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<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
<reference>
<title>GssProxy GSSAPI mechanism manual page</title>
<refentry>
    <refentryinfo>
        <productname>GSS Proxy</productname>
        <orgname>GSS-Proxy - http://fedorahosted.org/gss-proxy</orgname>
    </refentryinfo>

    <refmeta>
        <refentrytitle>gssproxy-mech</refentrytitle>
        <manvolnum>8</manvolnum>
    </refmeta>

    <refnamediv id='name'>
        <refname>gssproxy-mech</refname>
        <refpurpose>GssProxy GSSAPI mechanism plugin</refpurpose>
    </refnamediv>

    <refsynopsisdiv id='synopsis'>
        <cmdsynopsis>
            <command>proxymech_v1 2.16.840.1.113730.3.8.15.1 /usr/lib64/gssproxy/proxymech.so </command>
            <arg choice='opt'>
                <replaceable>options</replaceable>
            </arg>
        </cmdsynopsis>
    </refsynopsisdiv>

    <refsect1 id='description'>
        <title>DESCRIPTION</title>
        <para>
            The gssproxy proxymech module is a interposer plugin that is
            loaded by GSSAPI. It is enabled by
            <filename>/etc/gss/mech</filename> configuration file.
        </para>
        <para>
            The interposer plugin allows to intercept the entire GSSAPI
            communication and detour to the <command>gssproxy</command>
            daemon. When the interposer plugin is installed two other
            conditions need to be met in order to activate it:
        </para>
	<variablelist>
            <varlistentry>
                <term>a) interposer configuration file</term>
                <listitem>
                    <para>The plugin needs to be manually enabled in the
                        <filename>/etc/gss/mech</filename> file.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>b) gssproxy environment variable</term>
                <listitem>
                    <para>
                        The interposer plugin will not forward to the
                        gssproxy daemon unless the environment variable
                        named <emphasis>GSS_USE_PROXY=yes</emphasis> is set.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
        <para>
            Furthermore, the interposer plugin can be configured to behave in
            different ways when called from the GSSAPI. This behavior is
            controlled via the <emphasis>GSSPROXY_BEHAVIOR</emphasis>
            environment variable. It accepts four different values:
        </para>
        <variablelist>
            <varlistentry>
                <term>LOCAL_ONLY</term>
                <listitem>
                    <para>All commands received with this setting will cause
                        to immediately reenter the GSSAPI w/o any interaction
                        with the gssproxy daemon. When the request cannot be
                        processed it will just fail.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>LOCAL_FIRST</term>
                <listitem>
                    <para>All commands received with this setting will cause
                        to immediately reenter the GSSAPI. When the local
                        GSSAPI cannot process the request, it will resend the
                        request to the gssproxy daemon.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>REMOTE_FIRST</term>
                <listitem>
                    <para>All commands received with this setting will be
                        forwarded to the gssproxy daemon first. If the request
                        cannot be handled there, the request will reenter the
                        local GSSAPI.
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>REMOTE_ONLY</term>
                <listitem>
                    <para>This setting is currently not fully implemented and
                        therefor not supported.
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
        <para>
                The default setting for <emphasis>GSSPROXY_BEHAVIOR</emphasis>
                is LOCAL_FIRST.
        </para>

        <para>
            Finally the interposer may need to use a special per-service
            socket in order to communicate with gssproxy. The path to this
            socket is set via the <emphasis>GSSPROXY_SOCKET</emphasis>
            environment variable.
        </para>
    </refsect1>

    <refsect1 id='see_also'>
        <title>SEE ALSO</title>
        <para>
            <citerefentry>
                <refentrytitle>gssproxy.conf</refentrytitle><manvolnum>5</manvolnum>
            </citerefentry> and
            <citerefentry>
                <refentrytitle>gssproxy</refentrytitle><manvolnum>8</manvolnum>
            </citerefentry>.
        </para>
    </refsect1>
</refentry>
</reference>