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<?xml version="1.0" encoding="UTF-8"?>
 
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
 
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<!ENTITY VERSION "1.0">
 
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<!ENTITY COMMANDNAME "password-request">
 
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<!ENTITY TIMESTAMP "2008-09-03">
 
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<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
 
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    <title>Mandos Manual</title>
 
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    <!-- Nwalsh’s docbook scripts use this to generate the footer: -->
 
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    <productname>Mandos</productname>
 
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    <productnumber>&VERSION;</productnumber>
 
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    <date>&TIMESTAMP;</date>
 
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        <firstname>Björn</firstname>
 
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        <surname>Påhlsson</surname>
 
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          <email>belorn@fukt.bsnet.se</email>
 
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        <firstname>Teddy</firstname>
 
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        <surname>Hogeborn</surname>
 
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          <email>teddy@fukt.bsnet.se</email>
 
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      <holder>Teddy Hogeborn</holder>
 
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      <holder>Björn Påhlsson</holder>
 
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    <xi:include href="../legalnotice.xml"/>
 
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    <refentrytitle>&COMMANDNAME;</refentrytitle>
 
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    <manvolnum>8mandos</manvolnum>
 
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    <refname><command>&COMMANDNAME;</command></refname>
 
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      <command>&COMMANDNAME;</command>
 
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        <arg choice="plain"><option>--connect
 
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        <replaceable>IPADDR</replaceable><literal>:</literal
 
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        ><replaceable>PORT</replaceable></option></arg>
 
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        <arg choice="plain"><option>-c
 
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        <replaceable>IPADDR</replaceable><literal>:</literal
 
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        ><replaceable>PORT</replaceable></option></arg>
 
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        <arg choice="plain"><option>--keydir
 
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        <replaceable>DIRECTORY</replaceable></option></arg>
 
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        <arg choice="plain"><option>-d
 
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        <replaceable>DIRECTORY</replaceable></option></arg>
 
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        <arg choice="plain"><option>--interface
 
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        <replaceable>NAME</replaceable></option></arg>
 
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        <arg choice="plain"><option>-i
 
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        <replaceable>NAME</replaceable></option></arg>
 
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        <arg choice="plain"><option>--pubkey
 
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        <replaceable>FILE</replaceable></option></arg>
 
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        <arg choice="plain"><option>-p
 
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        <replaceable>FILE</replaceable></option></arg>
 
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        <arg choice="plain"><option>--seckey
 
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        <replaceable>FILE</replaceable></option></arg>
 
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        <arg choice="plain"><option>-s
 
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        <replaceable>FILE</replaceable></option></arg>
 
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        <option>--priority <replaceable>STRING</replaceable></option>
 
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        <option>--dh-bits <replaceable>BITS</replaceable></option>
 
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        <option>--debug</option>
 
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      <command>&COMMANDNAME;</command>
 
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        <arg choice="plain"><option>--help</option></arg>
 
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        <arg choice="plain"><option>-?</option></arg>
 
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      <command>&COMMANDNAME;</command>
 
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      <arg choice="plain"><option>--usage</option></arg>
 
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      <command>&COMMANDNAME;</command>
 
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        <arg choice="plain"><option>--version</option></arg>
 
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        <arg choice="plain"><option>-V</option></arg>
 
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  <refsect1 id="description">
 
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    <title>DESCRIPTION</title>
 
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      <command>&COMMANDNAME;</command> is a client program that
 
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      communicates with <citerefentry><refentrytitle
 
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      >mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 
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      to get a password.  It uses IPv6 link-local addresses to get
 
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      network connectivity, Zeroconf to find the server, and TLS with
 
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      an OpenPGP key to ensure authenticity and confidentiality.  It
 
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      keeps running, trying all servers on the network, until it
 
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      receives a satisfactory reply.
 
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      This program is not meant to be run directly; it is really meant
 
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      to run as a plugin of the <application>Mandos</application>
 
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      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry>, which runs in the
 
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      initial <acronym>RAM</acronym> disk environment because it is
 
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      specified as a <quote>keyscript</quote> in the <citerefentry>
 
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      <refentrytitle>crypttab</refentrytitle><manvolnum>5</manvolnum>
 
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      </citerefentry> file.
 
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  <refsect1 id="purpose">
 
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    <title>PURPOSE</title>
 
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      The purpose of this is to enable <emphasis>remote and unattended
 
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      rebooting</emphasis> of client host computer with an
 
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      <emphasis>encrypted root file system</emphasis>.  See <xref
 
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      linkend="overview"/> for details.
 
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  <refsect1 id="options">
 
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    <title>OPTIONS</title>
 
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      This program is commonly not invoked from the command line; it
 
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      is normally started by the <application>Mandos</application>
 
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      plugin runner, see <citerefentry><refentrytitle
 
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      >plugin-runner</refentrytitle><manvolnum>8mandos</manvolnum>
 
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      </citerefentry>.  Any command line options this program accepts
 
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      are therefore normally provided by the plugin runner, and not
 
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        <term><option>--connect=<replaceable
 
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        >ADDRESS</replaceable><literal>:</literal><replaceable
 
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        >PORT</replaceable></option></term>
 
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        <replaceable>ADDRESS</replaceable><literal>:</literal
 
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        ><replaceable>PORT</replaceable></option></term>
 
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            Do not use Zeroconf to locate servers.  Connect directly
 
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            to only one specified <application>Mandos</application>
 
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            server.  Note that an IPv6 address has colon characters in
 
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            it, so the <emphasis>last</emphasis> colon character is
 
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            assumed to separate the address from the port number.
 
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            This option is normally only useful for testing and
 
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        <term><option>--keydir=<replaceable
 
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        >DIRECTORY</replaceable></option></term>
 
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        <replaceable>DIRECTORY</replaceable></option></term>
 
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            Directory to read the OpenPGP key files
 
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            <filename>pubkey.txt</filename> and
 
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            <filename>seckey.txt</filename> from.  The default is
 
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            <filename>/conf/conf.d/mandos</filename> (in the initial
 
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            <acronym>RAM</acronym> disk environment).
 
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        <term><option>--interface=
 
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        <replaceable>NAME</replaceable></option></term>
 
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        <replaceable>NAME</replaceable></option></term>
 
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            Network interface that will be brought up and scanned for
 
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            Mandos servers to connect to.  The default it
 
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            <quote><literal>eth0</literal></quote>.
 
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        <term><option>--pubkey=<replaceable
 
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        >FILE</replaceable></option></term>
 
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        <replaceable>FILE</replaceable></option></term>
 
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            OpenPGP public key file base name.  This will be combined
 
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            with the directory from the <option>--keydir</option>
 
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            option to form an absolute file name.  The default name is
 
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            <quote><literal>pubkey.txt</literal></quote>.
 
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        <term><option>--seckey=<replaceable
 
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        >FILE</replaceable></option></term>
 
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        <replaceable>FILE</replaceable></option></term>
 
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            OpenPGP secret key file base name.  This will be combined
 
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            with the directory from the <option>--keydir</option>
 
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            option to form an absolute file name.  The default name is
 
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            <quote><literal>seckey.txt</literal></quote>.
 
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        <term><option>--priority=<replaceable
 
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        >STRING</replaceable></option></term>
 
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          <xi:include href="../mandos-options.xml"
 
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                      xpointer="priority"/>
 
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        <term><option>--dh-bits=<replaceable
 
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        >BITS</replaceable></option></term>
 
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            Sets the number of bits to use for the prime number in the
 
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            TLS Diffie-Hellman key exchange.  Default is 1024.
 
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        <term><option>--debug</option></term>
 
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            Enable debug mode.  This will enable a lot of output to
 
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            standard error about what the program is doing.  The
 
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            program will still perform all other functions normally.
 
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            It will also enable debug mode in the Avahi and GnuTLS
 
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            libraries, making them print large amounts of debugging
 
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        <term><option>--help</option></term>
 
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        <term><option>-?</option></term>
 
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            Gives a help message about options and their meanings.
 
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        <term><option>--usage</option></term>
 
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            Gives a short usage message.
 
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        <term><option>--version</option></term>
 
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        <term><option>-V</option></term>
 
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            Prints the program version.
 
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  <refsect1 id="overview">
 
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    <title>OVERVIEW</title>
 
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    <xi:include href="../overview.xml"/>
 
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      This program is the client part.  It is a plugin started by
 
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      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry> which will run in
 
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      an initial <acronym>RAM</acronym> disk environment.
 
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      This program could, theoretically, be used as a keyscript in
 
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      <filename>/etc/crypttab</filename>, but it would then be
 
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      impossible to enter the encrypted root disk password at the
 
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      console, since this program does not read from the console at
 
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      all.  This is why a separate plugin does that, which will be run
 
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      in parallell to this one.
 
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  <refsect1 id="exit_status">
 
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    <title>EXIT STATUS</title>
 
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      This program will exit with a successful (zero) exit status if a
 
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      server could be found and the password received from it could be
 
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      successfully decrypted and output on standard output.  The
 
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      program will exit with a non-zero exit status only if a critical
 
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      error occurs.  Otherwise, it will forever connect to new
 
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      <application>Mandosservers</application> servers as they appear,
 
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      trying to get a decryptable password.
 
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  <refsect1 id="environment">
 
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    <title>ENVIRONMENT</title>
 
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      This program does not use any environment variables, not even
 
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      the ones provided by <citerefentry><refentrytitle
 
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      >cryptsetup</refentrytitle><manvolnum>8</manvolnum>
 
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  <refsect1 id="example">
 
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    <title>EXAMPLE</title>
 
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  <refsect1 id="security">
 
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    <title>SECURITY</title>
 
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  <refsect1 id="see_also">
 
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    <title>SEE ALSO</title>
 
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      <citerefentry><refentrytitle>mandos</refentrytitle>
 
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      <manvolnum>8</manvolnum></citerefentry>,
 
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      <citerefentry><refentrytitle>password-prompt</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry>,
 
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      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry>
 
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        <ulink url="http://www.zeroconf.org/">Zeroconf</ulink>
 
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        <ulink url="http://www.avahi.org/">Avahi</ulink>
 
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            url="http://www.gnu.org/software/gnutls/">GnuTLS</ulink>
 
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        url="http://www.gnupg.org/related_software/gpgme/"
 
417
 
        <citation>RFC 4880: <citetitle>OpenPGP Message
 
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        Format</citetitle></citation>
 
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        <citation>RFC 5081: <citetitle>Using OpenPGP Keys for
 
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        Transport Layer Security</citetitle></citation>
 
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        <citation>RFC 4291: <citetitle>IP Version 6 Addressing
 
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        Architecture</citetitle>, section 2.5.6, Link-Local IPv6
 
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        Unicast Addresses</citation>
 
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