07-31-2012
So it needs to continuously monitor a growing file?
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LEARN ABOUT FREEBSD
rndtest
RNDTEST(4) BSD Kernel Interfaces Manual RNDTEST(4)
NAME
rndtest -- FIPS 140-2 random number generator test monitor
SYNOPSIS
device rndtest
DESCRIPTION
The rndtest driver ``hooks up'' to hardware crypto devices to monitor the entropy data passed to the random(4) subsystem. This data is peri-
odically 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.
SEE ALSO
crypto(4), hifn(4), random(4), safe(4), ubsec(4), crypto(9)
HISTORY
The idea for this and the original code came from Jason L. Wright. The rndtest device driver first appeared in FreeBSD 5.0.
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 random(4) subsystem where it can be applied to devices that claim to supply ``pure entropy''.
BSD
March 11, 2003 BSD