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  • Committer: Teddy Hogeborn
  • Date: 2008-12-10 01:26:02 UTC
  • mfrom: (237.1.2 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20081210012602-vhz3h75xkj24t340
First version of a somewhat complete D-Bus server interface.  Also
change user/group name to "_mandos".

* debian/mandos.postinst: Rename old "mandos" user and group to
                          "_mandos"; create "_mandos" user and group
                          if none exist.
* debian/mandos-client.postinst: - '' -

* initramfs-tools-hook: Try "_mandos" before "mandos" as user and
                        group name.

* mandos (_datetime_to_dbus_struct): New; was previously local.
  (Client.started): Renamed to "last_started".  All users changed.
  (Client.started): New; boolean.
  (Client.dbus_object_path): New.
  (Client.check_command): Renamed to "checker_command".  All users
                          changed.
  (Client.__init__): Set and use "self.dbus_object_path".  Set
                     "self.started".
  (Client.start): Update "self.started".  Emit "self.PropertyChanged"
                  signals for both "started" and "last_started".
  (Client.stop): Update "self.started".  Emit "self.PropertyChanged"
                 signal for "started".
  (Client.checker_callback): Take additional "command" argument.  All
                             callers changed. Emit
                             "self.PropertyChanged" signal.
  (Client.bump_timeout): Emit "self.PropertyChanged" signal for
                         "last_checked_ok".
  (Client.start_checker): Emit "self.PropertyChanged" signal for
                          "checker_running".
  (Client.stop_checker): Emit "self.PropertyChanged" signal for
                         "checker_running".
  (Client.still_valid): Bug fix: use "getattr(self, started, False)"
                        instead of "self.started" in case this client
                        object is so new that the "started" attribute
                        has not been created yet.
  (Client.IntervalChanged, Client.CheckerIsRunning, Client.GetChecker,
  Client.GetCreated, Client.GetFingerprint, Client.GetHost,
  Client.GetInterval, Client.GetName, Client.GetStarted,
  Client.GetTimeout, Client.StateChanged, Client.TimeoutChanged):
  Removed; all callers changed.
  (Client.CheckerCompleted): Add "condition" and "command" arguments.
                             All callers changed.
  (Client.GetAllProperties, Client.PropertyChanged): New.
  (Client.StillValid): Renamed to "IsStillValid".
  (Client.StartChecker): Changed to its own function to avoid the
                         return value from "Client.start_checker()".
  (Client.Stop): Changed to its own function to avoid the return value
                 from "Client.stop()".
  (main): Try "_mandos" before "mandos" as user and group name.
          Removed inner function "remove_from_clients".  New inner
          class "MandosServer".

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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-client">
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<!ENTITY TIMESTAMP "2013-10-20">
 
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<!ENTITY TIMESTAMP "2008-10-03">
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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@recompile.se</email>
 
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          <email>belorn@fukt.bsnet.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@recompile.se</email>
 
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          <email>teddy@fukt.bsnet.se</email>
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        </address>
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      </author>
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    </authorgroup>
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    <copyright>
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      <year>2008</year>
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      <year>2009</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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        ><replaceable>PORT</replaceable></option></arg>
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      </group>
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      <sbr/>
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      <group rep='repeat'>
 
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      <group>
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        <arg choice="plain"><option>--interface
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        <replaceable>NAME</replaceable><arg rep='repeat'
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        >,<replaceable>NAME</replaceable></arg></option></arg>
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        <arg choice="plain"><option>-i <replaceable>NAME</replaceable
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        ><arg rep='repeat'>,<replaceable>NAME</replaceable></arg
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        ></option></arg>
 
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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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      </group>
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      <sbr/>
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      <group>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--delay <replaceable>SECONDS</replaceable></option>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--retry <replaceable>SECONDS</replaceable></option>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--network-hook-dir
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        <replaceable>DIR</replaceable></option>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--debug</option>
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      </arg>
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    </cmdsynopsis>
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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.  In slightly more detail, this client program
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      brings up network interfaces, uses the interfaces’ IPv6
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      link-local addresses to get network connectivity, uses Zeroconf
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      to find servers on the local network, and communicates with
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      servers using TLS with an OpenPGP key to ensure authenticity and
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      confidentiality.  This client program keeps running, trying all
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      servers on the network, until it receives a satisfactory reply
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      or a TERM signal.  After all servers have been tried, all
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      servers are periodically retried.  If no servers are found it
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      will wait indefinitely for new servers to appear.
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    </para>
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    <para>
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      The network interfaces are selected like this: If any interfaces
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      are specified using the <option>--interface</option> option,
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      those interface are used.  Otherwise,
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      <command>&COMMANDNAME;</command> will use all interfaces that
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      are not loopback interfaces, are not point-to-point interfaces,
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      are capable of broadcasting and do not have the NOARP flag (see
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      <citerefentry><refentrytitle>netdevice</refentrytitle>
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      <manvolnum>7</manvolnum></citerefentry>).  (If the
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      <option>--connect</option> option is used, point-to-point
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      interfaces and non-broadcast interfaces are accepted.)  If any
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      used interfaces are not up and running, they are first taken up
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      (and later taken down again on program exit).
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    </para>
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    <para>
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      Before network interfaces are selected, all <quote>network
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      hooks</quote> are run; see <xref linkend="network-hooks"/>.
 
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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 servers, and TLS with an
 
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      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 or a TERM signal is received.
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    </para>
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    <para>
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      This program is not meant to be run directly; it is really meant
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      </varlistentry>
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      <varlistentry>
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        <term><option>--interface=<replaceable
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        >NAME</replaceable><arg rep='repeat'>,<replaceable
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        >NAME</replaceable></arg></option></term>
 
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        <term><option>--interface=
 
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        <replaceable>NAME</replaceable></option></term>
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        <term><option>-i
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        <replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
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        >NAME</replaceable></arg></option></term>
 
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        <replaceable>NAME</replaceable></option></term>
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        <listitem>
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          <para>
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            Comma separated list of network interfaces that will be
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            brought up and scanned for Mandos servers to connect to.
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            The default is the empty string, which will automatically
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            use all appropriate interfaces.
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          </para>
242
 
          <para>
243
 
            If the <option>--connect</option> option is used, and
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            exactly one interface name is specified (except
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            <quote><literal>none</literal></quote>), this specifies
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            the interface to use to connect to the address given.
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          </para>
248
 
          <para>
249
 
            Note that since this program will normally run in the
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            initial RAM disk environment, the interface must be an
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            interface which exists at that stage.  Thus, the interface
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            can normally not be a pseudo-interface such as
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            <quote>br0</quote> or <quote>tun0</quote>; such interfaces
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            will not exist until much later in the boot process, and
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            can not be used by this program, unless created by a
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            <quote>network hook</quote> — see <xref
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            linkend="network-hooks"/>.
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          </para>
259
 
          <para>
260
 
            <replaceable>NAME</replaceable> can be the string
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            <quote><literal>none</literal></quote>; this will make
262
 
            <command>&COMMANDNAME;</command> not bring up
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            <emphasis>any</emphasis> interfaces specified
264
 
            <emphasis>after</emphasis> this string.  This is not
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            recommended, and only meant for advanced users.
 
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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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          </para>
 
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          <para>
 
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            If the <option>--connect</option> option is used, this
 
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            specifies the interface to use to connect to the address
 
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            given.
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          </para>
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        </listitem>
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      </varlistentry>
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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>--delay=<replaceable
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        >SECONDS</replaceable></option></term>
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        <listitem>
322
 
          <para>
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            After bringing a network interface up, the program waits
324
 
            for the interface to arrive in a <quote>running</quote>
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            state before proceeding.  During this time, the kernel log
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            level will be lowered to reduce clutter on the system
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            console, alleviating any other plugins which might be
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            using the system console.  This option sets the upper
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            limit of seconds to wait.  The default is 2.5 seconds.
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
335
 
        <term><option>--retry=<replaceable
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        >SECONDS</replaceable></option></term>
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        <listitem>
338
 
          <para>
339
 
            All Mandos servers are tried repeatedly until a password
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            is received.  This value specifies, in seconds, how long
341
 
            between each successive try <emphasis>for the same
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            server</emphasis>.  The default is 10 seconds.
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          </para>
344
 
        </listitem>
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      </varlistentry>
346
 
 
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      <varlistentry>
348
 
        <term><option>--network-hook-dir=<replaceable
349
 
        >DIR</replaceable></option></term>
350
 
        <listitem>
351
 
          <para>
352
 
            Network hook directory.  The default directory is
353
 
            <quote><filename class="directory"
354
 
            >/lib/mandos/network-hooks.d</filename></quote>.
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          </para>
356
 
        </listitem>
357
 
      </varlistentry>
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      <varlistentry>
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        <term><option>--debug</option></term>
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      <refentrytitle>plugin-runner</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>) is used to run
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      both this program and others in in parallel,
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      <emphasis>one</emphasis> of which (<citerefentry>
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      <refentrytitle>password-prompt</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>) will prompt for
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      passwords on the system console.
 
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      <emphasis>one</emphasis> of which will prompt for passwords on
 
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      the system console.
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    </para>
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  </refsect1>
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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 any
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      discovered <application>Mandos</application> servers, trying to
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      get a decryptable password and print it.
 
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      error occurs.  Otherwise, it will forever connect to new
 
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      <application>Mandos</application> servers as they appear, trying
 
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      to get a decryptable password and print it.
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    </para>
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  </refsect1>
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    </para>
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  </refsect1>
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  <refsect1 id="network-hooks">
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    <title>NETWORK HOOKS</title>
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    <para>
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      If a network interface like a bridge or tunnel is required to
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      find a Mandos server, this requires the interface to be up and
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      running before <command>&COMMANDNAME;</command> starts looking
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      for Mandos servers.  This can be accomplished by creating a
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      <quote>network hook</quote> program, and placing it in a special
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      directory.
463
 
    </para>
464
 
    <para>
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      Before the network is used (and again before program exit), any
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      runnable programs found in the network hook directory are run
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      with the argument <quote><literal>start</literal></quote> or
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      <quote><literal>stop</literal></quote>.  This should bring up or
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      down, respectively, any network interface which
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      <command>&COMMANDNAME;</command> should use.
471
 
    </para>
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    <refsect2 id="hook-requirements">
473
 
      <title>REQUIREMENTS</title>
474
 
      <para>
475
 
        A network hook must be an executable file, and its name must
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        consist entirely of upper and lower case letters, digits,
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        underscores, periods, and hyphens.
478
 
      </para>
479
 
      <para>
480
 
        A network hook will receive one argument, which can be one of
481
 
        the following:
482
 
      </para>
483
 
      <variablelist>
484
 
        <varlistentry>
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          <term><literal>start</literal></term>
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          <listitem>
487
 
            <para>
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              This should make the network hook create (if necessary)
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              and bring up a network interface.
490
 
            </para>
491
 
          </listitem>
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        </varlistentry>
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        <varlistentry>
494
 
          <term><literal>stop</literal></term>
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          <listitem>
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            <para>
497
 
              This should make the network hook take down a network
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              interface, and delete it if it did not exist previously.
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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><literal>files</literal></term>
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          <listitem>
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            <para>
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              This should make the network hook print, <emphasis>one
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              file per line</emphasis>, all the files needed for it to
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              run.  (These files will be copied into the initial RAM
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              filesystem.)  Typical use is for a network hook which is
510
 
              a shell script to print its needed binaries.
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            </para>
512
 
            <para>
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              It is not necessary to print any non-executable files
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              already in the network hook directory, these will be
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              copied implicitly if they otherwise satisfy the name
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              requirements.
517
 
            </para>
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          </listitem>
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        </varlistentry>
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        <varlistentry>
521
 
          <term><literal>modules</literal></term>
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          <listitem>
523
 
            <para>
524
 
              This should make the network hook print, <emphasis>on
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              separate lines</emphasis>, all the kernel modules needed
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              for it to run.  (These modules will be copied into the
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              initial RAM filesystem.)  For instance, a tunnel
528
 
              interface needs the
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              <quote><literal>tun</literal></quote> module.
530
 
            </para>
531
 
          </listitem>
532
 
        </varlistentry>
533
 
      </variablelist>
534
 
      <para>
535
 
        The network hook will be provided with a number of environment
536
 
        variables:
537
 
      </para>
538
 
      <variablelist>
539
 
        <varlistentry>
540
 
          <term><envar>MANDOSNETHOOKDIR</envar></term>
541
 
          <listitem>
542
 
            <para>
543
 
              The network hook directory, specified to
544
 
              <command>&COMMANDNAME;</command> by the
545
 
              <option>--network-hook-dir</option> option.  Note: this
546
 
              should <emphasis>always</emphasis> be used by the
547
 
              network hook to refer to itself or any files in the hook
548
 
              directory it may require.
549
 
            </para>
550
 
          </listitem>
551
 
        </varlistentry>
552
 
        <varlistentry>
553
 
          <term><envar>DEVICE</envar></term>
554
 
          <listitem>
555
 
            <para>
556
 
              The network interfaces, as specified to
557
 
              <command>&COMMANDNAME;</command> by the
558
 
              <option>--interface</option> option, combined to one
559
 
              string and separated by commas.  If this is set, and
560
 
              does not contain the interface a hook will bring up,
561
 
              there is no reason for a hook to continue.
562
 
            </para>
563
 
          </listitem>
564
 
        </varlistentry>
565
 
        <varlistentry>
566
 
          <term><envar>MODE</envar></term>
567
 
          <listitem>
568
 
            <para>
569
 
              This will be the same as the first argument;
570
 
              i.e. <quote><literal>start</literal></quote>,
571
 
              <quote><literal>stop</literal></quote>,
572
 
              <quote><literal>files</literal></quote>, or
573
 
              <quote><literal>modules</literal></quote>.
574
 
            </para>
575
 
          </listitem>
576
 
        </varlistentry>
577
 
        <varlistentry>
578
 
          <term><envar>VERBOSITY</envar></term>
579
 
          <listitem>
580
 
            <para>
581
 
              This will be the <quote><literal>1</literal></quote> if
582
 
              the <option>--debug</option> option is passed to
583
 
              <command>&COMMANDNAME;</command>, otherwise
584
 
              <quote><literal>0</literal></quote>.
585
 
            </para>
586
 
          </listitem>
587
 
        </varlistentry>
588
 
        <varlistentry>
589
 
          <term><envar>DELAY</envar></term>
590
 
          <listitem>
591
 
            <para>
592
 
              This will be the same as the <option>--delay</option>
593
 
              option passed to <command>&COMMANDNAME;</command>.  Is
594
 
              only set if <envar>MODE</envar> is
595
 
              <quote><literal>start</literal></quote> or
596
 
              <quote><literal>stop</literal></quote>.
597
 
            </para>
598
 
          </listitem>
599
 
        </varlistentry>
600
 
        <varlistentry>
601
 
          <term><envar>CONNECT</envar></term>
602
 
          <listitem>
603
 
            <para>
604
 
              This will be the same as the <option>--connect</option>
605
 
              option passed to <command>&COMMANDNAME;</command>.  Is
606
 
              only set if <option>--connect</option> is passed and
607
 
              <envar>MODE</envar> is
608
 
              <quote><literal>start</literal></quote> or
609
 
              <quote><literal>stop</literal></quote>.
610
 
            </para>
611
 
          </listitem>
612
 
        </varlistentry>
613
 
      </variablelist>
614
 
      <para>
615
 
        A hook may not read from standard input, and should be
616
 
        restrictive in printing to standard output or standard error
617
 
        unless <varname>VERBOSITY</varname> is
618
 
        <quote><literal>1</literal></quote>.
619
 
      </para>
620
 
    </refsect2>
621
 
  </refsect1>
622
 
  
623
347
  <refsect1 id="files">
624
348
    <title>FILES</title>
625
349
    <variablelist>
637
361
          </para>
638
362
        </listitem>
639
363
      </varlistentry>
640
 
      <varlistentry>
641
 
        <term><filename
642
 
        class="directory">/lib/mandos/network-hooks.d</filename></term>
643
 
        <listitem>
644
 
          <para>
645
 
            Directory where network hooks are located.  Change this
646
 
            with the <option>--network-hook-dir</option> option.  See
647
 
            <xref linkend="network-hooks"/>.
648
 
          </para>
649
 
        </listitem>
650
 
      </varlistentry>
651
364
    </variablelist>
652
365
  </refsect1>
653
366
  
667
380
    </para>
668
381
    <informalexample>
669
382
      <para>
670
 
        Normal invocation needs no options, if the network interfaces
671
 
        can be automatically determined:
 
383
        Normal invocation needs no options, if the network interface
 
384
        is <quote>eth0</quote>:
672
385
      </para>
673
386
      <para>
674
387
        <userinput>&COMMANDNAME;</userinput>
676
389
    </informalexample>
677
390
    <informalexample>
678
391
      <para>
679
 
        Search for Mandos servers (and connect to them) using one
680
 
        specific interface:
 
392
        Search for Mandos servers (and connect to them) using another
 
393
        interface:
681
394
      </para>
682
395
      <para>
683
396
        <!-- do not wrap this line -->
698
411
    <informalexample>
699
412
      <para>
700
413
        Run in debug mode, with a custom key, and do not use Zeroconf
701
 
        to locate a server; connect directly to the IPv6 link-local
702
 
        address <quote><systemitem class="ipaddress"
703
 
        >fe80::aede:48ff:fe71:f6f2</systemitem></quote>, port 4711,
704
 
        using interface eth2:
 
414
        to locate a server; connect directly to the IPv6 address
 
415
        <quote><systemitem class="ipaddress"
 
416
        >2001:db8:f983:bd0b:30de:ae4a:71f2:f672</systemitem></quote>,
 
417
        port 4711, using interface eth2:
705
418
      </para>
706
419
      <para>
707
420
 
708
421
<!-- do not wrap this line -->
709
 
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --connect fe80::aede:48ff:fe71:f6f2:4711 --interface eth2</userinput>
 
422
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --connect 2001:db8:f983:bd0b:30de:ae4a:71f2:f672:4711 --interface eth2</userinput>
710
423
 
711
424
      </para>
712
425
    </informalexample>
762
475
  <refsect1 id="see_also">
763
476
    <title>SEE ALSO</title>
764
477
    <para>
765
 
      <citerefentry><refentrytitle>intro</refentrytitle>
766
 
      <manvolnum>8mandos</manvolnum></citerefentry>,
767
478
      <citerefentry><refentrytitle>cryptsetup</refentrytitle>
768
479
      <manvolnum>8</manvolnum></citerefentry>,
769
480
      <citerefentry><refentrytitle>crypttab</refentrytitle>
847
558
              <para>
848
559
                This client uses IPv6 link-local addresses, which are
849
560
                immediately usable since a link-local addresses is
850
 
                automatically assigned to a network interface when it
 
561
                automatically assigned to a network interfaces when it
851
562
                is brought up.
852
563
              </para>
853
564
            </listitem>