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List: apache-httpd-users
Subject: [users@httpd] session resumption not possible after graceful restart if tlsv1.3
From: Dominik Stillhard <Dominik.Stillhard () united-security-providers ! ch>
Date: 2020-02-06 8:15:26
Message-ID: 83CBBB217D00184187EEDA53C1A3E8D6B69CC34F () uspEXCH02 ! u-s-p ! local
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Hello dear apache users
With TLSv1.2 it is possible to resume a ssl-session after a graceful restar=
t, if a sessioncache is defined vie SSLSessionCache directive.
When I try to do the same with TLSv1.3, a full handshake is performed. With=
out the graceful restart, resumption works correctly.
Tested on apache 2.4.41
More details on stackoverflow:
https://stackoverflow.com/questions/60080365/apaches-sslsessioncache-not-wo=
rking-correctly-with-tlsv1-3-and-graceful-restart
Any Idea what could be the problem? I didn't find a bug report on this...
Kind regards
Dominik
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<p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Hello \
dear apache users<o:p></o:p></span></p> <p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">With \
TLSv1.2 it is possible to resume a ssl-session after a graceful restart, if a \
sessioncache is defined vie SSLSessionCache directive.<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">When \
I try to do the same with TLSv1.3, a full handshake is performed. Without the \
graceful restart, resumption works correctly.<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Tested \
on apache 2.4.41<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">More \
details on stackoverflow:<o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><a \
href="https://stackoverflow.com/questions/60080365/apaches-sslsessioncache-not-working \
-correctly-with-tlsv1-3-and-graceful-restart">https://stackoverflow.com/questions/6008 \
0365/apaches-sslsessioncache-not-working-correctly-with-tlsv1-3-and-graceful-restart</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Any \
Idea what could be the problem? I didn’t find a bug report on \
this…<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Kind \
regards<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Dominik
<o:p></o:p></span></p>
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