/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release

« back to all changes in this revision

Viewing changes to mandos.conf.xml

  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:03:38 UTC
  • mto: (237.7.304 trunk)
  • mto: This revision was merged to the branch mainline in revision 325.
  • Revision ID: teddy@recompile.se-20150310180338-pcxw6r2qmw9k6br9
Add ":!RSA" to GnuTLS priority string, to disallow non-DHE kx.

If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default.  The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.

There is a "PFS" priority string specifier, but we can't use it because:

1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
   enables a lot more algorithms than "SECURE256".

2. It is only available since GnuTLS 3.2.4.

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

Show diffs side-by-side

added added

removed removed

Lines of Context:
3
3
        "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4
4
<!ENTITY CONFNAME "mandos.conf">
5
5
<!ENTITY CONFPATH "<filename>/etc/mandos/mandos.conf</filename>">
6
 
<!ENTITY TIMESTAMP "2019-02-10">
 
6
<!ENTITY TIMESTAMP "2013-10-23">
7
7
<!ENTITY % common SYSTEM "common.ent">
8
8
%common;
9
9
]>
34
34
    <copyright>
35
35
      <year>2008</year>
36
36
      <year>2009</year>
37
 
      <year>2010</year>
38
37
      <year>2011</year>
39
38
      <year>2012</year>
40
39
      <year>2013</year>
41
 
      <year>2014</year>
42
 
      <year>2015</year>
43
 
      <year>2016</year>
44
 
      <year>2017</year>
45
 
      <year>2018</year>
46
 
      <year>2019</year>
47
40
      <holder>Teddy Hogeborn</holder>
48
41
      <holder>Björn Påhlsson</holder>
49
42
    </copyright>
128
121
        <term><option>priority<literal> = </literal><replaceable
129
122
        >STRING</replaceable></option></term>
130
123
        <listitem>
131
 
          <xi:include href="mandos-options.xml" xpointer="priority"/>
 
124
          <xi:include href="mandos-options.xml"
 
125
                      xpointer="priority_compat"/>
132
126
        </listitem>
133
127
      </varlistentry>
134
128
      
207
201
      built-in module <systemitem class="library">ConfigParser</systemitem>
208
202
      requires it.
209
203
    </para>
210
 
    <xi:include href="bugs.xml"/>
211
204
  </refsect1>
212
205
  
213
206
  <refsect1 id="example">
230
223
interface = eth0
231
224
address = fe80::aede:48ff:fe71:f6f2
232
225
port = 1025
233
 
debug = True
234
 
priority = SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA
 
226
debug = true
 
227
priority = SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP
235
228
servicename = Daena
236
229
use_dbus = False
237
230
use_ipv6 = True