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Code cleanup and one bug fix.

* mandos (Client.enable): Bug fix: Do not enable if already enabled.
  (MandosServer.__init__): Create empty set of clients if none passed.
  (main): Do not create clients set; do not pass a clients set to
          MandosServer.  Use tcp_server.clients throughout.

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Lines of Context:
mandos.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY VERSION "1.0">
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<!ENTITY COMMANDNAME "mandos">
 
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<!ENTITY TIMESTAMP "2009-02-15">
 
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<!ENTITY % common SYSTEM "common.ent">
 
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%common;
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]>
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<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
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  <refentryinfo>
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    <title>&COMMANDNAME;</title>
 
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   <refentryinfo>
 
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    <title>Mandos Manual</title>
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    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
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    <productname>&COMMANDNAME;</productname>
13
 
    <productnumber>&VERSION;</productnumber>
 
14
    <productname>Mandos</productname>
 
15
    <productnumber>&version;</productnumber>
 
16
    <date>&TIMESTAMP;</date>
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    <authorgroup>
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      <author>
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        <firstname>Björn</firstname>
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    </authorgroup>
30
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    <copyright>
31
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      <year>2008</year>
 
35
      <year>2009</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
35
 
    <legalnotice>
36
 
      <para>
37
 
        This manual page is free software: you can redistribute it
38
 
        and/or modify it under the terms of the GNU General Public
39
 
        License as published by the Free Software Foundation,
40
 
        either version 3 of the License, or (at your option) any
41
 
        later version.
42
 
      </para>
43
 
 
44
 
      <para>
45
 
        This manual page is distributed in the hope that it will
46
 
        be useful, but WITHOUT ANY WARRANTY; without even the
47
 
        implied warranty of MERCHANTABILITY or FITNESS FOR A
48
 
        PARTICULAR PURPOSE.  See the GNU General Public License
49
 
        for more details.
50
 
      </para>
51
 
 
52
 
      <para>
53
 
        You should have received a copy of the GNU General Public
54
 
        License along with this program; If not, see
55
 
        <ulink url="http://www.gnu.org/licenses/"/>.
56
 
      </para>
57
 
    </legalnotice>
 
39
    <xi:include href="legalnotice.xml"/>
58
40
  </refentryinfo>
59
 
 
 
41
  
60
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  <refmeta>
61
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    <refentrytitle>&COMMANDNAME;</refentrytitle>
62
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    <manvolnum>8</manvolnum>
65
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  <refnamediv>
66
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    <refname><command>&COMMANDNAME;</command></refname>
67
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    <refpurpose>
68
 
      Sends encrypted passwords to authenticated Mandos clients
 
50
      Gives encrypted passwords to authenticated Mandos clients
69
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    </refpurpose>
70
52
  </refnamediv>
71
 
 
 
53
  
72
54
  <refsynopsisdiv>
73
55
    <cmdsynopsis>
74
56
      <command>&COMMANDNAME;</command>
75
 
      <arg>--interface<arg choice="plain">IF</arg></arg>
76
 
      <arg>--address<arg choice="plain">ADDRESS</arg></arg>
77
 
      <arg>--port<arg choice="plain">PORT</arg></arg>
78
 
      <arg>--priority<arg choice="plain">PRIORITY</arg></arg>
79
 
      <arg>--servicename<arg choice="plain">NAME</arg></arg>
80
 
      <arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
81
 
      <arg>--debug</arg>
82
 
    </cmdsynopsis>
83
 
    <cmdsynopsis>
84
 
      <command>&COMMANDNAME;</command>
85
 
      <arg>-i<arg choice="plain">IF</arg></arg>
86
 
      <arg>-a<arg choice="plain">ADDRESS</arg></arg>
87
 
      <arg>-p<arg choice="plain">PORT</arg></arg>
88
 
      <arg>--priority<arg choice="plain">PRIORITY</arg></arg>
89
 
      <arg>--servicename<arg choice="plain">NAME</arg></arg>
90
 
      <arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
91
 
      <arg>--debug</arg>
 
57
      <group>
 
58
        <arg choice="plain"><option>--interface
 
59
        <replaceable>NAME</replaceable></option></arg>
 
60
        <arg choice="plain"><option>-i
 
61
        <replaceable>NAME</replaceable></option></arg>
 
62
      </group>
 
63
      <sbr/>
 
64
      <group>
 
65
        <arg choice="plain"><option>--address
 
66
        <replaceable>ADDRESS</replaceable></option></arg>
 
67
        <arg choice="plain"><option>-a
 
68
        <replaceable>ADDRESS</replaceable></option></arg>
 
69
      </group>
 
70
      <sbr/>
 
71
      <group>
 
72
        <arg choice="plain"><option>--port
 
73
        <replaceable>PORT</replaceable></option></arg>
 
74
        <arg choice="plain"><option>-p
 
75
        <replaceable>PORT</replaceable></option></arg>
 
76
      </group>
 
77
      <sbr/>
 
78
      <arg><option>--priority
 
79
      <replaceable>PRIORITY</replaceable></option></arg>
 
80
      <sbr/>
 
81
      <arg><option>--servicename
 
82
      <replaceable>NAME</replaceable></option></arg>
 
83
      <sbr/>
 
84
      <arg><option>--configdir
 
85
      <replaceable>DIRECTORY</replaceable></option></arg>
 
86
      <sbr/>
 
87
      <arg><option>--debug</option></arg>
 
88
      <sbr/>
 
89
      <arg><option>--no-dbus</option></arg>
 
90
      <sbr/>
 
91
      <arg><option>--no-ipv6</option></arg>
92
92
    </cmdsynopsis>
93
93
    <cmdsynopsis>
94
94
      <command>&COMMANDNAME;</command>
95
95
      <group choice="req">
96
 
        <arg choice="plain">-h</arg>
97
 
        <arg choice="plain">--help</arg>
 
96
        <arg choice="plain"><option>--help</option></arg>
 
97
        <arg choice="plain"><option>-h</option></arg>
98
98
      </group>
99
99
    </cmdsynopsis>
100
100
    <cmdsynopsis>
101
101
      <command>&COMMANDNAME;</command>
102
 
      <arg choice="plain">--version</arg>
 
102
      <arg choice="plain"><option>--version</option></arg>
103
103
    </cmdsynopsis>
104
104
    <cmdsynopsis>
105
105
      <command>&COMMANDNAME;</command>
106
 
      <arg choice="plain">--check</arg>
 
106
      <arg choice="plain"><option>--check</option></arg>
107
107
    </cmdsynopsis>
108
108
  </refsynopsisdiv>
109
 
 
 
109
  
110
110
  <refsect1 id="description">
111
111
    <title>DESCRIPTION</title>
112
112
    <para>
121
121
      Any authenticated client is then given the stored pre-encrypted
122
122
      password for that specific client.
123
123
    </para>
124
 
 
125
124
  </refsect1>
126
125
  
127
126
  <refsect1 id="purpose">
128
127
    <title>PURPOSE</title>
129
 
 
130
128
    <para>
131
129
      The purpose of this is to enable <emphasis>remote and unattended
132
130
      rebooting</emphasis> of client host computer with an
133
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      <emphasis>encrypted root file system</emphasis>.  See <xref
134
132
      linkend="overview"/> for details.
135
133
    </para>
136
 
 
137
134
  </refsect1>
138
135
  
139
136
  <refsect1 id="options">
140
137
    <title>OPTIONS</title>
141
 
 
142
138
    <variablelist>
143
139
      <varlistentry>
144
 
        <term><literal>-h</literal>, <literal>--help</literal></term>
 
140
        <term><option>--help</option></term>
 
141
        <term><option>-h</option></term>
145
142
        <listitem>
146
143
          <para>
147
144
            Show a help message and exit
148
145
          </para>
149
146
        </listitem>
150
147
      </varlistentry>
151
 
 
 
148
      
152
149
      <varlistentry>
153
 
        <term><literal>-i</literal>, <literal>--interface <replaceable>
154
 
        IF</replaceable></literal></term>
 
150
        <term><option>--interface</option>
 
151
        <replaceable>NAME</replaceable></term>
 
152
        <term><option>-i</option>
 
153
        <replaceable>NAME</replaceable></term>
155
154
        <listitem>
156
155
          <xi:include href="mandos-options.xml" xpointer="interface"/>
157
156
        </listitem>
158
157
      </varlistentry>
159
 
 
 
158
      
160
159
      <varlistentry>
161
 
        <term><literal>-a</literal>, <literal>--address <replaceable>
162
 
        ADDRESS</replaceable></literal></term>
 
160
        <term><option>--address
 
161
        <replaceable>ADDRESS</replaceable></option></term>
 
162
        <term><option>-a
 
163
        <replaceable>ADDRESS</replaceable></option></term>
163
164
        <listitem>
164
165
          <xi:include href="mandos-options.xml" xpointer="address"/>
165
166
        </listitem>
166
167
      </varlistentry>
167
 
 
 
168
      
168
169
      <varlistentry>
169
 
        <term><literal>-p</literal>, <literal>--port <replaceable>
170
 
        PORT</replaceable></literal></term>
 
170
        <term><option>--port
 
171
        <replaceable>PORT</replaceable></option></term>
 
172
        <term><option>-p
 
173
        <replaceable>PORT</replaceable></option></term>
171
174
        <listitem>
172
175
          <xi:include href="mandos-options.xml" xpointer="port"/>
173
176
        </listitem>
174
177
      </varlistentry>
175
 
 
 
178
      
176
179
      <varlistentry>
177
 
        <term><literal>--check</literal></term>
 
180
        <term><option>--check</option></term>
178
181
        <listitem>
179
182
          <para>
180
183
            Run the server’s self-tests.  This includes any unit
182
185
          </para>
183
186
        </listitem>
184
187
      </varlistentry>
185
 
 
 
188
      
186
189
      <varlistentry>
187
 
        <term><literal>--debug</literal></term>
 
190
        <term><option>--debug</option></term>
188
191
        <listitem>
189
192
          <xi:include href="mandos-options.xml" xpointer="debug"/>
190
193
        </listitem>
191
194
      </varlistentry>
192
 
 
 
195
      
193
196
      <varlistentry>
194
 
        <term><literal>--priority <replaceable>
195
 
        PRIORITY</replaceable></literal></term>
 
197
        <term><option>--priority <replaceable>
 
198
        PRIORITY</replaceable></option></term>
196
199
        <listitem>
197
200
          <xi:include href="mandos-options.xml" xpointer="priority"/>
198
201
        </listitem>
199
202
      </varlistentry>
200
 
 
 
203
      
201
204
      <varlistentry>
202
 
        <term><literal>--servicename <replaceable>NAME</replaceable>
203
 
        </literal></term>
 
205
        <term><option>--servicename
 
206
        <replaceable>NAME</replaceable></option></term>
204
207
        <listitem>
205
208
          <xi:include href="mandos-options.xml"
206
209
                      xpointer="servicename"/>
207
210
        </listitem>
208
211
      </varlistentry>
209
 
 
 
212
      
210
213
      <varlistentry>
211
 
        <term><literal>--configdir <replaceable>DIR</replaceable>
212
 
        </literal></term>
 
214
        <term><option>--configdir
 
215
        <replaceable>DIRECTORY</replaceable></option></term>
213
216
        <listitem>
214
217
          <para>
215
218
            Directory to search for configuration files.  Default is
221
224
          </para>
222
225
        </listitem>
223
226
      </varlistentry>
224
 
 
 
227
      
225
228
      <varlistentry>
226
 
        <term><literal>--version</literal></term>
 
229
        <term><option>--version</option></term>
227
230
        <listitem>
228
231
          <para>
229
232
            Prints the program version and exit.
230
233
          </para>
231
234
        </listitem>
232
235
      </varlistentry>
 
236
      
 
237
      <varlistentry>
 
238
        <term><option>--no-dbus</option></term>
 
239
        <listitem>
 
240
          <xi:include href="mandos-options.xml" xpointer="dbus"/>
 
241
          <para>
 
242
            See also <xref linkend="dbus_interface"/>.
 
243
          </para>
 
244
        </listitem>
 
245
      </varlistentry>
 
246
      
 
247
      <varlistentry>
 
248
        <term><option>--no-ipv6</option></term>
 
249
        <listitem>
 
250
          <xi:include href="mandos-options.xml" xpointer="ipv6"/>
 
251
        </listitem>
 
252
      </varlistentry>
233
253
    </variablelist>
234
254
  </refsect1>
235
 
 
 
255
  
236
256
  <refsect1 id="overview">
237
257
    <title>OVERVIEW</title>
238
258
    <xi:include href="overview.xml"/>
239
259
    <para>
240
260
      This program is the server part.  It is a normal server program
241
261
      and will run in a normal system environment, not in an initial
242
 
      RAM disk environment.
 
262
      <acronym>RAM</acronym> disk environment.
243
263
    </para>
244
264
  </refsect1>
245
 
 
 
265
  
246
266
  <refsect1 id="protocol">
247
267
    <title>NETWORK PROTOCOL</title>
248
268
    <para>
300
320
      </row>
301
321
    </tbody></tgroup></table>
302
322
  </refsect1>
303
 
 
 
323
  
304
324
  <refsect1 id="checking">
305
325
    <title>CHECKING</title>
306
326
    <para>
314
334
      <manvolnum>5</manvolnum></citerefentry>.
315
335
    </para>
316
336
  </refsect1>
317
 
 
 
337
  
318
338
  <refsect1 id="logging">
319
339
    <title>LOGGING</title>
320
340
    <para>
324
344
      and also show them on the console.
325
345
    </para>
326
346
  </refsect1>
327
 
 
 
347
  
 
348
  <refsect1 id="dbus_interface">
 
349
    <title>D-BUS INTERFACE</title>
 
350
    <para>
 
351
      The server will by default provide a D-Bus system bus interface.
 
352
      This interface will only be accessible by the root user or a
 
353
      Mandos-specific user, if such a user exists.
 
354
      <!-- XXX -->
 
355
    </para>
 
356
  </refsect1>
 
357
  
328
358
  <refsect1 id="exit_status">
329
359
    <title>EXIT STATUS</title>
330
360
    <para>
332
362
      critical error is encountered.
333
363
    </para>
334
364
  </refsect1>
335
 
 
 
365
  
336
366
  <refsect1 id="environment">
337
367
    <title>ENVIRONMENT</title>
338
368
    <variablelist>
339
369
      <varlistentry>
340
 
        <term><varname>PATH</varname></term>
 
370
        <term><envar>PATH</envar></term>
341
371
        <listitem>
342
372
          <para>
343
373
            To start the configured checker (see <xref
352
382
      </varlistentry>
353
383
    </variablelist>
354
384
  </refsect1>
355
 
 
356
 
  <refsect1 id="file">
 
385
  
 
386
  <refsect1 id="files">
357
387
    <title>FILES</title>
358
388
    <para>
359
389
      Use the <option>--configdir</option> option to change where
382
412
        </listitem>
383
413
      </varlistentry>
384
414
      <varlistentry>
385
 
        <term><filename>/var/run/mandos/mandos.pid</filename></term>
 
415
        <term><filename>/var/run/mandos.pid</filename></term>
386
416
        <listitem>
387
417
          <para>
388
418
            The file containing the process id of
423
453
      Currently, if a client is declared <quote>invalid</quote> due to
424
454
      having timed out, the server does not record this fact onto
425
455
      permanent storage.  This has some security implications, see
426
 
      <xref linkend="CLIENTS"/>.
 
456
      <xref linkend="clients"/>.
427
457
    </para>
428
458
    <para>
429
459
      There is currently no way of querying the server of the current
437
467
      Debug mode is conflated with running in the foreground.
438
468
    </para>
439
469
    <para>
440
 
      The console log messages does not show a timestamp.
 
470
      The console log messages do not show a time stamp.
 
471
    </para>
 
472
    <para>
 
473
      This server does not check the expire time of clients’ OpenPGP
 
474
      keys.
441
475
    </para>
442
476
  </refsect1>
443
477
  
448
482
        Normal invocation needs no options:
449
483
      </para>
450
484
      <para>
451
 
        <userinput>mandos</userinput>
 
485
        <userinput>&COMMANDNAME;</userinput>
452
486
      </para>
453
487
    </informalexample>
454
488
    <informalexample>
461
495
      <para>
462
496
 
463
497
<!-- do not wrap this line -->
464
 
<userinput>mandos --debug --configdir ~/mandos --servicename Test</userinput>
 
498
<userinput>&COMMANDNAME; --debug --configdir ~/mandos --servicename Test</userinput>
465
499
 
466
500
      </para>
467
501
    </informalexample>
473
507
      <para>
474
508
 
475
509
<!-- do not wrap this line -->
476
 
<userinput>mandos --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>
 
510
<userinput>&COMMANDNAME; --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>
477
511
 
478
512
      </para>
479
513
    </informalexample>
480
514
  </refsect1>
481
 
 
 
515
  
482
516
  <refsect1 id="security">
483
517
    <title>SECURITY</title>
484
 
    <refsect2 id="SERVER">
 
518
    <refsect2 id="server">
485
519
      <title>SERVER</title>
486
520
      <para>
487
521
        Running this <command>&COMMANDNAME;</command> server program
488
522
        should not in itself present any security risk to the host
489
 
        computer running it.  The program does not need any special
490
 
        privileges to run, and is designed to run as a non-root user.
 
523
        computer running it.  The program switches to a non-root user
 
524
        soon after startup.
491
525
      </para>
492
526
    </refsect2>
493
 
    <refsect2 id="CLIENTS">
 
527
    <refsect2 id="clients">
494
528
      <title>CLIENTS</title>
495
529
      <para>
496
530
        The server only gives out its stored data to clients which
503
537
        <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
504
538
        <manvolnum>5</manvolnum></citerefentry>)
505
539
        <emphasis>must</emphasis> be made non-readable by anyone
506
 
        except the user running the server.
 
540
        except the user starting the server (usually root).
507
541
      </para>
508
542
      <para>
509
543
        As detailed in <xref linkend="checking"/>, the status of all
520
554
        restarting servers if it is suspected that a client has, in
521
555
        fact, been compromised by parties who may now be running a
522
556
        fake Mandos client with the keys from the non-encrypted
523
 
        initial RAM image of the client host.  What should be done in
524
 
        that case (if restarting the server program really is
525
 
        necessary) is to stop the server program, edit the
 
557
        initial <acronym>RAM</acronym> image of the client host.  What
 
558
        should be done in that case (if restarting the server program
 
559
        really is necessary) is to stop the server program, edit the
526
560
        configuration file to omit any suspect clients, and restart
527
561
        the server program.
528
562
      </para>
529
563
      <para>
530
564
        For more details on client-side security, see
531
 
        <citerefentry><refentrytitle>password-request</refentrytitle>
 
565
        <citerefentry><refentrytitle>mandos-client</refentrytitle>
532
566
        <manvolnum>8mandos</manvolnum></citerefentry>.
533
567
      </para>
534
568
    </refsect2>
535
569
  </refsect1>
536
 
 
 
570
  
537
571
  <refsect1 id="see_also">
538
572
    <title>SEE ALSO</title>
539
573
    <para>
540
574
      <citerefentry>
 
575
        <refentrytitle>mandos-clients.conf</refentrytitle>
 
576
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry>
541
577
        <refentrytitle>mandos.conf</refentrytitle>
542
578
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry>
543
 
        <refentrytitle>mandos-clients.conf</refentrytitle>
544
 
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
 
        <refentrytitle>password-request</refentrytitle>
 
579
        <refentrytitle>mandos-client</refentrytitle>
546
580
        <manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
547
581
        <refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
548
582
      </citerefentry>
572
606
      </varlistentry>
573
607
      <varlistentry>
574
608
        <term>
575
 
          <ulink
576
 
              url="http://www.gnu.org/software/gnutls/">GnuTLS</ulink>
 
609
          <ulink url="http://www.gnu.org/software/gnutls/"
 
610
          >GnuTLS</ulink>
577
611
        </term>
578
612
      <listitem>
579
613
        <para>
585
619
      </varlistentry>
586
620
      <varlistentry>
587
621
        <term>
588
 
          <citation>RFC 4291: <citetitle>IP Version 6 Addressing
589
 
          Architecture</citetitle>, section 2.5.6, Link-Local IPv6
590
 
          Unicast Addresses</citation>
 
622
          RFC 4291: <citetitle>IP Version 6 Addressing
 
623
          Architecture</citetitle>
591
624
        </term>
592
625
        <listitem>
593
 
          <para>
594
 
            The clients use IPv6 link-local addresses, which are
595
 
            immediately usable since a link-local addresses is
596
 
            automatically assigned to a network interfaces when it is
597
 
            brought up.
598
 
          </para>
 
626
          <variablelist>
 
627
            <varlistentry>
 
628
              <term>Section 2.2: <citetitle>Text Representation of
 
629
              Addresses</citetitle></term>
 
630
              <listitem><para/></listitem>
 
631
            </varlistentry>
 
632
            <varlistentry>
 
633
              <term>Section 2.5.5.2: <citetitle>IPv4-Mapped IPv6
 
634
              Address</citetitle></term>
 
635
              <listitem><para/></listitem>
 
636
            </varlistentry>
 
637
            <varlistentry>
 
638
            <term>Section 2.5.6, <citetitle>Link-Local IPv6 Unicast
 
639
            Addresses</citetitle></term>
 
640
            <listitem>
 
641
              <para>
 
642
                The clients use IPv6 link-local addresses, which are
 
643
                immediately usable since a link-local addresses is
 
644
                automatically assigned to a network interfaces when it
 
645
                is brought up.
 
646
              </para>
 
647
            </listitem>
 
648
            </varlistentry>
 
649
          </variablelist>
599
650
        </listitem>
600
651
      </varlistentry>
601
652
      <varlistentry>
602
653
        <term>
603
 
          <citation>RFC 4346: <citetitle>The Transport Layer Security
604
 
          (TLS) Protocol Version 1.1</citetitle></citation>
 
654
          RFC 4346: <citetitle>The Transport Layer Security (TLS)
 
655
          Protocol Version 1.1</citetitle>
605
656
        </term>
606
657
      <listitem>
607
658
        <para>
611
662
      </varlistentry>
612
663
      <varlistentry>
613
664
        <term>
614
 
          <citation>RFC 4880: <citetitle>OpenPGP Message
615
 
          Format</citetitle></citation>
 
665
          RFC 4880: <citetitle>OpenPGP Message Format</citetitle>
616
666
        </term>
617
667
      <listitem>
618
668
        <para>
622
672
      </varlistentry>
623
673
      <varlistentry>
624
674
        <term>
625
 
          <citation>RFC 5081: <citetitle>Using OpenPGP Keys for
626
 
          Transport Layer Security</citetitle></citation>
 
675
          RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
 
676
          Security</citetitle>
627
677
        </term>
628
678
      <listitem>
629
679
        <para>
635
685
    </variablelist>
636
686
  </refsect1>
637
687
</refentry>
 
688
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689
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690
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691
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