.\"-
.\" Copyright (c) 2003 Sam Leffler, Errno Consulting
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.\" $FreeBSD: src/share/man/man4/rndtest.4,v 1.2.4.1 2003/06/04 17:10:30 sam Exp $
.\"
.Dd March 11, 2003
.Dt RNDTEST 4
.Os
.Sh NAME
.Nm rndtest
.Nd FIPS 140-2 random number generator test monitor
.Sh SYNOPSIS
.Cd device rndtest
.Sh DESCRIPTION
The
.Nm
driver ``hooks up'' to hardware crypto devices to monitor the
entropy data passed to the
.Xr random 4
subsystem.
This data is periodically tested for FIPS 140-2 compliance and
statistics are collected.
If the harvested entropy fails any of the FIPS test suite, then
it is discarded and testing is continuously applied until ``good data''
is received from the device.
Failures are optionally reported on the console.
.Sh SEE ALSO
.Xr crypto 4 ,
.Xr hifn 4 ,
.Xr random 4 ,
.Xr safe 4 ,
.Xr ubsec 4 ,
.Xr crypto 9
.Sh HISTORY
The idea for this and the original code came from Jason L. Wright.
The
.Nm
device driver first appeared in
.Fx 5.0 .
.Sh BUGS
Crypto device drivers must be compiled specially to make use of this driver;
this should not be necessary.
This feature might better be integrated into the
.Xr random 4
subsystem where it can be used applied to devices that claim to supply
``pure entropy''.