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  • Committer: Teddy Hogeborn
  • Date: 2016-03-17 20:40:55 UTC
  • Revision ID: teddy@recompile.se-20160317204055-bhsh5xsidq7w5cxu
Client: Fix plymouth agent; broken since 1.7.2.

Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2.  This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.

* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
  allocating new_argv.  Also tolerate a zero-length argv.

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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 "2016-03-05">
 
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>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
      <holder>Teddy Hogeborn</holder>
 
44
      <holder>Björn Påhlsson</holder>
 
45
    </copyright>
 
46
    <xi:include href="legalnotice.xml"/>
 
47
  </refentryinfo>
 
48
  
 
49
  <refmeta>
 
50
    <refentrytitle>&COMMANDNAME;</refentrytitle>
 
51
    <manvolnum>8</manvolnum>
 
52
  </refmeta>
 
53
  
 
54
  <refnamediv>
 
55
    <refname><command>&COMMANDNAME;</command></refname>
 
56
    <refpurpose>
 
57
      Generate key and password for Mandos client and server.
 
58
    </refpurpose>
 
59
  </refnamediv>
 
60
  
 
61
  <refsynopsisdiv>
 
62
    <cmdsynopsis>
 
63
      <command>&COMMANDNAME;</command>
 
64
      <group>
 
65
        <arg choice="plain"><option>--dir
 
66
        <replaceable>DIRECTORY</replaceable></option></arg>
 
67
        <arg choice="plain"><option>-d
 
68
        <replaceable>DIRECTORY</replaceable></option></arg>
 
69
      </group>
 
70
      <sbr/>
 
71
      <group>
 
72
        <arg choice="plain"><option>--type
 
73
        <replaceable>KEYTYPE</replaceable></option></arg>
 
74
        <arg choice="plain"><option>-t
 
75
        <replaceable>KEYTYPE</replaceable></option></arg>
 
76
      </group>
 
77
      <sbr/>
 
78
      <group>
 
79
        <arg choice="plain"><option>--length
 
80
        <replaceable>BITS</replaceable></option></arg>
 
81
        <arg choice="plain"><option>-l
 
82
        <replaceable>BITS</replaceable></option></arg>
 
83
      </group>
 
84
      <sbr/>
 
85
      <group>
 
86
        <arg choice="plain"><option>--subtype
 
87
        <replaceable>KEYTYPE</replaceable></option></arg>
 
88
        <arg choice="plain"><option>-s
 
89
        <replaceable>KEYTYPE</replaceable></option></arg>
 
90
      </group>
 
91
      <sbr/>
 
92
      <group>
 
93
        <arg choice="plain"><option>--sublength
 
94
        <replaceable>BITS</replaceable></option></arg>
 
95
        <arg choice="plain"><option>-L
 
96
        <replaceable>BITS</replaceable></option></arg>
 
97
      </group>
 
98
      <sbr/>
 
99
      <group>
 
100
        <arg choice="plain"><option>--name
 
101
        <replaceable>NAME</replaceable></option></arg>
 
102
        <arg choice="plain"><option>-n
 
103
        <replaceable>NAME</replaceable></option></arg>
 
104
      </group>
 
105
      <sbr/>
 
106
      <group>
 
107
        <arg choice="plain"><option>--email
 
108
        <replaceable>ADDRESS</replaceable></option></arg>
 
109
        <arg choice="plain"><option>-e
 
110
        <replaceable>ADDRESS</replaceable></option></arg>
 
111
      </group>
 
112
      <sbr/>
 
113
      <group>
 
114
        <arg choice="plain"><option>--comment
 
115
        <replaceable>TEXT</replaceable></option></arg>
 
116
        <arg choice="plain"><option>-c
 
117
        <replaceable>TEXT</replaceable></option></arg>
 
118
      </group>
 
119
      <sbr/>
 
120
      <group>
 
121
        <arg choice="plain"><option>--expire
 
122
        <replaceable>TIME</replaceable></option></arg>
 
123
        <arg choice="plain"><option>-x
 
124
        <replaceable>TIME</replaceable></option></arg>
 
125
      </group>
 
126
      <sbr/>
 
127
      <group>
 
128
        <arg choice="plain"><option>--force</option></arg>
 
129
        <arg choice="plain"><option>-f</option></arg>
 
130
      </group>
 
131
    </cmdsynopsis>
 
132
    <cmdsynopsis>
 
133
      <command>&COMMANDNAME;</command>
 
134
      <group choice="req">
 
135
        <arg choice="plain"><option>--password</option></arg>
 
136
        <arg choice="plain"><option>-p</option></arg>
 
137
        <arg choice="plain"><option>--passfile
 
138
        <replaceable>FILE</replaceable></option></arg>
 
139
        <arg choice="plain"><option>-F</option>
 
140
        <replaceable>FILE</replaceable></arg>
 
141
      </group>
 
142
      <sbr/>
 
143
      <group>
 
144
        <arg choice="plain"><option>--dir
 
145
        <replaceable>DIRECTORY</replaceable></option></arg>
 
146
        <arg choice="plain"><option>-d
 
147
        <replaceable>DIRECTORY</replaceable></option></arg>
 
148
      </group>
 
149
      <sbr/>
 
150
      <group>
 
151
        <arg choice="plain"><option>--name
 
152
        <replaceable>NAME</replaceable></option></arg>
 
153
        <arg choice="plain"><option>-n
 
154
        <replaceable>NAME</replaceable></option></arg>
 
155
      </group>
 
156
      <group>
 
157
        <arg choice="plain"><option>--no-ssh</option></arg>
 
158
        <arg choice="plain"><option>-S</option></arg>
 
159
      </group>
 
160
    </cmdsynopsis>
 
161
    <cmdsynopsis>
 
162
      <command>&COMMANDNAME;</command>
 
163
      <group choice="req">
 
164
        <arg choice="plain"><option>--help</option></arg>
 
165
        <arg choice="plain"><option>-h</option></arg>
 
166
      </group>
 
167
    </cmdsynopsis>
 
168
    <cmdsynopsis>
 
169
      <command>&COMMANDNAME;</command>
 
170
      <group choice="req">
 
171
        <arg choice="plain"><option>--version</option></arg>
 
172
        <arg choice="plain"><option>-v</option></arg>
 
173
      </group>
 
174
    </cmdsynopsis>
 
175
  </refsynopsisdiv>
 
176
  
 
177
  <refsect1 id="description">
 
178
    <title>DESCRIPTION</title>
 
179
    <para>
 
180
      <command>&COMMANDNAME;</command> is a program to generate the
 
181
      OpenPGP key used by
 
182
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
183
      <manvolnum>8mandos</manvolnum></citerefentry>.  The key is
 
184
      normally written to /etc/mandos for later installation into the
 
185
      initrd image, but this, and most other things, can be changed
 
186
      with command line options.
 
187
    </para>
 
188
    <para>
 
189
      This program can also be used with the
 
190
      <option>--password</option> or <option>--passfile</option>
 
191
      options to generate a ready-made section for
 
192
      <filename>clients.conf</filename> (see
 
193
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
194
      <manvolnum>5</manvolnum></citerefentry>).
 
195
    </para>
 
196
  </refsect1>
 
197
  
 
198
  <refsect1 id="purpose">
 
199
    <title>PURPOSE</title>
 
200
    <para>
 
201
      The purpose of this is to enable <emphasis>remote and unattended
 
202
      rebooting</emphasis> of client host computer with an
 
203
      <emphasis>encrypted root file system</emphasis>.  See <xref
 
204
      linkend="overview"/> for details.
 
205
    </para>
 
206
  </refsect1>
 
207
  
 
208
  <refsect1 id="options">
 
209
    <title>OPTIONS</title>
 
210
    
 
211
    <variablelist>
 
212
      <varlistentry>
 
213
        <term><option>--help</option></term>
 
214
        <term><option>-h</option></term>
 
215
        <listitem>
 
216
          <para>
 
217
            Show a help message and exit
 
218
          </para>
 
219
        </listitem>
 
220
      </varlistentry>
 
221
      
 
222
      <varlistentry>
 
223
        <term><option>--dir
 
224
        <replaceable>DIRECTORY</replaceable></option></term>
 
225
        <term><option>-d
 
226
        <replaceable>DIRECTORY</replaceable></option></term>
 
227
        <listitem>
 
228
          <para>
 
229
            Target directory for key files.  Default is
 
230
            <filename class="directory">/etc/mandos</filename>.
 
231
          </para>
 
232
        </listitem>
 
233
      </varlistentry>
 
234
      
 
235
      <varlistentry>
 
236
        <term><option>--type
 
237
        <replaceable>TYPE</replaceable></option></term>
 
238
        <term><option>-t
 
239
        <replaceable>TYPE</replaceable></option></term>
 
240
        <listitem>
 
241
          <para>
 
242
            Key type.  Default is <quote>RSA</quote>.
 
243
          </para>
 
244
        </listitem>
 
245
      </varlistentry>
 
246
      
 
247
      <varlistentry>
 
248
        <term><option>--length
 
249
        <replaceable>BITS</replaceable></option></term>
 
250
        <term><option>-l
 
251
        <replaceable>BITS</replaceable></option></term>
 
252
        <listitem>
 
253
          <para>
 
254
            Key length in bits.  Default is 4096.
 
255
          </para>
 
256
        </listitem>
 
257
      </varlistentry>
 
258
      
 
259
      <varlistentry>
 
260
        <term><option>--subtype
 
261
        <replaceable>KEYTYPE</replaceable></option></term>
 
262
        <term><option>-s
 
263
        <replaceable>KEYTYPE</replaceable></option></term>
 
264
        <listitem>
 
265
          <para>
 
266
            Subkey type.  Default is <quote>RSA</quote> (Elgamal
 
267
            encryption-only).
 
268
          </para>
 
269
        </listitem>
 
270
      </varlistentry>
 
271
      
 
272
      <varlistentry>
 
273
        <term><option>--sublength
 
274
        <replaceable>BITS</replaceable></option></term>
 
275
        <term><option>-L
 
276
        <replaceable>BITS</replaceable></option></term>
 
277
        <listitem>
 
278
          <para>
 
279
            Subkey length in bits.  Default is 4096.
 
280
          </para>
 
281
        </listitem>
 
282
      </varlistentry>
 
283
      
 
284
      <varlistentry>
 
285
        <term><option>--email
 
286
        <replaceable>ADDRESS</replaceable></option></term>
 
287
        <term><option>-e
 
288
        <replaceable>ADDRESS</replaceable></option></term>
 
289
        <listitem>
 
290
          <para>
 
291
            Email address of key.  Default is empty.
 
292
          </para>
 
293
        </listitem>
 
294
      </varlistentry>
 
295
      
 
296
      <varlistentry>
 
297
        <term><option>--comment
 
298
        <replaceable>TEXT</replaceable></option></term>
 
299
        <term><option>-c
 
300
        <replaceable>TEXT</replaceable></option></term>
 
301
        <listitem>
 
302
          <para>
 
303
            Comment field for key.  Default is empty.
 
304
          </para>
 
305
        </listitem>
 
306
      </varlistentry>
 
307
      
 
308
      <varlistentry>
 
309
        <term><option>--expire
 
310
        <replaceable>TIME</replaceable></option></term>
 
311
        <term><option>-x
 
312
        <replaceable>TIME</replaceable></option></term>
 
313
        <listitem>
 
314
          <para>
 
315
            Key expire time.  Default is no expiration.  See
 
316
            <citerefentry><refentrytitle>gpg</refentrytitle>
 
317
            <manvolnum>1</manvolnum></citerefentry> for syntax.
 
318
          </para>
 
319
        </listitem>
 
320
      </varlistentry>
 
321
      
 
322
      <varlistentry>
 
323
        <term><option>--force</option></term>
 
324
        <term><option>-f</option></term>
 
325
        <listitem>
 
326
          <para>
 
327
            Force overwriting old key.
 
328
          </para>
 
329
        </listitem>
 
330
      </varlistentry>
 
331
      <varlistentry>
 
332
        <term><option>--password</option></term>
 
333
        <term><option>-p</option></term>
 
334
        <listitem>
 
335
          <para>
 
336
            Prompt for a password and encrypt it with the key already
 
337
            present in either <filename>/etc/mandos</filename> or the
 
338
            directory specified with the <option>--dir</option>
 
339
            option.  Outputs, on standard output, a section suitable
 
340
            for inclusion in <citerefentry><refentrytitle
 
341
            >mandos-clients.conf</refentrytitle><manvolnum
 
342
            >8</manvolnum></citerefentry>.  The host name or the name
 
343
            specified with the <option>--name</option> option is used
 
344
            for the section header.  All other options are ignored,
 
345
            and no key is created.
 
346
          </para>
 
347
        </listitem>
 
348
      </varlistentry>
 
349
      <varlistentry>
 
350
        <term><option>--passfile
 
351
        <replaceable>FILE</replaceable></option></term>
 
352
        <term><option>-F
 
353
        <replaceable>FILE</replaceable></option></term>
 
354
        <listitem>
 
355
          <para>
 
356
            The same as <option>--password</option>, but read from
 
357
            <replaceable>FILE</replaceable>, not the terminal.
 
358
          </para>
 
359
        </listitem>
 
360
      </varlistentry>
 
361
      <varlistentry>
 
362
        <term><option>--no-ssh</option></term>
 
363
        <term><option>-S</option></term>
 
364
        <listitem>
 
365
          <para>
 
366
            When <option>--password</option> or
 
367
            <option>--passfile</option> is given, this option will
 
368
            prevent <command>&COMMANDNAME;</command> from calling
 
369
            <command>ssh-keyscan</command> to get an SSH fingerprint
 
370
            for this host and, if successful, output suitable config
 
371
            options to use this fingerprint as a
 
372
            <option>checker</option> option in the output.  This is
 
373
            otherwise the default behavior.
 
374
          </para>
 
375
        </listitem>
 
376
      </varlistentry>
 
377
    </variablelist>
 
378
  </refsect1>
 
379
  
 
380
  <refsect1 id="overview">
 
381
    <title>OVERVIEW</title>
 
382
    <xi:include href="overview.xml"/>
 
383
    <para>
 
384
      This program is a small utility to generate new OpenPGP keys for
 
385
      new Mandos clients, and to generate sections for inclusion in
 
386
      <filename>clients.conf</filename> on the server.
 
387
    </para>
 
388
  </refsect1>
 
389
  
 
390
  <refsect1 id="exit_status">
 
391
    <title>EXIT STATUS</title>
 
392
    <para>
 
393
      The exit status will be 0 if a new key (or password, if the
 
394
      <option>--password</option> option was used) was successfully
 
395
      created, otherwise not.
 
396
    </para>
 
397
  </refsect1>
 
398
  
 
399
  <refsect1 id="environment">
 
400
    <title>ENVIRONMENT</title>
 
401
    <variablelist>
 
402
      <varlistentry>
 
403
        <term><envar>TMPDIR</envar></term>
 
404
        <listitem>
 
405
          <para>
 
406
            If set, temporary files will be created here. See
 
407
            <citerefentry><refentrytitle>mktemp</refentrytitle>
 
408
            <manvolnum>1</manvolnum></citerefentry>.
 
409
          </para>
 
410
        </listitem>
 
411
      </varlistentry>
 
412
    </variablelist>
 
413
  </refsect1>
 
414
  
 
415
  <refsect1 id="files">
 
416
    <title>FILES</title>
 
417
    <para>
 
418
      Use the <option>--dir</option> option to change where
 
419
      <command>&COMMANDNAME;</command> will write the key files.  The
 
420
      default file names are shown here.
 
421
    </para>
 
422
    <variablelist>
 
423
      <varlistentry>
 
424
        <term><filename>/etc/mandos/seckey.txt</filename></term>
 
425
        <listitem>
 
426
          <para>
 
427
            OpenPGP secret key file which will be created or
 
428
            overwritten.
 
429
          </para>
 
430
        </listitem>
 
431
      </varlistentry>
 
432
      <varlistentry>
 
433
        <term><filename>/etc/mandos/pubkey.txt</filename></term>
 
434
        <listitem>
 
435
          <para>
 
436
            OpenPGP public key file which will be created or
 
437
            overwritten.
 
438
          </para>
 
439
        </listitem>
 
440
      </varlistentry>
 
441
      <varlistentry>
 
442
        <term><filename class="directory">/tmp</filename></term>
 
443
        <listitem>
 
444
          <para>
 
445
            Temporary files will be written here if
 
446
            <varname>TMPDIR</varname> is not set.
 
447
          </para>
 
448
        </listitem>
 
449
      </varlistentry>
 
450
    </variablelist>
 
451
  </refsect1>
 
452
  
 
453
  <refsect1 id="bugs">
 
454
    <title>BUGS</title>
 
455
    <xi:include href="bugs.xml"/>
 
456
  </refsect1>
 
457
  
 
458
  <refsect1 id="example">
 
459
    <title>EXAMPLE</title>
 
460
    <informalexample>
 
461
      <para>
 
462
        Normal invocation needs no options:
 
463
      </para>
 
464
      <para>
 
465
        <userinput>&COMMANDNAME;</userinput>
 
466
      </para>
 
467
    </informalexample>
 
468
    <informalexample>
 
469
      <para>
 
470
        Create key in another directory and of another type.  Force
 
471
        overwriting old key files:
 
472
      </para>
 
473
      <para>
 
474
 
 
475
<!-- do not wrap this line -->
 
476
<userinput>&COMMANDNAME; --dir ~/keydir --type RSA --force</userinput>
 
477
 
 
478
      </para>
 
479
    </informalexample>
 
480
    <informalexample>
 
481
      <para>
 
482
        Prompt for a password, encrypt it with the key in <filename
 
483
        class="directory">/etc/mandos</filename> and output a section
 
484
        suitable for <filename>clients.conf</filename>.
 
485
      </para>
 
486
      <para>
 
487
        <userinput>&COMMANDNAME; --password</userinput>
 
488
      </para>
 
489
    </informalexample>
 
490
    <informalexample>
 
491
      <para>
 
492
        Prompt for a password, encrypt it with the key in the
 
493
        <filename>client-key</filename> directory and output a section
 
494
        suitable for <filename>clients.conf</filename>.
 
495
      </para>
 
496
      <para>
 
497
 
 
498
<!-- do not wrap this line -->
 
499
<userinput>&COMMANDNAME; --password --dir client-key</userinput>
 
500
 
 
501
      </para>
 
502
    </informalexample>
 
503
  </refsect1>
 
504
  
 
505
  <refsect1 id="security">
 
506
    <title>SECURITY</title>
 
507
    <para>
 
508
      The <option>--type</option>, <option>--length</option>,
 
509
      <option>--subtype</option>, and <option>--sublength</option>
 
510
      options can be used to create keys of low security.  If in
 
511
      doubt, leave them to the default values.
 
512
    </para>
 
513
    <para>
 
514
      The key expire time is <emphasis>not</emphasis> guaranteed to be
 
515
      honored by <citerefentry><refentrytitle>mandos</refentrytitle>
 
516
      <manvolnum>8</manvolnum></citerefentry>.
 
517
    </para>
 
518
  </refsect1>
 
519
  
 
520
  <refsect1 id="see_also">
 
521
    <title>SEE ALSO</title>
 
522
    <para>
 
523
      <citerefentry><refentrytitle>intro</refentrytitle>
 
524
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
525
      <citerefentry><refentrytitle>gpg</refentrytitle>
 
526
      <manvolnum>1</manvolnum></citerefentry>,
 
527
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
528
      <manvolnum>5</manvolnum></citerefentry>,
 
529
      <citerefentry><refentrytitle>mandos</refentrytitle>
 
530
      <manvolnum>8</manvolnum></citerefentry>,
 
531
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
532
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
533
      <citerefentry><refentrytitle>ssh-keyscan</refentrytitle>
 
534
      <manvolnum>1</manvolnum></citerefentry>
 
535
    </para>
 
536
  </refsect1>
 
537
  
 
538
</refentry>
 
539
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540
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541
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542
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543
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