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  • Committer: Teddy Hogeborn
  • Date: 2023-02-07 19:29:28 UTC
  • Revision ID: teddy@recompile.se-20230207192928-ueasjbsufb92o6ud
Clarify documentation and a comment about GnuTLS versions

* clients.conf ([foo]/secret): In the comment for the example client's
  "secret" setting, clarify GnuTLS version conditions.
* mandos-clients.conf.xml (OPTIONS/fingerprint, OPTIONS/key_id):
  Clarify required/optional status under different GnuTLS versions.

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Lines of Context:
mandos-keygen.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"
 
3
        "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 
4
<!ENTITY COMMANDNAME "mandos-keygen">
 
5
<!ENTITY TIMESTAMP "2019-07-18">
 
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<!ENTITY % common SYSTEM "common.ent">
 
7
%common;
 
8
]>
 
9
 
 
10
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
 
11
  <refentryinfo>
 
12
    <title>Mandos Manual</title>
 
13
    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
 
14
    <productname>Mandos</productname>
 
15
    <productnumber>&version;</productnumber>
 
16
    <date>&TIMESTAMP;</date>
 
17
    <authorgroup>
 
18
      <author>
 
19
        <firstname>Björn</firstname>
 
20
        <surname>Påhlsson</surname>
 
21
        <address>
 
22
          <email>belorn@recompile.se</email>
 
23
        </address>
 
24
      </author>
 
25
      <author>
 
26
        <firstname>Teddy</firstname>
 
27
        <surname>Hogeborn</surname>
 
28
        <address>
 
29
          <email>teddy@recompile.se</email>
 
30
        </address>
 
31
      </author>
 
32
    </authorgroup>
 
33
    <copyright>
 
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>
 
46
      <holder>Teddy Hogeborn</holder>
 
47
      <holder>Björn Påhlsson</holder>
 
48
    </copyright>
 
49
    <xi:include href="legalnotice.xml"/>
 
50
  </refentryinfo>
 
51
  
 
52
  <refmeta>
 
53
    <refentrytitle>&COMMANDNAME;</refentrytitle>
 
54
    <manvolnum>8</manvolnum>
 
55
  </refmeta>
 
56
  
 
57
  <refnamediv>
 
58
    <refname><command>&COMMANDNAME;</command></refname>
 
59
    <refpurpose>
 
60
      Generate key and password for Mandos client and server.
 
61
    </refpurpose>
 
62
  </refnamediv>
 
63
  
 
64
  <refsynopsisdiv>
 
65
    <cmdsynopsis>
 
66
      <command>&COMMANDNAME;</command>
 
67
      <group>
 
68
        <arg choice="plain"><option>--dir
 
69
        <replaceable>DIRECTORY</replaceable></option></arg>
 
70
        <arg choice="plain"><option>-d
 
71
        <replaceable>DIRECTORY</replaceable></option></arg>
 
72
      </group>
 
73
      <sbr/>
 
74
      <group>
 
75
        <arg choice="plain"><option>--type
 
76
        <replaceable>KEYTYPE</replaceable></option></arg>
 
77
        <arg choice="plain"><option>-t
 
78
        <replaceable>KEYTYPE</replaceable></option></arg>
 
79
      </group>
 
80
      <sbr/>
 
81
      <group>
 
82
        <arg choice="plain"><option>--length
 
83
        <replaceable>BITS</replaceable></option></arg>
 
84
        <arg choice="plain"><option>-l
 
85
        <replaceable>BITS</replaceable></option></arg>
 
86
      </group>
 
87
      <sbr/>
 
88
      <group>
 
89
        <arg choice="plain"><option>--subtype
 
90
        <replaceable>KEYTYPE</replaceable></option></arg>
 
91
        <arg choice="plain"><option>-s
 
92
        <replaceable>KEYTYPE</replaceable></option></arg>
 
93
      </group>
 
94
      <sbr/>
 
95
      <group>
 
96
        <arg choice="plain"><option>--sublength
 
97
        <replaceable>BITS</replaceable></option></arg>
 
98
        <arg choice="plain"><option>-L
 
99
        <replaceable>BITS</replaceable></option></arg>
 
100
      </group>
 
101
      <sbr/>
 
102
      <group>
 
103
        <arg choice="plain"><option>--name
 
104
        <replaceable>NAME</replaceable></option></arg>
 
105
        <arg choice="plain"><option>-n
 
106
        <replaceable>NAME</replaceable></option></arg>
 
107
      </group>
 
108
      <sbr/>
 
109
      <group>
 
110
        <arg choice="plain"><option>--email
 
111
        <replaceable>ADDRESS</replaceable></option></arg>
 
112
        <arg choice="plain"><option>-e
 
113
        <replaceable>ADDRESS</replaceable></option></arg>
 
114
      </group>
 
115
      <sbr/>
 
116
      <group>
 
117
        <arg choice="plain"><option>--comment
 
118
        <replaceable>TEXT</replaceable></option></arg>
 
119
        <arg choice="plain"><option>-c
 
120
        <replaceable>TEXT</replaceable></option></arg>
 
121
      </group>
 
122
      <sbr/>
 
123
      <group>
 
124
        <arg choice="plain"><option>--expire
 
125
        <replaceable>TIME</replaceable></option></arg>
 
126
        <arg choice="plain"><option>-x
 
127
        <replaceable>TIME</replaceable></option></arg>
 
128
      </group>
 
129
      <sbr/>
 
130
      <group>
 
131
        <arg choice="plain"><option>--tls-keytype
 
132
        <replaceable>KEYTYPE</replaceable></option></arg>
 
133
        <arg choice="plain"><option>-T
 
134
        <replaceable>KEYTYPE</replaceable></option></arg>
 
135
      </group>
 
136
      <sbr/>
 
137
      <group>
 
138
        <arg choice="plain"><option>--force</option></arg>
 
139
        <arg choice="plain"><option>-f</option></arg>
 
140
      </group>
 
141
    </cmdsynopsis>
 
142
    <cmdsynopsis>
 
143
      <command>&COMMANDNAME;</command>
 
144
      <group choice="req">
 
145
        <arg choice="plain"><option>--password</option></arg>
 
146
        <arg choice="plain"><option>-p</option></arg>
 
147
        <arg choice="plain"><option>--passfile
 
148
        <replaceable>FILE</replaceable></option></arg>
 
149
        <arg choice="plain"><option>-F</option>
 
150
        <replaceable>FILE</replaceable></arg>
 
151
      </group>
 
152
      <sbr/>
 
153
      <group>
 
154
        <arg choice="plain"><option>--dir
 
155
        <replaceable>DIRECTORY</replaceable></option></arg>
 
156
        <arg choice="plain"><option>-d
 
157
        <replaceable>DIRECTORY</replaceable></option></arg>
 
158
      </group>
 
159
      <sbr/>
 
160
      <group>
 
161
        <arg choice="plain"><option>--name
 
162
        <replaceable>NAME</replaceable></option></arg>
 
163
        <arg choice="plain"><option>-n
 
164
        <replaceable>NAME</replaceable></option></arg>
 
165
      </group>
 
166
      <group>
 
167
        <arg choice="plain"><option>--no-ssh</option></arg>
 
168
        <arg choice="plain"><option>-S</option></arg>
 
169
      </group>
 
170
    </cmdsynopsis>
 
171
    <cmdsynopsis>
 
172
      <command>&COMMANDNAME;</command>
 
173
      <group choice="req">
 
174
        <arg choice="plain"><option>--help</option></arg>
 
175
        <arg choice="plain"><option>-h</option></arg>
 
176
      </group>
 
177
    </cmdsynopsis>
 
178
    <cmdsynopsis>
 
179
      <command>&COMMANDNAME;</command>
 
180
      <group choice="req">
 
181
        <arg choice="plain"><option>--version</option></arg>
 
182
        <arg choice="plain"><option>-v</option></arg>
 
183
      </group>
 
184
    </cmdsynopsis>
 
185
  </refsynopsisdiv>
 
186
  
 
187
  <refsect1 id="description">
 
188
    <title>DESCRIPTION</title>
 
189
    <para>
 
190
      <command>&COMMANDNAME;</command> is a program to generate the
 
191
      TLS and OpenPGP keys used by
 
192
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
193
      <manvolnum>8mandos</manvolnum></citerefentry>.  The keys are
 
194
      normally written to /etc/keys/mandos for later installation into
 
195
      the initrd image, but this, and most other things, can be
 
196
      changed with command line options.
 
197
    </para>
 
198
    <para>
 
199
      This program can also be used with the
 
200
      <option>--password</option> or <option>--passfile</option>
 
201
      options to generate a ready-made section for
 
202
      <filename>clients.conf</filename> (see
 
203
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
204
      <manvolnum>5</manvolnum></citerefentry>).
 
205
    </para>
 
206
  </refsect1>
 
207
  
 
208
  <refsect1 id="purpose">
 
209
    <title>PURPOSE</title>
 
210
    <para>
 
211
      The purpose of this is to enable <emphasis>remote and unattended
 
212
      rebooting</emphasis> of client host computer with an
 
213
      <emphasis>encrypted root file system</emphasis>.  See <xref
 
214
      linkend="overview"/> for details.
 
215
    </para>
 
216
  </refsect1>
 
217
  
 
218
  <refsect1 id="options">
 
219
    <title>OPTIONS</title>
 
220
    
 
221
    <variablelist>
 
222
      <varlistentry>
 
223
        <term><option>--help</option></term>
 
224
        <term><option>-h</option></term>
 
225
        <listitem>
 
226
          <para>
 
227
            Show a help message and exit
 
228
          </para>
 
229
        </listitem>
 
230
      </varlistentry>
 
231
      
 
232
      <varlistentry>
 
233
        <term><option>--dir
 
234
        <replaceable>DIRECTORY</replaceable></option></term>
 
235
        <term><option>-d
 
236
        <replaceable>DIRECTORY</replaceable></option></term>
 
237
        <listitem>
 
238
          <para>
 
239
            Target directory for key files.  Default is <filename
 
240
            class="directory">/etc/keys/mandos</filename>.
 
241
          </para>
 
242
        </listitem>
 
243
      </varlistentry>
 
244
      
 
245
      <varlistentry>
 
246
        <term><option>--type
 
247
        <replaceable>TYPE</replaceable></option></term>
 
248
        <term><option>-t
 
249
        <replaceable>TYPE</replaceable></option></term>
 
250
        <listitem>
 
251
          <para>
 
252
            OpenPGP key type.  Default is <quote>RSA</quote>.
 
253
          </para>
 
254
        </listitem>
 
255
      </varlistentry>
 
256
      
 
257
      <varlistentry>
 
258
        <term><option>--length
 
259
        <replaceable>BITS</replaceable></option></term>
 
260
        <term><option>-l
 
261
        <replaceable>BITS</replaceable></option></term>
 
262
        <listitem>
 
263
          <para>
 
264
            OpenPGP key length in bits.  Default is 4096.
 
265
          </para>
 
266
        </listitem>
 
267
      </varlistentry>
 
268
      
 
269
      <varlistentry>
 
270
        <term><option>--subtype
 
271
        <replaceable>KEYTYPE</replaceable></option></term>
 
272
        <term><option>-s
 
273
        <replaceable>KEYTYPE</replaceable></option></term>
 
274
        <listitem>
 
275
          <para>
 
276
            OpenPGP subkey type.  Default is <quote>RSA</quote>
 
277
          </para>
 
278
        </listitem>
 
279
      </varlistentry>
 
280
      
 
281
      <varlistentry>
 
282
        <term><option>--sublength
 
283
        <replaceable>BITS</replaceable></option></term>
 
284
        <term><option>-L
 
285
        <replaceable>BITS</replaceable></option></term>
 
286
        <listitem>
 
287
          <para>
 
288
            OpenPGP subkey length in bits.  Default is 4096.
 
289
          </para>
 
290
        </listitem>
 
291
      </varlistentry>
 
292
      
 
293
      <varlistentry>
 
294
        <term><option>--email
 
295
        <replaceable>ADDRESS</replaceable></option></term>
 
296
        <term><option>-e
 
297
        <replaceable>ADDRESS</replaceable></option></term>
 
298
        <listitem>
 
299
          <para>
 
300
            Email address of key.  Default is empty.
 
301
          </para>
 
302
        </listitem>
 
303
      </varlistentry>
 
304
      
 
305
      <varlistentry>
 
306
        <term><option>--comment
 
307
        <replaceable>TEXT</replaceable></option></term>
 
308
        <term><option>-c
 
309
        <replaceable>TEXT</replaceable></option></term>
 
310
        <listitem>
 
311
          <para>
 
312
            Comment field for key.  Default is empty.
 
313
          </para>
 
314
        </listitem>
 
315
      </varlistentry>
 
316
      
 
317
      <varlistentry>
 
318
        <term><option>--expire
 
319
        <replaceable>TIME</replaceable></option></term>
 
320
        <term><option>-x
 
321
        <replaceable>TIME</replaceable></option></term>
 
322
        <listitem>
 
323
          <para>
 
324
            Key expire time.  Default is no expiration.  See
 
325
            <citerefentry><refentrytitle>gpg</refentrytitle>
 
326
            <manvolnum>1</manvolnum></citerefentry> for syntax.
 
327
          </para>
 
328
        </listitem>
 
329
      </varlistentry>
 
330
      
 
331
      <varlistentry>
 
332
        <term><option>--tls-keytype
 
333
        <replaceable>KEYTYPE</replaceable></option></term>
 
334
        <term><option>-T
 
335
        <replaceable>KEYTYPE</replaceable></option></term>
 
336
        <listitem>
 
337
          <para>
 
338
            TLS key type.  Default is <quote>ed25519</quote>
 
339
          </para>
 
340
        </listitem>
 
341
      </varlistentry>
 
342
      
 
343
      <varlistentry>
 
344
        <term><option>--force</option></term>
 
345
        <term><option>-f</option></term>
 
346
        <listitem>
 
347
          <para>
 
348
            Force overwriting old key.
 
349
          </para>
 
350
        </listitem>
 
351
      </varlistentry>
 
352
      <varlistentry>
 
353
        <term><option>--password</option></term>
 
354
        <term><option>-p</option></term>
 
355
        <listitem>
 
356
          <para>
 
357
            Prompt for a password and encrypt it with the key already
 
358
            present in either <filename>/etc/keys/mandos</filename> or
 
359
            the directory specified with the <option>--dir</option>
 
360
            option.  Outputs, on standard output, a section suitable
 
361
            for inclusion in <citerefentry><refentrytitle
 
362
            >mandos-clients.conf</refentrytitle><manvolnum
 
363
            >8</manvolnum></citerefentry>.  The host name or the name
 
364
            specified with the <option>--name</option> option is used
 
365
            for the section header.  All other options are ignored,
 
366
            and no key is created.  Note: white space is stripped from
 
367
            the beginning and from the end of the password; See <xref
 
368
            linkend="bugs"/>.
 
369
          </para>
 
370
        </listitem>
 
371
      </varlistentry>
 
372
      <varlistentry>
 
373
        <term><option>--passfile
 
374
        <replaceable>FILE</replaceable></option></term>
 
375
        <term><option>-F
 
376
        <replaceable>FILE</replaceable></option></term>
 
377
        <listitem>
 
378
          <para>
 
379
            The same as <option>--password</option>, but read from
 
380
            <replaceable>FILE</replaceable>, not the terminal, and
 
381
            white space is not stripped from the password in any way.
 
382
          </para>
 
383
        </listitem>
 
384
      </varlistentry>
 
385
      <varlistentry>
 
386
        <term><option>--no-ssh</option></term>
 
387
        <term><option>-S</option></term>
 
388
        <listitem>
 
389
          <para>
 
390
            When <option>--password</option> or
 
391
            <option>--passfile</option> is given, this option will
 
392
            prevent <command>&COMMANDNAME;</command> from calling
 
393
            <command>ssh-keyscan</command> to get an SSH fingerprint
 
394
            for this host and, if successful, output suitable config
 
395
            options to use this fingerprint as a
 
396
            <option>checker</option> option in the output.  This is
 
397
            otherwise the default behavior.
 
398
          </para>
 
399
        </listitem>
 
400
      </varlistentry>
 
401
    </variablelist>
 
402
  </refsect1>
 
403
  
 
404
  <refsect1 id="overview">
 
405
    <title>OVERVIEW</title>
 
406
    <xi:include href="overview.xml"/>
 
407
    <para>
 
408
      This program is a small utility to generate new TLS and OpenPGP
 
409
      keys for new Mandos clients, and to generate sections for
 
410
      inclusion in <filename>clients.conf</filename> on the server.
 
411
    </para>
 
412
  </refsect1>
 
413
  
 
414
  <refsect1 id="exit_status">
 
415
    <title>EXIT STATUS</title>
 
416
    <para>
 
417
      The exit status will be 0 if a new key (or password, if the
 
418
      <option>--password</option> option was used) was successfully
 
419
      created, otherwise not.
 
420
    </para>
 
421
  </refsect1>
 
422
  
 
423
  <refsect1 id="environment">
 
424
    <title>ENVIRONMENT</title>
 
425
    <variablelist>
 
426
      <varlistentry>
 
427
        <term><envar>TMPDIR</envar></term>
 
428
        <listitem>
 
429
          <para>
 
430
            If set, temporary files will be created here. See
 
431
            <citerefentry><refentrytitle>mktemp</refentrytitle>
 
432
            <manvolnum>1</manvolnum></citerefentry>.
 
433
          </para>
 
434
        </listitem>
 
435
      </varlistentry>
 
436
    </variablelist>
 
437
  </refsect1>
 
438
  
 
439
  <refsect1 id="files">
 
440
    <title>FILES</title>
 
441
    <para>
 
442
      Use the <option>--dir</option> option to change where
 
443
      <command>&COMMANDNAME;</command> will write the key files.  The
 
444
      default file names are shown here.
 
445
    </para>
 
446
    <variablelist>
 
447
      <varlistentry>
 
448
        <term><filename>/etc/keys/mandos/seckey.txt</filename></term>
 
449
        <listitem>
 
450
          <para>
 
451
            OpenPGP secret key file which will be created or
 
452
            overwritten.
 
453
          </para>
 
454
        </listitem>
 
455
      </varlistentry>
 
456
      <varlistentry>
 
457
        <term><filename>/etc/keys/mandos/pubkey.txt</filename></term>
 
458
        <listitem>
 
459
          <para>
 
460
            OpenPGP public key file which will be created or
 
461
            overwritten.
 
462
          </para>
 
463
        </listitem>
 
464
      </varlistentry>
 
465
      <varlistentry>
 
466
        <term><filename>/etc/keys/mandos/tls-privkey.pem</filename></term>
 
467
        <listitem>
 
468
          <para>
 
469
            Private key file which will be created or overwritten.
 
470
          </para>
 
471
        </listitem>
 
472
      </varlistentry>
 
473
      <varlistentry>
 
474
        <term><filename>/etc/keys/mandos/tls-pubkey.pem</filename></term>
 
475
        <listitem>
 
476
          <para>
 
477
            Public key file which will be created or overwritten.
 
478
          </para>
 
479
        </listitem>
 
480
      </varlistentry>
 
481
      <varlistentry>
 
482
        <term><filename class="directory">/tmp</filename></term>
 
483
        <listitem>
 
484
          <para>
 
485
            Temporary files will be written here if
 
486
            <varname>TMPDIR</varname> is not set.
 
487
          </para>
 
488
        </listitem>
 
489
      </varlistentry>
 
490
    </variablelist>
 
491
  </refsect1>
 
492
  
 
493
  <refsect1 id="bugs">
 
494
    <title>BUGS</title>
 
495
    <para>
 
496
      The <option>--password</option>/<option>-p</option> option
 
497
      strips white space from the start and from the end of the
 
498
      password before using it.  If this is a problem, use the
 
499
      <option>--passfile</option> option instead, which does not do
 
500
      this.
 
501
    </para>
 
502
    <xi:include href="bugs.xml"/>
 
503
  </refsect1>
 
504
  
 
505
  <refsect1 id="example">
 
506
    <title>EXAMPLE</title>
 
507
    <informalexample>
 
508
      <para>
 
509
        Normal invocation needs no options:
 
510
      </para>
 
511
      <para>
 
512
        <userinput>&COMMANDNAME;</userinput>
 
513
      </para>
 
514
    </informalexample>
 
515
    <informalexample>
 
516
      <para>
 
517
        Create key in another directory and of another type.  Force
 
518
        overwriting old key files:
 
519
      </para>
 
520
      <para>
 
521
 
 
522
<!-- do not wrap this line -->
 
523
<userinput>&COMMANDNAME; --dir ~/keydir --type RSA --force</userinput>
 
524
 
 
525
      </para>
 
526
    </informalexample>
 
527
    <informalexample>
 
528
      <para>
 
529
        Prompt for a password, encrypt it with the keys in <filename
 
530
        class="directory">/etc/keys/mandos</filename> and output a
 
531
        section suitable for <filename>clients.conf</filename>.
 
532
      </para>
 
533
      <para>
 
534
        <userinput>&COMMANDNAME; --password</userinput>
 
535
      </para>
 
536
    </informalexample>
 
537
    <informalexample>
 
538
      <para>
 
539
        Prompt for a password, encrypt it with the keys in the
 
540
        <filename>client-key</filename> directory and output a section
 
541
        suitable for <filename>clients.conf</filename>.
 
542
      </para>
 
543
      <para>
 
544
 
 
545
<!-- do not wrap this line -->
 
546
<userinput>&COMMANDNAME; --password --dir client-key</userinput>
 
547
 
 
548
      </para>
 
549
    </informalexample>
 
550
  </refsect1>
 
551
  
 
552
  <refsect1 id="security">
 
553
    <title>SECURITY</title>
 
554
    <para>
 
555
      The <option>--type</option>, <option>--length</option>,
 
556
      <option>--subtype</option>, and <option>--sublength</option>
 
557
      options can be used to create keys of low security.  If in
 
558
      doubt, leave them to the default values.
 
559
    </para>
 
560
    <para>
 
561
      The key expire time is <emphasis>not</emphasis> guaranteed to be
 
562
      honored by <citerefentry><refentrytitle>mandos</refentrytitle>
 
563
      <manvolnum>8</manvolnum></citerefentry>.
 
564
    </para>
 
565
  </refsect1>
 
566
  
 
567
  <refsect1 id="see_also">
 
568
    <title>SEE ALSO</title>
 
569
    <para>
 
570
      <citerefentry><refentrytitle>intro</refentrytitle>
 
571
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
572
      <citerefentry><refentrytitle>gpg</refentrytitle>
 
573
      <manvolnum>1</manvolnum></citerefentry>,
 
574
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
575
      <manvolnum>5</manvolnum></citerefentry>,
 
576
      <citerefentry><refentrytitle>mandos</refentrytitle>
 
577
      <manvolnum>8</manvolnum></citerefentry>,
 
578
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
579
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
580
      <citerefentry><refentrytitle>ssh-keyscan</refentrytitle>
 
581
      <manvolnum>1</manvolnum></citerefentry>
 
582
    </para>
 
583
  </refsect1>
 
584
  
 
585
</refentry>
 
586
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587
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588
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589
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590
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