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  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:52:09 UTC
  • Revision ID: teddy@recompile.se-20150310185209-lxuovbu09zwyk9bx
Automatically determine the number of DH bits in the TLS handshake.

Instead of using a default value of 1024, check the OpenPGP key and
determine an appropriate number of DH bits to use, (using GnuTLS
functions made for this).  Document this new default behavior.

* plugins.d/mandos-client.c (safe_string): New function.
  (init_gnutls_global): If not specified, determine the number of DH
                        bits to use, based on the OpenPGP key.
* plugins.d/mandos-client.xml (OPTIONS): Document this new default of
                                         the --dh-bits option.

Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.

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plugins.d/mandos-client.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 "mandos-client">
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<!ENTITY TIMESTAMP "2015-07-06">
 
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<!ENTITY TIMESTAMP "2015-03-08">
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<!ENTITY % common SYSTEM "../common.ent">
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%common;
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]>
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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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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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  <refsect1 id="environment">
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    <title>ENVIRONMENT</title>
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    <variablelist>
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      <varlistentry>
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        <term><envar>MANDOSPLUGINHELPERDIR</envar></term>
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        <listitem>
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          <para>
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            This environment variable will be assumed to contain the
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            directory containing any helper executables.  The use and
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            nature of these helper executables, if any, is
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            purposefully not documented.
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        </para>
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        </listitem>
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      </varlistentry>
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    </variablelist>
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    <para>
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      This program does not use any other environment variables, not
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      even the ones provided by <citerefentry><refentrytitle
 
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      This program does not use any environment variables, not even
 
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      the ones provided by <citerefentry><refentrytitle
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      >cryptsetup</refentrytitle><manvolnum>8</manvolnum>
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    </citerefentry>.
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    </para>