In s_client there is already the -starttls option that does this on the client side. So you could implement the -starttls option similarly on the server side. Tomas Mraz, OpenSSL On Tue, 2023-09-26 at 12:11 +0200, Matthias Apitz wrote: > > Hello, > > Our C-written application servers, which are using OpenSSL, have a > clear text > GoodMorning message sent to an connecting client in the form of > this string (for example): > > 220 SLNP > CATServer@version:V7.3@user:sisis@pid:5234@charset:UTF-8@ssl:true > > i.e. the connecting client must first read from the socket this > GoodMorning message and when the server says in this line at the end > '@ssl:true' must then switch in the socket to SSL which the server > awaits also with SSL_accept(), BIO_gets(), ... > > This works nicely for many years. > > What I would like to have is a s_server version of OpenSSL where > this also sends out such GoogMorning message in ASCII before > switching to SSL, just for testing purpose for our Java written > application clients. > > What is the best place to hook into the sources such "plugin". > > Thanks > > matthias > > -- Tomáš Mráz, OpenSSL
