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102 lines
3.5 KiB
Groff
102 lines
3.5 KiB
Groff
.\" A man page for ipa-getkeytab
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.\" Copyright (C) 2007 Red Hat, Inc.
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.\"
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.\" This is free software; you can redistribute it and/or modify it under
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.\" the terms of the GNU Library General Public License as published by
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.\" the Free Software Foundation; version 2 only
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.\"
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.\" This program is distributed in the hope that it will be useful, but
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.\" WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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.\" General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU Library General Public
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.\" License along with this program; if not, write to the Free Software
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.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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.\"
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.\" Author: Karl MacMillan <kmacmill@redhat.com>
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.\" Author: Simo Sorce <ssorce@redhat.com>
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.\"
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.TH "ipa-getkeytab" "1" "Oct 10 2007" "freeipa" ""
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.SH "NAME"
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ipa\-getkeytab \- Get a keytab for a kerberos principal
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.SH "SYNOPSIS"
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ipa\-getkeytab [ \fB\-s\fR ipaserver ] [ \fB\-p\fR principal\-name ] [ \fB\-k\fR keytab\-file ] [ \fB\-e\fR encryption\-types ] [ \fB\-q\fR ]
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.SH "DESCRIPTION"
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Retrieves a kerberos \fIkeytab\fR.
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Kerberos keytabs are used for services (like sshd) to
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perform kerberos authentication. A keytab is a file
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with one or more secrets (or keys) for a kerberos
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principal.
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A kerberos service principal is a kerberos identity
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that can be used for authentication. Service principals
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contain the name of the service, the hostname of the
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server, and the realm name. For example, the following
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is an example principal for an ldap server:
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ldap/foo.example.com@EXAMPLE.COM
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When using ipa\-getkeytab the realm name is already
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provided, so the principal name is just the service
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name and hostname (ldap/foo.example.com from the
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example above).
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\fBWARNING:\fR retrieving the keytab resets the secret for the Kerberos principal.
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This renders all other keytabs for that principal invalid.
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.SH "OPTIONS"
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.TP
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\fB\-s ipaserver\fR
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The IPA server to retrieve the keytab from (FQDN).
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.TP
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\fB\-p principal\-name\fR
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The non\-realm part of the full principal name.
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.TP
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\fB\-k keytab\-file\fR
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The keytab file where to append the new key (will be
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created if it does not exist).
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.TP
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\fB\-e encryption\-types\fR
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The list of encryption types to use to generate keys.
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ipa\-getkeytab will use local client defaults if not provided.
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Valid values depend on the kerberos library version and configuration.
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Common values are:
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aes256\-cts
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aes128\-cts
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des3\-hmac\-sha1
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arcfour\-hmac
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des\-hmac\-sha1
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des\-cbc\-md5
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des\-cbc\-crc
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.TP
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\fB\-q\fR
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Quiet mode. Only errors are displayed.
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.TP
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\fB\-\-permitted\-enctypes\fR
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This options returns a description of the permitted encryption types, like this:
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Supported encryption types:
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AES\-256 CTS mode with 96\-bit SHA\-1 HMAC
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AES\-128 CTS mode with 96\-bit SHA\-1 HMAC
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Triple DES cbc mode with HMAC/sha1
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ArcFour with HMAC/md5
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DES cbc mode with CRC\-32
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DES cbc mode with RSA\-MD5
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DES cbc mode with RSA\-MD4
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.SH "EXAMPLES"
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Add and retrieve a keytab for the NFS service principal on
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the host foo.example.com and save it in the file /tmp/nfs.keytab and retrieve just the des\-cbc\-crc key.
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# ipa\-getkeytab \-s ipaserver.example.com \-p nfs/foo.example.com \-k /tmp/nfs.keytab \-e des\-cbc\-crc
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Add and retrieve a keytab for the ldap service principal on
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the host foo.example.com and save it in the file /tmp/ldap.keytab.
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# ipa\-getkeytab \-s ipaserver.example.com \-p ldap/foo.example.com \-k /tmp/ldap.keytab
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.SH "EXIT STATUS"
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The exit status is 0 on success, nonzero on error.
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