2020-12-1

陈嘉乐

2020-12-01 e08a444a9d7acea0cf39f50d22d29179f6a59292

 HDL_ON/DAL/Mqtt/MqttClient.cs

New file
@@ -0,0 +1,802 @@
/*
更新了EMQ连接方式
*/
using System.Collections.Generic;
using System;
using MQTTnet.Client;
using System.Threading.Tasks;
using Shared;
using MQTTnet;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using HDL_ON.DriverLayer;

namespace HDL_ON.DAL.Mqtt
{
    public static class MqttClient
    {
        /// <summary>
        /// 加密通讯KEY
        /// </summary>
        static string mqttEncryptKey = "";
        //static string checkGatewayTopicBase64 = "";

        /// <summary>
        /// 挤下线主题
        /// </summary>
        static readonly string PushNotifySqueeze = "/Push/NotifySqueeze";

        /// <summary>
        /// 随机Key
        /// </summary>
        static string RandomKey = "";

        static string GetRandomKey()
        {
            if (string.IsNullOrEmpty(RandomKey))
            {
                //随机2位字符串
                Random random = new Random(Guid.NewGuid().GetHashCode());
                int num = random.Next(65, 91);
                RandomKey = Convert.ToChar(num).ToString();
            }

            return RandomKey;

        }

        /// <summary>
        /// 远程MqttClient
        /// </summary>
        public static IMqttClient RemoteMqttClient = new MqttFactory().CreateMqttClient();

        /// <summary>
        /// 推送标识
        /// </summary>
        static string PushSignStr = DateTime.Now.Ticks.ToString();

        /// <summary>

        /// 断开远程Mqtt的链接

        /// </summary>
        static async Task DisConnectRemoteMqttClient(string s = "")

        {

            try
            {

                if (remoteIsConnected)
                {
                    remoteIsConnected = false;
                    isSubscribeSuccess = false;
                    Utlis.WriteLine($"Remote主动断开_{s}");

                    //await RemoteMqttClient.DisconnectAsync(new MQTTnet.Client.Disconnecting.MqttClientDisconnectOptions { }, CancellationToken.None);

                    await RemoteMqttClient.DisconnectAsync();

                    if (Control.Ins.IsRemote)
                    {
                        Control.Ins.GatewayOnline = false;
                    }
                }

            }
            catch (Exception e)
            {
                Utlis.WriteLine($"Remote断开通讯连接出异常:{e.Message}");

            }

        }

        /// <summary>

        /// 断开远程Mqtt的链接

        /// </summary>
        static async Task DisConnectRemoteMqttClientWhenStart(string s = "")

        {
            try
            {
                remoteIsConnected = false;
                isSubscribeSuccess = false;
                Utlis.WriteLine($"RemoteStart主动断开_{s}");
                await RemoteMqttClient.DisconnectAsync();
            }
            catch (Exception e)
            {
                Utlis.WriteLine($"RemoteStart断开通讯连接出异常:{e.Message}");

            }
        }

        /// <summary>
        /// 断开mqtt连接
        /// </summary>
        /// <param name="s">断开原因</param>
        /// <param name="reset">是否需要去中心服务器 重新获取参数</param>
        /// <returns></returns>
        public static async Task DisConnectRemote(string s = "", bool reset = true)
        {
            if (reset)
            {
                MqttInfoConfig.Current.IfGetMqttInfoSuccess = false;
            }
            await DisConnectRemoteMqttClient(s);
        }

        /// <summary>
        /// 外网的MQTT是否正在连接
        /// </summary>
        public static bool remoteMqttIsConnecting;
        static bool remoteIsConnected;

        static MqttClient()
        {
            InitMqtt();
        }

        public static bool IsInitMqtt = false;

        static void InitMqtt()
        {
            new System.Threading.Thread(async () => {
                while (true)
                {
                    try
                    {
                        System.Threading.Thread.Sleep(500);
                        if (!Control.Ins.IsRemote) continue;

                        await StartCloudMqtt();
                        await SubscribeTopics();
                    }
                    catch { }
                }
            })
            { IsBackground = true }.Start();
        }

        /// <summary>
        /// 初始化状态
        /// </summary>
        public static void InitState()
        {
            IfNeedReadAllDeviceStatus = true;
            StartCloudMqtt();
        }

        static bool isSubscribeSuccess;
        static async Task SubscribeTopics()
        {
            if (remoteIsConnected && !isSubscribeSuccess)
            {
                try
                {
                    //2020-05-14 订阅主题质量改为0
                    var topicFilterBusGateWayToClient = new MqttTopicFilter()
                    {
                        Topic = $"/BusGateWayToClient/{MqttInfoConfig.Current.HomeGatewayInfo.id}/#",
                        QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce
                        //QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.ExactlyOnce
                    };

                    var topicFilterPush2 = new MqttTopicFilter
                    {
                        Topic = $"/BusGateWayToClient/{UserInfo.Current.ID}/#",
                        QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce,
                        //QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.ExactlyOnce
                    };

                    Utlis.WriteLine("开始订阅！");
                    var result = await RemoteMqttClient.SubscribeAsync(new MqttTopicFilter[] { topicFilterBusGateWayToClient, topicFilterPush2 });
                    if (result.Items[0].ResultCode == MQTTnet.Client.Subscribing.MqttClientSubscribeResultCode.GrantedQoS0)
                    {
                        isSubscribeSuccess = true;
                        Utlis.WriteLine("订阅成功！");

                        MqttRemoteSend(new byte[] { 0 }, 3);

                        //连接成功后检测是否需要通过远程获取Key
                        //CheckIfNeedGetLocalPasswordFromRemote();
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("订阅catch:" + ex.Message.ToString());
                }
            }
        }

        /// <summary>
        /// 启动远程Mqtt
        /// </summary>
        public static async Task StartCloudMqtt()
        {

            if (OnAppConfig.Instance.internetStatus == 0)
            {
                return;
            }

            if (!UserInfo.Current.IsLogin)
            {
                return;
            }

            //追加：没有远程连接的权限
            if (remoteMqttIsConnecting || remoteIsConnected)
            {
                return;
            }

            Utlis.WriteLine($"StartCloudMqtt: 开始");

            await Task.Factory.StartNew(async () => {
                try
                {
                    #region 初始化远程Mqtt

                    RemoteMqttClient = new MqttFactory().CreateMqttClient();


                    //(1)当[连接云端的Mqtt成功后]或者[以及后面App通过云端Mqtt转发数据给网关成功后],处理接收到云端数据包响应时在mqttServerClient_ApplicationMessageReceived这个方法处理
                    if (RemoteMqttClient.ApplicationMessageReceivedHandler == null)
                    {
                        //处理接收到的数据
                        RemoteMqttClient.UseApplicationMessageReceivedHandler((e) => {
                            try
                            {
                                var topic = e.ApplicationMessage.Topic;
                                if (topic == $"/BusGateWayToClient/{UserInfo.Current.ID}" + PushNotifySqueeze)
                                {
                                    var mMes = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
                                    //新挤下线主题方案 收到挤下线主题
                                    ReceiveNotifySqueezeAsync(mMes);
                                }
                                else if (topic == $"/BusGateWayToClient/{MqttInfoConfig.Current.HomeGatewayInfo.id}/NotifyBusGateWayInfoChange")
                                {//网关上线，需要更新aeskey
                                    //收到网关上线消息主题
                                    ReceiveNotifyBusGateWayInfoChange();
                                }
                                else if (topic == $"/BusGateWayToClient/{MqttInfoConfig.Current.HomeGatewayInfo.id}/NotifyGateWayOffline")
                                {//网关掉线
                                    //----第二步：读取账号下面的网关列表
                                    ReceiveNotifyGateWayOffline();
                                }
                                else if (topic == $"/BusGateWayToClient/{MqttInfoConfig.Current.HomeGatewayInfo.id}/Common/CheckGateway")
                                {
                                    var ss = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
                                    ReceiveCheckGateway(ss);
                                }
                                else
                                {
                                    SetGatewayOnlineResetCheck();
                                    if (Entity.DB_ResidenceData.residenceData.GatewayType == 0)
                                    {
                                        var packet = new Packet();

                                        if (!string.IsNullOrEmpty(mqttEncryptKey))
                                        {
                                            packet.Bytes = Securitys.EncryptionService.AesDecryptPayload(e.ApplicationMessage.Payload, mqttEncryptKey);
                                        }
                                        else
                                        {
                                            packet.Bytes = e.ApplicationMessage.Payload;
                                        }
                                        packet.Manager();
                                    }
                                    else
                                    {
                                        //A协议数据处理
                                    }
                                }
                            }
                            catch { }
                        });
                    }

                    //(2)DisconnectedHandler
                    if (RemoteMqttClient.DisconnectedHandler == null)
                    {
                        RemoteMqttClient.UseDisconnectedHandler(async (e) => {
                            Utlis.WriteLine($"远程连接断开");
                            isSubscribeSuccess = false;
                            await DisConnectRemoteMqttClient("UseDisconnectedHandler");
                        });
                    }
                    //(3)ConnectedHandler
                    if (RemoteMqttClient.ConnectedHandler == null)
                    {
                        RemoteMqttClient.UseConnectedHandler(async (e) => {
                            IfNeedReadAllDeviceStatus = true;
                            Utlis.WriteLine($"============>Mqtt远程连接成功");
                            SendPushSignOut();

                            //if (Control.Ins.IsRemote) {
                            //    //Utlis.ShowAppLinkStatus (AppLinkStatus.CloudLink);
                            //    MainPage.AddTip (Language.StringByID (SimpleControl.R.MyInternationalizationString.LinkSuccess));
                            //}
                        });
                    }
                    #endregion
                    //}

                    //(4)===========开始连接过程==========
                    //之前已经获取参数成功过
                    if (MqttInfoConfig.Current.IfGetMqttInfoSuccess)
                    {
                        //判断是否需要重新获取
                        await CheckMQTTConnectAsync();
                    }
                    else
                    {
                        //开始获取远程连接参数
                        await StartMQTTGetInfo();
                    }

                }
                catch (Exception ex)
                {
                    Utlis.WriteLine($"error:" + ex.Message);
                }
                finally
                {
                    //最终要释放连接状态
                    remoteMqttIsConnecting = false;

                    Utlis.WriteLine($"StartCloudMqtt: 结束");
                }

            });
        }


        /// <summary>
        /// 检测是否需要发送刷新获取所有设备的命令
        /// </summary>
        static void CheckIfNeedReadAllDeviceStatus()
        {
            if (IfNeedReadAllDeviceStatus)
            {
                Utlis.WriteLine("ReadAllDeviceStatus");
                IfNeedReadAllDeviceStatus = false;
            }
        }


        /// <summary>
        /// 检测之前获取的Mac与当前住宅MAC是否一致 不一致从新获取
        /// </summary>
        /// <returns></returns>
        static async Task CheckMQTTConnectAsync()
        {
            try
            {
                if (MqttInfoConfig.Current.HomeGatewayInfo != null && MqttInfoConfig.Current.HomeGatewayInfo.mac == Entity.DB_ResidenceData.residenceData.residenceGatewayMAC)
                {
                    await MQTTConnectAsync();
                }
                else
                {
                    //Mac 变化了重新获取参数
                    await StartMQTTGetInfo();
                }
            }
            catch
            {
                MqttInfoConfig.Current.IfGetMqttInfoSuccess = false;
            }

        }

        /// <summary>
        /// 开始获取Mqtt 远程参数
        /// </summary>
        /// <returns></returns>
        static async Task StartMQTTGetInfo()
        {
            if (!Control.Ins.IsRemote)
            {
                return;
            }

            await GetMqttInfoAndMQTTConnectAsync();

            ////--判断是当前是否分享的住宅
            //if (!UserConfig.Instance.CurrentRegion.IsOthreShare) {
            //    //主账号获取MQTT 远程链接信息，并连接
            //    await GetMqttInfoAndMQTTConnectAsync ();
            //} else {
            //    //如果是分享过来的住宅 走下面流程
            //    //--第一步：获取当前住分享宅网关信息并连接MQTT
            //    await GetSingleHomeGatewayPaggerAndMQTTConnectAsync ();
            //}
        }

        /// <summary>
        /// 连接MQTT
        /// </summary>
        static async Task MQTTConnectAsync()
        {

            if (!Control.Ins.IsRemote)
            {
                return;
            }

            if (MqttInfoConfig.Current.HomeGatewayInfo != null && MqttInfoConfig.Current.mMqttInfo != null)
            {
                try
                {

                    var url = MqttInfoConfig.Current.mMqttInfo.url;

                    //url = HttpUtil.GetProxyEMQUrl (url);
                    //#if DEBUG
                    //                   url = HttpUtil.GetProxyEMQUrl (url);

                    //#endif
                    var clientId = MqttInfoConfig.Current.mMqttInfo.clientId;
                    var username = MqttInfoConfig.Current.mMqttInfo.userName;
                    var passwordRemote = MqttInfoConfig.Current.mMqttInfo.passWord;
                    //获取参数成功，保存到本地并标记为true
                    MqttInfoConfig.Current.IfGetMqttInfoSuccess = true;
                    MqttInfoConfig.Current.Save();

                    mqttEncryptKey = MqttInfoConfig.Current.HomeGatewayInfo.aesKey;

                    var options1 = new MQTTnet.Client.Options.MqttClientOptionsBuilder()
                                        .WithClientId(clientId)
                                        .WithTcpServer(url.Split(':')[1].Substring("//".Length), int.Parse(url.Split(':')[2]))
                                        .WithCredentials(username, passwordRemote)
                                        .WithCleanSession()
                                        .WithProtocolVersion(MQTTnet.Formatter.MqttProtocolVersion.V311)
                                        .WithCommunicationTimeout(new TimeSpan(0, 0, 10))
                                        //.WithCommunicationTimeout (new TimeSpan (0, 0, 5))
                                        //.WithCommunicationTimeout (new TimeSpan (0, 1, 0))
                                        .Build();

                    await DisConnectRemoteMqttClient("StartRemoteMqtt");

                    var mResult = await RemoteMqttClient.ConnectAsync(options1);

                    if (mResult.ResultCode == MQTTnet.Client.Connecting.MqttClientConnectResultCode.Success)
                    {
                        remoteIsConnected = true;
                        IsDisConnectingWithSendCatch = false;
                    }
                    else
                    {
                        //重新中心服务器获取参数标记
                        MqttInfoConfig.Current.IfGetMqttInfoSuccess = false;
                    }

                }
                catch (Exception ex)
                {

                    //重新中心服务器获取参数标记
                    MqttInfoConfig.Current.IfGetMqttInfoSuccess = false;
                    Console.WriteLine("Connect error: " + ex.Message);
                }
                finally
                {

                }

            }
            else
            {
                MqttInfoConfig.Current.IfGetMqttInfoSuccess = false;
            }

        }

        /// <summary>
        /// 收到网关上线消息
        /// </summary>
        static void ReceiveNotifyBusGateWayInfoChange()
        {
            try
            {
                SetGatewayOnlineResetCheck();
                if (Control.Ins.IsRemote)
                {
                    CheckIfNeedReadAllDeviceStatus();
                }

            }
            catch { }
        }

        /// <summary>
        /// 收到网关掉线信息
        /// </summary>
        static void ReceiveNotifyGateWayOffline()
        {
            if (Control.Ins.IsRemote)
            {
                Control.Ins.GatewayOnline = false;
            }
        }


        /// <summary>
        /// 收到挤下线推送
        /// </summary>
        static void ReceiveNotifySqueezeAsync(string mMes)
        {

            if (mMes == PushSignStr) return;//是自己的登录推送不处理

            //断开远程连接
            Control.Ins.IsRemote = false;
            if (!UserInfo.Current.IsLogin)
            {
                return;
            }

            DisConnectRemoteMqttClient("挤下线");

            UserInfo.Current.LastTime = DateTime.MinValue;
            UserInfo.Current.SaveUserInfo();

            Application.RunOnMainThread(() => {
                MainPage.GoLoginPage(UserInfo.Current);
                //弹窗提示被挤下线
            });

            //2020-08-11 删除推送数据
            //HDLRequest.Current.PushserivceSignOut ();
        }

        /// <summary>
        /// 收到CheckGateway主题
        /// </summary>
        static void ReceiveCheckGateway(string mMes)
        {
            if (!Control.Ins.IsRemote) return;

            Utlis.WriteLine("ReceiveCheckGateway！");

            //CheckIfNeedReadAllDeviceStatus ();

            //var obj = Newtonsoft.Json.JsonConvert.DeserializeObject<ResponsePack>(mMes);
            Control.Ins.GatewayOnline = true;
        }

        /// <summary>
        /// 推送挤下线主题
        /// </summary>
        static void SendPushSignOut()
        {
            byte[] message = Encoding.UTF8.GetBytes(PushSignStr);
            MqttRemoteSend(message, 4);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="message">附加数据包</param>
        /// <param name="optionType">操作类型：0=网关控制；1=订阅网关数据;2=订阅网关上线数据</param>
        /// <returns></returns>
        public static async Task MqttRemoteSend(byte[] message, int optionType = 0)
        {
            //return;

            try
            {
                string topicName;
                switch (optionType)
                {
                    case 0:
                        topicName = $"/ClientToBusGateWay/{MqttInfoConfig.Current.HomeGatewayInfo.id}/Common/ON";
                        if (!string.IsNullOrEmpty(mqttEncryptKey))
                        {
                            message = Securitys.EncryptionService.AesEncryptPayload(message, mqttEncryptKey);
                        }
                        await RemoteMqttClient.PublishAsync(new MqttApplicationMessage { Topic = topicName, Payload = message, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                        break;
                    case 3:
                        topicName = $"/ClientToBusGateWay/{MqttInfoConfig.Current.HomeGatewayInfo.id}/Common/CheckGateway";
                        Utlis.WriteLine("CheckGateway");
                        await RemoteMqttClient.PublishAsync(new MqttApplicationMessage { Topic = topicName, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                        break;
                    case 4://发布新方案的挤下线主题
                        topicName = $"/BusGateWayToClient/{UserInfo.Current.ID}" + PushNotifySqueeze;
                        //message = Encoding.UTF8.GetBytes (PushSignStr);
                        await RemoteMqttClient.PublishAsync(new MqttApplicationMessage { Topic = topicName, Payload = message, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                        break;
                }
            }
            catch (Exception e)
            {
                //Utlis.WriteLine ($"============>Mqtt MqttRemoteSend catch");
                if (!IsDisConnectingWithSendCatch)
                {
                    IsDisConnectingWithSendCatch = true;
                    await DisConnectRemoteMqttClient("SendCatch");
                }
            }
        }
        /// <summary>
        /// SendCatch 后执行一次断开操作
        /// </summary>
        static bool IsDisConnectingWithSendCatch = false;


        /// <summary>
        /// 是否需要读取一次所有设备状态
        /// </summary>
        static bool IfNeedReadAllDeviceStatus = true;
        //public static bool IsGatewayOnline = true;

        /// <summary>
        /// 设置网关在线标志，并重置CheckGateway参数
        /// </summary>
        static void SetGatewayOnlineResetCheck()
        {
            if (Control.Ins.IsRemote)
            {
                Control.Ins.GatewayOnline = true;
            }
        }


        /// <summary>
        /// 主账号获取MQTT 远程链接信息，并连接
        /// </summary>
        /// <returns></returns>
        static async Task GetMqttInfoAndMQTTConnectAsync()
        {
            var mqttInfoRequestResult_Obj = new Server.HttpServerRequest().GetMqttRemoteInfo(GetRandomKey());
            if (mqttInfoRequestResult_Obj != null)
            {
                MqttInfoConfig.Current.mMqttInfo = mqttInfoRequestResult_Obj;
                await MQTTConnectAsync();
            }
        }

    }
}


public class MqttInfo
{
    /// <summary>
    /// 
    /// </summary>
    public string url;
    /// <summary>
    /// 
    /// </summary>
    public string clientId;
    /// <summary>
    /// 
    /// </summary>
    public string userName;
    /// <summary>
    /// 
    /// </summary>
    public string passWord;
}



namespace Securitys
{
    public partial class EncryptionService
    {

        #region 加密
        /// <summary>
        /// 加密主题为Base64
        /// </summary>
        /// <param name="pToEncrypt"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesEncryptTopic(string pToEncrypt, string key)
        {
            if (string.IsNullOrEmpty(pToEncrypt)) return null;
            if (string.IsNullOrEmpty(key)) return pToEncrypt;
            //需要加密内容的明文流
            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(pToEncrypt);

            //配置AES加密Key(密钥、向量、模式、填充)
            RijndaelManaged rm = new RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES加密器对象
            ICryptoTransform cTransform = rm.CreateEncryptor();

            //使用AES将明文流转成密文字节数组
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            //将AES生成的密文字节数组转成Base64字符串
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }


        /// <summary>
        /// 加密负载为二进制流
        /// </summary>
        /// <param name="toEncryptArray"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static byte[] AesEncryptPayload(byte[] toEncryptArray, string key)
        {
            if (string.IsNullOrEmpty(key)) return toEncryptArray;
            //配置AES加密Key(密钥、向量、模式、填充)
            var rm = new RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES加密器对象
            var cTransform = rm.CreateEncryptor();
            //使用AES将明文流转成密文字节数组
            return cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
        }
        #endregion


        #region 解密
        /// <summary>
        /// 解密主题数据
        /// </summary>
        /// <param name="pToDecrypt"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesDecryptTopic(string pToDecrypt, string key)
        {
            //AES密文Base64转成字符串
            Byte[] toEncryptArray = Convert.FromBase64String(pToDecrypt);

            //配置AES加密Key(密钥、向量、模式、填充)
            RijndaelManaged rm = new RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES解密器对象
            ICryptoTransform cTransform = rm.CreateDecryptor();

            //使用AES将密文流转成明文的字节数组
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            //转成字符串
            return Encoding.UTF8.GetString(resultArray);
        }

        /// <summary>
        /// 采用Aes解密负载数据
        /// </summary>
        /// <param name="toEncryptArray"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static byte[] AesDecryptPayload(byte[] toEncryptArray, string key)
        {
            //配置AES加密Key(密钥、向量、模式、填充)
            var rm = new RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES解密器对象
            var cTransform = rm.CreateDecryptor();

            //使用AES将密文流转成明文的字节数组
            return cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
        }
        #endregion



    }
}