Enable ssl/TLS communication in siebel custom secuirty adapter for external auth server

We have developed the customer security adapter for siebel using the provided sdk, now we want to communicate to authenticate server in SSL/TLS mode for https communication, we have used openssl lib to implement ssl communication between external authenticate server and siebel security plugin but is fail in ctxInit.

Siebel version : IP16

OS : Solaris 11.2

openssl : 1.2.0h

if we use method = (SSL_METHOD *) SSLv23_method();

then

SSL_CTX_new return the null context.

context1 = SSL_CTX_new(method);

and we are getting error in our log file :

4221201184:error:140F3042:lib(20):func(243):reason(66):ssl_lib.c:2621:

Or if we use

if we use method = (SSL_METHOD *) SSLv3_method();