C#—非对称加密：加密文件

★★★★★★ ☆☆☆ ★★★★★★

●●○○ 聂永 ○○●●

§§§§nie_yong@163.com§§§§

◆◆□□nie.yong@126.com□□◆◆

№№№№№№ ※※※ №№№№№№

说明：

1.你要注意的是读取文件的两种不同方式；

2.从已经保存的钥匙文件中读取其内容；

3.这个程序做的很粗糙（要准备考外语六级，要准备期末考试，实在很忙啊！），希望诸位能够完善，然后也发表出来，在下表示感谢；

4.参考书目：《C#数据安全手册》;

5.有做这方面程序的朋友，愿意相交。

代码部分：

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.IO;

using System.Text;

using System.Security.Cryptography;

using System.Threading;

namespace 非对称加密

{

/// <summary>

/// Form1 的摘要说明。

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.TabControl tabControl1;

private System.Windows.Forms.TabPage tabPage1;

private System.Windows.Forms.TabPage tabPage2;

private System.Windows.Forms.TabPage tabPage3;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.Button button3;

private System.Windows.Forms.SaveFileDialog save;

private System.Windows.Forms.Label label1;

private System.Windows.Forms.TextBox textBox1;

private System.Windows.Forms.Button button4;

private System.Windows.Forms.Button button5;

private System.Windows.Forms.Label label2;

private System.Windows.Forms.RichTextBox richtext2;

private System.Windows.Forms.OpenFileDialog open;

private System.Windows.Forms.Label label3;

private System.Windows.Forms.RichTextBox richtext3;

private System.Windows.Forms.RichTextBox richtext;

private System.Windows.Forms.Button button6;

private System.Windows.Forms.Button button7;

private System.Windows.Forms.Button button8;

private System.Windows.Forms.TextBox textBox2;

private System.Windows.Forms.Label label4;

private System.Windows.Forms.Button button9;

private System.Windows.Forms.TextBox textBox3;

private System.Windows.Forms.Label label5;

private System.Windows.Forms.Button button10;

private System.Windows.Forms.Label label6;

private System.Windows.Forms.Button button11;

private System.Windows.Forms.Button button12;

private System.Windows.Forms.RichTextBox richtext4;

private System.Windows.Forms.Button button13;

private System.Windows.Forms.Button button14;

private System.Windows.Forms.Button button15;

private System.Windows.Forms.TabPage tabPage4;

private System.Windows.Forms.TextBox textBox4;

private System.Windows.Forms.Button button16;

private System.Windows.Forms.TextBox textBox5;

private System.Windows.Forms.Button button17;

private System.Windows.Forms.Button button18;

private System.Windows.Forms.Button button19;

private System.Windows.Forms.Button button20;

private System.Windows.Forms.Button button21;

private System.Windows.Forms.RichTextBox richtext5;

/// <summary>

/// 必需的设计器变量。

private static RSACryptoServiceProvider crypt;

private static string privatekey;

private static string publickey;

private static byte [] bytes;

private static string publicinfo;

private static string privateinfo;

private static string readpublickey;

private static string readprivatekey;

//文件打开和是否读取钥匙的标记

private bool openla = false;

private bool savela = false;

private bool readpubkey=false;

private bool readprikey=false;

private Thread th;

/// </summary>

private System.ComponentModel.Container components = null;

public Form1()

{

// Windows 窗体设计器支持所必需的

InitializeComponent();

// TODO: 在 InitializeComponent 调用后添加任何构造函数代码

}

/// <summary>

/// 清理所有正在使用的资源。

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (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.tabControl1 = new System.Windows.Forms.TabControl();

this.tabPage1 = new System.Windows.Forms.TabPage();

this.button6 = new System.Windows.Forms.Button();

this.button3 = new System.Windows.Forms.Button();

this.button2 = new System.Windows.Forms.Button();

this.richtext = new System.Windows.Forms.RichTextBox();

this.button1 = new System.Windows.Forms.Button();

this.tabPage2 = new System.Windows.Forms.TabPage();

this.button8 = new System.Windows.Forms.Button();

this.button7 = new System.Windows.Forms.Button();

this.label3 = new System.Windows.Forms.Label();

this.richtext3 = new System.Windows.Forms.RichTextBox();

this.label2 = new System.Windows.Forms.Label();

this.richtext2 = new System.Windows.Forms.RichTextBox();

this.button5 = new System.Windows.Forms.Button();

this.button4 = new System.Windows.Forms.Button();

this.textBox1 = new System.Windows.Forms.TextBox();

this.label1 = new System.Windows.Forms.Label();

this.tabPage3 = new System.Windows.Forms.TabPage();

this.button15 = new System.Windows.Forms.Button();

this.button14 = new System.Windows.Forms.Button();

this.button13 = new System.Windows.Forms.Button();

this.button12 = new System.Windows.Forms.Button();

this.button11 = new System.Windows.Forms.Button();

this.richtext4 = new System.Windows.Forms.RichTextBox();

this.label6 = new System.Windows.Forms.Label();

this.button10 = new System.Windows.Forms.Button();

this.label5 = new System.Windows.Forms.Label();

this.textBox3 = new System.Windows.Forms.TextBox();

this.button9 = new System.Windows.Forms.Button();

this.label4 = new System.Windows.Forms.Label();

this.textBox2 = new System.Windows.Forms.TextBox();

this.tabPage4 = new System.Windows.Forms.TabPage();

this.save = new System.Windows.Forms.SaveFileDialog();

this.open = new System.Windows.Forms.OpenFileDialog();

this.textBox4 = new System.Windows.Forms.TextBox();

this.button16 = new System.Windows.Forms.Button();

this.textBox5 = new System.Windows.Forms.TextBox();

this.button17 = new System.Windows.Forms.Button();

this.button18 = new System.Windows.Forms.Button();

this.button19 = new System.Windows.Forms.Button();

this.button20 = new System.Windows.Forms.Button();

this.button21 = new System.Windows.Forms.Button();

this.richtext5 = new System.Windows.Forms.RichTextBox();

this.tabControl1.SuspendLayout();

this.tabPage1.SuspendLayout();

this.tabPage2.SuspendLayout();

this.tabPage3.SuspendLayout();

this.tabPage4.SuspendLayout();

this.SuspendLayout();

// tabControl1

this.tabControl1.Controls.Add(this.tabPage1);

this.tabControl1.Controls.Add(this.tabPage2);

this.tabControl1.Controls.Add(this.tabPage3);

this.tabControl1.Controls.Add(this.tabPage4);

this.tabControl1.Location = new System.Drawing.Point(8, 64);

this.tabControl1.Name = "tabControl1";

this.tabControl1.SelectedIndex = 0;

this.tabControl1.Size = new System.Drawing.Size(568, 368);

this.tabControl1.TabIndex = 0;

// tabPage1

this.tabPage1.Controls.Add(this.button6);

this.tabPage1.Controls.Add(this.button3);

this.tabPage1.Controls.Add(this.button2);

this.tabPage1.Controls.Add(this.richtext);

this.tabPage1.Controls.Add(this.button1);

this.tabPage1.Location = new System.Drawing.Point(4, 21);

this.tabPage1.Name = "tabPage1";

this.tabPage1.Size = new System.Drawing.Size(560, 343);

this.tabPage1.TabIndex = 0;

this.tabPage1.Text = "得到钥匙";

// button6

this.button6.Location = new System.Drawing.Point(216, 288);

this.button6.Name = "button6";

this.button6.TabIndex = 4;

this.button6.Text = "写入文件";

this.button6.Click += new System.EventHandler(this.button6_Click);

// button3

this.button3.Location = new System.Drawing.Point(456, 16);

this.button3.Name = "button3";

this.button3.TabIndex = 3;

this.button3.Text = "保存私匙";

this.button3.Click += new System.EventHandler(this.button3_Click);

// button2

this.button2.Location = new System.Drawing.Point(320, 16);

this.button2.Name = "button2";

this.button2.TabIndex = 2;

this.button2.Text = "保存公钥";

this.button2.Click += new System.EventHandler(this.button2_Click);

// richtext

this.richtext.Location = new System.Drawing.Point(16, 56);

this.richtext.Name = "richtext";

this.richtext.Size = new System.Drawing.Size(520, 184);

this.richtext.TabIndex = 1;

this.richtext.Text = "richTextBox1";

// button1

this.button1.Location = new System.Drawing.Point(136, 16);

this.button1.Name = "button1";

this.button1.Size = new System.Drawing.Size(88, 23);

this.button1.TabIndex = 0;

this.button1.Text = "得到钥匙信息";

this.button1.Click += new System.EventHandler(this.button1_Click);

// tabPage2

this.tabPage2.Controls.Add(this.button8);

this.tabPage2.Controls.Add(this.button7);

this.tabPage2.Controls.Add(this.label3);

this.tabPage2.Controls.Add(this.richtext3);

this.tabPage2.Controls.Add(this.label2);

this.tabPage2.Controls.Add(this.richtext2);

this.tabPage2.Controls.Add(this.button5);

this.tabPage2.Controls.Add(this.button4);

this.tabPage2.Controls.Add(this.textBox1);

this.tabPage2.Controls.Add(this.label1);

this.tabPage2.Location = new System.Drawing.Point(4, 21);

this.tabPage2.Name = "tabPage2";

this.tabPage2.Size = new System.Drawing.Size(560, 343);

this.tabPage2.TabIndex = 1;

this.tabPage2.Text = "加密解密文字";

// button8

this.button8.Location = new System.Drawing.Point(368, 72);

this.button8.Name = "button8";

this.button8.TabIndex = 9;

this.button8.Text = "读取私匙";

this.button8.Click += new System.EventHandler(this.button8_Click);

// button7

this.button7.Location = new System.Drawing.Point(120, 72);

this.button7.Name = "button7";

this.button7.TabIndex = 8;

this.button7.Text = "读取公匙";

this.button7.Click += new System.EventHandler(this.button7_Click);

// label3

this.label3.Location = new System.Drawing.Point(304, 128);

this.label3.Name = "label3";

this.label3.Size = new System.Drawing.Size(100, 16);

this.label3.TabIndex = 7;

this.label3.Text = "解密结果";

// richtext3

this.richtext3.Location = new System.Drawing.Point(280, 152);

this.richtext3.Name = "richtext3";

this.richtext3.Size = new System.Drawing.Size(272, 160);

this.richtext3.TabIndex = 6;

this.richtext3.Text = "richTextBox2";

// label2

this.label2.Location = new System.Drawing.Point(48, 128);

this.label2.Name = "label2";

this.label2.Size = new System.Drawing.Size(128, 16);

this.label2.TabIndex = 5;

this.label2.Text = "加密窗口：";

// richtext2

this.richtext2.Location = new System.Drawing.Point(8, 152);

this.richtext2.Name = "richtext2";

this.richtext2.Size = new System.Drawing.Size(256, 160);

this.richtext2.TabIndex = 4;

this.richtext2.Text = "richTextBox2";

// button5

this.button5.Location = new System.Drawing.Point(352, 96);

this.button5.Name = "button5";

this.button5.Size = new System.Drawing.Size(112, 23);

this.button5.TabIndex = 3;

this.button5.Text = "使用私匙解密";

this.button5.Click += new System.EventHandler(this.button5_Click);

// button4

this.button4.Location = new System.Drawing.Point(112, 96);

this.button4.Name = "button4";

this.button4.Size = new System.Drawing.Size(96, 23);

this.button4.TabIndex = 2;

this.button4.Text = "使用公匙加密";

this.button4.Click += new System.EventHandler(this.button4_Click);

// textBox1

this.textBox1.Location = new System.Drawing.Point(104, 32);

this.textBox1.Multiline = true;

this.textBox1.Name = "textBox1";

this.textBox1.Size = new System.Drawing.Size(264, 32);

this.textBox1.TabIndex = 1;

this.textBox1.Text = "textBox1";

// label1

this.label1.Location = new System.Drawing.Point(128, 8);

this.label1.Name = "label1";

this.label1.Size = new System.Drawing.Size(120, 16);

this.label1.TabIndex = 0;

this.label1.Text = "请输入加密的文字";

// tabPage3

this.tabPage3.Controls.Add(this.button15);

this.tabPage3.Controls.Add(this.button14);

this.tabPage3.Controls.Add(this.button13);

this.tabPage3.Controls.Add(this.button12);

this.tabPage3.Controls.Add(this.button11);

this.tabPage3.Controls.Add(this.richtext4);

this.tabPage3.Controls.Add(this.label6);

this.tabPage3.Controls.Add(this.button10);

this.tabPage3.Controls.Add(this.label5);

this.tabPage3.Controls.Add(this.textBox3);

this.tabPage3.Controls.Add(this.button9);

this.tabPage3.Controls.Add(this.label4);

this.tabPage3.Controls.Add(this.textBox2);

this.tabPage3.Location = new System.Drawing.Point(4, 21);

this.tabPage3.Name = "tabPage3";

this.tabPage3.Size = new System.Drawing.Size(560, 343);

this.tabPage3.TabIndex = 2;

this.tabPage3.Text = "加密解密文件";

// button15

this.button15.Location = new System.Drawing.Point(208, 128);

this.button15.Name = "button15";

this.button15.TabIndex = 12;

this.button15.Text = "清空文本";

this.button15.Click += new System.EventHandler(this.button15_Click);

// button14

this.button14.Location = new System.Drawing.Point(432, 88);

this.button14.Name = "button14";

this.button14.TabIndex = 11;

this.button14.Text = "读取私匙";

this.button14.Click += new System.EventHandler(this.button14_Click);

// button13

this.button13.Location = new System.Drawing.Point(432, 32);

this.button13.Name = "button13";

this.button13.TabIndex = 10;

this.button13.Text = "读取公匙";

this.button13.Click += new System.EventHandler(this.button13_Click);

// button12

this.button12.Location = new System.Drawing.Point(320, 88);

this.button12.Name = "button12";

this.button12.TabIndex = 9;

this.button12.Text = "开始解密";

this.button12.Click += new System.EventHandler(this.button12_Click);

// button11

this.button11.Location = new System.Drawing.Point(320, 32);

this.button11.Name = "button11";

this.button11.TabIndex = 8;

this.button11.Text = "开始加密";

this.button11.Click += new System.EventHandler(this.button11_Click);

// richtext4

this.richtext4.Location = new System.Drawing.Point(8, 152);

this.richtext4.Name = "richtext4";

this.richtext4.Size = new System.Drawing.Size(496, 168);

this.richtext4.TabIndex = 7;

this.richtext4.Text = "";

// label6

this.label6.Location = new System.Drawing.Point(16, 120);

this.label6.Name = "label6";

this.label6.Size = new System.Drawing.Size(168, 23);

this.label6.TabIndex = 6;

this.label6.Text = "加密与解密窗口：";

// button10

this.button10.Location = new System.Drawing.Point(224, 88);

this.button10.Name = "button10";

this.button10.TabIndex = 5;

this.button10.Text = "Save ...";

this.button10.Click += new System.EventHandler(this.button10_Click);

// label5

this.label5.Location = new System.Drawing.Point(16, 64);

this.label5.Name = "label5";

this.label5.Size = new System.Drawing.Size(216, 16);

this.label5.TabIndex = 4;

this.label5.Text = "请保存加密好或者解密后的文件";

// textBox3

this.textBox3.Location = new System.Drawing.Point(16, 88);

this.textBox3.Name = "textBox3";

this.textBox3.Size = new System.Drawing.Size(184, 21);

this.textBox3.TabIndex = 3;

this.textBox3.Text = "textBox3";

// button9

this.button9.Location = new System.Drawing.Point(224, 32);

this.button9.Name = "button9";

this.button9.TabIndex = 2;

this.button9.Text = "Open ...";

this.button9.Click += new System.EventHandler(this.button9_Click);

// label4

this.label4.Location = new System.Drawing.Point(16, 8);

this.label4.Name = "label4";

this.label4.Size = new System.Drawing.Size(216, 16);

this.label4.TabIndex = 1;

this.label4.Text = "请选择要加密或者解密的文本文件";

// textBox2

this.textBox2.Location = new System.Drawing.Point(16, 32);

this.textBox2.Name = "textBox2";

this.textBox2.Size = new System.Drawing.Size(184, 21);

this.textBox2.TabIndex = 0;

this.textBox2.Text = "textBox2";

// tabPage4

this.tabPage4.Controls.Add(this.richtext5);

this.tabPage4.Controls.Add(this.button21);

this.tabPage4.Controls.Add(this.button20);

this.tabPage4.Controls.Add(this.button19);

this.tabPage4.Controls.Add(this.button18);

this.tabPage4.Controls.Add(this.button17);

this.tabPage4.Controls.Add(this.textBox5);

this.tabPage4.Controls.Add(this.button16);

this.tabPage4.Controls.Add(this.textBox4);

this.tabPage4.Location = new System.Drawing.Point(4, 21);

this.tabPage4.Name = "tabPage4";

this.tabPage4.Size = new System.Drawing.Size(560, 343);

this.tabPage4.TabIndex = 3;

this.tabPage4.Text = "加密解密其它文件";

// textBox4

this.textBox4.Location = new System.Drawing.Point(24, 24);

this.textBox4.Name = "textBox4";

this.textBox4.Size = new System.Drawing.Size(240, 21);

this.textBox4.TabIndex = 0;

this.textBox4.Text = "textBox4";

// button16

this.button16.Location = new System.Drawing.Point(304, 24);

this.button16.Name = "button16";

this.button16.TabIndex = 1;

this.button16.Text = "打开";

this.button16.Click += new System.EventHandler(this.button16_Click);

// textBox5

this.textBox5.Location = new System.Drawing.Point(24, 56);

this.textBox5.Name = "textBox5";

this.textBox5.Size = new System.Drawing.Size(240, 21);

this.textBox5.TabIndex = 2;

this.textBox5.Text = "textBox5";

// button17

this.button17.Location = new System.Drawing.Point(304, 56);

this.button17.Name = "button17";

this.button17.TabIndex = 3;

this.button17.Text = "保存";

this.button17.Click += new System.EventHandler(this.button17_Click);

// button18

this.button18.Location = new System.Drawing.Point(48, 88);

this.button18.Name = "button18";

this.button18.TabIndex = 4;

this.button18.Text = "读取公匙";

this.button18.Click += new System.EventHandler(this.button18_Click);

// button19

this.button19.Location = new System.Drawing.Point(160, 88);

this.button19.Name = "button19";

this.button19.TabIndex = 5;

this.button19.Text = "读取私匙";

this.button19.Click += new System.EventHandler(this.button19_Click);

// button20

this.button20.Location = new System.Drawing.Point(112, 144);

this.button20.Name = "button20";

this.button20.TabIndex = 6;

this.button20.Text = "加密文件";

this.button20.Click += new System.EventHandler(this.button20_Click);

// button21

this.button21.Location = new System.Drawing.Point(232, 144);

this.button21.Name = "button21";

this.button21.TabIndex = 7;

this.button21.Text = "解密文件";

this.button21.Click += new System.EventHandler(this.button21_Click);

// richtext5

this.richtext5.Location = new System.Drawing.Point(88, 200);

this.richtext5.Name = "richtext5";

this.richtext5.Size = new System.Drawing.Size(304, 112);

this.richtext5.TabIndex = 8;

this.richtext5.Text = "";

// Form1

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(584, 453);

this.Controls.Add(this.tabControl1);

this.Name = "Form1";

this.Text = "Form1";

this.tabControl1.ResumeLayout(false);

this.tabPage1.ResumeLayout(false);

this.tabPage2.ResumeLayout(false);

this.tabPage3.ResumeLayout(false);

this.tabPage4.ResumeLayout(false);

this.ResumeLayout(false);

}

#endregion

/// <summary>

/// 应用程序的主入口点。

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

//得到钥匙信息

private void button1_Click(object sender, System.EventArgs e)

{

crypt=new RSACryptoServiceProvider();

publickey=crypt.ToXmlString(false);

richtext.Text="导出秘匙的情况下：\n"+publickey+"\n";

privatekey=crypt.ToXmlString(true);

string info="仅仅导出公匙的情况下：\n"+privatekey+"\n";

richtext.AppendText(info);

crypt.Clear();

}

//保存公匙信息

private void button2_Click(object sender, System.EventArgs e)

{

save=new SaveFileDialog();

save.Filter="File Text (*.txt)|*.txt|All File (*.*)|*.*";

save.ShowDialog();

publicinfo=save.FileName;

}

//保存密匙信息

private void button3_Click(object sender, System.EventArgs e)

{

save=new SaveFileDialog();

save.Filter="File Text (*.txt)|*.txt|All File (*.*)|*.*";

save.ShowDialog();

privateinfo=save.FileName;

}

//用公匙加密

private void button4_Click(object sender, System.EventArgs e)

{

if(textBox1.Text =="")

{

MessageBox.Show("加密文字信息不能为空！");

return;

}

if(readpubkey==false)

{

MessageBox.Show("请打开公钥所在的文件！");

return;

}

try

{

crypt=new RSACryptoServiceProvider();

UTF8Encoding enc=new UTF8Encoding();

bytes=enc.GetBytes(textBox1.Text);

crypt.FromXmlString( readpublickey );

bytes = crypt.Encrypt( bytes,false );

string encryttext=enc.GetString(bytes);

richtext2.Text="加密结果：\n"+encryttext+"\n"+"加密结束！";

}

catch

{

MessageBox.Show("请检查是否打开公匙或者公匙是否损坏！");

}

//使用私匙解密

private void button5_Click(object sender, System.EventArgs e)

{

if(readprikey==false)

{

MessageBox.Show("请打开密匙所在的文件！");

return;

}

try

{

UTF8Encoding enc=new UTF8Encoding();

byte [] decryptbyte;

crypt.FromXmlString ( readprivatekey ) ;

decryptbyte = crypt.Decrypt( bytes,false );

string decrypttext=enc.GetString( decryptbyte );

richtext3.Text = "解密结果：\n" + decrypttext + "\n" + "解密结束！" ;

}

catch

{

MessageBox.Show("请检查是否打开私匙或者私匙是否损坏！");

}

//把钥匙信息写入文件

private void button6_Click(object sender, System.EventArgs e)

{

StreamWriter one=new StreamWriter(publicinfo,true,UTF8Encoding.UTF8);

one.Write(publickey);

StreamWriter two=new StreamWriter(privateinfo,true,UTF8Encoding.UTF8);

two.Write(privatekey);

one.Flush();

two.Flush();

one.Close();

two.Close();

MessageBox.Show("成功保存公匙和密匙！");

}

//从文件中读取公匙信息

private void button7_Click(object sender, System.EventArgs e)

{

readpublickey = ReadPublicKey();

readpubkey=true;

}

//从文件中读取私匙信息

private void button8_Click(object sender, System.EventArgs e)

{

readprivatekey = ReadPrivateKey();

readprikey = true;

}

//打开加密或者解密的文件

private void button9_Click(object sender, System.EventArgs e)

{

open = new OpenFileDialog( );

open.Filter="Text File (*.txt)|*.txt|All Files (*.*)|*.*";

open.ShowDialog();

textBox2.Text=open.FileName;

openla = true;

}

//保存加密或者解密的文件

private void button10_Click(object sender, System.EventArgs e)

{

try

{

save=new SaveFileDialog();

save.Filter="File Text (*.txt)|*.txt|All File (*.*)|*.*";

save.ShowDialog();

textBox3.Text=save.FileName;

savela = true;

}

catch

{

MessageBox.Show("请输入文件名字！");

return;

}

//加密文本文件

private void button11_Click(object sender, System.EventArgs e)

{

if(readpubkey != true)

{

MessageBox.Show("请打开公钥所在的文件！");

return;

}

if(openla==true&&savela==true)

{

crypt=new RSACryptoServiceProvider();

crypt.FromXmlString( readpublickey );

UTF8Encoding enc=new UTF8Encoding();

//读取原文件到一个string 去啊

StreamReader sr=new StreamReader(textBox2.Text,Encoding.Default);

string textinfo=sr.ReadToEnd();

sr.Close();

// richtext4.AppendText( "\n原文件内容：\n" + textinfo + "\n" );

//开始加密

string readinfo=EncryptFile(textinfo,textBox3.Text);

richtext4.AppendText( "加密文件已经保存到：" + textBox3.Text + "\n" );

richtext4.AppendText( "加密结果：\n" + readinfo + "\n加密结束！" );

}

else

MessageBox.Show("请选择你要加密的文件或者要保存的文件！");

}

//解密文件

private void button12_Click(object sender, System.EventArgs e)

{

if(readprikey==false)

{

MessageBox.Show("请打开密匙所在的文件！");

return;

}

if(openla==true&&savela==true)

{

try

{

crypt=new RSACryptoServiceProvider();

crypt.FromXmlString( readprivatekey );

string decryptinfo = DecryptFile(textBox2.Text,textBox3.Text);

richtext4.AppendText( "解密文件已经保存到：" + textBox3.Text+ "\n" );

richtext4.AppendText("解密结果：\n" + decryptinfo + "\n" + "解密结束！\n");

}

catch

{

MessageBox.Show("请检查密匙文件是否和公匙相对应或者密匙文件损坏！");

return;

}

else

MessageBox.Show("请选择你要解密的文件或者要保存的文件！");

}

//加密文件时候，同样要打开公钥匙

private void button13_Click(object sender, System.EventArgs e)

{

readpublickey = ReadPublicKey();

readpubkey=true;

}

//解密文件时候，同样要打开私钥匙

private void button14_Click(object sender, System.EventArgs e)

{

readprivatekey =ReadPrivateKey();

readprikey=true;

}

private void button15_Click(object sender, System.EventArgs e)

{

richtext4.Clear();

}

//打开文件

private void button16_Click(object sender, System.EventArgs e)

{

open = new OpenFileDialog( );

open.Filter="All Files (*.*)|*.*";

open.ShowDialog();

textBox4.Text=open.FileName;

openla = true;

}

//保存文件

private void button17_Click(object sender, System.EventArgs e)

{

save=new SaveFileDialog();

save.Filter="All File (*.*)|*.*";

save.ShowDialog();

textBox5.Text=save.FileName;

savela = true;

}

//加密其它非文本文件

private void EncryptOther(string file1,string file2)

{

FileStream picfs=new FileStream(@file1,FileMode.Open);

FileStream fs=new FileStream(@file2,FileMode.OpenOrCreate);

byte [] bytes=new byte[picfs.Length];

picfs.Read(bytes,0,(int)picfs.Length);

picfs.Close();

int blockSize=0;

if(crypt.KeySize==1024)

blockSize=16;

else blockSize=8;

byte[]rawblock,encryblock;

for(int i=0;i<bytes.Length;i+=blockSize)

{

if((bytes.Length-i)>blockSize)

rawblock=new byte[blockSize];

else rawblock =new byte[bytes.Length-i];

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

encryblock=crypt.Encrypt(rawblock,false);

fs.Write(encryblock,0,encryblock.Length);

}

fs.Flush();

fs.Close();

}

//解密其它非文本文件

private void DecryptOther(string fileone,string filetwo)

{

FileStream fs=new FileStream(@fileone,FileMode.Open);

FileStream writopic=new FileStream(@filetwo,FileMode.Create);

byte [] bytes=new byte[fs.Length];

fs.Read(bytes,0,(int)fs.Length);

fs.Close();

MemoryStream ms=new MemoryStream();

int keySize=crypt.KeySize/8;

byte[]rawblock,decryptblock;

for(int i=0;i<bytes.Length;i+=keySize)

{

if( ( bytes.Length-i ) > keySize )

{

rawblock=new byte[keySize];

}

else

{rawblock =new byte[bytes.Length-i];}

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

decryptblock = crypt.Decrypt( rawblock,false );

ms.Write(decryptblock,0,decryptblock.Length);

}

ms.Position=0;

byte [] decode=new byte[ms.Length];

ms.Read(decode,0,(int)ms.Length);

ms.Close();

writopic.Write(decode,0,decode.Length);

writopic.Close();

}

//创建一个函数，可以在线程中使用

private void DecryptUsingThread()

{

DecryptOther(textBox4.Text,textBox5.Text);

}

//读取公钥匙

private void button18_Click(object sender, System.EventArgs e)

{

readpublickey = ReadPublicKey();

readpubkey=true;

}

//读取私钥匙

private void button19_Click(object sender, System.EventArgs e)

{

readprivatekey = ReadPrivateKey();

readprikey=true;

}

// 加密其它非文本文件啦

private void button20_Click(object sender, System.EventArgs e)

{

if(readpubkey==false)

{

MessageBox.Show("请打开公匙所在的文件！");

return;

}

if(openla==true&&savela==true)

{

try

{

crypt=new RSACryptoServiceProvider();

crypt.FromXmlString( readpublickey );

EncryptOther( textBox4.Text,textBox5.Text );

richtext5.AppendText("加密过程结束！：\n" + "加密文件已经保存到：\n" + textBox5.Text + "\n");

}

catch

{

MessageBox.Show("请检查密匙文件是否和公匙相对应或者密匙文件损坏！");

return;

}

else

MessageBox.Show("请选择你要解密的文件或者要保存的文件！");

}

//解密其它文件啦

private void button21_Click(object sender, System.EventArgs e)

{

if(readprikey==false)

{

MessageBox.Show("请打开密匙所在的文件！");

return;

}

if(openla==true&&savela==true)

{

try

{

crypt=new RSACryptoServiceProvider();

crypt.FromXmlString( readprivatekey );

//使用线程后，反而达不到效果 //原因？暂时不清晰

//可以转换，但是转换要经过几分钟，才可以真正得到想要的转换的东西。

th = new Thread( new ThreadStart( DecryptUsingThread ) );

th.Start();

// DecryptOther(textBox4.Text,textBox5.Text);

richtext5.AppendText( "解密结束！\n" + "解密文件已经保存到：" + textBox5.Text+ "\n" );

}

catch

{

MessageBox.Show("请检查密匙文件是否和公匙相对应或者密匙文件损坏！");

return;

}

else

MessageBox.Show("请选择你要解密的文件或者要保存的文件！");

}

//下面为自己定义的函数啦

//单独一个读取公匙的函数

private string ReadPublicKey()

{

string publickey;

open = new OpenFileDialog( );

open.Filter="Text File (*.txt)|*.txt|All File (*.*)|*.* ";

open.ShowDialog();

StreamReader sr = new StreamReader(open.FileName,UTF8Encoding.UTF8);

publickey = sr.ReadToEnd();

sr.Close();

return publickey;

}

//单独一个读取私匙的函数

private string ReadPrivateKey()

{

string privatekey;

open = new OpenFileDialog( );

open.Filter="Text File (*.txt)|*.txt|All File (*.*)|*.* ";

open.ShowDialog();

StreamReader sr = new StreamReader(open.FileName,UTF8Encoding.UTF8);

privatekey = sr.ReadToEnd();

sr.Close();

return privatekey;

}

//加密文本文件

private string EncryptFile( string textinfo, string filename )

{

UTF8Encoding enc=new UTF8Encoding();

byte [] bytes=enc.GetBytes( textinfo );

int blockSize=0;

if(crypt.KeySize==1024)

blockSize=16;

else

blockSize=8;

//同时写入到内存中去

MemoryStream ms=new MemoryStream();

//写入文件中去啊。

FileStream fs=new FileStream(@filename,FileMode.OpenOrCreate);

byte[]rawblock,encryblock;

for(int i=0;i<bytes.Length;i+=blockSize)

{

if((bytes.Length-i)>blockSize)

rawblock=new byte[blockSize];

else

rawblock =new byte[bytes.Length-i];

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

encryblock=crypt.Encrypt(rawblock,false);

fs.Write(encryblock,0,encryblock.Length);

//写入到内存中去啊。

ms.Write(encryblock,0,encryblock.Length);

}

//写入到内存中

ms.Position = 0;

byte [] decode = new byte[ms.Length];

ms.Read(decode,0,(int)ms.Length);

string decodeinfo = enc.GetString(decode,0,decode.Length);

fs.Flush();

fs.Close();

ms.Close();

return decodeinfo;

}

//解密文本文件

private string DecryptFile(string encryptfile,string decryptfile)

{

//打开加密后的文件，读取文件内容

FileStream fs=new FileStream(@encryptfile,FileMode.Open);

byte [] bytes=new byte[fs.Length];

fs.Read(bytes,0,(int)fs.Length);

fs.Close();

//先写入到内存

MemoryStream ms=new MemoryStream();

//最好写入到解密后的一个文件

StreamWriter sw=new StreamWriter(decryptfile);

int keySize=crypt.KeySize/8;

byte[]rawblock,decryptblock;

for(int i=0;i<bytes.Length;i+=keySize)

{

if( ( bytes.Length-i ) > keySize )

{

rawblock=new byte[keySize];

}

else

{rawblock =new byte[bytes.Length-i];}

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

decryptblock = crypt.Decrypt( rawblock,false );

ms.Write(decryptblock,0,decryptblock.Length);

}

ms.Position=0;

byte [] decode=new byte[ms.Length];

ms.Read(decode,0,(int)ms.Length);

UTF8Encoding enc=new UTF8Encoding();

string text=enc.GetString(decode);

//写入到内存中去啊

sw.Write(text);

sw.Flush();

ms.Close();

sw.Close();

return text;

}

//加密其它非文本文件，当然可以包括文本文件

private void EncryptOther(string file1,string file2)

{

FileStream picfs=new FileStream(@file1,FileMode.Open);

FileStream fs=new FileStream(@file2,FileMode.OpenOrCreate);

byte [] bytes=new byte[picfs.Length];

picfs.Read(bytes,0,(int)picfs.Length);

picfs.Close();

int blockSize=0;

if(crypt.KeySize==1024)

blockSize=16;

else blockSize=8;

byte[]rawblock,encryblock;

for(int i=0;i<bytes.Length;i+=blockSize)

{

if((bytes.Length-i)>blockSize)

rawblock=new byte[blockSize];

else rawblock =new byte[bytes.Length-i];

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

encryblock=crypt.Encrypt(rawblock,false);

fs.Write(encryblock,0,encryblock.Length);

}

fs.Flush();

fs.Close();

}

//解密其它非文本文件，当然可以包括文本文件

private void DecryptOther(string fileone,string filetwo)

{

FileStream fs=new FileStream(@fileone,FileMode.Open);

FileStream writopic=new FileStream(@filetwo,FileMode.Create);

byte [] bytes=new byte[fs.Length];

fs.Read(bytes,0,(int)fs.Length);

fs.Close();

MemoryStream ms=new MemoryStream();

int keySize=crypt.KeySize/8;

byte[]rawblock,decryptblock;

for(int i=0;i<bytes.Length;i+=keySize)

{

if( ( bytes.Length-i ) > keySize )

{

rawblock=new byte[keySize];

}

else

{rawblock =new byte[bytes.Length-i];}

Buffer.BlockCopy(bytes,i,rawblock,0,rawblock.Length);

decryptblock = crypt.Decrypt( rawblock,false );

ms.Write(decryptblock,0,decryptblock.Length);

}

ms.Position=0;

byte [] decode=new byte[ms.Length];

ms.Read(decode,0,(int)ms.Length);

ms.Close();

writopic.Write(decode,0,decode.Length);

writopic.Close();

}

//创建一个函数，可以在线程中使用，经实验，效果不明显

private void DecryptUsingThread()

{

DecryptOther(textBox4.Text,textBox5.Text);

}