The examples I have seen in the go-tpm repo seem to make the keys using go-tpm with functions like CreatePrimary and then pass the key handle returned by CreatePrimary into other functions like Sign.
SSL_CTX_set_default_ctlog_list_file() loads a list of Certificate Transparency (CT) logs from the default file location, "ct_log_list.cnf", found in the directory where OpenSSL is installed.