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U2F(4) Kernel Interfaces Manual U2F(4) NAME u2f -- FIDO/U2F USB security keys SYNOPSIS device u2f In loader.conf(5): u2f_load="YES" In sysctl.conf(5): hw.hid.u2f.debug DESCRIPTION The u2f driver provides support for FIDO/U2F-compatible USB security keys. They are Human Interface Devices (HID) which can be accessed via the /dev/u2f/N interface. The driver is compatible with the read(2), write(2), and ioctl(2) oper- ations of the generic uhid(4) device but only accepts the optional HID ioctl(2) calls from u2f group users. HARDWARE The u2f driver supports FIDO/U2F-compatible USB security keys. SYSCTL VARIABLES The following variables are available as both sysctl(8) variables and loader(8) tunables: hw.hid.u2f.debug Debug output level, where 0 is debugging disabled and larger values increase debug message verbosity. Default is 0. FILES /dev/u2f/* SEE ALSO uhid(4), usbhid(4), usb(4) HISTORY The u2f driver first appeared in FreeBSD 15.0. AUTHORS The u2f driver was written by Vladimir Kondratyev <wulf@FreeBSD.org>. This manual page was written by Vladimir Kondratyev <wulf@FreeBSD.org> based on the OpenBSD fido(4) manual page. FreeBSD 15.0 August 21, 2023 U2F(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | SYSCTL VARIABLES | FILES | SEE ALSO | HISTORY | AUTHORS
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