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<div class="moz-cite-prefix">On 7/19/19 12:09 PM, Maxim Dounin
wrote:<br>
</div>
<blockquote type="cite" cite="mid:20190719160941.GD1877@mdounin.ru">
<pre class="moz-quote-pre" wrap="">Hello!
On Thu, Jul 18, 2019 at 04:01:39PM -0400, Thomas Ward wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Downstream, in Ubuntu, we've got NGINX 1.14.0 in the repositories, and
TLS 1.3 enabled in the bionic-updates repository due to OpenSSL being
bumped to 1.1.1.š We don't currently have a mechanism
This means that TLS1.3 is "on by default" with the standard config being
rolled.š And nginx cannot control TLS1.3 because it's built against the
previous 1.1.0 libs.
A request to do a no-change rebuild to allow NGINX has been blocked
because we're concerned about other TLS 1.3 behaviorisms and whether
there's any other TLS related behaviors we need to be concerned about
doing a no-change rebuild against OpenSSL 1.1.1 with this library version.
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
So, you are:
- Not concerned about switching OpenSSL library to 1.1.1, which is
known to introduce multiple behaviour changes, including
TLS 1.3 enabled by default.
- Not concerned about using unsupported old nginx version.
- But concerned about doing an nginx rebuild against the library
you are running nginx with.
That sounds even more interesting than switching to OpenSSL 1.1.1 alone.</pre>
</blockquote>
That's a misconception - I'm working other mechanisms to provide
'updated' versions - but the problem is the 'stable release' process
downstream (just like in Debian, CentOS, etc. it's a headache).<br>
<blockquote type="cite" cite="mid:20190719160941.GD1877@mdounin.ru"><br>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">There's a few considerations here.š We need to make certain that such a
rebuild to allow NGINX to control TLS 1.3 protocol or ciphers isn't
going to introduce any additional TLS1.3 behaviors or feature
functionality that otherwise would not be controlled by OpenSSL under
the hood.
Is the NGINX team aware of any such 'extra' behaviors regarding TLS 1.3
which would be altered or introduced by a rebuild of the 1.14.0 packages
against OpenSSL 1.1.1 which would otherwise block such a rebuild?
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
TLS 1.3 is disabled by default in nginx, and that's probably the
most serious change you'll encounter - after recompilation, TLS
1.3 will be disabled by default as it should. I'm not aware of
any additional behaviour changes.
</pre>
</blockquote>
<p>Thanks for this information - this is what I was primarily
looking for an answer for.</p>
<p><br>
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<p>Thomas<br>
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