1.\" $OpenBSD: fido.4,v 1.4 2020/08/21 19:02:46 mglocker Exp $ 2.\" 3.\" Copyright (c) 2019 Reyk Floeter <reyk@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: August 21 2020 $ 18.Dt FIDO 4 19.Os 20.Sh NAME 21.Nm fido 22.Nd FIDO/U2F security keys 23.Sh SYNOPSIS 24.Cd "fido* at uhidev?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for FIDO/U2F-compatible USB security keys. 29They are Human Interface Devices (HID) which can be accessed via the 30.Pa /dev/fido/N 31interface. 32.Pp 33The driver is compatible with the 34.Xr read 2 , 35.Xr write 2 , 36and 37.Xr ioctl 2 38operations of the generic 39.Xr uhid 4 40device but only accepts the optional HID 41.Xr ioctl 2 42calls from root. 43.Sh FILES 44.Bl -tag -width /dev/fido/* -compact 45.It Pa /dev/fido/* 46.El 47.Sh SEE ALSO 48.Xr uhid 4 , 49.Xr uhidev 4 , 50.Xr usb 4 51.Sh HISTORY 52The 53.Nm 54driver first appeared in 55.Ox 6.7 . 56