<![CDATA[TLS 1.3 certificate authentication fails with "post-handshake" error.]]>TLS 1.3 "cannot perform post-handshake authentication" when using client certificate authentication.

opera-stable-101.0.4843.58-0.x86_64 on Fedora 36

Web page served on Apache httpd-2.4.37-56
OpenSSL 1.1.1k
on AlmaLinux 8.7
(I'm running this node, so can change the config to test TLS v1.3 functionality)

Works fine doing client certificate authentication with Apache config line:
SSLProtocol -all +TLSv1.2
but error shows up with
SSLProtocol -all +TLSv1.2 +TLSv1.3
Firefox seems to have a "config setting" to allow post-handshake authentication that
prevents this problem, but if Opera has such a flag, it' very well hidden.

It's only a matter of time before TLSv1.2 becomes insecure, so having the full suite of capabilities on TLSv1.3 is essential.

]]>https://forums.opera.com/topic/65808/tls-1-3-certificate-authentication-fails-with-post-handshake-errorRSS for NodeMon, 10 Aug 2026 09:09:11 GMTWed, 30 Aug 2023 12:33:35 GMT60<![CDATA[Reply to TLS 1.3 certificate authentication fails with "post-handshake" error. on Thu, 31 Aug 2023 22:54:24 GMT]]>@fonm
your suggestion doesn't fix the "post-handshake" error with TLS 1.3, and in addition causes many other websites (including This one!) to fail, because they are not running TLS 1.3.

]]>https://forums.opera.com/post/324996https://forums.opera.com/post/324996Thu, 31 Aug 2023 22:54:24 GMT<![CDATA[Reply to TLS 1.3 certificate authentication fails with "post-handshake" error. on Thu, 31 Aug 2023 08:32:39 GMT]]>@fonm said in TLS 1.3 certificate authentication fails with "post-handshake" error.:

opera-stable --tls1.3 --ssl-version-min 1.3

opera-stable --tls1.3 --ssl-version-min="tls1.3"
]]>https://forums.opera.com/post/324956https://forums.opera.com/post/324956Thu, 31 Aug 2023 08:32:39 GMT<![CDATA[Reply to TLS 1.3 certificate authentication fails with "post-handshake" error. on Thu, 31 Aug 2023 05:41:17 GMT]]>opera-stable --tls1.3 --ssl-version-min 1.3

]]>https://forums.opera.com/post/324925https://forums.opera.com/post/324925Thu, 31 Aug 2023 05:41:17 GMT