HarmonyOS 鸿蒙Next TLSSocket 如何建立双向安全认证连接

设置好所有参数后，一直报错 SSL is null ，代码如下：

let tls: socket.TLSSocket = socket.constructTLSSocketInstance(this.tcp);

        tls.on(‘message’, (value: socket.SocketMessageInfo) => {
          console.log(“tls on message”);

        });
        tls.on(“error”,(e: BusinessError) => {
          console.log(“tls on error”);
        })
        tls.on(‘connect’, () => {
          console.log(“tls on connect”);
        });
        tls.on(‘close’, () => {
          console.log(“tls on close”);
        });

        //服务端地址
        let serverAddress: socket.NetAddress = { address: “”, port: , family: 1 }
        //tls选项
        let opt: socket.TLSSecureOptions = {
          protocols: [socket.Protocol.TLSv12,socket.Protocol.TLSv13],
          ca: [-----BEGIN CERTIFICATE-----<br>xxx<br>-----END CERTIFICATE-----,

cert: -----BEGIN CERTIFICATE-----<br>xxx<br>-----END CERTIFICATE-----,

          key: -----BEGIN RSA PRIVATE KEY-----<br>xxx<br>-----END RSA PRIVATE KEY-----
        }

        tls.connect({
          address: serverAddress,
          secureOptions:opt
        }).then(() => {

        }).catch((e: BusinessError) => {
          console.log(“tls connect fail”)
        })