We have https://github.com/rustls/rustls though it doesn't aim to be especially OpenSSL compatible.
It has C bindings used in eg in this Apache httpd mod_tls: https://www.memorysafety.org/blog/memory-safe-httpd/
It has C bindings used in eg in this Apache httpd mod_tls: https://www.memorysafety.org/blog/memory-safe-httpd/
I will try this out next week to see I can get Apache to compile with mod_tls; should be interesting.