Looks like OpenSSL 1.1.1 finally fixed this (
https://github.com/openssl/openssl/issues/4301) and added early callback
(new in OpenSSL 1.1.1), which allows the application to switch SSL_CTXes
*before* TLS version negotiation.
Hopefully nginx 1.15 milestone will be able to take advantage of this.

Thanks!
Frank


On Mon, Apr 16, 2018 at 4:23 PM, Frank Liu <gfrankliu@gmail.com> wrote:

> This topic has been discussed in the past. eg: 3 years ago @
> http://mailman.nginx.org/pipermail/nginx/2014-November/045738.html and
> nginx couldn't fix it due to OpenSSL.
> Has anything changed since then, with newer versions of OpenSSL?
>
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