c#如何加解密文件
c#如何加解密文件
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Security.Cryptography;
using System.IO;
namespace DesFile
{
/// <summary>
/// FrmEdsFile 的摘要说明。
/// </summary>
public class FrmEdsFile : System.Windows.Forms.Form
{
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox4;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.GroupBox groupBox2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.TextBox textBox6;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.TextBox textBox7;
private System.Windows.Forms.Label label7;
private System.Windows.Forms.TextBox textBox8;
private System.Windows.Forms.Label label8;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public FrmEdsFile()
{
//
// 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.groupBox1 = new System.Windows.Forms.GroupBox();
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.textBox4 = new System.Windows.Forms.TextBox();
this.label4 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.groupBox2 = new System.Windows.Forms.GroupBox();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.textBox6 = new System.Windows.Forms.TextBox();
this.label6 = new System.Windows.Forms.Label();
this.textBox7 = new System.Windows.Forms.TextBox();
this.label7 = new System.Windows.Forms.Label();
this.textBox8 = new System.Windows.Forms.TextBox();
this.label8 = new System.Windows.Forms.Label();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.groupBox1.SuspendLayout();
this.groupBox2.SuspendLayout();
this.SuspendLayout();
//
// groupBox1
//
this.groupBox1.Controls.Add(this.button2);
this.groupBox1.Controls.Add(this.button1);
this.groupBox1.Controls.Add(this.textBox4);
this.groupBox1.Controls.Add(this.label4);
this.groupBox1.Controls.Add(this.textBox3);
this.groupBox1.Controls.Add(this.label3);
this.groupBox1.Controls.Add(this.textBox2);
this.groupBox1.Controls.Add(this.label2);
this.groupBox1.Controls.Add(this.textBox1);
this.groupBox1.Controls.Add(this.label1);
this.groupBox1.Location = new System.Drawing.Point(8, 8);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(336, 120);
this.groupBox1.TabIndex = 0;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "加密文件设置";
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(96, 16);
this.label1.TabIndex = 0;
this.label1.Text = "被加密文件名：";
//
// textBox1
//
this.textBox1.BackColor = System.Drawing.SystemColors.Control;
this.textBox1.Location = new System.Drawing.Point(104, 16);
this.textBox1.Name = "textBox1";
this.textBox1.ReadOnly = true;
this.textBox1.Size = new System.Drawing.Size(224, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(120, 40);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(208, 21);
this.textBox2.TabIndex = 3;
this.textBox2.Text = "";
//
// label2
//
this.label2.Location = new System.Drawing.Point(8, 48);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(104, 16);
this.label2.TabIndex = 2;
this.label2.Text = "加密输出文件名：";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(120, 64);
this.textBox3.Name = "textBox3";
this.textBox3.PasswordChar = '*';
this.textBox3.Size = new System.Drawing.Size(120, 21);
this.textBox3.TabIndex = 5;
this.textBox3.Text = "";
//
// label3
//
this.label3.Location = new System.Drawing.Point(8, 72);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(128, 16);
this.label3.TabIndex = 4;
this.label3.Text = "设定密码(大于6位)：";
//
// textBox4
//
this.textBox4.Location = new System.Drawing.Point(120, 88);
this.textBox4.Name = "textBox4";
this.textBox4.PasswordChar = '*';
this.textBox4.Size = new System.Drawing.Size(120, 21);
this.textBox4.TabIndex = 7;
this.textBox4.Text = "";
//
// label4
//
this.label4.Location = new System.Drawing.Point(8, 96);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(104, 16);
this.label4.TabIndex = 6;
this.label4.Text = "重复设定的密码：";
//
// button1
//
this.button1.Location = new System.Drawing.Point(248, 64);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(80, 23);
this.button1.TabIndex = 8;
this.button1.Text = "浏览文件";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(248, 88);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(80, 23);
this.button2.TabIndex = 9;
this.button2.Text = "加密文件";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// groupBox2
//
this.groupBox2.Controls.Add(this.button3);
this.groupBox2.Controls.Add(this.button4);
this.groupBox2.Controls.Add(this.textBox6);
this.groupBox2.Controls.Add(this.label6);
this.groupBox2.Controls.Add(this.textBox7);
this.groupBox2.Controls.Add(this.label7);
this.groupBox2.Controls.Add(this.textBox8);
this.groupBox2.Controls.Add(this.label8);
this.groupBox2.Location = new System.Drawing.Point(8, 136);
this.groupBox2.Name = "groupBox2";
this.groupBox2.Size = new System.Drawing.Size(336, 96);
this.groupBox2.TabIndex = 1;
this.groupBox2.TabStop = false;
this.groupBox2.Text = "解密文件设置";
//
// button3
//
this.button3.Location = new System.Drawing.Point(248, 64);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(80, 23);
this.button3.TabIndex = 9;
this.button3.Text = "解密文件";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(168, 64);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(80, 23);
this.button4.TabIndex = 8;
this.button4.Text = "浏览文件";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// textBox6
//
this.textBox6.Location = new System.Drawing.Point(80, 64);
this.textBox6.Name = "textBox6";
this.textBox6.PasswordChar = '*';
this.textBox6.Size = new System.Drawing.Size(88, 21);
this.textBox6.TabIndex = 5;
this.textBox6.Text = "";
//
// label6
//
this.label6.Location = new System.Drawing.Point(8, 72);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(72, 16);
this.label6.TabIndex = 4;
this.label6.Text = "输入密码：";
//
// textBox7
//
this.textBox7.Location = new System.Drawing.Point(120, 40);
this.textBox7.Name = "textBox7";
this.textBox7.Size = new System.Drawing.Size(208, 21);
this.textBox7.TabIndex = 3;
this.textBox7.Text = "";
//
// label7
//
this.label7.Location = new System.Drawing.Point(8, 48);
this.label7.Name = "label7";
this.label7.Size = new System.Drawing.Size(104, 16);
this.label7.TabIndex = 2;
this.label7.Text = "解密输出文件名：";
//
// textBox8
//
this.textBox8.BackColor = System.Drawing.SystemColors.Control;
this.textBox8.Location = new System.Drawing.Point(104, 16);
this.textBox8.Name = "textBox8";
this.textBox8.ReadOnly = true;
this.textBox8.Size = new System.Drawing.Size(224, 21);
this.textBox8.TabIndex = 1;
this.textBox8.Text = "";
//
// label8
//
this.label8.Location = new System.Drawing.Point(8, 24);
this.label8.Name = "label8";
this.label8.Size = new System.Drawing.Size(96, 16);
this.label8.TabIndex = 0;
this.label8.Text = "已加密文件名：";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(352, 238);
this.Controls.Add(this.groupBox2);
this.Controls.Add(this.groupBox1);
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "演示加解密文件";
this.groupBox1.ResumeLayout(false);
this.groupBox2.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new FrmEdsFile());
}
private void button1_Click(object sender, System.EventArgs e)
{//浏览被加密文件
if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
{
this.textBox1.Text=this.openFileDialog1.FileName;
}
}
private void button2_Click(object sender, System.EventArgs e)
{//加密文件
if(this.textBox1.Text=="")
{//检查被加密文件
MessageBox.Show("请选择被加密文件！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
if(this.textBox2.Text=="")
{//检查加密输出文件
MessageBox.Show("请输入加密输出文件！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
if (this.textBox3.Text.Length<6 | this.textBox3.Text!=this.textBox4.Text)
{//检查密码输入是否正确
MessageBox.Show("请输入正确的密码！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
//获得被加密文件名
string MyInFileName=this.textBox1.Text;
//获得加密输出文件名
string MyOutFileName=this.textBox2.Text;
//设定初始向量
byte[] MyDESIV={0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
byte[] MyDESKey={};
//根据密码设置密钥大小
string MyKeyString=this.textBox3.Text;
if (MyKeyString.Length==6)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
0x07,0x08};
}
if (MyKeyString.Length==7)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
(byte)MyKeyString[6],0x07};
}
if (MyKeyString.Length>=8)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
(byte)MyKeyString[6],(byte)MyKeyString[7]};
}
//创建输入和输出文件流
FileStream MyInFileStream = new FileStream(MyInFileName, FileMode.Open, FileAccess.Read);
FileStream MyOutFileStream = new FileStream(MyOutFileName, FileMode.OpenOrCreate, FileAccess.Write);
MyOutFileStream.SetLength(0);
//每次的中间流.
byte[] InsertData = new byte[100];
//代表已经加密流的大小
int CompletedLength=0;
//代表要加密文件总的大小
long InFileSize = MyInFileStream.Length;
//创建DES对象
DES MyDES = new DESCryptoServiceProvider();
//创建加密流
CryptoStream EncryptStream = new CryptoStream(MyOutFileStream, MyDES.CreateEncryptor(MyDESKey, MyDESIV), CryptoStreamMode.Write);
//从输入文件中读取流，然后加密到输出文件中
while(CompletedLength < InFileSize)
{ //每次写入加密文件的数据大小
int Length= MyInFileStream.Read(InsertData, 0, 100);
EncryptStream.Write(InsertData, 0, Length);
CompletedLength = CompletedLength + Length;
}
//关闭流
EncryptStream.Close();
MyOutFileStream.Close();
MyInFileStream.Close();
MessageBox.Show("文件加密已经操作成功！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
}
private void button4_Click(object sender, System.EventArgs e)
{//浏览被解密文件
if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
{
this.textBox8.Text=this.openFileDialog1.FileName;
}
}
private void button3_Click(object sender, System.EventArgs e)
{//解密文件
if(this.textBox8.Text=="")
{//检查被解密文件
MessageBox.Show("请选择被解密文件！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
if(this.textBox7.Text=="")
{//检查解密输出文件
MessageBox.Show("请输入解密输出文件！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
if (this.textBox6.Text.Length<6 )
{//检查密码是否输入
MessageBox.Show("请输入正确的密码！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
try
{
//获得要解密的文件名
string MyInFileName=this.textBox8.Text;
//获得要保存的文件名
string MyOutFileName=this.textBox7.Text;
//设定初始向量
byte[] MyDESIV={0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
byte[] MyDESKey={};
//根据密码算出密钥
string MyKeyString=this.textBox6.Text;
if (MyKeyString.Length==6)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
0x07,0x08};
}
if (MyKeyString.Length==7)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
(byte)MyKeyString[6],0x07};
}
if (MyKeyString.Length>=8)
{
MyDESKey=new byte[]{(byte)MyKeyString[0],(byte)MyKeyString[1],(byte)MyKeyString[2],
(byte)MyKeyString[3],(byte)MyKeyString[4],(byte)MyKeyString[5],
(byte)MyKeyString[6],(byte)MyKeyString[7]};
}
//创建输入和输出文件流
FileStream MyInFileStream = new FileStream(MyInFileName, FileMode.Open, FileAccess.Read);
FileStream MyOutFileStream = new FileStream(MyOutFileName, FileMode.OpenOrCreate, FileAccess.Write);
MyOutFileStream.SetLength(0);
//每次的中间流.
byte[] InsertData = new byte[100];
//代表已经解密的流的大小
int MyCompletedSize=0;
//代表要解密文件总的大小
long MyFileSize = MyInFileStream.Length;
//创建DES对象
DES MyDES= new DESCryptoServiceProvider();
//创建解密流
CryptoStream DecryptStream = new CryptoStream(MyOutFileStream, MyDES.CreateDecryptor(MyDESKey,MyDESIV), CryptoStreamMode.Write);
//从输入文件中读取流，然后解密到输出文件中
while(MyCompletedSize < MyFileSize)
{ //每次写入解密流的大小
int length = MyInFileStream.Read(InsertData, 0, 100);
DecryptStream.Write(InsertData, 0, length);
MyCompletedSize=MyCompletedSize+length;
}
//关闭流
DecryptStream.Close();
MyOutFileStream.Close();
MyInFileStream.Close();
MessageBox.Show("文件解密操作成功！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
}
catch (Exception Err)
{
MessageBox.Show("文件解密操作有误: "+Err.Message,"信息提示",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
}
}
浙公网安备 33010602011771号