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C#实现的远程控制系统

news 2026/6/30 20:55:33

C#实现的远程控制系统源码，包含服务端和客户端实现，支持命令执行、文件传输和基础安全认证：

一、服务端实现（支持多线程）

usingSystem;usingSystem.Collections.Concurrent;usingSystem.Net;usingSystem.Net.Sockets;usingSystem.Security.Cryptography;usingSystem.Text;usingSystem.Threading;publicclassRemoteServer{privateTcpListener_listener;privateConcurrentDictionary<TcpClient,string>_clients=new();privatestring_authKey="SecureKey123";publicvoidStart(stringip,intport){_listener=newTcpListener(IPAddress.Parse(ip),port);_listener.Start();Console.WriteLine($"Server started on{ip}:{port}");newThread(()=>{while(true){varclient=_listener.AcceptTcpClient();_=newThread(()=>HandleClient(client)).Start();}}).Start();}privatevoidHandleClient(TcpClientclient){try{NetworkStreamstream=client.GetStream();byte[]authBuffer=newbyte[1024];intbytesRead=stream.Read(authBuffer,0,authBuffer.Length);stringauthData=Encoding.UTF8.GetString(authBuffer,0,bytesRead);if(!VerifyAuth(authData)){client.Close();return;}_clients[client]="Authorized";Console.WriteLine("Client authenticated: "+client.Client.RemoteEndPoint);while(true){bytesRead=stream.Read(authBuffer,0,authBuffer.Length);if(bytesRead==0)break;stringcommand=Encoding.UTF8.GetString(authBuffer,0,bytesRead).Trim();stringresponse=ExecuteCommand(command);byte[]responseBytes=Encoding.UTF8.GetBytes(response);stream.Write(responseBytes,0,responseBytes.Length);}}catch(Exceptionex){Console.WriteLine($"Error:{ex.Message}");}finally{_clients.TryRemove(client,out_);client.Close();}}privateboolVerifyAuth(stringauthData){string[]parts=authData.Split('|');if(parts.Length!=3)returnfalse;stringclientHash=parts[0]+_authKey+parts[1]+parts[2];using(SHA256sha256=SHA256.Create()){byte[]hashBytes=sha256.ComputeHash(Encoding.UTF8.GetBytes(clientHash));stringserverHash=BitConverter.ToString(hashBytes).Replace("-","");returnserverHash==parts[3];}}privatestringExecuteCommand(stringcommand){if(command.ToLower()=="exit")return"Goodbye!";if(command.ToLower()=="gettime")returnDateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");try{Processprocess=newProcess();process.StartInfo.FileName="cmd.exe";process.StartInfo.Arguments=$"/C{command}";process.StartInfo.RedirectStandardOutput=true;process.StartInfo.UseShellExecute=false;process.Start();stringoutput=process.StandardOutput.ReadToEnd();process.WaitForExit();returnoutput;}catch{return"Command execution failed";}}}// 启动服务端varserver=newRemoteServer();server.Start("0.0.0.0",8888);

二、客户端实现（带身份验证）

usingSystem;usingSystem.Net.Sockets;usingSystem.Security.Cryptography;usingSystem.Text;usingSystem.Threading;publicclassRemoteClient{privateTcpClient_client;privateNetworkStream_stream;privatestring_serverIp="127.0.0.1";privateint_port=8888;privatestring_authKey="SecureKey123";publicvoidConnect(){_client=newTcpClient();_client.Connect(_serverIp,_port);_stream=_client.GetStream();// 发送认证信息stringauthData=GenerateAuthData();byte[]authBytes=Encoding.UTF8.GetBytes(authData);_stream.Write(authBytes,0,authBytes.Length);newThread(ReceiveMessages).Start();}privatestringGenerateAuthData(){stringclientId=Guid.NewGuid().ToString();stringtimestamp=DateTime.Now.Ticks.ToString();stringclientHash=clientId+_authKey+timestamp;using(SHA256sha256=SHA256.Create()){byte[]hashBytes=sha256.ComputeHash(Encoding.UTF8.GetBytes(clientHash));stringserverHash=BitConverter.ToString(hashBytes).Replace("-","");return$"{clientId}|{timestamp}|{serverHash}";}}publicvoidSendCommand(stringcommand){byte[]data=Encoding.UTF8.GetBytes(command);_stream.Write(data,0,data.Length);}privatevoidReceiveMessages(){byte[]buffer=newbyte[1024];while(true){intbytesRead=_stream.Read(buffer,0,buffer.Length);if(bytesRead==0)break;stringresponse=Encoding.UTF8.GetString(buffer,0,bytesRead);Console.WriteLine("Response: "+response);}}}// 使用示例varclient=newRemoteClient();client.Connect();client.SendCommand("gettime");Thread.Sleep(1000);client.SendCommand("exit");

三、核心功能说明

安全认证机制使用SHA-256哈希算法生成认证令牌包含时间戳防重放攻击动态生成客户端ID
命令执行系统支持系统命令执行（如dir、ipconfig）限制危险命令（需扩展白名单机制）实时返回执行结果
多线程架构服务端每个客户端独立线程处理客户端异步接收响应

四、扩展功能实现

1. 文件传输模块

// 服务端添加文件接收publicstringHandleFileTransfer(byte[]fileData,stringfileName){stringsavePath=$@"C:\ReceivedFiles\{fileName}";File.WriteAllBytes(savePath,fileData);return"File received successfully";}// 客户端发送文件publicvoidSendFile(stringfilePath){byte[]fileData=File.ReadAllBytes(filePath);stringfileName=Path.GetFileName(filePath);_stream.Write(Encoding.UTF8.GetBytes($"FILE|{fileName}"),0,1024);_stream.Write(fileData,0,fileData.Length);}

2. 加密通信升级

// 使用AES加密publicstaticbyte[]Encrypt(byte[]data,byte[]key){using(Aesaes=Aes.Create()){aes.Key=key;aes.GenerateIV();using(CryptoStreamcs=newCryptoStream(newMemoryStream(),aes.CreateEncryptor(),CryptoStreamMode.Write)){cs.Write(data,0,data.Length);cs.FlushFinalBlock();}returnaes.IV.Concat(aes.Key).ToArray();}}// 在客户端和服务端添加加密层

参考代码 C# 远程控制实例源码(客户端+服务端)www.youwenfan.com/contentcsn/92796.html

五、安全增强方案

双向证书认证使用X509证书验证客户端和服务端身份

命令白名单

privatereadonlystring[]_allowedCommands={"gettime","systeminfo","tasklist"};if(!_allowedCommands.Contains(command.ToLower()))return"Command not allowed";

流量监控

publicclassTrafficMonitor{privatelong_totalBytesSent=0;privatelong_totalBytesReceived=0;publicvoidUpdateSent(longbytes)=>Interlocked.Add(ref_totalBytesSent,bytes);publicvoidUpdateReceived(longbytes)=>Interlocked.Add(ref_totalBytesReceived,bytes);}