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  • Committer: Teddy Hogeborn
  • Date: 2024-11-24 00:44:25 UTC
  • Revision ID: teddy@recompile.se-20241124004425-6k3y0ir1ksyjq3c4
mandos-keygen: Show warning about old OpenSSH versions

When generating a config file snippet on the Mandos client system
using mandos-keygen, and the default ssh-keyscan checker is used, and
if the OpenSSH version is 9.8 or later, the "checker" command
generated for the config file on the Mandos server will include the
"-q" option for ssh-keyscan.  This option did not exist on ssh-keyscan
from OpenSSH older than version 9.8.  Therefore, if the Mandos
*server* is running an older version of OpenSSH, where ssh-keyscan
does not support the "-q" option, this option must be removed from the
generated "checker" setting.  Since we cannot know if this is the case
when running mandos-keygen on the Mandos client system, we print this
information as a comment above the generated "checker" setting.

* mandos-keygen: Show warning if the new "-q" options was used with
  ssh-keyscan in the generated "checker" setting.

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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"
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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-keygen">
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<!ENTITY TIMESTAMP "2008-09-06">
 
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<!ENTITY TIMESTAMP "2019-07-18">
 
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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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    <title>Mandos Manual</title>
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    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
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    <productname>Mandos</productname>
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    <productnumber>&VERSION;</productnumber>
 
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    <productnumber>&version;</productnumber>
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    <date>&TIMESTAMP;</date>
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    <authorgroup>
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      <author>
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        <firstname>Björn</firstname>
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        <surname>Påhlsson</surname>
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        <address>
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          <email>belorn@fukt.bsnet.se</email>
 
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          <email>belorn@recompile.se</email>
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        </address>
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      </author>
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      <author>
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        <firstname>Teddy</firstname>
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        <surname>Hogeborn</surname>
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        <address>
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          <email>teddy@fukt.bsnet.se</email>
 
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          <email>teddy@recompile.se</email>
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        </address>
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      </author>
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    </authorgroup>
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    <copyright>
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      <year>2008</year>
 
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      <year>2009</year>
 
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      <year>2010</year>
 
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      <year>2011</year>
 
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      <year>2012</year>
 
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      <year>2013</year>
 
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      <year>2014</year>
 
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      <year>2015</year>
 
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      <year>2016</year>
 
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      <year>2017</year>
 
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      <year>2018</year>
 
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      <year>2019</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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    <xi:include href="legalnotice.xml"/>
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  </refentryinfo>
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  <refmeta>
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    <refentrytitle>&COMMANDNAME;</refentrytitle>
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    <manvolnum>8</manvolnum>
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      Generate key and password for Mandos client and server.
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    </refpurpose>
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  </refnamediv>
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  <refsynopsisdiv>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
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        <replaceable>TIME</replaceable></option></arg>
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      </group>
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      <sbr/>
118
 
      <arg><option>--force</option></arg>
 
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      <group>
 
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        <arg choice="plain"><option>--tls-keytype
 
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        <replaceable>KEYTYPE</replaceable></option></arg>
 
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        <arg choice="plain"><option>-T
 
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        <replaceable>KEYTYPE</replaceable></option></arg>
 
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      </group>
 
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      <sbr/>
 
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      <group>
 
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        <arg choice="plain"><option>--force</option></arg>
 
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        <arg choice="plain"><option>-f</option></arg>
 
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      </group>
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    </cmdsynopsis>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
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      <group choice="req">
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        <arg choice="plain"><option>--password</option></arg>
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        <arg choice="plain"><option>-p</option></arg>
 
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        <arg choice="plain"><option>--passfile
 
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        <replaceable>FILE</replaceable></option></arg>
 
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        <arg choice="plain"><option>-F</option>
 
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        <replaceable>FILE</replaceable></arg>
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      </group>
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      <sbr/>
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      <group>
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        <arg choice="plain"><option>-n
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        <replaceable>NAME</replaceable></option></arg>
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      </group>
 
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      <group>
 
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        <arg choice="plain"><option>--no-ssh</option></arg>
 
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        <arg choice="plain"><option>-S</option></arg>
 
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      </group>
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    </cmdsynopsis>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
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    <title>DESCRIPTION</title>
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    <para>
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      <command>&COMMANDNAME;</command> is a program to generate the
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      OpenPGP key used by
 
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      TLS and OpenPGP keys used by
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      <citerefentry><refentrytitle>mandos-client</refentrytitle>
163
 
      <manvolnum>8mandos</manvolnum></citerefentry>.  The key is
164
 
      normally written to /etc/mandos for later installation into the
165
 
      initrd image, but this, and most other things, can be changed
166
 
      with command line options.
 
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      <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.
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    </para>
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    <para>
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      This program can also be used with the
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      <option>--password</option> option to generate a ready-made
171
 
      section for <filename>clients.conf</filename> (see
 
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      <option>--password</option> or <option>--passfile</option>
 
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      options to generate a ready-made section for
 
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      <filename>clients.conf</filename> (see
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      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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      <manvolnum>5</manvolnum></citerefentry>).
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    </para>
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--dir
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        <replaceable>DIRECTORY</replaceable></option></term>
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        <replaceable>DIRECTORY</replaceable></option></term>
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        <listitem>
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          <para>
208
 
            Target directory for key files.  Default is
209
 
            <filename>/etc/mandos</filename>.
 
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            Target directory for key files.  Default is <filename
 
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            class="directory">/etc/keys/mandos</filename>.
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          </para>
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        </listitem>
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      </varlistentry>
213
 
 
 
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      <varlistentry>
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        <term><option>--type
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        <replaceable>TYPE</replaceable></option></term>
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        <replaceable>TYPE</replaceable></option></term>
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        <listitem>
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          <para>
221
 
            Key type.  Default is <quote>DSA</quote>.
 
252
            OpenPGP key type.  Default is <quote>RSA</quote>.
222
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          </para>
223
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        </listitem>
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      </varlistentry>
225
 
 
 
256
      
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      <varlistentry>
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        <term><option>--length
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        <replaceable>BITS</replaceable></option></term>
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        <replaceable>BITS</replaceable></option></term>
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        <listitem>
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          <para>
233
 
            Key length in bits.  Default is 2048.
 
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            OpenPGP key length in bits.  Default is 4096.
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          </para>
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        </listitem>
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      </varlistentry>
237
 
 
 
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      <varlistentry>
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        <term><option>--subtype
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        <replaceable>KEYTYPE</replaceable></option></term>
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        <replaceable>KEYTYPE</replaceable></option></term>
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        <listitem>
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          <para>
245
 
            Subkey type.  Default is <quote>ELG-E</quote> (Elgamal
246
 
            encryption-only).
 
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            OpenPGP subkey type.  Default is <quote>RSA</quote>
247
277
          </para>
248
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        </listitem>
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      </varlistentry>
250
 
 
 
280
      
251
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      <varlistentry>
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        <term><option>--sublength
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        <replaceable>BITS</replaceable></option></term>
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        <replaceable>BITS</replaceable></option></term>
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        <listitem>
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          <para>
258
 
            Subkey length in bits.  Default is 2048.
 
288
            OpenPGP subkey length in bits.  Default is 4096.
259
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          </para>
260
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        </listitem>
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      </varlistentry>
262
 
 
 
292
      
263
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      <varlistentry>
264
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        <term><option>--email
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        <replaceable>ADDRESS</replaceable></option></term>
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          </para>
272
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        </listitem>
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      </varlistentry>
274
 
 
 
304
      
275
305
      <varlistentry>
276
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        <term><option>--comment
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        <replaceable>TEXT</replaceable></option></term>
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        <replaceable>TEXT</replaceable></option></term>
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        <listitem>
281
311
          <para>
282
 
            Comment field for key.  The default value is
283
 
            <quote><literal>Mandos client key</literal></quote>.
 
312
            Comment field for key.  Default is empty.
284
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          </para>
285
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        </listitem>
286
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      </varlistentry>
287
 
 
 
316
      
288
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      <varlistentry>
289
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        <term><option>--expire
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        <replaceable>TIME</replaceable></option></term>
298
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          </para>
299
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        </listitem>
300
329
      </varlistentry>
301
 
 
 
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
      
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      <varlistentry>
303
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        <term><option>--force</option></term>
304
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        <term><option>-f</option></term>
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        <listitem>
315
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          <para>
316
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            Prompt for a password and encrypt it with the key already
317
 
            present in either <filename>/etc/mandos</filename> or the
318
 
            directory specified with the <option>--dir</option>
 
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            present in either <filename>/etc/keys/mandos</filename> or
 
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            the directory specified with the <option>--dir</option>
319
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            option.  Outputs, on standard output, a section suitable
320
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            for inclusion in <citerefentry><refentrytitle
321
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            >mandos-clients.conf</refentrytitle><manvolnum
322
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            >8</manvolnum></citerefentry>.  The host name or the name
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            specified with the <option>--name</option> option is used
324
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            for the section header.  All other options are ignored,
325
 
            and no key is created.
 
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            and no key is created.  Note: white space is stripped from
 
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            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>
 
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      </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
 
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            <command>ssh-keyscan</command> to get an SSH fingerprint
 
394
            for this host and, if successful, output suitable config
 
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            options to use this fingerprint as a
 
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            <option>checker</option> option in the output.  This is
 
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            otherwise the default behavior.
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          </para>
327
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        </listitem>
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      </varlistentry>
329
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    </variablelist>
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  </refsect1>
331
 
 
 
403
  
332
404
  <refsect1 id="overview">
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    <title>OVERVIEW</title>
334
406
    <xi:include href="overview.xml"/>
335
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    <para>
336
 
      This program is a small utility to generate new OpenPGP keys for
337
 
      new Mandos clients, and to generate sections for inclusion in
338
 
      <filename>clients.conf</filename> on the server.
 
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.
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    </para>
340
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  </refsect1>
341
 
 
 
413
  
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  <refsect1 id="exit_status">
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    <title>EXIT STATUS</title>
344
416
    <para>
364
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    </variablelist>
365
437
  </refsect1>
366
438
  
367
 
  <refsect1 id="file">
 
439
  <refsect1 id="files">
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    <title>FILES</title>
369
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    <para>
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      Use the <option>--dir</option> option to change where
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    </para>
374
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    <variablelist>
375
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      <varlistentry>
376
 
        <term><filename>/etc/mandos/seckey.txt</filename></term>
 
448
        <term><filename>/etc/keys/mandos/seckey.txt</filename></term>
377
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        <listitem>
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          <para>
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            OpenPGP secret key file which will be created or
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454
        </listitem>
383
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      </varlistentry>
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      <varlistentry>
385
 
        <term><filename>/etc/mandos/pubkey.txt</filename></term>
 
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        <term><filename>/etc/keys/mandos/pubkey.txt</filename></term>
386
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        <listitem>
387
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          <para>
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            OpenPGP public key file which will be created or
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463
        </listitem>
392
464
      </varlistentry>
393
465
      <varlistentry>
394
 
        <term><filename>/tmp</filename></term>
 
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>
395
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        <listitem>
396
484
          <para>
397
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            Temporary files will be written here if
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489
      </varlistentry>
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    </variablelist>
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  </refsect1>
404
 
 
405
 
<!--   <refsect1 id="bugs"> -->
406
 
<!--     <title>BUGS</title> -->
407
 
<!--     <para> -->
408
 
<!--     </para> -->
409
 
<!--   </refsect1> -->
410
 
 
 
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
  
411
505
  <refsect1 id="example">
412
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    <title>EXAMPLE</title>
413
507
    <informalexample>
432
526
    </informalexample>
433
527
    <informalexample>
434
528
      <para>
435
 
        Prompt for a password, encrypt it with the key in
436
 
        <filename>/etc/mandos</filename> and output a section suitable
437
 
        for <filename>clients.conf</filename>.
 
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>.
438
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      </para>
439
533
      <para>
440
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        <userinput>&COMMANDNAME; --password</userinput>
442
536
    </informalexample>
443
537
    <informalexample>
444
538
      <para>
445
 
        Prompt for a password, encrypt it with the key in the
 
539
        Prompt for a password, encrypt it with the keys in the
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        <filename>client-key</filename> directory and output a section
447
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        suitable for <filename>clients.conf</filename>.
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      </para>
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      </para>
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    </informalexample>
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  </refsect1>
457
 
 
 
551
  
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  <refsect1 id="security">
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    <title>SECURITY</title>
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    <para>
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      <manvolnum>8</manvolnum></citerefentry>.
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    </para>
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565
  </refsect1>
472
 
 
 
566
  
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567
  <refsect1 id="see_also">
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    <title>SEE ALSO</title>
475
569
    <para>
 
570
      <citerefentry><refentrytitle>intro</refentrytitle>
 
571
      <manvolnum>8mandos</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>gpg</refentrytitle>
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      <manvolnum>1</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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      <citerefentry><refentrytitle>mandos</refentrytitle>
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      <manvolnum>8</manvolnum></citerefentry>,
482
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      <citerefentry><refentrytitle>mandos-client</refentrytitle>
483
 
      <manvolnum>8mandos</manvolnum></citerefentry>
 
579
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
580
      <citerefentry><refentrytitle>ssh-keyscan</refentrytitle>
 
581
      <manvolnum>1</manvolnum></citerefentry>
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582
    </para>
485
583
  </refsect1>
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