To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos.xml
- browse files at revision 1206
- compare with another revision
- download diff
- download tarball
- view history from revision 1206
- Committer: teddy at recompile
- Date: 2020-02-09 03:42:50 UTC
- Revision ID: teddy@recompile.se-20200209034250-dxkkuq0eevnzk8py
Update formatting in TODO file
* TODO: Add markup, links and a file-wide tag.
* TODO: Add markup, links and a file-wide tag.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos.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">
5
<!ENTITY TIMESTAMP "2008-10-03">
5
<!ENTITY TIMESTAMP "2019-07-24">
6
6
<!ENTITY % common SYSTEM "common.ent">
7
7
%common;
8
8
]>
19
19
<firstname>Björn</firstname>
20
20
<surname>Påhlsson</surname>
21
21
<address>
22
<email>belorn@fukt.bsnet.se</email>
22
<email>belorn@recompile.se</email>
23
23
</address>
24
24
</author>
25
25
<author>
26
26
<firstname>Teddy</firstname>
27
27
<surname>Hogeborn</surname>
28
28
<address>
29
<email>teddy@fukt.bsnet.se</email>
29
<email>teddy@recompile.se</email>
30
30
</address>
31
31
</author>
32
32
</authorgroup>
33
33
<copyright>
34
34
<year>2008</year>
35
<year>2009</year>
36
<year>2010</year>
37
<year>2011</year>
38
<year>2012</year>
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>
35
46
<holder>Teddy Hogeborn</holder>
36
47
<holder>Björn Påhlsson</holder>
37
48
</copyright>
84
95
<replaceable>DIRECTORY</replaceable></option></arg>
85
96
<sbr/>
86
97
<arg><option>--debug</option></arg>
98
<sbr/>
99
<arg><option>--debuglevel
100
<replaceable>LEVEL</replaceable></option></arg>
101
<sbr/>
102
<arg><option>--no-dbus</option></arg>
103
<sbr/>
104
<arg><option>--no-ipv6</option></arg>
105
<sbr/>
106
<arg><option>--no-restore</option></arg>
107
<sbr/>
108
<arg><option>--statedir
109
<replaceable>DIRECTORY</replaceable></option></arg>
110
<sbr/>
111
<arg><option>--socket
112
<replaceable>FD</replaceable></option></arg>
113
<sbr/>
114
<arg><option>--foreground</option></arg>
115
<sbr/>
116
<arg><option>--no-zeroconf</option></arg>
87
117
</cmdsynopsis>
88
118
<cmdsynopsis>
89
119
<command>&COMMANDNAME;</command>
107
137
<para>
108
138
<command>&COMMANDNAME;</command> is a server daemon which
109
139
handles incoming request for passwords for a pre-defined list of
110
client host computers. The Mandos server uses Zeroconf to
111
announce itself on the local network, and uses TLS to
112
communicate securely with and to authenticate the clients. The
113
Mandos server uses IPv6 to allow Mandos clients to use IPv6
114
link-local addresses, since the clients will probably not have
115
any other addresses configured (see <xref linkend="overview"/>).
116
Any authenticated client is then given the stored pre-encrypted
117
password for that specific client.
140
client host computers. For an introduction, see
141
<citerefentry><refentrytitle>intro</refentrytitle>
142
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
143
uses Zeroconf to announce itself on the local network, and uses
144
TLS to communicate securely with and to authenticate the
145
clients. The Mandos server uses IPv6 to allow Mandos clients to
146
use IPv6 link-local addresses, since the clients will probably
147
not have any other addresses configured (see <xref
148
linkend="overview"/>). Any authenticated client is then given
149
the stored pre-encrypted password for that specific client.
118
150
</para>
119
151
</refsect1>
120
152
189
221
</varlistentry>
190
222
191
223
<varlistentry>
224
<term><option>--debuglevel
225
<replaceable>LEVEL</replaceable></option></term>
226
<listitem>
227
<para>
228
Set the debugging log level.
229
<replaceable>LEVEL</replaceable> is a string, one of
230
<quote><literal>CRITICAL</literal></quote>,
231
<quote><literal>ERROR</literal></quote>,
232
<quote><literal>WARNING</literal></quote>,
233
<quote><literal>INFO</literal></quote>, or
234
<quote><literal>DEBUG</literal></quote>, in order of
235
increasing verbosity. The default level is
236
<quote><literal>WARNING</literal></quote>.
237
</para>
238
</listitem>
239
</varlistentry>
240
241
<varlistentry>
192
242
<term><option>--priority <replaceable>
193
243
PRIORITY</replaceable></option></term>
194
244
<listitem>
228
278
</para>
229
279
</listitem>
230
280
</varlistentry>
281
282
<varlistentry>
283
<term><option>--no-dbus</option></term>
284
<listitem>
285
<xi:include href="mandos-options.xml" xpointer="dbus"/>
286
<para>
287
See also <xref linkend="dbus_interface"/>.
288
</para>
289
</listitem>
290
</varlistentry>
291
292
<varlistentry>
293
<term><option>--no-ipv6</option></term>
294
<listitem>
295
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
296
</listitem>
297
</varlistentry>
298
299
<varlistentry>
300
<term><option>--no-restore</option></term>
301
<listitem>
302
<xi:include href="mandos-options.xml" xpointer="restore"/>
303
<para>
304
See also <xref linkend="persistent_state"/>.
305
</para>
306
</listitem>
307
</varlistentry>
308
309
<varlistentry>
310
<term><option>--statedir
311
<replaceable>DIRECTORY</replaceable></option></term>
312
<listitem>
313
<xi:include href="mandos-options.xml" xpointer="statedir"/>
314
</listitem>
315
</varlistentry>
316
317
<varlistentry>
318
<term><option>--socket
319
<replaceable>FD</replaceable></option></term>
320
<listitem>
321
<xi:include href="mandos-options.xml" xpointer="socket"/>
322
</listitem>
323
</varlistentry>
324
325
<varlistentry>
326
<term><option>--foreground</option></term>
327
<listitem>
328
<xi:include href="mandos-options.xml"
329
xpointer="foreground"/>
330
</listitem>
331
</varlistentry>
332
333
<varlistentry>
334
<term><option>--no-zeroconf</option></term>
335
<listitem>
336
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
337
</listitem>
338
</varlistentry>
339
231
340
</variablelist>
232
341
</refsect1>
233
342
253
362
start a TLS protocol handshake with a slight quirk: the Mandos
254
363
server program acts as a TLS <quote>client</quote> while the
255
364
connecting Mandos client acts as a TLS <quote>server</quote>.
256
The Mandos client must supply an OpenPGP certificate, and the
257
fingerprint of this certificate is used by the Mandos server to
258
look up (in a list read from <filename>clients.conf</filename>
259
at start time) which binary blob to give the client. No other
260
authentication or authorization is done by the server.
365
The Mandos client must supply a TLS public key, and the key ID
366
of this public key is used by the Mandos server to look up (in a
367
list read from <filename>clients.conf</filename> at start time)
368
which binary blob to give the client. No other authentication
369
or authorization is done by the server.
261
370
</para>
262
371
<table>
263
372
<title>Mandos Protocol (Version 1)</title><tgroup cols="3"><thead>
283
392
</emphasis></entry>
284
393
</row>
285
394
<row>
286
<entry>OpenPGP public key (part of TLS handshake)</entry>
395
<entry>Public key (part of TLS handshake)</entry>
287
396
<entry>-><!-- → --></entry>
288
397
</row>
289
398
<row>
305
414
The server will, by default, continually check that the clients
306
415
are still up. If a client has not been confirmed as being up
307
416
for some time, the client is assumed to be compromised and is no
308
longer eligible to receive the encrypted password. The timeout,
309
checker program, and interval between checks can be configured
310
both globally and per client; see <citerefentry>
417
longer eligible to receive the encrypted password. (Manual
418
intervention is required to re-enable a client.) The timeout,
419
extended timeout, checker program, and interval between checks
420
can be configured both globally and per client; see
421
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
422
<manvolnum>5</manvolnum></citerefentry>.
423
</para>
424
</refsect1>
425
426
<refsect1 id="approval">
427
<title>APPROVAL</title>
428
<para>
429
The server can be configured to require manual approval for a
430
client before it is sent its secret. The delay to wait for such
431
approval and the default action (approve or deny) can be
432
configured both globally and per client; see <citerefentry>
311
433
<refentrytitle>mandos-clients.conf</refentrytitle>
312
<manvolnum>5</manvolnum></citerefentry>.
313
</para>
434
<manvolnum>5</manvolnum></citerefentry>. By default all clients
435
will be approved immediately without delay.
436
</para>
437
<para>
438
This can be used to deny a client its secret if not manually
439
approved within a specified time. It can also be used to make
440
the server delay before giving a client its secret, allowing
441
optional manual denying of this specific client.
442
</para>
443
314
444
</refsect1>
315
445
316
446
<refsect1 id="logging">
317
447
<title>LOGGING</title>
318
448
<para>
319
449
The server will send log message with various severity levels to
320
<filename>/dev/log</filename>. With the
450
<filename class="devicefile">/dev/log</filename>. With the
321
451
<option>--debug</option> option, it will log even more messages,
322
452
and also show them on the console.
323
453
</para>
324
454
</refsect1>
325
455
456
<refsect1 id="persistent_state">
457
<title>PERSISTENT STATE</title>
458
<para>
459
Client settings, initially read from
460
<filename>clients.conf</filename>, are persistent across
461
restarts, and run-time changes will override settings in
462
<filename>clients.conf</filename>. However, if a setting is
463
<emphasis>changed</emphasis> (or a client added, or removed) in
464
<filename>clients.conf</filename>, this will take precedence.
465
</para>
466
</refsect1>
467
468
<refsect1 id="dbus_interface">
469
<title>D-BUS INTERFACE</title>
470
<para>
471
The server will by default provide a D-Bus system bus interface.
472
This interface will only be accessible by the root user or a
473
Mandos-specific user, if such a user exists. For documentation
474
of the D-Bus API, see the file <filename>DBUS-API</filename>.
475
</para>
476
</refsect1>
477
326
478
<refsect1 id="exit_status">
327
479
<title>EXIT STATUS</title>
328
480
<para>
380
532
</listitem>
381
533
</varlistentry>
382
534
<varlistentry>
383
<term><filename>/var/run/mandos.pid</filename></term>
384
<listitem>
385
<para>
386
The file containing the process id of
387
<command>&COMMANDNAME;</command>.
388
</para>
389
</listitem>
390
</varlistentry>
391
<varlistentry>
392
<term><filename>/dev/log</filename></term>
535
<term><filename>/run/mandos.pid</filename></term>
536
<listitem>
537
<para>
538
The file containing the process id of the
539
<command>&COMMANDNAME;</command> process started last.
540
<emphasis >Note:</emphasis> If the <filename
541
class="directory">/run</filename> directory does not
542
exist, <filename>/var/run/mandos.pid</filename> will be
543
used instead.
544
</para>
545
</listitem>
546
</varlistentry>
547
<varlistentry>
548
<term><filename
549
class="directory">/var/lib/mandos</filename></term>
550
<listitem>
551
<para>
552
Directory where persistent state will be saved. Change
553
this with the <option>--statedir</option> option. See
554
also the <option>--no-restore</option> option.
555
</para>
556
</listitem>
557
</varlistentry>
558
<varlistentry>
559
<term><filename class="devicefile">/dev/log</filename></term>
393
560
<listitem>
394
561
<para>
395
562
The Unix domain socket to where local syslog messages are
418
585
backtrace. This could be considered a feature.
419
586
</para>
420
587
<para>
421
Currently, if a client is declared <quote>invalid</quote> due to
422
having timed out, the server does not record this fact onto
423
permanent storage. This has some security implications, see
424
<xref linkend="clients"/>.
425
</para>
426
<para>
427
There is currently no way of querying the server of the current
428
status of clients, other than analyzing its <systemitem
429
class="service">syslog</systemitem> output.
430
</para>
431
<para>
432
588
There is no fine-grained control over logging and debug output.
433
589
</para>
434
<para>
435
Debug mode is conflated with running in the foreground.
436
</para>
437
<para>
438
The console log messages does not show a time stamp.
439
</para>
440
<para>
441
This server does not check the expire time of clients’ OpenPGP
442
keys.
443
</para>
590
<xi:include href="bugs.xml"/>
444
591
</refsect1>
445
592
446
593
<refsect1 id="example">
456
603
<informalexample>
457
604
<para>
458
605
Run the server in debug mode, read configuration files from
459
the <filename>~/mandos</filename> directory, and use the
460
Zeroconf service name <quote>Test</quote> to not collide with
461
any other official Mandos server on this host:
606
the <filename class="directory">~/mandos</filename> directory,
607
and use the Zeroconf service name <quote>Test</quote> to not
608
collide with any other official Mandos server on this host:
462
609
</para>
463
610
<para>
464
611
496
643
<title>CLIENTS</title>
497
644
<para>
498
645
The server only gives out its stored data to clients which
499
does have the OpenPGP key of the stored fingerprint. This is
500
guaranteed by the fact that the client sends its OpenPGP
501
public key in the TLS handshake; this ensures it to be
502
genuine. The server computes the fingerprint of the key
503
itself and looks up the fingerprint in its list of
504
clients. The <filename>clients.conf</filename> file (see
646
does have the correct key ID of the stored key ID. This is
647
guaranteed by the fact that the client sends its public key in
648
the TLS handshake; this ensures it to be genuine. The server
649
computes the key ID of the key itself and looks up the key ID
650
in its list of clients. The <filename>clients.conf</filename>
651
file (see
505
652
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
506
653
<manvolnum>5</manvolnum></citerefentry>)
507
654
<emphasis>must</emphasis> be made non-readable by anyone
513
660
compromised if they are gone for too long.
514
661
</para>
515
662
<para>
516
If a client is compromised, its downtime should be duly noted
517
by the server which would therefore declare the client
518
invalid. But if the server was ever restarted, it would
519
re-read its client list from its configuration file and again
520
regard all clients therein as valid, and hence eligible to
521
receive their passwords. Therefore, be careful when
522
restarting servers if it is suspected that a client has, in
523
fact, been compromised by parties who may now be running a
524
fake Mandos client with the keys from the non-encrypted
525
initial <acronym>RAM</acronym> image of the client host. What
526
should be done in that case (if restarting the server program
527
really is necessary) is to stop the server program, edit the
528
configuration file to omit any suspect clients, and restart
529
the server program.
530
</para>
531
<para>
532
663
For more details on client-side security, see
533
664
<citerefentry><refentrytitle>mandos-client</refentrytitle>
534
665
<manvolnum>8mandos</manvolnum></citerefentry>.
539
670
<refsect1 id="see_also">
540
671
<title>SEE ALSO</title>
541
672
<para>
542
<citerefentry>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>mandos.conf</refentrytitle>
546
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
547
<refentrytitle>mandos-client</refentrytitle>
548
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
549
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
550
</citerefentry>
673
<citerefentry><refentrytitle>intro</refentrytitle>
674
<manvolnum>8mandos</manvolnum></citerefentry>,
675
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
676
<manvolnum>5</manvolnum></citerefentry>,
677
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
678
<manvolnum>5</manvolnum></citerefentry>,
679
<citerefentry><refentrytitle>mandos-client</refentrytitle>
680
<manvolnum>8mandos</manvolnum></citerefentry>,
681
<citerefentry><refentrytitle>sh</refentrytitle>
682
<manvolnum>1</manvolnum></citerefentry>
551
683
</para>
552
684
<variablelist>
553
685
<varlistentry>
563
695
</varlistentry>
564
696
<varlistentry>
565
697
<term>
566
<ulink url="http://www.avahi.org/">Avahi</ulink>
698
<ulink url="https://www.avahi.org/">Avahi</ulink>
567
699
</term>
568
700
<listitem>
569
701
<para>
574
706
</varlistentry>
575
707
<varlistentry>
576
708
<term>
577
<ulink url="http://www.gnu.org/software/gnutls/"
578
>GnuTLS</ulink>
709
<ulink url="https://gnutls.org/">GnuTLS</ulink>
579
710
</term>
580
711
<listitem>
581
712
<para>
582
713
GnuTLS is the library this server uses to implement TLS for
583
714
communicating securely with the client, and at the same time
584
confidently get the client’s public OpenPGP key.
715
confidently get the client’s public key.
585
716
</para>
586
717
</listitem>
587
718
</varlistentry>
619
750
</varlistentry>
620
751
<varlistentry>
621
752
<term>
622
RFC 4346: <citetitle>The Transport Layer Security (TLS)
623
Protocol Version 1.1</citetitle>
753
RFC 5246: <citetitle>The Transport Layer Security (TLS)
754
Protocol Version 1.2</citetitle>
624
755
</term>
625
756
<listitem>
626
757
<para>
627
TLS 1.1 is the protocol implemented by GnuTLS.
758
TLS 1.2 is the protocol implemented by GnuTLS.
628
759
</para>
629
760
</listitem>
630
761
</varlistentry>
640
771
</varlistentry>
641
772
<varlistentry>
642
773
<term>
643
RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
644
Security</citetitle>
645
</term>
646
<listitem>
647
<para>
648
This is implemented by GnuTLS and used by this server so
649
that OpenPGP keys can be used.
774
RFC 7250: <citetitle>Using Raw Public Keys in Transport
775
Layer Security (TLS) and Datagram Transport Layer Security
776
(DTLS)</citetitle>
777
</term>
778
<listitem>
779
<para>
780
This is implemented by GnuTLS version 3.6.6 and is, if
781
present, used by this server so that raw public keys can be
782
used.
783
</para>
784
</listitem>
785
</varlistentry>
786
<varlistentry>
787
<term>
788
RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
789
Security (TLS) Authentication</citetitle>
790
</term>
791
<listitem>
792
<para>
793
This is implemented by GnuTLS before version 3.6.0 and is,
794
if present, used by this server so that OpenPGP keys can be
795
used.
650
796
</para>
651
797
</listitem>
652
798
</varlistentry>
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0