[asd2r23dasd]

When you're that small it really requires more context. What are you trying to do?

I've deployed TLS in 50 KiB flash and 6 Kb RAM. But I could rely on hardware support for some public key operations and could pick a single ciphersuite, and controlled the server end as well.

The boring answer is that you'll need to identify the set of primitives you need and then find a library that matches. I can't think of any single primitive that would break that budget, so it'll depend on how many you need!