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.IX Title "SHIB-SECKEYGEN.8 8"
.TH SHIB-SECKEYGEN.8 8 "2019-04-01" "3.0.4" "Shibboleth"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
shib\-seckeygen \- Rotate the keys of a Versioned DataSealer
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBshib-seckeygen\fR [\fB\-o\fR \fIoutput-dir\fR] [\fB\-f\fR \fIfilename\fR]
    [\fB\-h\fR \fIhistory-length\fR] [\fB\-b\fR \fIkey-size\fR]
    [\fB\-u\fR \fIuser\fR] [\fB\-g\fR \fIgroup\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fIVersioned\fR <DataSealer> type is designed for production use and
obtains its key material from a simple flat file that allows a history
of several keys to be kept to decrypt older data and continuously
rotate the encryption key on a regular basis, usually daily.
.PP
The flat file format consists of lines of the form <name>:<key>, where
the name is typically a number for record keeping but can be any
label, and the key is base64\-encoded. The key length dictates which
AES-GCM algorithm is used, among the supported key sizes
(128,192,256). The \*(L"default\*(R" key used for new operations is the last
line in the file.
.PP
This script provides a simple means of rotating the key, and the
Service Provider software will typically detect when the file changes
and reload it.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-b\fR \fIkey-size\fR" 4
.IX Item "-b key-size"
Number of random bits in the newly generated key.  See above for the
supported sizes.  The default is 128.
.IP "\fB\-g\fR \fIgroup\fR" 4
.IX Item "-g group"
Change the group ownership of the key file to this group.  The default
is \f(CW\*(C`_shibd\*(C'\fR.
.IP "\fB\-h\fR \fIhistory-length\fR" 4
.IX Item "-h history-length"
The maximum number of keys to keep in the file.  The default is 14.
.IP "\fB\-f\fR \fIfilename\fR" 4
.IX Item "-f filename"
The name of the file containing the keys in \fIoutput-dir\fR.  The
default is \f(CW\*(C`sealer.keys\*(C'\fR.
.IP "\fB\-o\fR \fIoutput-dir\fR" 4
.IX Item "-o output-dir"
The key file and a temporary key file are created in this directory.
The default is \f(CW\*(C`/etc/shibboleth\*(C'\fR.
.IP "\fB\-u\fR \fIuser\fR" 4
.IX Item "-u user"
Change the ownership of the key file to this user.  The default is
\&\f(CW\*(C`_shibd\*(C'\fR.
.SH "FILES"
.IX Header "FILES"
.IP "\fI/etc/shibboleth/sealer.keys\fR" 4
.IX Item "/etc/shibboleth/sealer.keys"
The default key file rotated by this script.
.SH "AUTHOR"
.IX Header "AUTHOR"
This manual page was written by Ferenc Wágner for Debian GNU/Linux
using the text on
https://wiki.shibboleth.net/confluence/display/SP3/VersionedDataSealer.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018 Shibboleth Project.  License: Creative Commons
Attribution-ShareAlike 3.0.