ntp.keys(5) File Formats ntp.keys(5)NAMEntp.keys - NTP symmetric key file format configuration file
SYNOPSIS
/etc/ntp.keys
DESCRIPTION
This document describes the format of an NTP symmetric key file. For a
description of the use of this type of file, see the "Authentication
Support" section of the ntp.conf(5) page.
ntpd(8) reads its keys from a file specified using the -k command line
option or the keys statement in the configuration file. While key num‐
ber 0 is fixed by the NTP standard (as 56 zero bits) and may not be
changed, one or more keys numbered between 1 and 65534 may be arbitrar‐
ily set in the keys file.
The key file uses the same comment conventions as the configuration
file. Key entries use a fixed format of the form
keyno type key
where keyno is a positive integer (between 1 and 65534), type is the
message digest algorithm, and key is the key itself.
The key may be given in a format controlled by the type field. The
type MD5 is always supported. If ntpd was built with the OpenSSL
library then any digest library supported by that library may be speci‐
fied. However, if compliance with FIPS 140-2 is required the type must
be either SHA or SHA1.
What follows are some key types, and corresponding formats:
MD5 The key is 1 to 16 printable characters terminated by an EOL,
whitespace, or a # (which is the "start of comment" character).
SHA
SHA1
RMD160 The key is a hex-encoded ASCII string of 40 characters, which is
truncated as necessary.
Note that the keys used by the ntpq(8) and ntpdc(8) programs are
checked against passwords requested by the programs and entered by
hand, so it is generally appropriate to specify these keys in ASCII
format. cvt_prog='/usr/local/gnu/share/autogen/texi2man' cvt_prog=`cd
`dirname "$cvt_prog"` >/dev/null && pwd
`/`basename "$cvt_prog"` cd $tmp_dir test -x "$cvt_prog" ||
die "'$cvt_prog' is not executable" {
list='synopsis description options option-presets'
for f in $list ; do cat $f ; echo ; done
rm -f $list name
list='implementation-notes environment files examples exit-status
errors
compatibility see-also conforming-to history authors copyright
bugs
notes'
for f in $list ; do cat $f ; echo ; done > .end-doc
rm -f $list
list=`ls -1 *`' .end-doc'
for f in $list ; do cat $f ; echo ; done
rm -f $list } 1>.doc 2>/dev/null sed -f .cmds .doc |
/opt/csw/bin/ggrep -E -v '^[ ]*$' | $cvt_prog
FILES
/etc/ntp.keys the default name of the configuration file
SEE ALSOntp.conf(5), ntpd(8), ntpdate(8), ntpdc(8), sntp(1)AUTHORS
The University of Delaware
COPYRIGHT
Copyright (C) 1970-2013 The University of Delaware all rights reserved.
This program is released under the terms of the NTP license,
<http://ntp.org/license>.
BUGS
Please send bug reports to: http://bugs.ntp.org, bugs@ntp.org
NOTES
This document corresponds to version 4.2.7p410 of NTP. This document
was derived from FreeBSD.
This manual page was AutoGen-erated from the ntp.keys option defini‐
tions.
4.2.7p410 08 Jan 2014 ntp.keys(5)
