/mandos/release

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
	"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY VERSION "1.0">
<!ENTITY COMMANDNAME "password-request">
<!ENTITY TIMESTAMP "2008-09-03">
]>

<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
  <refentryinfo>
    <title>Mandos Manual</title>
    <!-- Nwalsh’s docbook scripts use this to generate the footer: -->
    <productname>Mandos</productname>
    <productnumber>&VERSION;</productnumber>
    <date>&TIMESTAMP;</date>
    <authorgroup>
      <author>
	<firstname>Björn</firstname>
	<surname>Påhlsson</surname>
	<address>
	  <email>belorn@fukt.bsnet.se</email>
	</address>
      </author>
      <author>
	<firstname>Teddy</firstname>
	<surname>Hogeborn</surname>
	<address>
	  <email>teddy@fukt.bsnet.se</email>
	</address>
      </author>
    </authorgroup>
    <copyright>
      <year>2008</year>
      <holder>Teddy Hogeborn</holder>
      <holder>Björn Påhlsson</holder>
    </copyright>
    <xi:include href="../legalnotice.xml"/>
  </refentryinfo>

  <refmeta>
    <refentrytitle>&COMMANDNAME;</refentrytitle>
    <manvolnum>8mandos</manvolnum>
  </refmeta>
  
  <refnamediv>
    <refname><command>&COMMANDNAME;</command></refname>
    <refpurpose>
      Client for mandos
    </refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>&COMMANDNAME;</command>
      <group>
	<arg choice="plain"><option>--connect
	<replaceable>IPADDR</replaceable><literal>:</literal
	><replaceable>PORT</replaceable></option></arg>
	<arg choice="plain"><option>-c
	<replaceable>IPADDR</replaceable><literal>:</literal
	><replaceable>PORT</replaceable></option></arg>
      </group>
      <sbr/>
      <group>
	<arg choice="plain"><option>--keydir
	<replaceable>DIRECTORY</replaceable></option></arg>
	<arg choice="plain"><option>-d
	<replaceable>DIRECTORY</replaceable></option></arg>
      </group>
      <sbr/>
      <group>
	<arg choice="plain"><option>--interface
	<replaceable>NAME</replaceable></option></arg>
	<arg choice="plain"><option>-i
	<replaceable>NAME</replaceable></option></arg>
      </group>
      <sbr/>
      <group>
	<arg choice="plain"><option>--pubkey
	<replaceable>FILE</replaceable></option></arg>
	<arg choice="plain"><option>-p
	<replaceable>FILE</replaceable></option></arg>
      </group>
      <sbr/>
      <group>
	<arg choice="plain"><option>--seckey
	<replaceable>FILE</replaceable></option></arg>
	<arg choice="plain"><option>-s
	<replaceable>FILE</replaceable></option></arg>
      </group>
      <sbr/>
      <arg>
	<option>--priority <replaceable>STRING</replaceable></option>
      </arg>
      <sbr/>
      <arg>
	<option>--dh-bits <replaceable>BITS</replaceable></option>
      </arg>
      <sbr/>
      <arg>
	<option>--debug</option>
      </arg>
    </cmdsynopsis>
    <cmdsynopsis>
      <command>&COMMANDNAME;</command>
      <group choice="req">
	<arg choice="plain"><option>--help</option></arg>
	<arg choice="plain"><option>-?</option></arg>
      </group>
    </cmdsynopsis>
    <cmdsynopsis>
      <command>&COMMANDNAME;</command>
      <arg choice="plain"><option>--usage</option></arg>
    </cmdsynopsis>
    <cmdsynopsis>
      <command>&COMMANDNAME;</command>
      <group choice="req">
	<arg choice="plain"><option>--version</option></arg>
	<arg choice="plain"><option>-V</option></arg>
      </group>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1 id="description">
    <title>DESCRIPTION</title>
    <para>
      <command>&COMMANDNAME;</command> is a client program that
      communicates with <citerefentry><refentrytitle
      >mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
      to get a password.  It uses IPv6 link-local addresses to get
      network connectivity, Zeroconf to find the server, and TLS with
      an OpenPGP key to ensure authenticity and confidentiality.  It
      keeps running, trying all servers on the network, until it
      receives a satisfactory reply.
    </para>
    <para>
      This program is not meant to be run directly; it is really meant
      to run as a plugin of the <application>Mandos</application>
      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry>, which runs in the
      initial <acronym>RAM</acronym> disk environment because it is
      specified as a <quote>keyscript</quote> in the <citerefentry>
      <refentrytitle>crypttab</refentrytitle><manvolnum>5</manvolnum>
      </citerefentry> file.
    </para>
  </refsect1>
  
  <refsect1 id="purpose">
    <title>PURPOSE</title>
    <para>
      The purpose of this is to enable <emphasis>remote and unattended
      rebooting</emphasis> of client host computer with an
      <emphasis>encrypted root file system</emphasis>.  See <xref
      linkend="overview"/> for details.
    </para>
  </refsect1>
  
  <refsect1 id="options">
    <title>OPTIONS</title>
    <para>
      This program is commonly not invoked from the command line; it
      is normally started by the <application>Mandos</application>
      plugin runner, see <citerefentry><refentrytitle
      >plugin-runner</refentrytitle><manvolnum>8mandos</manvolnum>
      </citerefentry>.  Any command line options this program accepts
      are therefore normally provided by the plugin runner, and not
      directly.
    </para>
    
    <variablelist>
      <varlistentry>
	<term><option>--connect=<replaceable
	>ADDRESS</replaceable><literal>:</literal><replaceable
	>PORT</replaceable></option></term>
	<term><option>-c
	<replaceable>ADDRESS</replaceable><literal>:</literal
	><replaceable>PORT</replaceable></option></term>
	<listitem>
	  <para>
	    Do not use Zeroconf to locate servers.  Connect directly
	    to only one specified <application>Mandos</application>
	    server.  Note that an IPv6 address has colon characters in
	    it, so the <emphasis>last</emphasis> colon character is
	    assumed to separate the address from the port number.
	  </para>
	  <para>
	    This option is normally only useful for testing and
	    debugging.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--keydir=<replaceable
	>DIRECTORY</replaceable></option></term>
	<term><option>-d
	<replaceable>DIRECTORY</replaceable></option></term>
	<listitem>
	  <para>
	    Directory to read the OpenPGP key files
	    <filename>pubkey.txt</filename> and
	    <filename>seckey.txt</filename> from.  The default is
	    <filename>/conf/conf.d/mandos</filename> (in the initial
	    <acronym>RAM</acronym> disk environment).
	  </para>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term><option>--interface=
	<replaceable>NAME</replaceable></option></term>
	<term><option>-i
	<replaceable>NAME</replaceable></option></term>
	<listitem>
	  <para>
	    Network interface that will be brought up and scanned for
	    Mandos servers to connect to.  The default it
	    <quote><literal>eth0</literal></quote>.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--pubkey=<replaceable
	>FILE</replaceable></option></term>
	<term><option>-p
	<replaceable>FILE</replaceable></option></term>
	<listitem>
	  <para>
	    OpenPGP public key file base name.  This will be combined
	    with the directory from the <option>--keydir</option>
	    option to form an absolute file name.  The default name is
	    <quote><literal>pubkey.txt</literal></quote>.
	  </para>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term><option>--seckey=<replaceable
	>FILE</replaceable></option></term>
	<term><option>-s
	<replaceable>FILE</replaceable></option></term>
	<listitem>
	  <para>
	    OpenPGP secret key file base name.  This will be combined
	    with the directory from the <option>--keydir</option>
	    option to form an absolute file name.  The default name is
	    <quote><literal>seckey.txt</literal></quote>.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--priority=<replaceable
	>STRING</replaceable></option></term>
	<listitem>
	  <xi:include href="../mandos-options.xml"
		      xpointer="priority"/>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term><option>--dh-bits=<replaceable
	>BITS</replaceable></option></term>
	<listitem>
	  <para>
	    Sets the number of bits to use for the prime number in the
	    TLS Diffie-Hellman key exchange.  Default is 1024.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--debug</option></term>
	<listitem>
	  <para>
	    Enable debug mode.  This will enable a lot of output to
	    standard error about what the program is doing.  The
	    program will still perform all other functions normally.
	  </para>
	  <para>
	    It will also enable debug mode in the Avahi and GnuTLS
	    libraries, making them print large amounts of debugging
	    output.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--help</option></term>
	<term><option>-?</option></term>
	<listitem>
	  <para>
	    Gives a help message about options and their meanings.
	  </para>
	</listitem>
      </varlistentry>
      
      <varlistentry>
	<term><option>--usage</option></term>
	<listitem>
	  <para>
	    Gives a short usage message.
	  </para>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term><option>--version</option></term>
	<term><option>-V</option></term>
	<listitem>
	  <para>
	    Prints the program version.
	  </para>
	</listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1 id="overview">
    <title>OVERVIEW</title>
    <xi:include href="../overview.xml"/>
    <para>
      This program is the client part.  It is a plugin started by
      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry> which will run in
      an initial <acronym>RAM</acronym> disk environment.
    </para>
    <para>
      This program could, theoretically, be used as a keyscript in
      <filename>/etc/crypttab</filename>, but it would then be
      impossible to enter the encrypted root disk password at the
      console, since this program does not read from the console at
      all.  This is why a separate plugin does that, which will be run
      in parallell to this one.
    </para>
  </refsect1>
  
  <refsect1 id="exit_status">
    <title>EXIT STATUS</title>
    <para>
      This program will exit with a successful (zero) exit status if a
      server could be found and the password received from it could be
      successfully decrypted and output on standard output.  The
      program will exit with a non-zero exit status only if a critical
      error occurs.  Otherwise, it will forever connect to new
      <application>Mandosservers</application> servers as they appear,
      trying to get a decryptable password.
    </para>
  </refsect1>
  
  <refsect1 id="environment">
    <title>ENVIRONMENT</title>
    <para>
      This program does not use any environment variables, not even
      the ones provided by <citerefentry><refentrytitle
      >cryptsetup</refentrytitle><manvolnum>8</manvolnum>
    </citerefentry>.
    </para>
  </refsect1>
  
  <refsect1 id="file">
    <title>FILES</title>
    <para>
    </para>
  </refsect1>
  
  <refsect1 id="bugs">
    <title>BUGS</title>
    <para>
    </para>
  </refsect1>

  <refsect1 id="example">
    <title>EXAMPLE</title>
    <para>
    </para>
  </refsect1>

  <refsect1 id="security">
    <title>SECURITY</title>
    <para>
    </para>
  </refsect1>

  <refsect1 id="see_also">
    <title>SEE ALSO</title>
    <para>
      <citerefentry><refentrytitle>mandos</refentrytitle>
      <manvolnum>8</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>password-prompt</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry>
    </para>
    <itemizedlist>
      <listitem><para>
	<ulink url="http://www.zeroconf.org/">Zeroconf</ulink>
      </para></listitem>
      
      <listitem><para>
	<ulink url="http://www.avahi.org/">Avahi</ulink>
      </para></listitem>
      
      <listitem><para>
	<ulink
	    url="http://www.gnu.org/software/gnutls/">GnuTLS</ulink>
      </para></listitem>
      
      <listitem><para>
	<ulink
	url="http://www.gnupg.org/related_software/gpgme/"
	>GPGME</ulink>
      </para></listitem>
      
      <listitem><para>
	<citation>RFC 4880: <citetitle>OpenPGP Message
	Format</citetitle></citation>
      </para></listitem>
      
      <listitem><para>
	<citation>RFC 5081: <citetitle>Using OpenPGP Keys for
	Transport Layer Security</citetitle></citation>
      </para></listitem>
      
      <listitem><para>
	<citation>RFC 4291: <citetitle>IP Version 6 Addressing
	Architecture</citetitle>, section 2.5.6, Link-Local IPv6
	Unicast Addresses</citation>
      </para></listitem>
    </itemizedlist>
  </refsect1>

</refentry>
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