Perform SSL handshaking.
boost::system::error_code handshake( handshake_type type, boost::system::error_code & ec);
This function is used to perform SSL handshaking on the stream. The function call will block until handshaking is complete or an error occurs.
The type of handshaking to be performed, i.e. as a client or as a server.
Set to indicate what error occurred, if any.