I have no issue with adding more functions to the OpenSSL extension, but they need to be very clearly documented and have an obvious API. Cryptic names such as $pk or $sk cannot be used. While I really hate array return types, if you must use it then it must be clearly documented. It cannot just be "shared secret (typically 32 bytes)". What does "typically" even mean? I assume the type for both would be a string, but that's not obvious.
The OpenSSL documentation is in pretty bad shape. Many functions are poorly documented and there are barely any examples. While I am sure there are people who know how to use it, it's a complete mystery to me and I presume many others.
