C#实现将聊天数据发送加密
芝麻粒儿 人气:0实践过程
效果
代码
public partial class Form1 : Form { public Form1() { InitializeComponent(); } #region 定义全局对象及变量 private IPEndPoint Server;//服务器端 private IPEndPoint Client;//客户端 private Socket mySocket;//套接字 private EndPoint ClientIP;//IP地址 byte[] buffer, data;//接收缓存 bool blFlag = true;//标识是否第一次发送信息 bool ISPort = false;//判断端口打开 int SendNum1, ReceiveNum1, DisNum1; //记录窗体加载时的已发送\已接收\丢失的数据报 int SendNum2, ReceiveNum2, DisNum2; //记录当前已发送\已接收\丢失的数据报 int SendNum3, ReceiveNum3, DisNum3; //缓存已发送\已接收\丢失的数据报 int port;//端口号 #endregion //异步接收信息 private void StartLister(IAsyncResult IAResult) { int Num = mySocket.EndReceiveFrom(IAResult, ref ClientIP); string strInfo = Encoding.Unicode.GetString(buffer, 0, Num); rtbContent.AppendText("用户" + ClientIP.ToString()); rtbContent.AppendText(":"); rtbContent.AppendText("\r\n"); rtbContent.AppendText(DecryptDES(strInfo, "mrsoftxk"));//对接收到的信息进行解密 rtbContent.AppendText("\r\n"); mySocket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref ClientIP, new AsyncCallback(StartLister), null); } //初始化已发送、已接收和丢失的数据报 private void Form1_Load(object sender, EventArgs e) { if (blFlag == true) { IPGlobalProperties NetInfo = IPGlobalProperties.GetIPGlobalProperties(); UdpStatistics myUdpStat = null; myUdpStat = NetInfo.GetUdpIPv4Statistics(); SendNum1 = Int32.Parse(myUdpStat.DatagramsSent.ToString()); ReceiveNum1 = Int32.Parse(myUdpStat.DatagramsReceived.ToString()); DisNum1 = Int32.Parse(myUdpStat.IncomingDatagramsDiscarded.ToString()); } } //设置端口号 private void button4_Click(object sender, EventArgs e) { try { port = Convert.ToInt32(textBox4.Text); CheckForIllegalCrossThreadCalls = false; buffer = new byte[1024]; data = new byte[1024]; Server = new IPEndPoint(IPAddress.Any, port); Client = new IPEndPoint(IPAddress.Broadcast, port); ClientIP = (EndPoint)Server; mySocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); mySocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1); mySocket.Bind(Server); mySocket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref ClientIP, new AsyncCallback(StartLister), null); ISPort = true;//打开指定端口号 } catch { } } //发送信息 private void button2_Click(object sender, EventArgs e) { if (ISPort == true)//判断是否有打开的端口号 { IPGlobalProperties NetInfo = IPGlobalProperties.GetIPGlobalProperties(); UdpStatistics myUdpStat = null; myUdpStat = NetInfo.GetUdpIPv4Statistics(); try { if (blFlag == false)//非第一次发送 { SendNum2 = Int32.Parse(myUdpStat.DatagramsSent.ToString()); ReceiveNum2 = Int32.Parse(myUdpStat.DatagramsReceived.ToString()); DisNum2 = Int32.Parse(myUdpStat.IncomingDatagramsDiscarded.ToString()); textBox1.Text = Convert.ToString(SendNum2 - SendNum3); textBox2.Text = Convert.ToString(ReceiveNum2 - ReceiveNum3); textBox3.Text = Convert.ToString(DisNum2 - DisNum3); } SendNum2 = Int32.Parse(myUdpStat.DatagramsSent.ToString()); ReceiveNum2 = Int32.Parse(myUdpStat.DatagramsReceived.ToString()); DisNum2 = Int32.Parse(myUdpStat.IncomingDatagramsDiscarded.ToString()); SendNum3 = SendNum2; //记录本次的发送数据报 ReceiveNum3 = ReceiveNum2;//记录本次的接收数据报 DisNum3 = DisNum2; //记录本次的丢失数据报 if (blFlag == true)//第一次发送 { textBox1.Text = Convert.ToString(SendNum2 - SendNum1); textBox2.Text = Convert.ToString(ReceiveNum2 - ReceiveNum1); textBox3.Text = Convert.ToString(DisNum2 - DisNum1); blFlag = false; } } catch (Exception ex) { MessageBox.Show(ex.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information); } string str = EncryptDES(rtbSend.Text, "mrsoftxk");//加密要发送的信息 data = Encoding.Unicode.GetBytes(str); mySocket.SendTo(data, data.Length, SocketFlags.None, Client); rtbSend.Text = ""; } else { MessageBox.Show("请首先打开端口!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); button4.Focus(); } } //清屏 private void button1_Click(object sender, EventArgs e) { rtbContent.Clear(); } //退出 private void button3_Click(object sender, EventArgs e) { Application.Exit(); } //按<Ctrl+Enter>组合键发送信息 private void rtbSend_KeyDown(object sender, KeyEventArgs e) { //当同时按下Ctrl和Enter时,发送消息 if (e.Control && e.KeyValue == 13) { e.Handled = true; button2_Click(this, null); } } //聊天记录随时滚动 private void rtbContent_TextChanged(object sender, EventArgs e) { rtbContent.ScrollToCaret(); } private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };//密钥 #region DES加密字符串 ///<summary> ///DES加密字符串 ///</summary> ///<param name="str">待加密的字符串</param> ///<param name="key">加密密钥,要求为8位</param> ///<returns>加密成功返回加密后的字符串,失败返回源字符串</returns> public string EncryptDES(string str, string key) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(key.Substring(0, 8)); byte[] rgbIV = Keys; byte[] inputByteArray = Encoding.UTF8.GetBytes(str); DESCryptoServiceProvider myDES = new DESCryptoServiceProvider(); MemoryStream MStream = new MemoryStream(); CryptoStream CStream = new CryptoStream(MStream, myDES.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); CStream.Write(inputByteArray, 0, inputByteArray.Length); CStream.FlushFinalBlock(); return Convert.ToBase64String(MStream.ToArray()); } catch { return str; } } #endregion #region DES解密字符串 ///<summary> ///DES解密字符串 ///</summary> ///<param name="str">待解密的字符串</param> ///<param name="key">解密密钥,要求为8位,和加密密钥相同</param> ///<returns>解密成功返回解密后的字符串,失败返源字符串</returns> public string DecryptDES(string str, string key) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(key); byte[] rgbIV = Keys; byte[] inputByteArray = Convert.FromBase64String(str); DESCryptoServiceProvider myDES = new DESCryptoServiceProvider(); MemoryStream MStream = new MemoryStream(); CryptoStream CStream = new CryptoStream(MStream, myDES.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); CStream.Write(inputByteArray, 0, inputByteArray.Length); CStream.FlushFinalBlock(); return Encoding.UTF8.GetString(MStream.ToArray()); } catch { return str; } } #endregion }
partial class Form1 { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { this.splitContainer1 = new System.Windows.Forms.SplitContainer(); this.rtbContent = new System.Windows.Forms.RichTextBox(); this.splitContainer2 = new System.Windows.Forms.SplitContainer(); this.rtbSend = new System.Windows.Forms.RichTextBox(); this.button1 = new System.Windows.Forms.Button(); this.button2 = new System.Windows.Forms.Button(); this.button3 = new System.Windows.Forms.Button(); this.groupBox1 = new System.Windows.Forms.GroupBox(); this.textBox3 = new System.Windows.Forms.TextBox(); this.label5 = new System.Windows.Forms.Label(); this.textBox2 = new System.Windows.Forms.TextBox(); this.label4 = new System.Windows.Forms.Label(); this.textBox1 = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.label8 = new System.Windows.Forms.Label(); this.textBox4 = new System.Windows.Forms.TextBox(); this.groupBox2 = new System.Windows.Forms.GroupBox(); this.button4 = new System.Windows.Forms.Button(); this.splitContainer1.Panel1.SuspendLayout(); this.splitContainer1.Panel2.SuspendLayout(); this.splitContainer1.SuspendLayout(); this.splitContainer2.Panel1.SuspendLayout(); this.splitContainer2.Panel2.SuspendLayout(); this.splitContainer2.SuspendLayout(); this.groupBox1.SuspendLayout(); this.groupBox2.SuspendLayout(); this.SuspendLayout(); // // splitContainer1 // this.splitContainer1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.splitContainer1.Location = new System.Drawing.Point(4, 4); this.splitContainer1.Name = "splitContainer1"; this.splitContainer1.Orientation = System.Windows.Forms.Orientation.Horizontal; // // splitContainer1.Panel1 // this.splitContainer1.Panel1.Controls.Add(this.rtbContent); // // splitContainer1.Panel2 // this.splitContainer1.Panel2.Controls.Add(this.splitContainer2); this.splitContainer1.Size = new System.Drawing.Size(430, 364); this.splitContainer1.SplitterDistance = 240; this.splitContainer1.SplitterWidth = 3; this.splitContainer1.TabIndex = 1; // // rtbContent // this.rtbContent.BackColor = System.Drawing.Color.White; this.rtbContent.BorderStyle = System.Windows.Forms.BorderStyle.None; this.rtbContent.Dock = System.Windows.Forms.DockStyle.Fill; this.rtbContent.Location = new System.Drawing.Point(0, 0); this.rtbContent.Name = "rtbContent"; this.rtbContent.ReadOnly = true; this.rtbContent.Size = new System.Drawing.Size(428, 238); this.rtbContent.TabIndex = 9; this.rtbContent.Text = ""; this.rtbContent.TextChanged += new System.EventHandler(this.rtbContent_TextChanged); // // splitContainer2 // this.splitContainer2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.splitContainer2.Dock = System.Windows.Forms.DockStyle.Fill; this.splitContainer2.Location = new System.Drawing.Point(0, 0); this.splitContainer2.Name = "splitContainer2"; this.splitContainer2.Orientation = System.Windows.Forms.Orientation.Horizontal; // // splitContainer2.Panel1 // this.splitContainer2.Panel1.Controls.Add(this.rtbSend); // // splitContainer2.Panel2 // this.splitContainer2.Panel2.Controls.Add(this.button1); this.splitContainer2.Panel2.Controls.Add(this.button2); this.splitContainer2.Panel2.Controls.Add(this.button3); this.splitContainer2.Size = new System.Drawing.Size(430, 121); this.splitContainer2.SplitterDistance = 87; this.splitContainer2.SplitterWidth = 1; this.splitContainer2.TabIndex = 0; // // rtbSend // this.rtbSend.BorderStyle = System.Windows.Forms.BorderStyle.None; this.rtbSend.Dock = System.Windows.Forms.DockStyle.Fill; this.rtbSend.Location = new System.Drawing.Point(0, 0); this.rtbSend.Name = "rtbSend"; this.rtbSend.Size = new System.Drawing.Size(428, 85); this.rtbSend.TabIndex = 2; this.rtbSend.Text = ""; this.rtbSend.KeyDown += new System.Windows.Forms.KeyEventHandler(this.rtbSend_KeyDown); // // button1 // this.button1.Location = new System.Drawing.Point(294, 4); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(39, 23); this.button1.TabIndex = 4; this.button1.Text = "清屏"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // button2 // this.button2.Location = new System.Drawing.Point(339, 4); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(38, 23); this.button2.TabIndex = 3; this.button2.Text = "发送"; this.button2.UseVisualStyleBackColor = true; this.button2.Click += new System.EventHandler(this.button2_Click); // // button3 // this.button3.Location = new System.Drawing.Point(383, 4); this.button3.Name = "button3"; this.button3.Size = new System.Drawing.Size(39, 23); this.button3.TabIndex = 5; this.button3.Text = "关闭"; this.button3.UseVisualStyleBackColor = true; this.button3.Click += new System.EventHandler(this.button3_Click); // // groupBox1 // this.groupBox1.Controls.Add(this.textBox3); this.groupBox1.Controls.Add(this.label5); this.groupBox1.Controls.Add(this.textBox2); this.groupBox1.Controls.Add(this.label4); this.groupBox1.Controls.Add(this.textBox1); this.groupBox1.Controls.Add(this.label3); this.groupBox1.Location = new System.Drawing.Point(440, 87); this.groupBox1.Name = "groupBox1"; this.groupBox1.Size = new System.Drawing.Size(109, 165); this.groupBox1.TabIndex = 8; this.groupBox1.TabStop = false; this.groupBox1.Text = "数据传输信息"; // // textBox3 // this.textBox3.Location = new System.Drawing.Point(20, 132); this.textBox3.Name = "textBox3"; this.textBox3.ReadOnly = true; this.textBox3.Size = new System.Drawing.Size(77, 21); this.textBox3.TabIndex = 7; // // label5 // this.label5.AutoSize = true; this.label5.Location = new System.Drawing.Point(8, 115); this.label5.Name = "label5"; this.label5.Size = new System.Drawing.Size(77, 12); this.label5.TabIndex = 6; this.label5.Text = "丢失数据报:"; // // textBox2 // this.textBox2.Location = new System.Drawing.Point(20, 86); this.textBox2.Name = "textBox2"; this.textBox2.ReadOnly = true; this.textBox2.Size = new System.Drawing.Size(77, 21); this.textBox2.TabIndex = 7; // // label4 // this.label4.AutoSize = true; this.label4.Location = new System.Drawing.Point(8, 69); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size(89, 12); this.label4.TabIndex = 4; this.label4.Text = "已接收数据报:"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(20, 40); this.textBox1.Name = "textBox1"; this.textBox1.ReadOnly = true; this.textBox1.Size = new System.Drawing.Size(77, 21); this.textBox1.TabIndex = 6; // // label3 // this.label3.AutoSize = true; this.label3.Location = new System.Drawing.Point(8, 23); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(89, 12); this.label3.TabIndex = 2; this.label3.Text = "已发送数据报:"; // // label8 // this.label8.AutoSize = true; this.label8.Location = new System.Drawing.Point(8, 23); this.label8.Name = "label8"; this.label8.Size = new System.Drawing.Size(53, 12); this.label8.TabIndex = 2; this.label8.Text = "端口号:"; // // textBox4 // this.textBox4.Location = new System.Drawing.Point(20, 40); this.textBox4.Name = "textBox4"; this.textBox4.Size = new System.Drawing.Size(77, 21); this.textBox4.TabIndex = 0; this.textBox4.Text = "8888"; // // groupBox2 // this.groupBox2.Controls.Add(this.button4); this.groupBox2.Controls.Add(this.textBox4); this.groupBox2.Controls.Add(this.label8); this.groupBox2.Location = new System.Drawing.Point(440, 258); this.groupBox2.Name = "groupBox2"; this.groupBox2.Size = new System.Drawing.Size(109, 110); this.groupBox2.TabIndex = 2; this.groupBox2.TabStop = false; this.groupBox2.Text = "端口设置"; // // button4 // this.button4.Location = new System.Drawing.Point(22, 68); this.button4.Name = "button4"; this.button4.Size = new System.Drawing.Size(75, 32); this.button4.TabIndex = 1; this.button4.Text = "设置"; this.button4.UseVisualStyleBackColor = true; this.button4.Click += new System.EventHandler(this.button4_Click); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(555, 372); this.Controls.Add(this.groupBox2); this.Controls.Add(this.groupBox1); this.Controls.Add(this.splitContainer1); this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "对数据报进行加密保障通信完全"; this.Load += new System.EventHandler(this.Form1_Load); this.splitContainer1.Panel1.ResumeLayout(false); this.splitContainer1.Panel2.ResumeLayout(false); this.splitContainer1.ResumeLayout(false); this.splitContainer2.Panel1.ResumeLayout(false); this.splitContainer2.Panel2.ResumeLayout(false); this.splitContainer2.ResumeLayout(false); this.groupBox1.ResumeLayout(false); this.groupBox1.PerformLayout(); this.groupBox2.ResumeLayout(false); this.groupBox2.PerformLayout(); this.ResumeLayout(false); } #endregion private System.Windows.Forms.SplitContainer splitContainer1; private System.Windows.Forms.RichTextBox rtbContent; private System.Windows.Forms.SplitContainer splitContainer2; private System.Windows.Forms.RichTextBox rtbSend; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.TextBox textBox3; private System.Windows.Forms.Label label5; private System.Windows.Forms.TextBox textBox2; private System.Windows.Forms.Label label4; private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.Label label3; private System.Windows.Forms.Label label8; private System.Windows.Forms.TextBox textBox4; private System.Windows.Forms.GroupBox groupBox2; private System.Windows.Forms.Button button4; }
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