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  • Committer: Teddy Hogeborn
  • Date: 2012-06-22 23:33:56 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 303.
  • Revision ID: teddy@recompile.se-20120622233356-odoqqt2ki2gssn37
* Makefile (check): Also check mandos-ctl.
* mandos-ctl: All options taking a time interval argument can now take
              an RFC 3339 duration.
  (rfc3339_duration_to_delta): New function.
  (string_to_delta): Try rfc3339_duration_to_delta first.
  (main): New "--check" option.
* mandos-ctl.xml (SYNOPSIS, OPTIONS): Document new "--check" option.

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plugins.d/mandos-client.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-client">
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<!ENTITY TIMESTAMP "2009-01-04">
 
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<!ENTITY TIMESTAMP "2012-06-17">
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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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    <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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      <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>
 
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      <group rep='repeat'>
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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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        <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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      </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>--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.  It uses IPv6 link-local addresses to get
130
 
      network connectivity, Zeroconf to find servers, and TLS with an
131
 
      OpenPGP key to ensure authenticity and confidentiality.  It
132
 
      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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      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>
 
152
    <para>
 
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      The network interfaces are selected like this: If any interfaces
 
154
      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
 
161
      <option>--connect</option> option is used, point-to-point
 
162
      interfaces and non-broadcast interfaces are accepted.)  If any
 
163
      used interfaces are not up and running, they are first taken up
 
164
      (and later taken down again on program exit).
 
165
    </para>
 
166
    <para>
 
167
      Before network interfaces are selected, all <quote>network
 
168
      hooks</quote> are run; see <xref linkend="network-hooks"/>.
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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=
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        <replaceable>NAME</replaceable></option></term>
 
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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>-i
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        <replaceable>NAME</replaceable></option></term>
 
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        <replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
 
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        >NAME</replaceable></arg></option></term>
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        <listitem>
198
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          <para>
199
 
            Network interface that will be brought up and scanned for
200
 
            Mandos servers to connect to.  The default it
201
 
            <quote><literal>eth0</literal></quote>.
202
 
          </para>
203
 
          <para>
204
 
            If the <option>--connect</option> option is used, this
205
 
            specifies the interface to use to connect to the address
206
 
            given.
 
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            Comma separated list of network interfaces that will be
 
237
            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.
 
240
          </para>
 
241
          <para>
 
242
            If the <option>--connect</option> option is used, and
 
243
            exactly one interface name is specified (except
 
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            <quote><literal>none</literal></quote>), this specifies
 
245
            the interface to use to connect to the address given.
 
246
          </para>
 
247
          <para>
 
248
            Note that since this program will normally run in the
 
249
            initial RAM disk environment, the interface must be an
 
250
            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
 
253
            will not exist until much later in the boot process, and
 
254
            can not be used by this program, unless created by a
 
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            <quote>network hook</quote> — see <xref
 
256
            linkend="network-hooks"/>.
 
257
          </para>
 
258
          <para>
 
259
            <replaceable>NAME</replaceable> can be the string
 
260
            <quote><literal>none</literal></quote>; this will make
 
261
            <command>&COMMANDNAME;</command> not bring up
 
262
            <emphasis>any</emphasis> interfaces specified
 
263
            <emphasis>after</emphasis> this string.  This is not
 
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            recommended, and only meant for advanced users.
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          </para>
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        </listitem>
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      </varlistentry>
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        >SECONDS</replaceable></option></term>
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        <listitem>
263
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          <para>
264
 
            After bringing the network interface up, the program waits
 
322
            After bringing a network interface up, the program waits
265
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            for the interface to arrive in a <quote>running</quote>
266
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            state before proceeding.  During this time, the kernel log
267
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            level will be lowered to reduce clutter on the system
271
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          </para>
272
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        </listitem>
273
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      </varlistentry>
 
332
 
 
333
      <varlistentry>
 
334
        <term><option>--retry=<replaceable
 
335
        >SECONDS</replaceable></option></term>
 
336
        <listitem>
 
337
          <para>
 
338
            All Mandos servers are tried repeatedly until a password
 
339
            is received.  This value specifies, in seconds, how long
 
340
            between each successive try <emphasis>for the same
 
341
            server</emphasis>.  The default is 10 seconds.
 
342
          </para>
 
343
        </listitem>
 
344
      </varlistentry>
 
345
 
 
346
      <varlistentry>
 
347
        <term><option>--network-hook-dir=<replaceable
 
348
        >DIR</replaceable></option></term>
 
349
        <listitem>
 
350
          <para>
 
351
            Network hook directory.  The default directory is
 
352
            <quote><filename class="directory"
 
353
            >/lib/mandos/network-hooks.d</filename></quote>.
 
354
          </para>
 
355
        </listitem>
 
356
      </varlistentry>
274
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275
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      <varlistentry>
276
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        <term><option>--debug</option></term>
337
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      <refentrytitle>plugin-runner</refentrytitle>
338
421
      <manvolnum>8mandos</manvolnum></citerefentry>) is used to run
339
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      both this program and others in in parallel,
340
 
      <emphasis>one</emphasis> of which will prompt for passwords on
341
 
      the system console.
 
423
      <emphasis>one</emphasis> of which (<citerefentry>
 
424
      <refentrytitle>password-prompt</refentrytitle>
 
425
      <manvolnum>8mandos</manvolnum></citerefentry>) will prompt for
 
426
      passwords on the system console.
342
427
    </para>
343
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  </refsect1>
344
429
  
349
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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
351
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      program will exit with a non-zero exit status only if a critical
352
 
      error occurs.  Otherwise, it will forever connect to new
353
 
      <application>Mandos</application> servers as they appear, trying
354
 
      to get a decryptable password and print it.
 
437
      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.
355
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    </para>
356
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  </refsect1>
357
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365
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    </para>
366
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  </refsect1>
367
452
  
 
453
  <refsect1 id="network-hooks">
 
454
    <title>NETWORK HOOKS</title>
 
455
    <para>
 
456
      If a network interface like a bridge or tunnel is required to
 
457
      find a Mandos server, this requires the interface to be up and
 
458
      running before <command>&COMMANDNAME;</command> starts looking
 
459
      for Mandos servers.  This can be accomplished by creating a
 
460
      <quote>network hook</quote> program, and placing it in a special
 
461
      directory.
 
462
    </para>
 
463
    <para>
 
464
      Before the network is used (and again before program exit), any
 
465
      runnable programs found in the network hook directory are run
 
466
      with the argument <quote><literal>start</literal></quote> or
 
467
      <quote><literal>stop</literal></quote>.  This should bring up or
 
468
      down, respectively, any network interface which
 
469
      <command>&COMMANDNAME;</command> should use.
 
470
    </para>
 
471
    <refsect2 id="hook-requirements">
 
472
      <title>REQUIREMENTS</title>
 
473
      <para>
 
474
        A network hook must be an executable file, and its name must
 
475
        consist entirely of upper and lower case letters, digits,
 
476
        underscores, periods, and hyphens.
 
477
      </para>
 
478
      <para>
 
479
        A network hook will receive one argument, which can be one of
 
480
        the following:
 
481
      </para>
 
482
      <variablelist>
 
483
        <varlistentry>
 
484
          <term><literal>start</literal></term>
 
485
          <listitem>
 
486
            <para>
 
487
              This should make the network hook create (if necessary)
 
488
              and bring up a network interface.
 
489
            </para>
 
490
          </listitem>
 
491
        </varlistentry>
 
492
        <varlistentry>
 
493
          <term><literal>stop</literal></term>
 
494
          <listitem>
 
495
            <para>
 
496
              This should make the network hook take down a network
 
497
              interface, and delete it if it did not exist previously.
 
498
            </para>
 
499
          </listitem>
 
500
        </varlistentry>
 
501
        <varlistentry>
 
502
          <term><literal>files</literal></term>
 
503
          <listitem>
 
504
            <para>
 
505
              This should make the network hook print, <emphasis>one
 
506
              file per line</emphasis>, all the files needed for it to
 
507
              run.  (These files will be copied into the initial RAM
 
508
              filesystem.)  Typical use is for a network hook which is
 
509
              a shell script to print its needed binaries.
 
510
            </para>
 
511
            <para>
 
512
              It is not necessary to print any non-executable files
 
513
              already in the network hook directory, these will be
 
514
              copied implicitly if they otherwise satisfy the name
 
515
              requirement.
 
516
            </para>
 
517
          </listitem>
 
518
        </varlistentry>
 
519
        <varlistentry>
 
520
          <term><literal>modules</literal></term>
 
521
          <listitem>
 
522
            <para>
 
523
              This should make the network hook print, <emphasis>on
 
524
              separate lines</emphasis>, all the kernel modules needed
 
525
              for it to run.  (These modules will be copied into the
 
526
              initial RAM filesystem.)  For instance, a tunnel
 
527
              interface needs the
 
528
              <quote><literal>tun</literal></quote> module.
 
529
            </para>
 
530
          </listitem>
 
531
        </varlistentry>
 
532
      </variablelist>
 
533
      <para>
 
534
        The network hook will be provided with a number of environment
 
535
        variables:
 
536
      </para>
 
537
      <variablelist>
 
538
        <varlistentry>
 
539
          <term><envar>MANDOSNETHOOKDIR</envar></term>
 
540
          <listitem>
 
541
            <para>
 
542
              The network hook directory, specified to
 
543
              <command>&COMMANDNAME;</command> by the
 
544
              <option>--network-hook-dir</option> option.  Note: this
 
545
              should <emphasis>always</emphasis> be used by the
 
546
              network hook to refer to itself or any files in the hook
 
547
              directory it may require.
 
548
            </para>
 
549
          </listitem>
 
550
        </varlistentry>
 
551
        <varlistentry>
 
552
          <term><envar>DEVICE</envar></term>
 
553
          <listitem>
 
554
            <para>
 
555
              The network interfaces, as specified to
 
556
              <command>&COMMANDNAME;</command> by the
 
557
              <option>--interface</option> option, combined to one
 
558
              string and separated by commas.  If this is set, and
 
559
              does not contain the interface a hook will bring up,
 
560
              there is no reason for a hook to continue.
 
561
            </para>
 
562
          </listitem>
 
563
        </varlistentry>
 
564
        <varlistentry>
 
565
          <term><envar>MODE</envar></term>
 
566
          <listitem>
 
567
            <para>
 
568
              This will be the same as the first argument;
 
569
              i.e. <quote><literal>start</literal></quote>,
 
570
              <quote><literal>stop</literal></quote>,
 
571
              <quote><literal>files</literal></quote>, or
 
572
              <quote><literal>modules</literal></quote>.
 
573
            </para>
 
574
          </listitem>
 
575
        </varlistentry>
 
576
        <varlistentry>
 
577
          <term><envar>VERBOSITY</envar></term>
 
578
          <listitem>
 
579
            <para>
 
580
              This will be the <quote><literal>1</literal></quote> if
 
581
              the <option>--debug</option> option is passed to
 
582
              <command>&COMMANDNAME;</command>, otherwise
 
583
              <quote><literal>0</literal></quote>.
 
584
            </para>
 
585
          </listitem>
 
586
        </varlistentry>
 
587
        <varlistentry>
 
588
          <term><envar>DELAY</envar></term>
 
589
          <listitem>
 
590
            <para>
 
591
              This will be the same as the <option>--delay</option>
 
592
              option passed to <command>&COMMANDNAME;</command>.  Is
 
593
              only set if <envar>MODE</envar> is
 
594
              <quote><literal>start</literal></quote> or
 
595
              <quote><literal>stop</literal></quote>.
 
596
            </para>
 
597
          </listitem>
 
598
        </varlistentry>
 
599
        <varlistentry>
 
600
          <term><envar>CONNECT</envar></term>
 
601
          <listitem>
 
602
            <para>
 
603
              This will be the same as the <option>--connect</option>
 
604
              option passed to <command>&COMMANDNAME;</command>.  Is
 
605
              only set if <option>--connect</option> is passed and
 
606
              <envar>MODE</envar> is
 
607
              <quote><literal>start</literal></quote> or
 
608
              <quote><literal>stop</literal></quote>.
 
609
            </para>
 
610
          </listitem>
 
611
        </varlistentry>
 
612
      </variablelist>
 
613
      <para>
 
614
        A hook may not read from standard input, and should be
 
615
        restrictive in printing to standard output or standard error
 
616
        unless <varname>VERBOSITY</varname> is
 
617
        <quote><literal>1</literal></quote>.
 
618
      </para>
 
619
    </refsect2>
 
620
  </refsect1>
 
621
  
368
622
  <refsect1 id="files">
369
623
    <title>FILES</title>
370
624
    <variablelist>
382
636
          </para>
383
637
        </listitem>
384
638
      </varlistentry>
 
639
      <varlistentry>
 
640
        <term><filename
 
641
        class="directory">/lib/mandos/network-hooks.d</filename></term>
 
642
        <listitem>
 
643
          <para>
 
644
            Directory where network hooks are located.  Change this
 
645
            with the <option>--network-hook-dir</option> option.  See
 
646
            <xref linkend="network-hooks"/>.
 
647
          </para>
 
648
        </listitem>
 
649
      </varlistentry>
385
650
    </variablelist>
386
651
  </refsect1>
387
652
  
402
667
    <informalexample>
403
668
      <para>
404
669
        Normal invocation needs no options, if the network interface
405
 
        is <quote>eth0</quote>:
 
670
        can be automatically determined:
406
671
      </para>
407
672
      <para>
408
673
        <userinput>&COMMANDNAME;</userinput>
432
697
    <informalexample>
433
698
      <para>
434
699
        Run in debug mode, with a custom key, and do not use Zeroconf
435
 
        to locate a server; connect directly to the IPv6 address
436
 
        <quote><systemitem class="ipaddress"
437
 
        >2001:db8:f983:bd0b:30de:ae4a:71f2:f672</systemitem></quote>,
438
 
        port 4711, using interface eth2:
 
700
        to locate a server; connect directly to the IPv6 link-local
 
701
        address <quote><systemitem class="ipaddress"
 
702
        >fe80::aede:48ff:fe71:f6f2</systemitem></quote>, port 4711,
 
703
        using interface eth2:
439
704
      </para>
440
705
      <para>
441
706
 
442
707
<!-- do not wrap this line -->
443
 
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --connect 2001:db8:f983:bd0b:30de:ae4a:71f2:f672:4711 --interface eth2</userinput>
 
708
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --connect fe80::aede:48ff:fe71:f6f2:4711 --interface eth2</userinput>
444
709
 
445
710
      </para>
446
711
    </informalexample>
496
761
  <refsect1 id="see_also">
497
762
    <title>SEE ALSO</title>
498
763
    <para>
 
764
      <citerefentry><refentrytitle>intro</refentrytitle>
 
765
      <manvolnum>8mandos</manvolnum></citerefentry>,
499
766
      <citerefentry><refentrytitle>cryptsetup</refentrytitle>
500
767
      <manvolnum>8</manvolnum></citerefentry>,
501
768
      <citerefentry><refentrytitle>crypttab</refentrytitle>