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  • Committer: Teddy Hogeborn
  • Date: 2015-07-08 21:18:49 UTC
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 325.
  • Revision ID: teddy@recompile.se-20150708211849-scisutuofnxumqc7
mandos-client: Add --dh-params FILE option.

* plugins.d/mandos-client.c: Added --dh-params FILE option.
  (init_gnutls_global): New "dhparamsfilename" argument.  All callers
                        changed.  Read and use Diffie-Hellman
                        parameters from it.  Bug fix:  check for error
                        when opening seckeyfile for the second time.
  (init_gnutls_session): Remove unnecessary call to
                         gnutls_dh_set_prime_bits();
  (main): New variable "dh_params_file".
  (main/argp_options): Added "--dh-params" option.
  (main/parse_opt): - '' -
* plugins.d/mandos-client.xml (SYNOPSIS): Add --dh-params option.
  (OPTIONS): Document --dh-params option and document that the
             --dh-bits options is potentially overridden by the
             --dh-params option.

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mandos.xml
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY COMMANDNAME "mandos">
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<!ENTITY TIMESTAMP "2011-08-08">
 
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<!ENTITY TIMESTAMP "2015-01-25">
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<!ENTITY % common SYSTEM "common.ent">
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%common;
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]>
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        <firstname>Björn</firstname>
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        <surname>Påhlsson</surname>
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        <address>
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          <email>belorn@fukt.bsnet.se</email>
 
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          <email>belorn@recompile.se</email>
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        </address>
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      </author>
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      <author>
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        <firstname>Teddy</firstname>
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        <surname>Hogeborn</surname>
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        <address>
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          <email>teddy@fukt.bsnet.se</email>
 
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          <email>teddy@recompile.se</email>
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        </address>
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      </author>
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    </authorgroup>
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      <year>2009</year>
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      <year>2010</year>
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      <year>2011</year>
 
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      <year>2012</year>
 
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      <year>2013</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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      <arg><option>--no-dbus</option></arg>
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      <sbr/>
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      <arg><option>--no-ipv6</option></arg>
 
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      <sbr/>
 
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      <arg><option>--no-restore</option></arg>
 
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      <sbr/>
 
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      <arg><option>--statedir
 
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      <replaceable>DIRECTORY</replaceable></option></arg>
 
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      <sbr/>
 
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      <arg><option>--socket
 
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      <replaceable>FD</replaceable></option></arg>
 
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      <sbr/>
 
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      <arg><option>--foreground</option></arg>
 
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      <sbr/>
 
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      <arg><option>--no-zeroconf</option></arg>
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    </cmdsynopsis>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
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        <term><option>--priority <replaceable>
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        PRIORITY</replaceable></option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml" xpointer="priority"/>
 
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          <xi:include href="mandos-options.xml"
 
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                      xpointer="priority_compat"/>
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        </listitem>
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      </varlistentry>
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          <xi:include href="mandos-options.xml" xpointer="ipv6"/>
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        </listitem>
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>--no-restore</option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="restore"/>
 
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          <para>
 
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            See also <xref linkend="persistent_state"/>.
 
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          </para>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>--statedir
 
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        <replaceable>DIRECTORY</replaceable></option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="statedir"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>--socket
 
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        <replaceable>FD</replaceable></option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="socket"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>--foreground</option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml"
 
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                      xpointer="foreground"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>--no-zeroconf</option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="zeroconf"/>
 
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        </listitem>
 
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      </varlistentry>
 
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    </variablelist>
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  </refsect1>
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      extended timeout, checker program, and interval between checks
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      can be configured both globally and per client; see
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      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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      <manvolnum>5</manvolnum></citerefentry>.  A client successfully
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      receiving its password will also be treated as a successful
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      checker run.
 
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      <manvolnum>5</manvolnum></citerefentry>.
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    </para>
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  </refsect1>
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    <title>LOGGING</title>
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    <para>
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      The server will send log message with various severity levels to
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      <filename>/dev/log</filename>.  With the
 
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      <filename class="devicefile">/dev/log</filename>.  With the
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      <option>--debug</option> option, it will log even more messages,
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      and also show them on the console.
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    </para>
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  </refsect1>
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  <refsect1 id="persistent_state">
 
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    <title>PERSISTENT STATE</title>
 
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    <para>
 
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      Client settings, initially read from
 
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      <filename>clients.conf</filename>, are persistent across
 
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      restarts, and run-time changes will override settings in
 
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      <filename>clients.conf</filename>.  However, if a setting is
 
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      <emphasis>changed</emphasis> (or a client added, or removed) in
 
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      <filename>clients.conf</filename>, this will take precedence.
 
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    </para>
 
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  </refsect1>
 
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  <refsect1 id="dbus_interface">
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    <title>D-BUS INTERFACE</title>
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    <para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><filename>/var/run/mandos.pid</filename></term>
 
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        <term><filename>/run/mandos.pid</filename></term>
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        <listitem>
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          <para>
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            The file containing the process id of the
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            <command>&COMMANDNAME;</command> process started last.
 
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            <emphasis >Note:</emphasis> If the <filename
 
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            class="directory">/run</filename> directory does not
 
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            exist, <filename>/var/run/mandos.pid</filename> will be
 
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            used instead.
 
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          </para>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><filename class="devicefile">/dev/log</filename></term>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><filename
 
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        class="directory">/var/lib/mandos</filename></term>
 
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        <listitem>
 
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          <para>
 
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            Directory where persistent state will be saved.  Change
 
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            this with the <option>--statedir</option> option.  See
 
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            also the <option>--no-restore</option> option.
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          </para>
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        </listitem>
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      </varlistentry>
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      backtrace.  This could be considered a feature.
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    </para>
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    <para>
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      Currently, if a client is disabled due to having timed out, the
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      server does not record this fact onto permanent storage.  This
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      has some security implications, see <xref linkend="clients"/>.
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    </para>
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    <para>
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      There is no fine-grained control over logging and debug output.
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    </para>
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    <para>
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      Debug mode is conflated with running in the foreground.
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    </para>
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    <para>
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      The console log messages do not show a time stamp.
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    </para>
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    <para>
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      This server does not check the expire time of clients’ OpenPGP
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      keys.
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    </para>
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    <informalexample>
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      <para>
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        Run the server in debug mode, read configuration files from
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        the <filename>~/mandos</filename> directory, and use the
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        Zeroconf service name <quote>Test</quote> to not collide with
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        any other official Mandos server on this host:
 
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        the <filename class="directory">~/mandos</filename> directory,
 
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        and use the Zeroconf service name <quote>Test</quote> to not
 
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        collide with any other official Mandos server on this host:
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      </para>
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      <para>
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        compromised if they are gone for too long.
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      </para>
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      <para>
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        If a client is compromised, its downtime should be duly noted
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        by the server which would therefore disable the client.  But
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        if the server was ever restarted, it would re-read its client
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        list from its configuration file and again regard all clients
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        therein as enabled, and hence eligible to receive their
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        passwords.  Therefore, be careful when restarting servers if
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        it is suspected that a client has, in fact, been compromised
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        by parties who may now be running a fake Mandos client with
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        the keys from the non-encrypted initial <acronym>RAM</acronym>
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        image of the client host.  What should be done in that case
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        (if restarting the server program really is necessary) is to
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        stop the server program, edit the configuration file to omit
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        any suspect clients, and restart the server program.
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      </para>
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      <para>
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        For more details on client-side security, see
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        <citerefentry><refentrytitle>mandos-client</refentrytitle>
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        <manvolnum>8mandos</manvolnum></citerefentry>.
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      </varlistentry>
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      <varlistentry>
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        <term>
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          <ulink url="http://www.gnu.org/software/gnutls/"
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          >GnuTLS</ulink>
 
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          <ulink url="http://gnutls.org/">GnuTLS</ulink>
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        </term>
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      <listitem>
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        <para>
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      </varlistentry>
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      <varlistentry>
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        <term>
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          RFC 4346: <citetitle>The Transport Layer Security (TLS)
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          Protocol Version 1.1</citetitle>
 
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          RFC 5246: <citetitle>The Transport Layer Security (TLS)
 
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          Protocol Version 1.2</citetitle>
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        </term>
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      <listitem>
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        <para>
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          TLS 1.1 is the protocol implemented by GnuTLS.
 
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          TLS 1.2 is the protocol implemented by GnuTLS.
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        </para>
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      </listitem>
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      </varlistentry>
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      </varlistentry>
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      <varlistentry>
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        <term>
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          RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
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          Security</citetitle>
 
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          RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
 
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          Security (TLS) Authentication</citetitle>
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        </term>
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      <listitem>
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        <para>