def _select_and_assign_certificate(self, connection: ssl.SSLSocket,
server_name: str,
ssl_context: SSLContext):
certificate = self.select_certificate(server_name)
new_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
new_context.load_cert_chain(certificate["pem_file"],
certificate["key_file"])
connection.context = new_context
self._server_name = certificate["server_name"]
self._logger.info("Successfully loaded TLS certificate and key")
