> We are trying to support a server that would support PSK and SRP authentication mechanisms. [.] > Would multiple callbacks for different mechanisms work simultaneously on the same SSL context?
My quick answer is Yes. In a recent past I did some [multi-threaded] servers using both SRP and PSK on the same context and I don't recall having encountered any problem. I believe it was OpenSSL 1.1.1f using TLS 1.2 under Windows 32bits. Hope it helps, Michel.
