This document describes the symmetric key file for the NTP Project's
This document applies to version 4.2.8p4 of
The name and location of the symmetric key file for
be specified in a configuration file, by default
This document describes the format of an NTP symmetric key file.
For a description of the use of this type of file, see the
section of the
reads its keys from a file specified using the
command line option or the
statement in the configuration file.
While key number 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 arbitrarily 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.
may be given in a format
controlled by the
is always supported.
was built with the OpenSSL library
then any digest library supported by that library may be specified.
However, if compliance with FIPS 140-2 is required the
must be either
What follows are some key types, and corresponding formats:
#(which is the "start of comment" character).
Note that the keys used by the
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.
This section was generated by AutoGen,
agtexi-cmd template and the option descriptions for the
This software is released under the NTP license, <http://ntp.org/license>.
This document was derived from FreeBSD.