path: root/contrib/wallet-rekey-periodic.8

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.\"
.IX Title "WALLET-REKEY-PERIODIC 8"
.TH WALLET-REKEY-PERIODIC 8 "2014-12-08" "1.2" "wallet"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
wallet\-rekey\-periodic \- Periodically rekey all system keytabs
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBwallet-rekey-periodic\fR [\fIkeytab\fR ...]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBwallet-rekey-periodic\fR is a wrapper around wallet-rekey that adds some
additional functionality: rekeying of all keytabs at known locations on
the system, skipping keytabs that are marked unchanging, rekeying any
keytabs with \s-1DES\s0 keys immediately but otherwise only rekeying once a month
based on a random interval based on the hostname, and cleaning up old
keys.
.PP
It's primarily meant to be run daily from cron, but can also be run
manually from the command line to rekey specific keytab files.
.PP
\&\fBwallet-rekey-periodic\fR will, for each keytab, find a list of all
principals in that keytab and see if any of them still have \s-1DES\s0 keys.  If
so, it will always attempt to rekey that keytab.  If not, it will only do
so, for a given system, once every 30 days (based on a hash of the
hostname).  It will also always skip keytabs that contain any principals
that wallet says are unchanging, since otherwise the current wallet-rekey
implementation will duplicate the existing keys.
.PP
On Heimdal systems, this command will remove keys older than a week before
rekeying the keytab.  This relies on \fBktutil\fR functionality that's
available only in Heimdal, so \s-1MIT\s0 Kerberos keytabs will slowly grow unless
they're manually pruned.  This will be fixed in a later release of
\&\fBwallet-rekey\fR.
.PP
If no keytabs are given on the command line, \fBwallet-rekey-periodic\fR will
rekey a set of system keytabs described below under \*(L"\s-1FILES\*(R"\s0.  Otherwise,
it will rekey the keytabs given.
.SH "FILES"
.IX Header "FILES"
.IP "\fI/etc/keytabs/*\fR" 4
.IX Item "/etc/keytabs/*"
.PD 0
.IP "\fI/etc/krb5.keytab\fR" 4
.IX Item "/etc/krb5.keytab"
.IP "\fI/etc/webauth/keytab\fR" 4
.IX Item "/etc/webauth/keytab"
.PD
The default list of locations checked for rekeyable keytabs.  If run with
no command-line arguments, \fBwallet-rekey-periodic\fR will try to rekey
every principal in each keytab found at any of these paths.
.SH "AUTHOR"
.IX Header "AUTHOR"
Russ Allbery <eagle@eyrie.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright 2013, 2014 The Board of Trustees of the Leland Stanford Junior
University
.PP
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the \*(L"Software\*(R"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
.PP
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
.PP
\&\s-1THE SOFTWARE IS PROVIDED \*(L"AS IS\*(R", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIktutil\fR\|(8), \fIwallet\fR\|(1), \fIwallet\-rekey\fR\|(1)