tlsSocket.getX509Certificate()

• 返回：<X509Certificate>

将本地证书作为 <X509Certificate> 对象返回。

【Returns the local certificate as an <X509Certificate> object.】

如果没有本地证书，或者套接字已被销毁，将返回 undefined。

【If there is no local certificate, or the socket has been destroyed, undefined will be returned.】