Failed to do start tls handshake: SSL routines:tls_early_post_process_client_hello:unsupported protocol

[marek22k]

Hello,

I am trying to implement the old TIC protocol. I want to use the Event Machine as a server. However, when I initiate the Start TLS handshake during the connection, the problem aborts with the following error:

139943097670528:error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol:../ssl/statem/statem_srvr.c:1685:

Once this is not a Ruby exception, which could be caught, furthermore the error is quite unclear to me.

Client says TLS Handshake failed: A TLS packet with unexpected length was received. (-9)

$ ruby -v
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]
$ openssl version
OpenSSL 1.1.1f  31 Mar 2020

Here is a dump of the handshake: https://paste.i2pd.xyz/?0b26082e7dcc61fe#7asPqnBaTAdENNydzEmj31nnQrafu3SyWWUWgSySk8Fo