Question

Is it OK if the same OpenSSL context is used by several different accepting sockets?

In particular I’m using the same boost::asio::ssl::context with 2 different listening sockets.

Answer 1

Yep, SSL_CTX–which I believe is the underlying data structure–is just a global data structure used by your program. From ssl(3):

SSL_CTX (SSL Context)

That’s the global context structure which is created by a server or client once per program life-time and which holds mainly default values for the SSL structures which are later created for the connections.