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  • Committer: Teddy Hogeborn
  • Date: 2024-11-24 00:44:25 UTC
  • mto: This revision was merged to the branch mainline in revision 412.
  • 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:
dracut-module/password-agent.xml
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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 COMMANDNAME "password-agent">
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<!ENTITY TIMESTAMP "2019-07-24">
 
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<!ENTITY TIMESTAMP "2020-09-16">
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<!ENTITY % common SYSTEM "../common.ent">
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%common;
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]>
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    </authorgroup>
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    <copyright>
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      <year>2019</year>
 
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      <year>2020</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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      be a <citerefentry><refentrytitle>systemd</refentrytitle>
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      <manvolnum>1</manvolnum></citerefentry> <quote>Password
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      Agent</quote> (See <ulink
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      url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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      >Password Agents</ulink>).  The aim of this program is therefore
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      to acquire and then send a password to some other program which
 
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      url="https://systemd.io/PASSWORD_AGENTS/">Password
 
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      Agents</ulink>).  The aim of this program is therefore to
 
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      acquire and then send a password to some other program which
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      will use the password to unlock the encrypted root disk.
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    </para>
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    <para>
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            Specify a different agent directory.  The default is
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            <quote><filename class="directory"
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            >/run/systemd/ask-password</filename ></quote> as per the
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            <ulink
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            url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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            >Password Agents</ulink> specification.
 
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            <ulink url="https://systemd.io/PASSWORD_AGENTS/">Password
 
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            Agents</ulink> specification.
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          </para>
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        </listitem>
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      </varlistentry>
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      responsible for getting a password from the Mandos client
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      program itself, and to send that password to whatever is
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      currently asking for a password using the systemd <ulink
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      url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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      >Password Agents</ulink> mechanism.
 
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      url="https://systemd.io/PASSWORD_AGENTS/">Password
 
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      Agents</ulink> mechanism.
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    </para>
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    <para>To accomplish this, &COMMANDNAME; runs the
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    <command>mandos-client</command> program (which is the actual
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    password is acquired from the
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    <replaceable>MANDOS_CLIENT</replaceable> program, sends that
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    password (as per the <ulink
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    url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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    >Password Agents</ulink> specification) to all currently
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    unanswered password questions.
 
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    url="https://systemd.io/PASSWORD_AGENTS/">Password Agents</ulink>
 
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    specification) to all currently unanswered password questions.
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    </para>
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    <para>
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      This program should be started (normally as a systemd service,
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            <para>
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              The default directory to watch for password questions as
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              per the <ulink
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              url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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              >Password Agents</ulink> specification; can be changed
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              by the <option>--agent-directory</option> option.
 
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              url="https://systemd.io/PASSWORD_AGENTS/">Password
 
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              Agents</ulink> specification; can be changed by the
 
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              <option>--agent-directory</option> option.
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            </para>
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          </listitem>
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        </varlistentry>
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      <para>
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<!-- do not wrap this line -->
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<userinput>&COMMANDNAME; -- /lib/mandos/mandos-client --pubkey=/etc/mandos/keys/pubkey.txt --seckey=/etc/mandos/keys/seckey.txt --tls-pubkey=/etc/mandos/keys/tls-pubkey.pem --tls-privkey=/etc/mandos/keys/tls-privkey.pem</userinput>
 
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<userinput>&COMMANDNAME; -- /lib/mandos/plugins.d/mandos-client --pubkey=/etc/mandos/keys/pubkey.txt --seckey=/etc/mandos/keys/seckey.txt --tls-pubkey=/etc/mandos/keys/tls-pubkey.pem --tls-privkey=/etc/mandos/keys/tls-privkey.pem</userinput>
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      </para>
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    </informalexample>
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    <variablelist>
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      <varlistentry>
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        <term>
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          <ulink
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              url="https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents/"
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              >Password Agents</ulink>
 
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          <ulink url="https://systemd.io/PASSWORD_AGENTS/">Password
 
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          Agents</ulink>
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        </term>
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        <listitem>
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          <para>