■ TcpListener 클래스에서 TCP 서버를 사용하는 방법을 보여준다.
[TestServer 프로젝트]
▶ MainForm.cs
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using System; using System.IO; using System.Net; using System.Net.Sockets; using System.Security.Cryptography; using System.Text; using System.Threading; using System.Windows.Forms; namespace TestServer { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// TCP 리스너 /// </summary> private TcpListener tcpListener; /// <summary> /// TCP 클라이언트 /// </summary> private TcpClient tcpClient; /// <summary> /// 네트워크 스트림 /// </summary> private NetworkStream networkStream; /// <summary> /// 스트림 라이터 /// </summary> private StreamWriter streamWriter; /// <summary> /// 서버 작업 여부 /// </summary> private bool isServerWorking = false; /// <summary> /// 스레드 /// </summary> private Thread thread; /// <summary> /// 트리플 DES 암호 서비스 공급자 /// </summary> private TripleDESCryptoServiceProvider tripleDESCryptoServiceProvider = new TripleDESCryptoServiceProvider(); /// <summary> /// 개인 키 바이트 배열 /// </summary> private byte[] privateKeyByteArray = new byte[] { 98 , 45 , 125, 56, 1 , 60 , 11, 38 , 123, 54 , 234, 9 , 76, 20 , 44, 7 , 12 , 223, 219, 95, 48, 156, 32, 239 }; /// <summary> /// 개인 키 초기 값 바이트 배열 /// </summary> private byte[] privateKeyInitialValueByteArray = new byte[] { 67, 12, 3, 41, 66, 78, 34, 123 }; /// <summary> /// 난수기 /// </summary> Random random = new Random(); /// <summary> /// 임의 값 /// </summary> private int randomValue = 0; /// <summary> /// 임의 개인 키 바이트 배열 /// </summary> private byte[] randomPrivateKeyByteArray = null; /// <summary> /// 임의 개인 키 초기 값 바이트 배열 /// </summary> private byte[] randomPrivateKeyInitialValueByteArray = null; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. this.Load += Form_Load; this.FormClosing += Form_FormClosing; this.sendButton.Click += sendButton_Click; this.timer.Tick += timer_Tick; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e"></param> private void Form_Load(object sender, EventArgs e) { this.isServerWorking = true; IPAddress ipAddress = new IPAddress(0); this.tcpListener = new TcpListener(ipAddress, 2014); this.tcpListener.Start(); this.thread = new Thread(StartServer); this.thread.Start(); this.timer.Enabled = true; this.randomValue = this.random.Next(1, 9); SetRandomPrivateKeyByteArray(this.randomValue); } #endregion #region 폼을 닫을 경우 처리하기 - Form_FormClosing(sender, e) /// <summary> /// 폼을 닫을 경우 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_FormClosing(object sender, FormClosingEventArgs e) { if(!(this.streamWriter == null)) { try { this.streamWriter.WriteLine(Encrypt("서버를 종료합니다.")); this.streamWriter.Flush(); } catch { } } this.isServerWorking = false; this.timer.Enabled = false; if(!(this.streamWriter == null)) { this.streamWriter.Close(); } if(!(this.networkStream == null)) { this.networkStream.Close(); } if(!(this.tcpClient == null)) { this.tcpClient.Close(); } if(!(this.tcpListener == null)) { this.tcpListener.Stop(); } if(!(this.thread == null)) { this.thread.Abort(); } Application.ExitThread(); } #endregion #region 송신 버튼 클릭시 처리하기 - sendButton_Click(sender, e) /// <summary> /// 송신 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void sendButton_Click(object sender, EventArgs e) { if(this.networkStream != null && this.streamWriter != null) { this.streamWriter.WriteLine(Encrypt("12345abcde")); this.streamWriter.Flush(); } } #endregion #region 타이머 틱 처리하기 - timer_Tick(sender, e) /// <summary> /// 타이머 틱 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void timer_Tick(object sender, EventArgs e) { SendTimeMessage(); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 임의 개인 키 바이트 배열 설정하기 - SetRandomPrivateKeyByteArray(randomValue) /// <summary> /// 임의 개인 키 바이트 배열 설정하기 /// </summary> /// <param name="randomValue">임의 값</param> private void SetRandomPrivateKeyByteArray(int randomValue) { randomPrivateKeyByteArray = new byte[this.privateKeyByteArray.Length]; randomPrivateKeyInitialValueByteArray = new byte[this.privateKeyInitialValueByteArray.Length]; for(int i = 0; i < this.privateKeyByteArray.Length; i++) { int value = (int)this.privateKeyByteArray[i]; randomPrivateKeyByteArray[i] = Convert.ToByte(value / randomValue); } for(int i = 0; i < this.privateKeyInitialValueByteArray.Length; i++) { int value = (int)this.privateKeyInitialValueByteArray[i]; randomPrivateKeyInitialValueByteArray[i] = Convert.ToByte(value / randomValue); } } #endregion #region 메시지 박스 데이터 추가하기 - AddMessageTextBoxData(text) /// <summary> /// 메시지 박스 데이터 추가하기 /// </summary> /// <param name="text">텍스트</param> private void AddMessageTextBoxData(string text) { this.messageTextBox.AppendText(text + "\r\n"); this.messageTextBox.Focus(); this.messageTextBox.ScrollToCaret(); } #endregion #region 서버 시작하기 - StartServer() /// <summary> /// 서버 시작하기 /// </summary> private void StartServer() { AddMessageTextBoxData("서버가 실행이 되었습니다."); while(this.isServerWorking) { try { this.tcpClient = this.tcpListener.AcceptTcpClient(); AddMessageTextBoxData("클라이언트가 접속하였습니다."); this.networkStream = this.tcpClient.GetStream(); this.streamWriter = new StreamWriter(this.networkStream); } catch { } } } #endregion #region 시간 메시지 송신하기 - SendTimeMessage() /// <summary> /// 시간 메시지 송신하기 /// </summary> private void SendTimeMessage() { try { string messageEncrypted = Encrypt(Convert.ToString(DateTime.Now)); this.streamWriter.WriteLine(messageEncrypted); this.streamWriter.Flush(); } catch { } } #endregion #region 암호화 하기 - Encrypt(message) /// <summary> /// 암호화 하기 /// </summary> /// <param name="message">메시지</param> /// <returns>암호화 메시지</returns> private string Encrypt(string message) { string messageEncrypted = null; byte[] textByteArray = UTF8Encoding.UTF8.GetBytes(message); messageEncrypted = Convert.ToBase64String ( this.tripleDESCryptoServiceProvider.CreateEncryptor ( randomPrivateKeyByteArray, randomPrivateKeyInitialValueByteArray ).TransformFinalBlock(textByteArray, 0, textByteArray.Length) ); textByteArray = UTF8Encoding.UTF8.GetBytes(this.randomValue.ToString() + messageEncrypted); messageEncrypted = Convert.ToBase64String ( this.tripleDESCryptoServiceProvider.CreateEncryptor ( this.privateKeyByteArray, this.privateKeyInitialValueByteArray ).TransformFinalBlock(textByteArray, 0, textByteArray.Length) ); return messageEncrypted; } #endregion } } |
[TestClient 프로젝트]
▶ MainForm.cs
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using System; using System.IO; using System.Net.Sockets; using System.Security.Cryptography; using System.Text; using System.Threading; using System.Windows.Forms; namespace TestClient { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// TCP 클라이언트 /// </summary> private TcpClient tcpClient; /// <summary> /// 네트워크 스트림 /// </summary> private NetworkStream networkStream; /// <summary> /// 스트림 리더 /// </summary> private StreamReader streamReader; /// <summary> /// 스레드 /// </summary> private Thread thread; /// <summary> /// 트리플 DES 암호 서비스 공급자 /// </summary> private TripleDESCryptoServiceProvider tripleDESCryptoServiceProvider = new TripleDESCryptoServiceProvider(); /// <summary> /// 개인 키 바이트 배열 /// </summary> private byte[] privateKeyByteArray = new byte[] { 98 , 45 , 125, 56, 1 , 60 , 11, 38 , 123, 54 , 234, 9 , 76, 20 , 44, 7 , 12 , 223, 219, 95, 48, 156, 32, 239 }; /// <summary> /// 개인 키 초기 값 바이트 배열 /// </summary> private byte[] privateKeyInitialValueByteArray = new byte[] { 67, 12, 3, 41, 66, 78, 34, 123 }; /// <summary> /// 임의 개인 키 바이트 배열 /// </summary> private byte[] randomPrivateKeyByteArray = null; /// <summary> /// 임의 개인 키 초기 값 바이트 배열 /// </summary> private byte[] randomPrivateKeyInitialValueByteArray = null; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. Load += Form_Load; FormClosing += Form_FormClosing; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { try { this.tcpClient = new TcpClient("127.0.0.1", 2014); AddMessageTextBoxData("서버에 접속 했습니다."); this.networkStream = this.tcpClient.GetStream(); this.streamReader = new StreamReader(this.networkStream); this.thread = new Thread(ReceiveMessage); this.thread.Start(); } catch { AddMessageTextBoxData("서버에 접속하지 못 했습니다."); } } #endregion #region 폼을 닫을 경우 처리하기 - Form_FormClosing(sender, e) /// <summary> /// 폼을 닫을 경우 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_FormClosing(object sender, FormClosingEventArgs e) { try { if(!(this.streamReader == null)) { this.streamReader.Close(); } if(!(this.networkStream == null)) { this.networkStream.Close(); } if(!(this.tcpClient == null)) { this.tcpClient.Close(); } if(!(this.thread == null)) { this.thread.Abort(); } } catch { return; } Application.ExitThread(); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 메시지 텍스트 박스 데이터 추가하기 - AddMessageTextBoxData(text) /// <summary> /// 메시지 텍스트 박스 데이터 추가하기 /// </summary> /// <param name="text">텍스트</param> private void AddMessageTextBoxData(string text) { this.messageTextBox.AppendText(text + "\r\n"); this.messageTextBox.Focus(); this.messageTextBox.ScrollToCaret(); } #endregion #region 임의 개인 키 바이트 배열 설정하기 - SetRandomPrivateKeyByteArray(randomValue) /// <summary> /// 임의 개인 키 바이트 배열 설정하기 /// </summary> /// <param name="randomValue">임의 값</param> private void SetRandomPrivateKeyByteArray(int randomValue) { this.randomPrivateKeyByteArray = new byte[this.privateKeyByteArray.Length]; this.randomPrivateKeyInitialValueByteArray = new byte[this.privateKeyInitialValueByteArray.Length]; for(int i = 0; i < this.privateKeyByteArray.Length; i++) { int value = (int)this.privateKeyByteArray[i]; this.randomPrivateKeyByteArray[i] = Convert.ToByte(value / randomValue); } for(int i = 0; i < this.privateKeyInitialValueByteArray.Length; i++) { int value = (int)this.privateKeyInitialValueByteArray[i]; this.randomPrivateKeyInitialValueByteArray[i] = Convert.ToByte(value / randomValue); } } #endregion #region 암호화 풀기 - Decrypt(messageEncrypted) /// <summary> /// 암호화 풀기 /// </summary> /// <param name="messageEncrypted">암호화 메시지</param> /// <returns>메시지</returns> private string Decrypt(string messageEncrypted) { string message = null; byte[] messageEncryptedByteArrat = Convert.FromBase64String(messageEncrypted); message = UTF8Encoding.UTF8.GetString ( this.tripleDESCryptoServiceProvider.CreateDecryptor ( this.privateKeyByteArray, this.privateKeyInitialValueByteArray ).TransformFinalBlock(messageEncryptedByteArrat, 0, messageEncryptedByteArrat.Length) ); SetRandomPrivateKeyByteArray(Convert.ToInt32(message.Substring(0, 1))); messageEncryptedByteArrat = Convert.FromBase64String(message.Substring(1, message.Length - 1)); message = UTF8Encoding.UTF8.GetString ( this.tripleDESCryptoServiceProvider.CreateDecryptor ( this.randomPrivateKeyByteArray, this.randomPrivateKeyInitialValueByteArray ).TransformFinalBlock(messageEncryptedByteArrat, 0, messageEncryptedByteArrat.Length) ); return message; } #endregion #region 메시지 수신하기 - ReceiveMessage() /// <summary> /// 메시지 수신하기 /// </summary> private void ReceiveMessage() { try { while(true) { if(this.networkStream.CanRead) { string messageEncrypted = this.streamReader.ReadLine(); if(messageEncrypted.Length > 0) { string message = Decrypt(messageEncrypted); AddMessageTextBoxData(message); } } } } catch { } } #endregion } } |
