📄 form1.cs
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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 Form1());
}
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);
}
}
}
}
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