To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.xml
- browse files at revision 411
- compare with another revision
- download diff
- download tarball
- view history from revision 411
- Committer: Teddy Hogeborn
- Date: 2024-09-12 17:10:51 UTC
- Revision ID: teddy@recompile.se-20240912171051-2f9urnb4e8zdttgf
Tags: version-1.8.17-1
Version 1.8.17-1
* Makefile (version): Change to "1.8.17".
* NEWS (Version 1.8.17): Add new entry.
* debian/changelog (1.8.17-1): - '' -
* Makefile (version): Change to "1.8.17".
* NEWS (Version 1.8.17): Add new entry.
* debian/changelog (1.8.17-1): - '' -
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.xml
2
2
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3
3
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4
4
<!ENTITY COMMANDNAME "mandos-client">
5
<!ENTITY TIMESTAMP "2013-10-20">
5
<!ENTITY TIMESTAMP "2023-10-21">
6
6
<!ENTITY % common SYSTEM "../common.ent">
7
7
%common;
8
8
]>
33
33
<copyright>
34
34
<year>2008</year>
35
35
<year>2009</year>
36
<year>2010</year>
37
<year>2011</year>
36
38
<year>2012</year>
37
39
<year>2013</year>
40
<year>2014</year>
41
<year>2015</year>
42
<year>2016</year>
43
<year>2017</year>
44
<year>2018</year>
45
<year>2019</year>
38
46
<holder>Teddy Hogeborn</holder>
39
47
<holder>Björn Påhlsson</holder>
40
48
</copyright>
88
96
<replaceable>FILE</replaceable></option></arg>
89
97
</group>
90
98
<sbr/>
99
<group>
100
<arg choice="plain"><option>--tls-privkey
101
<replaceable>FILE</replaceable></option></arg>
102
<arg choice="plain"><option>-t
103
<replaceable>FILE</replaceable></option></arg>
104
</group>
105
<sbr/>
106
<group>
107
<arg choice="plain"><option>--tls-pubkey
108
<replaceable>FILE</replaceable></option></arg>
109
<arg choice="plain"><option>-T
110
<replaceable>FILE</replaceable></option></arg>
111
</group>
112
<sbr/>
91
113
<arg>
92
114
<option>--priority <replaceable>STRING</replaceable></option>
93
115
</arg>
97
119
</arg>
98
120
<sbr/>
99
121
<arg>
122
<option>--dh-params <replaceable>FILE</replaceable></option>
123
</arg>
124
<sbr/>
125
<arg>
100
126
<option>--delay <replaceable>SECONDS</replaceable></option>
101
127
</arg>
102
128
<sbr/>
143
169
brings up network interfaces, uses the interfaces’ IPv6
144
170
link-local addresses to get network connectivity, uses Zeroconf
145
171
to find servers on the local network, and communicates with
146
servers using TLS with an OpenPGP key to ensure authenticity and
147
confidentiality. This client program keeps running, trying all
148
servers on the network, until it receives a satisfactory reply
149
or a TERM signal. After all servers have been tried, all
172
servers using TLS with a raw public key to ensure authenticity
173
and confidentiality. This client program keeps running, trying
174
all servers on the network, until it receives a satisfactory
175
reply or a TERM signal. After all servers have been tried, all
150
176
servers are periodically retried. If no servers are found it
151
177
will wait indefinitely for new servers to appear.
152
178
</para>
170
196
</para>
171
197
<para>
172
198
This program is not meant to be run directly; it is really meant
173
to run as a plugin of the <application>Mandos</application>
174
<citerefentry><refentrytitle>plugin-runner</refentrytitle>
175
<manvolnum>8mandos</manvolnum></citerefentry>, which runs in the
176
initial <acronym>RAM</acronym> disk environment because it is
177
specified as a <quote>keyscript</quote> in the <citerefentry>
178
<refentrytitle>crypttab</refentrytitle><manvolnum>5</manvolnum>
179
</citerefentry> file.
199
to be run by other programs in the initial
200
<acronym>RAM</acronym> disk environment; see <xref
201
linkend="overview"/>.
180
202
</para>
181
203
</refsect1>
182
204
194
216
<title>OPTIONS</title>
195
217
<para>
196
218
This program is commonly not invoked from the command line; it
197
is normally started by the <application>Mandos</application>
198
plugin runner, see <citerefentry><refentrytitle
199
>plugin-runner</refentrytitle><manvolnum>8mandos</manvolnum>
200
</citerefentry>. Any command line options this program accepts
201
are therefore normally provided by the plugin runner, and not
202
directly.
219
is normally started by another program as described in <xref
220
linkend="description"/>. Any command line options this program
221
accepts are therefore normally provided by the invoking program,
222
and not directly.
203
223
</para>
204
224
205
225
<variablelist>
219
239
assumed to separate the address from the port number.
220
240
</para>
221
241
<para>
222
This option is normally only useful for testing and
223
debugging.
242
Normally, Zeroconf would be used to locate Mandos servers,
243
in which case this option would only be used when testing
244
and debugging.
224
245
</para>
225
246
</listitem>
226
247
</varlistentry>
259
280
<para>
260
281
<replaceable>NAME</replaceable> can be the string
261
282
<quote><literal>none</literal></quote>; this will make
262
<command>&COMMANDNAME;</command> not bring up
263
<emphasis>any</emphasis> interfaces specified
264
<emphasis>after</emphasis> this string. This is not
265
recommended, and only meant for advanced users.
283
<command>&COMMANDNAME;</command> only bring up interfaces
284
specified <emphasis>before</emphasis> this string. This
285
is not recommended, and only meant for advanced users.
266
286
</para>
267
287
</listitem>
268
288
</varlistentry>
296
316
</varlistentry>
297
317
298
318
<varlistentry>
319
<term><option>--tls-pubkey=<replaceable
320
>FILE</replaceable></option></term>
321
<term><option>-T
322
<replaceable>FILE</replaceable></option></term>
323
<listitem>
324
<para>
325
TLS raw public key file name. The default name is
326
<quote><filename>/conf/conf.d/mandos/tls-pubkey.pem</filename
327
></quote>.
328
</para>
329
</listitem>
330
</varlistentry>
331
332
<varlistentry>
333
<term><option>--tls-privkey=<replaceable
334
>FILE</replaceable></option></term>
335
<term><option>-t
336
<replaceable>FILE</replaceable></option></term>
337
<listitem>
338
<para>
339
TLS secret key file name. The default name is
340
<quote><filename>/conf/conf.d/mandos/tls-privkey.pem</filename
341
></quote>.
342
</para>
343
</listitem>
344
</varlistentry>
345
346
<varlistentry>
299
347
<term><option>--priority=<replaceable
300
348
>STRING</replaceable></option></term>
301
349
<listitem>
310
358
<listitem>
311
359
<para>
312
360
Sets the number of bits to use for the prime number in the
313
TLS Diffie-Hellman key exchange. Default is 1024.
361
TLS Diffie-Hellman key exchange. The default value is
362
selected automatically based on the GnuTLS security
363
profile set in its priority string. Note that if the
364
<option>--dh-params</option> option is used, the values
365
from that file will be used instead.
366
</para>
367
</listitem>
368
</varlistentry>
369
370
<varlistentry>
371
<term><option>--dh-params=<replaceable
372
>FILE</replaceable></option></term>
373
<listitem>
374
<para>
375
Specifies a PEM-encoded PKCS#3 file to read the parameters
376
needed by the TLS Diffie-Hellman key exchange from. If
377
this option is not given, or if the file for some reason
378
could not be used, the parameters will be generated on
379
startup, which will take some time and processing power.
380
Those using servers running under time, power or processor
381
constraints may want to generate such a file in advance
382
and use this option.
314
383
</para>
315
384
</listitem>
316
385
</varlistentry>
407
476
<title>OVERVIEW</title>
408
477
<xi:include href="../overview.xml"/>
409
478
<para>
410
This program is the client part. It is a plugin started by
411
<citerefentry><refentrytitle>plugin-runner</refentrytitle>
412
<manvolnum>8mandos</manvolnum></citerefentry> which will run in
413
an initial <acronym>RAM</acronym> disk environment.
479
This program is the client part. It is run automatically in an
480
initial <acronym>RAM</acronym> disk environment.
481
</para>
482
<para>
483
In an initial <acronym>RAM</acronym> disk environment using
484
<citerefentry><refentrytitle>systemd</refentrytitle>
485
<manvolnum>1</manvolnum></citerefentry>, this program is started
486
by the <application>Mandos</application> <citerefentry>
487
<refentrytitle>password-agent</refentrytitle>
488
<manvolnum>8mandos</manvolnum></citerefentry>, which in turn is
489
started automatically by the <citerefentry>
490
<refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum>
491
</citerefentry> <quote>Password Agent</quote> system.
492
</para>
493
<para>
494
In the case of a non-<citerefentry>
495
<refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum>
496
</citerefentry> environment, this program is started as a plugin
497
of the <application>Mandos</application> <citerefentry>
498
<refentrytitle>plugin-runner</refentrytitle>
499
<manvolnum>8mandos</manvolnum></citerefentry>, which runs in the
500
initial <acronym>RAM</acronym> disk environment because it is
501
specified as a <quote>keyscript</quote> in the <citerefentry>
502
<refentrytitle>crypttab</refentrytitle><manvolnum>5</manvolnum>
503
</citerefentry> file.
414
504
</para>
415
505
<para>
416
506
This program could, theoretically, be used as a keyscript in
417
507
<filename>/etc/crypttab</filename>, but it would then be
418
508
impossible to enter a password for the encrypted root disk at
419
509
the console, since this program does not read from the console
420
at all. This is why a separate plugin runner (<citerefentry>
421
<refentrytitle>plugin-runner</refentrytitle>
422
<manvolnum>8mandos</manvolnum></citerefentry>) is used to run
423
both this program and others in in parallel,
424
<emphasis>one</emphasis> of which (<citerefentry>
425
<refentrytitle>password-prompt</refentrytitle>
426
<manvolnum>8mandos</manvolnum></citerefentry>) will prompt for
427
passwords on the system console.
510
at all.
428
511
</para>
429
512
</refsect1>
430
513
443
526
444
527
<refsect1 id="environment">
445
528
<title>ENVIRONMENT</title>
529
<variablelist>
530
<varlistentry>
531
<term><envar>MANDOSPLUGINHELPERDIR</envar></term>
532
<listitem>
533
<para>
534
This environment variable will be assumed to contain the
535
directory containing any helper executables. The use and
536
nature of these helper executables, if any, is purposely
537
not documented.
538
</para>
539
</listitem>
540
</varlistentry>
541
</variablelist>
446
542
<para>
447
This program does not use any environment variables, not even
448
the ones provided by <citerefentry><refentrytitle
543
This program does not use any other environment variables, not
544
even the ones provided by <citerefentry><refentrytitle
449
545
>cryptsetup</refentrytitle><manvolnum>8</manvolnum>
450
546
</citerefentry>.
451
547
</para>
638
734
</listitem>
639
735
</varlistentry>
640
736
<varlistentry>
737
<term><filename>/conf/conf.d/mandos/tls-pubkey.pem</filename
738
></term>
739
<term><filename>/conf/conf.d/mandos/tls-privkey.pem</filename
740
></term>
741
<listitem>
742
<para>
743
Public and private raw key files, in <quote>PEM</quote>
744
format. These are the default file names, they can be
745
changed with the <option>--tls-pubkey</option> and
746
<option>--tls-privkey</option> options.
747
</para>
748
</listitem>
749
</varlistentry>
750
<varlistentry>
641
751
<term><filename
642
752
class="directory">/lib/mandos/network-hooks.d</filename></term>
643
753
<listitem>
651
761
</variablelist>
652
762
</refsect1>
653
763
654
<!-- <refsect1 id="bugs"> -->
655
<!-- <title>BUGS</title> -->
656
<!-- <para> -->
657
<!-- </para> -->
658
<!-- </refsect1> -->
764
<refsect1 id="bugs">
765
<title>BUGS</title>
766
<xi:include href="../bugs.xml"/>
767
</refsect1>
659
768
660
769
<refsect1 id="example">
661
770
<title>EXAMPLE</title>
662
771
<para>
663
772
Note that normally, command line options will not be given
664
directly, but via options for the Mandos <citerefentry
665
><refentrytitle>plugin-runner</refentrytitle>
666
<manvolnum>8mandos</manvolnum></citerefentry>.
773
directly, but passed on via the program responsible for starting
774
this program; see <xref linkend="overview"/>.
667
775
</para>
668
776
<informalexample>
669
777
<para>
686
794
</informalexample>
687
795
<informalexample>
688
796
<para>
689
Run in debug mode, and use a custom key:
797
Run in debug mode, and use custom keys:
690
798
</para>
691
799
<para>
692
800
693
801
<!-- do not wrap this line -->
694
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt</userinput>
802
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --tls-pubkey keydir/tls-pubkey.pem --tls-privkey keydir/tls-privkey.pem</userinput>
695
803
696
804
</para>
697
805
</informalexample>
698
806
<informalexample>
699
807
<para>
700
Run in debug mode, with a custom key, and do not use Zeroconf
808
Run in debug mode, with custom keys, and do not use Zeroconf
701
809
to locate a server; connect directly to the IPv6 link-local
702
810
address <quote><systemitem class="ipaddress"
703
811
>fe80::aede:48ff:fe71:f6f2</systemitem></quote>, port 4711,
706
814
<para>
707
815
708
816
<!-- 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>
817
<userinput>&COMMANDNAME; --debug --pubkey keydir/pubkey.txt --seckey keydir/seckey.txt --tls-pubkey keydir/tls-pubkey.pem --tls-privkey keydir/tls-privkey.pem --connect fe80::aede:48ff:fe71:f6f2:4711 --interface eth2</userinput>
710
818
711
819
</para>
712
820
</informalexample>
715
823
<refsect1 id="security">
716
824
<title>SECURITY</title>
717
825
<para>
718
This program is set-uid to root, but will switch back to the
719
original (and presumably non-privileged) user and group after
720
bringing up the network interface.
826
This program assumes that it is set-uid to root, and will switch
827
back to the original (and presumably non-privileged) user and
828
group after bringing up the network interface.
721
829
</para>
722
830
<para>
723
831
To use this program for its intended purpose (see <xref
736
844
<para>
737
845
The only remaining weak point is that someone with physical
738
846
access to the client hard drive might turn off the client
739
computer, read the OpenPGP keys directly from the hard drive,
740
and communicate with the server. To safeguard against this, the
741
server is supposed to notice the client disappearing and stop
742
giving out the encrypted data. Therefore, it is important to
743
set the timeout and checker interval values tightly on the
744
server. See <citerefentry><refentrytitle
847
computer, read the OpenPGP and TLS keys directly from the hard
848
drive, and communicate with the server. To safeguard against
849
this, the server is supposed to notice the client disappearing
850
and stop giving out the encrypted data. Therefore, it is
851
important to set the timeout and checker interval values tightly
852
on the server. See <citerefentry><refentrytitle
745
853
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
746
854
</para>
747
855
<para>
748
856
It will also help if the checker program on the server is
749
857
configured to request something from the client which can not be
750
spoofed by someone else on the network, unlike unencrypted
751
<acronym>ICMP</acronym> echo (<quote>ping</quote>) replies.
858
spoofed by someone else on the network, like SSH server key
859
fingerprints, and unlike unencrypted <acronym>ICMP</acronym>
860
echo (<quote>ping</quote>) replies.
752
861
</para>
753
862
<para>
754
863
<emphasis>Note</emphasis>: This makes it completely insecure to
770
879
<manvolnum>5</manvolnum></citerefentry>,
771
880
<citerefentry><refentrytitle>mandos</refentrytitle>
772
881
<manvolnum>8</manvolnum></citerefentry>,
773
<citerefentry><refentrytitle>password-prompt</refentrytitle>
882
<citerefentry><refentrytitle>password-agent</refentrytitle>
774
883
<manvolnum>8mandos</manvolnum></citerefentry>,
775
884
<citerefentry><refentrytitle>plugin-runner</refentrytitle>
776
885
<manvolnum>8mandos</manvolnum></citerefentry>
789
898
</varlistentry>
790
899
<varlistentry>
791
900
<term>
792
<ulink url="http://www.avahi.org/">Avahi</ulink>
901
<ulink url="https://www.avahi.org/">Avahi</ulink>
793
902
</term>
794
903
<listitem>
795
904
<para>
800
909
</varlistentry>
801
910
<varlistentry>
802
911
<term>
803
<ulink url="http://www.gnu.org/software/gnutls/"
804
>GnuTLS</ulink>
912
<ulink url="https://www.gnutls.org/">GnuTLS</ulink>
805
913
</term>
806
914
<listitem>
807
915
<para>
808
916
GnuTLS is the library this client uses to implement TLS for
809
917
communicating securely with the server, and at the same time
810
send the public OpenPGP key to the server.
918
send the public key to the server.
811
919
</para>
812
920
</listitem>
813
921
</varlistentry>
814
922
<varlistentry>
815
923
<term>
816
<ulink url="http://www.gnupg.org/related_software/gpgme/"
924
<ulink url="https://www.gnupg.org/related_software/gpgme/"
817
925
>GPGME</ulink>
818
926
</term>
819
927
<listitem>
857
965
</varlistentry>
858
966
<varlistentry>
859
967
<term>
860
RFC 4346: <citetitle>The Transport Layer Security (TLS)
861
Protocol Version 1.1</citetitle>
968
RFC 5246: <citetitle>The Transport Layer Security (TLS)
969
Protocol Version 1.2</citetitle>
862
970
</term>
863
971
<listitem>
864
972
<para>
865
TLS 1.1 is the protocol implemented by GnuTLS.
973
TLS 1.2 is the protocol implemented by GnuTLS.
866
974
</para>
867
975
</listitem>
868
976
</varlistentry>
879
987
</varlistentry>
880
988
<varlistentry>
881
989
<term>
882
RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
990
RFC 7250: <citetitle>Using Raw Public Keys in Transport
991
Layer Security (TLS) and Datagram Transport Layer Security
992
(DTLS)</citetitle>
993
</term>
994
<listitem>
995
<para>
996
This is implemented by GnuTLS in version 3.6.6 and is, if
997
present, used by this program so that raw public keys can be
998
used.
999
</para>
1000
</listitem>
1001
</varlistentry>
1002
<varlistentry>
1003
<term>
1004
RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
883
1005
Security</citetitle>
884
1006
</term>
885
1007
<listitem>
886
1008
<para>
887
This is implemented by GnuTLS and used by this program so
888
that OpenPGP keys can be used.
1009
This is implemented by GnuTLS before version 3.6.0 and is,
1010
if present, used by this program so that OpenPGP keys can be
1011
used.
889
1012
</para>
890
1013
</listitem>
891
1014
</varlistentry>
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0