:14:32 jmc Exp $
.\"
.\" Copyright (c) 2019 Reyk Floeter <reyk@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: December 17 2019 $
.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 accept 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 usb 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 6.7 .