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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
<reference>
<title>SSSD Manual pages</title>
<refentry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="include/upstream.xml" />
<refmeta>
<refentrytitle>sssd-krb5</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo class="manual">File Formats and Conventions</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>sssd-krb5</refname>
<refpurpose>the configuration file for SSSD</refpurpose>
</refnamediv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
This manual page describes the configuration of the Kerberos
5 authentication backend for
<citerefentry>
<refentrytitle>sssd</refentrytitle>
<manvolnum>8</manvolnum>
</citerefentry>.
For a detailed syntax reference, please refer to the <quote>FILE FORMAT</quote> section of the
<citerefentry>
<refentrytitle>sssd.conf</refentrytitle>
<manvolnum>5</manvolnum>
</citerefentry> manual page
</para>
<para>
The Kerberos 5 authentication backend does not contain an identity
provider and must be paired with one in order to function properly (for
example, id_provider = ldap). Some information required by the Kerberos
5 authentication backend must be provided by the identity provider, such
as the user's Kerberos Principal Name (UPN). The configuration of the
identity provider should have an entry to specify the UPN. Please refer
to the man page for the applicable identity provider for details on how
to configure this.
</para>
<para>
In the case where the UPN is not available in the identity backend
<command>sssd</command> will construct a UPN using the format
<replaceable>username</replaceable>@<replaceable>krb5_realm</replaceable>.
</para>
</refsect1>
<refsect1 id='file-format'>
<title>CONFIGURATION OPTIONS</title>
<para>
If the auth-module krb5 is used in a SSSD domain, the following
options must be used. See the
<citerefentry>
<refentrytitle>sssd.conf</refentrytitle>
<manvolnum>5</manvolnum>
</citerefentry> manual page, section <quote>DOMAIN SECTIONS</quote>
for details on the configuration of a SSSD domain.
<variablelist>
<varlistentry>
<term>krb5_kdcip (string)</term>
<listitem>
<para>
Specifies the list of IP addresses or hostnames
of the Kerberos servers to which SSSD should
connect in the order of preference. For more
information on failover and server redundancy,
see the <quote>FAILOVER</quote> section.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_realm (string)</term>
<listitem>
<para>
The name of the Kerberos realm.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_changepw_principal (string)</term>
<listitem>
<para>
The priciple of the change password service.
If only the 'identifier/instance' part of the
principal are given the realm part is added
automatically.
</para>
<para>
Default: kadmin/changepw
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_ccachedir (string)</term>
<listitem>
<para>
Directory to store credential caches.
</para>
<para>
Default: /tmp
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_ccname_template (string)</term>
<listitem>
<para>
Location of the user's credential cache. Currently
only file based credential caches are supported. In
the template the following sequences are
substituted:
<variablelist>
<varlistentry>
<term>%u</term>
<listitem><para>login name</para></listitem>
</varlistentry>
<varlistentry>
<term>%U</term>
<listitem><para>login UID</para></listitem>
</varlistentry>
<varlistentry>
<term>%p</term>
<listitem><para>principal name</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%r</term>
<listitem><para>realm name</para></listitem>
</varlistentry>
<varlistentry>
<term>%h</term>
<listitem><para>home directory</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%d</term>
<listitem><para>value of krb5ccache_dir
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%P</term>
<listitem><para>the process ID of the sssd
client</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%%</term>
<listitem><para>a literal '%'</para>
</listitem>
</varlistentry>
</variablelist>
If the template ends with 'XXXXXX' mkstemp(3) is
used to create a unique filename in a safe way.
</para>
<para>
Default: FILE:%d/krb5cc_%U_XXXXXX
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_auth_timeout (integer)</term>
<listitem>
<para>
Timeout in seconds after an online authentication or
change password request is aborted. If possible the
authentication request is continued offline.
</para>
<para>
Default: 15
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_validate (boolean)</term>
<listitem>
<para>
Verify with the help of krb5_keytab that the TGT obtained has not been spoofed.
</para>
<para>
Default: false
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>krb5_keytab (string)</term>
<listitem>
<para>
The location of the keytab to use when validating
credentials obtained from KDCs.
</para>
<para>
Default: /etc/krb5.keytab
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="include/failover.xml" />
<refsect1 id='example'>
<title>EXAMPLE</title>
<para>
The following example assumes that SSSD is correctly
configured and FOO is one of the domains in the
<replaceable>[sssd]</replaceable> section. This example shows
only configuration of Kerberos authentication, it does not include
any identity provider.
</para>
<para>
<programlisting>
[domain/FOO]
auth_provider = krb5
krb5_kdcip = 192.168.1.1
krb5_realm = EXAMPLE.COM
</programlisting>
</para>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>sssd.conf</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>sssd-ldap</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>sssd</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>
</para>
</refsect1>
</refentry>
</reference>
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