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  • Committer: Teddy Hogeborn
  • Date: 2015-07-20 03:03:33 UTC
  • Revision ID: teddy@recompile.se-20150720030333-203m2aeblypcsfte
Bug fix for GnuTLS 3: be compatible with old 2048-bit DSA keys.

The mandos-keygen program in Mandos version 1.6.0 and older generated
2048-bit DSA keys, and when GnuTLS uses these it has trouble
connecting using the Mandos default priority string.  This was
previously fixed in Mandos 1.6.2, but the bug reappeared when using
GnuTLS 3, so the default priority string has to change again; this
time also the Mandos client has to change its default, so now the
server and the client should use the same default priority string:

SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256

* mandos (main/server_defaults): Changed default priority string.
* mandos-options.xml (/section/para[id="priority_compat"]): Removed.
  (/section/para[id="priority"]): Changed default priority string.
* mandos.conf ([DEFAULT]/priority): - '' -
* mandos.conf.xml (OPTIONS/priority): Refer to the id "priority"
                                      instead of "priority_compat".
* mandos.xml (OPTIONS/--priority): - '' -
* plugins.d/mandos-client.c (main): Changed default priority string.

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Lines of Context:
mandos-keygen.xml
 
1
<?xml version="1.0" encoding="UTF-8"?>
 
2
<!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 "2014-06-22">
 
6
<!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>2011</year>
 
37
      <year>2012</year>
 
38
      <holder>Teddy Hogeborn</holder>
 
39
      <holder>Björn Påhlsson</holder>
 
40
    </copyright>
 
41
    <xi:include href="legalnotice.xml"/>
 
42
  </refentryinfo>
 
43
  
 
44
  <refmeta>
 
45
    <refentrytitle>&COMMANDNAME;</refentrytitle>
 
46
    <manvolnum>8</manvolnum>
 
47
  </refmeta>
 
48
  
 
49
  <refnamediv>
 
50
    <refname><command>&COMMANDNAME;</command></refname>
 
51
    <refpurpose>
 
52
      Generate key and password for Mandos client and server.
 
53
    </refpurpose>
 
54
  </refnamediv>
 
55
  
 
56
  <refsynopsisdiv>
 
57
    <cmdsynopsis>
 
58
      <command>&COMMANDNAME;</command>
 
59
      <group>
 
60
        <arg choice="plain"><option>--dir
 
61
        <replaceable>DIRECTORY</replaceable></option></arg>
 
62
        <arg choice="plain"><option>-d
 
63
        <replaceable>DIRECTORY</replaceable></option></arg>
 
64
      </group>
 
65
      <sbr/>
 
66
      <group>
 
67
        <arg choice="plain"><option>--type
 
68
        <replaceable>KEYTYPE</replaceable></option></arg>
 
69
        <arg choice="plain"><option>-t
 
70
        <replaceable>KEYTYPE</replaceable></option></arg>
 
71
      </group>
 
72
      <sbr/>
 
73
      <group>
 
74
        <arg choice="plain"><option>--length
 
75
        <replaceable>BITS</replaceable></option></arg>
 
76
        <arg choice="plain"><option>-l
 
77
        <replaceable>BITS</replaceable></option></arg>
 
78
      </group>
 
79
      <sbr/>
 
80
      <group>
 
81
        <arg choice="plain"><option>--subtype
 
82
        <replaceable>KEYTYPE</replaceable></option></arg>
 
83
        <arg choice="plain"><option>-s
 
84
        <replaceable>KEYTYPE</replaceable></option></arg>
 
85
      </group>
 
86
      <sbr/>
 
87
      <group>
 
88
        <arg choice="plain"><option>--sublength
 
89
        <replaceable>BITS</replaceable></option></arg>
 
90
        <arg choice="plain"><option>-L
 
91
        <replaceable>BITS</replaceable></option></arg>
 
92
      </group>
 
93
      <sbr/>
 
94
      <group>
 
95
        <arg choice="plain"><option>--name
 
96
        <replaceable>NAME</replaceable></option></arg>
 
97
        <arg choice="plain"><option>-n
 
98
        <replaceable>NAME</replaceable></option></arg>
 
99
      </group>
 
100
      <sbr/>
 
101
      <group>
 
102
        <arg choice="plain"><option>--email
 
103
        <replaceable>ADDRESS</replaceable></option></arg>
 
104
        <arg choice="plain"><option>-e
 
105
        <replaceable>ADDRESS</replaceable></option></arg>
 
106
      </group>
 
107
      <sbr/>
 
108
      <group>
 
109
        <arg choice="plain"><option>--comment
 
110
        <replaceable>TEXT</replaceable></option></arg>
 
111
        <arg choice="plain"><option>-c
 
112
        <replaceable>TEXT</replaceable></option></arg>
 
113
      </group>
 
114
      <sbr/>
 
115
      <group>
 
116
        <arg choice="plain"><option>--expire
 
117
        <replaceable>TIME</replaceable></option></arg>
 
118
        <arg choice="plain"><option>-x
 
119
        <replaceable>TIME</replaceable></option></arg>
 
120
      </group>
 
121
      <sbr/>
 
122
      <group>
 
123
        <arg choice="plain"><option>--force</option></arg>
 
124
        <arg choice="plain"><option>-f</option></arg>
 
125
      </group>
 
126
    </cmdsynopsis>
 
127
    <cmdsynopsis>
 
128
      <command>&COMMANDNAME;</command>
 
129
      <group choice="req">
 
130
        <arg choice="plain"><option>--password</option></arg>
 
131
        <arg choice="plain"><option>-p</option></arg>
 
132
        <arg choice="plain"><option>--passfile
 
133
        <replaceable>FILE</replaceable></option></arg>
 
134
        <arg choice="plain"><option>-F</option>
 
135
        <replaceable>FILE</replaceable></arg>
 
136
      </group>
 
137
      <sbr/>
 
138
      <group>
 
139
        <arg choice="plain"><option>--dir
 
140
        <replaceable>DIRECTORY</replaceable></option></arg>
 
141
        <arg choice="plain"><option>-d
 
142
        <replaceable>DIRECTORY</replaceable></option></arg>
 
143
      </group>
 
144
      <sbr/>
 
145
      <group>
 
146
        <arg choice="plain"><option>--name
 
147
        <replaceable>NAME</replaceable></option></arg>
 
148
        <arg choice="plain"><option>-n
 
149
        <replaceable>NAME</replaceable></option></arg>
 
150
      </group>
 
151
      <group>
 
152
        <arg choice="plain"><option>--no-ssh</option></arg>
 
153
        <arg choice="plain"><option>-S</option></arg>
 
154
      </group>
 
155
    </cmdsynopsis>
 
156
    <cmdsynopsis>
 
157
      <command>&COMMANDNAME;</command>
 
158
      <group choice="req">
 
159
        <arg choice="plain"><option>--help</option></arg>
 
160
        <arg choice="plain"><option>-h</option></arg>
 
161
      </group>
 
162
    </cmdsynopsis>
 
163
    <cmdsynopsis>
 
164
      <command>&COMMANDNAME;</command>
 
165
      <group choice="req">
 
166
        <arg choice="plain"><option>--version</option></arg>
 
167
        <arg choice="plain"><option>-v</option></arg>
 
168
      </group>
 
169
    </cmdsynopsis>
 
170
  </refsynopsisdiv>
 
171
  
 
172
  <refsect1 id="description">
 
173
    <title>DESCRIPTION</title>
 
174
    <para>
 
175
      <command>&COMMANDNAME;</command> is a program to generate the
 
176
      OpenPGP key used by
 
177
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
178
      <manvolnum>8mandos</manvolnum></citerefentry>.  The key is
 
179
      normally written to /etc/mandos for later installation into the
 
180
      initrd image, but this, and most other things, can be changed
 
181
      with command line options.
 
182
    </para>
 
183
    <para>
 
184
      This program can also be used with the
 
185
      <option>--password</option> or <option>--passfile</option>
 
186
      options to generate a ready-made section for
 
187
      <filename>clients.conf</filename> (see
 
188
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
189
      <manvolnum>5</manvolnum></citerefentry>).
 
190
    </para>
 
191
  </refsect1>
 
192
  
 
193
  <refsect1 id="purpose">
 
194
    <title>PURPOSE</title>
 
195
    <para>
 
196
      The purpose of this is to enable <emphasis>remote and unattended
 
197
      rebooting</emphasis> of client host computer with an
 
198
      <emphasis>encrypted root file system</emphasis>.  See <xref
 
199
      linkend="overview"/> for details.
 
200
    </para>
 
201
  </refsect1>
 
202
  
 
203
  <refsect1 id="options">
 
204
    <title>OPTIONS</title>
 
205
    
 
206
    <variablelist>
 
207
      <varlistentry>
 
208
        <term><option>--help</option></term>
 
209
        <term><option>-h</option></term>
 
210
        <listitem>
 
211
          <para>
 
212
            Show a help message and exit
 
213
          </para>
 
214
        </listitem>
 
215
      </varlistentry>
 
216
      
 
217
      <varlistentry>
 
218
        <term><option>--dir
 
219
        <replaceable>DIRECTORY</replaceable></option></term>
 
220
        <term><option>-d
 
221
        <replaceable>DIRECTORY</replaceable></option></term>
 
222
        <listitem>
 
223
          <para>
 
224
            Target directory for key files.  Default is
 
225
            <filename class="directory">/etc/mandos</filename>.
 
226
          </para>
 
227
        </listitem>
 
228
      </varlistentry>
 
229
      
 
230
      <varlistentry>
 
231
        <term><option>--type
 
232
        <replaceable>TYPE</replaceable></option></term>
 
233
        <term><option>-t
 
234
        <replaceable>TYPE</replaceable></option></term>
 
235
        <listitem>
 
236
          <para>
 
237
            Key type.  Default is <quote>RSA</quote>.
 
238
          </para>
 
239
        </listitem>
 
240
      </varlistentry>
 
241
      
 
242
      <varlistentry>
 
243
        <term><option>--length
 
244
        <replaceable>BITS</replaceable></option></term>
 
245
        <term><option>-l
 
246
        <replaceable>BITS</replaceable></option></term>
 
247
        <listitem>
 
248
          <para>
 
249
            Key length in bits.  Default is 4096.
 
250
          </para>
 
251
        </listitem>
 
252
      </varlistentry>
 
253
      
 
254
      <varlistentry>
 
255
        <term><option>--subtype
 
256
        <replaceable>KEYTYPE</replaceable></option></term>
 
257
        <term><option>-s
 
258
        <replaceable>KEYTYPE</replaceable></option></term>
 
259
        <listitem>
 
260
          <para>
 
261
            Subkey type.  Default is <quote>RSA</quote> (Elgamal
 
262
            encryption-only).
 
263
          </para>
 
264
        </listitem>
 
265
      </varlistentry>
 
266
      
 
267
      <varlistentry>
 
268
        <term><option>--sublength
 
269
        <replaceable>BITS</replaceable></option></term>
 
270
        <term><option>-L
 
271
        <replaceable>BITS</replaceable></option></term>
 
272
        <listitem>
 
273
          <para>
 
274
            Subkey length in bits.  Default is 4096.
 
275
          </para>
 
276
        </listitem>
 
277
      </varlistentry>
 
278
      
 
279
      <varlistentry>
 
280
        <term><option>--email
 
281
        <replaceable>ADDRESS</replaceable></option></term>
 
282
        <term><option>-e
 
283
        <replaceable>ADDRESS</replaceable></option></term>
 
284
        <listitem>
 
285
          <para>
 
286
            Email address of key.  Default is empty.
 
287
          </para>
 
288
        </listitem>
 
289
      </varlistentry>
 
290
      
 
291
      <varlistentry>
 
292
        <term><option>--comment
 
293
        <replaceable>TEXT</replaceable></option></term>
 
294
        <term><option>-c
 
295
        <replaceable>TEXT</replaceable></option></term>
 
296
        <listitem>
 
297
          <para>
 
298
            Comment field for key.  Default is empty.
 
299
          </para>
 
300
        </listitem>
 
301
      </varlistentry>
 
302
      
 
303
      <varlistentry>
 
304
        <term><option>--expire
 
305
        <replaceable>TIME</replaceable></option></term>
 
306
        <term><option>-x
 
307
        <replaceable>TIME</replaceable></option></term>
 
308
        <listitem>
 
309
          <para>
 
310
            Key expire time.  Default is no expiration.  See
 
311
            <citerefentry><refentrytitle>gpg</refentrytitle>
 
312
            <manvolnum>1</manvolnum></citerefentry> for syntax.
 
313
          </para>
 
314
        </listitem>
 
315
      </varlistentry>
 
316
      
 
317
      <varlistentry>
 
318
        <term><option>--force</option></term>
 
319
        <term><option>-f</option></term>
 
320
        <listitem>
 
321
          <para>
 
322
            Force overwriting old key.
 
323
          </para>
 
324
        </listitem>
 
325
      </varlistentry>
 
326
      <varlistentry>
 
327
        <term><option>--password</option></term>
 
328
        <term><option>-p</option></term>
 
329
        <listitem>
 
330
          <para>
 
331
            Prompt for a password and encrypt it with the key already
 
332
            present in either <filename>/etc/mandos</filename> or the
 
333
            directory specified with the <option>--dir</option>
 
334
            option.  Outputs, on standard output, a section suitable
 
335
            for inclusion in <citerefentry><refentrytitle
 
336
            >mandos-clients.conf</refentrytitle><manvolnum
 
337
            >8</manvolnum></citerefentry>.  The host name or the name
 
338
            specified with the <option>--name</option> option is used
 
339
            for the section header.  All other options are ignored,
 
340
            and no key is created.
 
341
          </para>
 
342
        </listitem>
 
343
      </varlistentry>
 
344
      <varlistentry>
 
345
        <term><option>--passfile
 
346
        <replaceable>FILE</replaceable></option></term>
 
347
        <term><option>-F
 
348
        <replaceable>FILE</replaceable></option></term>
 
349
        <listitem>
 
350
          <para>
 
351
            The same as <option>--password</option>, but read from
 
352
            <replaceable>FILE</replaceable>, not the terminal.
 
353
          </para>
 
354
        </listitem>
 
355
      </varlistentry>
 
356
      <varlistentry>
 
357
        <term><option>--no-ssh</option></term>
 
358
        <term><option>-S</option></term>
 
359
        <listitem>
 
360
          <para>
 
361
            When <option>--password</option> or
 
362
            <option>--passfile</option> is given, this option will
 
363
            prevent <command>&COMMANDNAME;</command> from calling
 
364
            <command>ssh-keyscan</command> to get an SSH fingerprint
 
365
            for this host and, if successful, output suitable config
 
366
            options to use this fingerprint as a
 
367
            <option>checker</option> option in the output.  This is
 
368
            otherwise the default behavior.
 
369
          </para>
 
370
        </listitem>
 
371
      </varlistentry>
 
372
    </variablelist>
 
373
  </refsect1>
 
374
  
 
375
  <refsect1 id="overview">
 
376
    <title>OVERVIEW</title>
 
377
    <xi:include href="overview.xml"/>
 
378
    <para>
 
379
      This program is a small utility to generate new OpenPGP keys for
 
380
      new Mandos clients, and to generate sections for inclusion in
 
381
      <filename>clients.conf</filename> on the server.
 
382
    </para>
 
383
  </refsect1>
 
384
  
 
385
  <refsect1 id="exit_status">
 
386
    <title>EXIT STATUS</title>
 
387
    <para>
 
388
      The exit status will be 0 if a new key (or password, if the
 
389
      <option>--password</option> option was used) was successfully
 
390
      created, otherwise not.
 
391
    </para>
 
392
  </refsect1>
 
393
  
 
394
  <refsect1 id="environment">
 
395
    <title>ENVIRONMENT</title>
 
396
    <variablelist>
 
397
      <varlistentry>
 
398
        <term><envar>TMPDIR</envar></term>
 
399
        <listitem>
 
400
          <para>
 
401
            If set, temporary files will be created here. See
 
402
            <citerefentry><refentrytitle>mktemp</refentrytitle>
 
403
            <manvolnum>1</manvolnum></citerefentry>.
 
404
          </para>
 
405
        </listitem>
 
406
      </varlistentry>
 
407
    </variablelist>
 
408
  </refsect1>
 
409
  
 
410
  <refsect1 id="files">
 
411
    <title>FILES</title>
 
412
    <para>
 
413
      Use the <option>--dir</option> option to change where
 
414
      <command>&COMMANDNAME;</command> will write the key files.  The
 
415
      default file names are shown here.
 
416
    </para>
 
417
    <variablelist>
 
418
      <varlistentry>
 
419
        <term><filename>/etc/mandos/seckey.txt</filename></term>
 
420
        <listitem>
 
421
          <para>
 
422
            OpenPGP secret key file which will be created or
 
423
            overwritten.
 
424
          </para>
 
425
        </listitem>
 
426
      </varlistentry>
 
427
      <varlistentry>
 
428
        <term><filename>/etc/mandos/pubkey.txt</filename></term>
 
429
        <listitem>
 
430
          <para>
 
431
            OpenPGP public key file which will be created or
 
432
            overwritten.
 
433
          </para>
 
434
        </listitem>
 
435
      </varlistentry>
 
436
      <varlistentry>
 
437
        <term><filename class="directory">/tmp</filename></term>
 
438
        <listitem>
 
439
          <para>
 
440
            Temporary files will be written here if
 
441
            <varname>TMPDIR</varname> is not set.
 
442
          </para>
 
443
        </listitem>
 
444
      </varlistentry>
 
445
    </variablelist>
 
446
  </refsect1>
 
447
  
 
448
<!--   <refsect1 id="bugs"> -->
 
449
<!--     <title>BUGS</title> -->
 
450
<!--     <para> -->
 
451
<!--     </para> -->
 
452
<!--   </refsect1> -->
 
453
  
 
454
  <refsect1 id="example">
 
455
    <title>EXAMPLE</title>
 
456
    <informalexample>
 
457
      <para>
 
458
        Normal invocation needs no options:
 
459
      </para>
 
460
      <para>
 
461
        <userinput>&COMMANDNAME;</userinput>
 
462
      </para>
 
463
    </informalexample>
 
464
    <informalexample>
 
465
      <para>
 
466
        Create key in another directory and of another type.  Force
 
467
        overwriting old key files:
 
468
      </para>
 
469
      <para>
 
470
 
 
471
<!-- do not wrap this line -->
 
472
<userinput>&COMMANDNAME; --dir ~/keydir --type RSA --force</userinput>
 
473
 
 
474
      </para>
 
475
    </informalexample>
 
476
    <informalexample>
 
477
      <para>
 
478
        Prompt for a password, encrypt it with the key in <filename
 
479
        class="directory">/etc/mandos</filename> and output a section
 
480
        suitable for <filename>clients.conf</filename>.
 
481
      </para>
 
482
      <para>
 
483
        <userinput>&COMMANDNAME; --password</userinput>
 
484
      </para>
 
485
    </informalexample>
 
486
    <informalexample>
 
487
      <para>
 
488
        Prompt for a password, encrypt it with the key in the
 
489
        <filename>client-key</filename> directory and output a section
 
490
        suitable for <filename>clients.conf</filename>.
 
491
      </para>
 
492
      <para>
 
493
 
 
494
<!-- do not wrap this line -->
 
495
<userinput>&COMMANDNAME; --password --dir client-key</userinput>
 
496
 
 
497
      </para>
 
498
    </informalexample>
 
499
  </refsect1>
 
500
  
 
501
  <refsect1 id="security">
 
502
    <title>SECURITY</title>
 
503
    <para>
 
504
      The <option>--type</option>, <option>--length</option>,
 
505
      <option>--subtype</option>, and <option>--sublength</option>
 
506
      options can be used to create keys of low security.  If in
 
507
      doubt, leave them to the default values.
 
508
    </para>
 
509
    <para>
 
510
      The key expire time is <emphasis>not</emphasis> guaranteed to be
 
511
      honored by <citerefentry><refentrytitle>mandos</refentrytitle>
 
512
      <manvolnum>8</manvolnum></citerefentry>.
 
513
    </para>
 
514
  </refsect1>
 
515
  
 
516
  <refsect1 id="see_also">
 
517
    <title>SEE ALSO</title>
 
518
    <para>
 
519
      <citerefentry><refentrytitle>intro</refentrytitle>
 
520
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
521
      <citerefentry><refentrytitle>gpg</refentrytitle>
 
522
      <manvolnum>1</manvolnum></citerefentry>,
 
523
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
524
      <manvolnum>5</manvolnum></citerefentry>,
 
525
      <citerefentry><refentrytitle>mandos</refentrytitle>
 
526
      <manvolnum>8</manvolnum></citerefentry>,
 
527
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
528
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
529
      <citerefentry><refentrytitle>ssh-keyscan</refentrytitle>
 
530
      <manvolnum>1</manvolnum></citerefentry>
 
531
    </para>
 
532
  </refsect1>
 
533
  
 
534
</refentry>
 
535
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536
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537
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538
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539
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