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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>