使用对称算法加密解密文件

2023年5月14日 229次阅读 来源: 加密算法

 

EncryptFile:

Form1.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code
《使用对称算法加密解密文件》

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.IO;
10 using System.Security.Cryptography;
11 
12 namespace EncryptFile
13 {
14     public partial class Form1 : Form
15     {
16         public Form1()
17         {
18             InitializeComponent();
19         }
20 
21         private void button1_Click(object sender, EventArgs e)
22         {
23             openFileDialog1.Filter = "*.*|*.*";
24             openFileDialog1.ShowDialog();
25             textBox1.Text = openFileDialog1.FileName;
26             button2.Enabled = true;
27         }
28 
29         private void button2_Click(object sender, EventArgs e)
30         {
31             string myFile = textBox1.Text;
32             string myPassword = textBox2.Text;
33             string myEnFile = textBox3.Text;
34             try
35             {
36                 byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
37                 byte[] myKey = System.Text.Encoding.UTF8.GetBytes(myPassword);
38                 FileStream myInStream = new FileStream(myFile, FileMode.Open, FileAccess.Read);
39                 FileStream myOutStream = new FileStream(myEnFile, FileMode.OpenOrCreate, FileAccess.Write);
40                 myOutStream.SetLength(0);
41                 byte[] myBytes = new byte[100];
42                 long myInLength = 0;
43                 long myLength = myInStream.Length;
44                 DES myProvider = new DESCryptoServiceProvider();
45                 CryptoStream myCryptoStream = new CryptoStream(myOutStream, myProvider.CreateEncryptor(myKey, myIV), CryptoStreamMode.Write);
46                 while (myInLength < myLength)
47                 {
48                     int mylen = myInStream.Read(myBytes, 0, 100);
49                     myCryptoStream.Write(myBytes, 0, mylen);
50                     myInLength += mylen;
51                 }
52                 myCryptoStream.Close();
53                 myInStream.Close();
54                 myOutStream.Close();
55                 MessageBox.Show("加密文件成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
56             }
57             catch (Exception ex)
58             {
59                 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
60             }
61         }
62     }
63 }

《使用对称算法加密解密文件》

Form1.Designer.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

  1 namespace EncryptFile
  2 {
  3     partial class Form1
  4     {
  5         /// <summary>
  6 /// 必需的设计器变量。
  7 /// </summary>
  8         private System.ComponentModel.IContainer components = null;
  9 
 10         /// <summary>
 11 /// 清理所有正在使用的资源。
 12 /// </summary>
 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14         protected override void Dispose(bool disposing)
 15         {
 16             if (disposing && (components != null))
 17             {
 18                 components.Dispose();
 19             }
 20             base.Dispose(disposing);
 21         }
 22 
 23         #region Windows 窗体设计器生成的代码
 24 
 25         /// <summary>
 26 /// 设计器支持所需的方法 - 不要
 27 /// 使用代码编辑器修改此方法的内容。
 28 /// </summary>
 29         private void InitializeComponent()
 30         {
 31             this.textBox3 = new System.Windows.Forms.TextBox();
 32             this.label3 = new System.Windows.Forms.Label();
 33             this.textBox2 = new System.Windows.Forms.TextBox();
 34             this.label2 = new System.Windows.Forms.Label();
 35             this.button2 = new System.Windows.Forms.Button();
 36             this.button1 = new System.Windows.Forms.Button();
 37             this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
 38             this.textBox1 = new System.Windows.Forms.TextBox();
 39             this.label1 = new System.Windows.Forms.Label();
 40             this.SuspendLayout();
 41             // 
 42 // textBox3
 43 // 
 44             this.textBox3.Location = new System.Drawing.Point(123, 67);
 45             this.textBox3.Name = "textBox3";
 46             this.textBox3.Size = new System.Drawing.Size(105, 21);
 47             this.textBox3.TabIndex = 14;
 48             // 
 49 // label3
 50 // 
 51             this.label3.AutoSize = true;
 52             this.label3.Location = new System.Drawing.Point(11, 70);
 53             this.label3.Name = "label3";
 54             this.label3.Size = new System.Drawing.Size(101, 12);
 55             this.label3.TabIndex = 13;
 56             this.label3.Text = "加密后文件路径：";
 57             // 
 58 // textBox2
 59 // 
 60             this.textBox2.Location = new System.Drawing.Point(123, 40);
 61             this.textBox2.Name = "textBox2";
 62             this.textBox2.PasswordChar = '*';
 63             this.textBox2.Size = new System.Drawing.Size(105, 21);
 64             this.textBox2.TabIndex = 12;
 65             // 
 66 // label2
 67 // 
 68             this.label2.AutoSize = true;
 69             this.label2.Location = new System.Drawing.Point(11, 43);
 70             this.label2.Name = "label2";
 71             this.label2.Size = new System.Drawing.Size(107, 12);
 72             this.label2.TabIndex = 11;
 73             this.label2.Text = "加密密码（8位）：";
 74             // 
 75 // button2
 76 // 
 77             this.button2.Enabled = false;
 78             this.button2.Location = new System.Drawing.Point(123, 94);
 79             this.button2.Name = "button2";
 80             this.button2.Size = new System.Drawing.Size(78, 23);
 81             this.button2.TabIndex = 8;
 82             this.button2.Text = "加密";
 83             this.button2.UseVisualStyleBackColor = true;
 84             this.button2.Click += new System.EventHandler(this.button2_Click);
 85             // 
 86 // button1
 87 // 
 88             this.button1.Location = new System.Drawing.Point(232, 11);
 89             this.button1.Name = "button1";
 90             this.button1.Size = new System.Drawing.Size(38, 23);
 91             this.button1.TabIndex = 7;
 92             this.button1.Text = "选择";
 93             this.button1.UseVisualStyleBackColor = true;
 94             this.button1.Click += new System.EventHandler(this.button1_Click);
 95             // 
 96 // textBox1
 97 // 
 98             this.textBox1.Location = new System.Drawing.Point(123, 13);
 99             this.textBox1.Name = "textBox1";
100             this.textBox1.ReadOnly = true;
101             this.textBox1.Size = new System.Drawing.Size(105, 21);
102             this.textBox1.TabIndex = 10;
103             // 
104 // label1
105 // 
106             this.label1.AutoSize = true;
107             this.label1.Location = new System.Drawing.Point(11, 16);
108             this.label1.Name = "label1";
109             this.label1.Size = new System.Drawing.Size(77, 12);
110             this.label1.TabIndex = 9;
111             this.label1.Text = "原文件路径：";
112             // 
113 // Form1
114 // 
115             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
116             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
117             this.ClientSize = new System.Drawing.Size(283, 129);
118             this.Controls.Add(this.textBox3);
119             this.Controls.Add(this.label3);
120             this.Controls.Add(this.textBox2);
121             this.Controls.Add(this.label2);
122             this.Controls.Add(this.button2);
123             this.Controls.Add(this.button1);
124             this.Controls.Add(this.textBox1);
125             this.Controls.Add(this.label1);
126             this.MaximizeBox = false;
127             this.MinimizeBox = false;
128             this.Name = "Form1";
129             this.ShowInTaskbar = false;
130             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
131             this.Text = "使用对称算法加密文件";
132             this.ResumeLayout(false);
133             this.PerformLayout();
134 
135         }
136 
137         #endregion
138 
139         private System.Windows.Forms.TextBox textBox3;
140         private System.Windows.Forms.Label label3;
141         private System.Windows.Forms.TextBox textBox2;
142         private System.Windows.Forms.Label label2;
143         private System.Windows.Forms.Button button2;
144         private System.Windows.Forms.Button button1;
145         private System.Windows.Forms.OpenFileDialog openFileDialog1;
146         private System.Windows.Forms.TextBox textBox1;
147         private System.Windows.Forms.Label label1;
148     }
149 }

UnEncryptFile:

Form1.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.IO;
10 using System.Security.Cryptography;
11 
12 namespace UnEncryptFile
13 {
14     public partial class Form1 : Form
15     {
16         public Form1()
17         {
18             InitializeComponent();
19         }
20 
21         private void button1_Click(object sender, EventArgs e)
22         {
23             openFileDialog1.Filter = "*.*|*.*";
24             openFileDialog1.ShowDialog();
25             textBox1.Text = openFileDialog1.FileName;
26             button2.Enabled = true;
27         }
28 
29         private void button2_Click(object sender, EventArgs e)
30         {
31             string str1 = textBox1.Text;
32             string strPwd = textBox2.Text;
33             string str2 = textBox3.Text;
34             try
35             {
36                 byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
37                 byte[] myKey = System.Text.Encoding.UTF8.GetBytes(strPwd);
38                 FileStream myFileIn = new FileStream(str1, FileMode.Open, FileAccess.Read);
39                 FileStream myFileOut = new FileStream(str2, FileMode.OpenOrCreate, FileAccess.Write);
40                 myFileOut.SetLength(0);
41                 byte[] myBytes = new byte[100];
42                 long myLength = myFileIn.Length;
43                 long myInLength = 0;
44                 DES myProvider = new DESCryptoServiceProvider();
45                 CryptoStream myDeStream = new CryptoStream(myFileOut, myProvider.CreateDecryptor(myKey, myIV), CryptoStreamMode.Write);
46                 while (myInLength < myLength)
47                 {
48                     int mylen = myFileIn.Read(myBytes, 0, 100);
49                     myDeStream.Write(myBytes, 0, mylen);
50                     myInLength += mylen;
51                 }
52                 myDeStream.Close();
53                 myFileOut.Close();
54                 myFileIn.Close();
55                 MessageBox.Show("解密文件成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
56             }
57             catch (Exception ex)
58             {
59                 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
60             }
61         }
62     }
63 }

Form1.Designer.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

  1 namespace UnEncryptFile
  2 {
  3     partial class Form1
  4     {
  5         /// <summary>
  6 /// 必需的设计器变量。
  7 /// </summary>
  8         private System.ComponentModel.IContainer components = null;
  9 
 10         /// <summary>
 11 /// 清理所有正在使用的资源。
 12 /// </summary>
 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14         protected override void Dispose(bool disposing)
 15         {
 16             if (disposing && (components != null))
 17             {
 18                 components.Dispose();
 19             }
 20             base.Dispose(disposing);
 21         }
 22 
 23         #region Windows 窗体设计器生成的代码
 24 
 25         /// <summary>
 26 /// 设计器支持所需的方法 - 不要
 27 /// 使用代码编辑器修改此方法的内容。
 28 /// </summary>
 29         private void InitializeComponent()
 30         {
 31             this.textBox3 = new System.Windows.Forms.TextBox();
 32             this.label3 = new System.Windows.Forms.Label();
 33             this.textBox2 = new System.Windows.Forms.TextBox();
 34             this.label2 = new System.Windows.Forms.Label();
 35             this.textBox1 = new System.Windows.Forms.TextBox();
 36             this.button2 = new System.Windows.Forms.Button();
 37             this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
 38             this.label1 = new System.Windows.Forms.Label();
 39             this.button1 = new System.Windows.Forms.Button();
 40             this.SuspendLayout();
 41             // 
 42 // textBox3
 43 // 
 44             this.textBox3.Location = new System.Drawing.Point(126, 67);
 45             this.textBox3.Name = "textBox3";
 46             this.textBox3.Size = new System.Drawing.Size(100, 21);
 47             this.textBox3.TabIndex = 14;
 48             // 
 49 // label3
 50 // 
 51             this.label3.AutoSize = true;
 52             this.label3.Location = new System.Drawing.Point(18, 70);
 53             this.label3.Name = "label3";
 54             this.label3.Size = new System.Drawing.Size(101, 12);
 55             this.label3.TabIndex = 13;
 56             this.label3.Text = "解密后文件路径：";
 57             // 
 58 // textBox2
 59 // 
 60             this.textBox2.Location = new System.Drawing.Point(126, 40);
 61             this.textBox2.Name = "textBox2";
 62             this.textBox2.PasswordChar = '*';
 63             this.textBox2.Size = new System.Drawing.Size(100, 21);
 64             this.textBox2.TabIndex = 12;
 65             // 
 66 // label2
 67 // 
 68             this.label2.AutoSize = true;
 69             this.label2.Location = new System.Drawing.Point(18, 43);
 70             this.label2.Name = "label2";
 71             this.label2.Size = new System.Drawing.Size(107, 12);
 72             this.label2.TabIndex = 11;
 73             this.label2.Text = "解密密码（8位）：";
 74             // 
 75 // textBox1
 76 // 
 77             this.textBox1.Location = new System.Drawing.Point(126, 13);
 78             this.textBox1.Name = "textBox1";
 79             this.textBox1.ReadOnly = true;
 80             this.textBox1.Size = new System.Drawing.Size(100, 21);
 81             this.textBox1.TabIndex = 10;
 82             // 
 83 // button2
 84 // 
 85             this.button2.Enabled = false;
 86             this.button2.Location = new System.Drawing.Point(126, 94);
 87             this.button2.Name = "button2";
 88             this.button2.Size = new System.Drawing.Size(78, 23);
 89             this.button2.TabIndex = 7;
 90             this.button2.Text = "解密";
 91             this.button2.UseVisualStyleBackColor = true;
 92             this.button2.Click += new System.EventHandler(this.button2_Click);
 93             // 
 94 // openFileDialog1
 95 // 
 96             this.openFileDialog1.FileName = "openFileDialog1";
 97             // 
 98 // label1
 99 // 
100             this.label1.AutoSize = true;
101             this.label1.Location = new System.Drawing.Point(18, 16);
102             this.label1.Name = "label1";
103             this.label1.Size = new System.Drawing.Size(77, 12);
104             this.label1.TabIndex = 9;
105             this.label1.Text = "原文件路径：";
106             // 
107 // button1
108 // 
109             this.button1.Location = new System.Drawing.Point(229, 11);
110             this.button1.Name = "button1";
111             this.button1.Size = new System.Drawing.Size(38, 23);
112             this.button1.TabIndex = 8;
113             this.button1.Text = "选择";
114             this.button1.UseVisualStyleBackColor = true;
115             this.button1.Click += new System.EventHandler(this.button1_Click);
116             // 
117 // Form1
118 // 
119             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
120             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
121             this.ClientSize = new System.Drawing.Size(283, 129);
122             this.Controls.Add(this.textBox3);
123             this.Controls.Add(this.label3);
124             this.Controls.Add(this.textBox2);
125             this.Controls.Add(this.label2);
126             this.Controls.Add(this.textBox1);
127             this.Controls.Add(this.button2);
128             this.Controls.Add(this.label1);
129             this.Controls.Add(this.button1);
130             this.MaximizeBox = false;
131             this.MinimizeBox = false;
132             this.Name = "Form1";
133             this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;
134             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
135             this.Text = "使用对称算法解密文件";
136             this.ResumeLayout(false);
137             this.PerformLayout();
138 
139         }
140 
141         #endregion
142 
143         private System.Windows.Forms.TextBox textBox3;
144         private System.Windows.Forms.Label label3;
145         private System.Windows.Forms.TextBox textBox2;
146         private System.Windows.Forms.Label label2;
147         private System.Windows.Forms.TextBox textBox1;
148         private System.Windows.Forms.Button button2;
149         private System.Windows.Forms.OpenFileDialog openFileDialog1;
150         private System.Windows.Forms.Label label1;
151         private System.Windows.Forms.Button button1;
152     }
153 }

作者：
墨明棋妙

出处：
http://www.cnblogs.com/ynbt/

关于作者：专注于.Net、WCF和移动互联网开发。

本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，如有问题，可以通过ynbt_wang@163.com联系我，非常感谢。 。,

EncryptFile:

Form1.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code
《使用对称算法加密解密文件》

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.IO;
10 using System.Security.Cryptography;
11 
12 namespace EncryptFile
13 {
14     public partial class Form1 : Form
15     {
16         public Form1()
17         {
18             InitializeComponent();
19         }
20 
21         private void button1_Click(object sender, EventArgs e)
22         {
23             openFileDialog1.Filter = "*.*|*.*";
24             openFileDialog1.ShowDialog();
25             textBox1.Text = openFileDialog1.FileName;
26             button2.Enabled = true;
27         }
28 
29         private void button2_Click(object sender, EventArgs e)
30         {
31             string myFile = textBox1.Text;
32             string myPassword = textBox2.Text;
33             string myEnFile = textBox3.Text;
34             try
35             {
36                 byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
37                 byte[] myKey = System.Text.Encoding.UTF8.GetBytes(myPassword);
38                 FileStream myInStream = new FileStream(myFile, FileMode.Open, FileAccess.Read);
39                 FileStream myOutStream = new FileStream(myEnFile, FileMode.OpenOrCreate, FileAccess.Write);
40                 myOutStream.SetLength(0);
41                 byte[] myBytes = new byte[100];
42                 long myInLength = 0;
43                 long myLength = myInStream.Length;
44                 DES myProvider = new DESCryptoServiceProvider();
45                 CryptoStream myCryptoStream = new CryptoStream(myOutStream, myProvider.CreateEncryptor(myKey, myIV), CryptoStreamMode.Write);
46                 while (myInLength < myLength)
47                 {
48                     int mylen = myInStream.Read(myBytes, 0, 100);
49                     myCryptoStream.Write(myBytes, 0, mylen);
50                     myInLength += mylen;
51                 }
52                 myCryptoStream.Close();
53                 myInStream.Close();
54                 myOutStream.Close();
55                 MessageBox.Show("加密文件成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
56             }
57             catch (Exception ex)
58             {
59                 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
60             }
61         }
62     }
63 }

《使用对称算法加密解密文件》

Form1.Designer.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

  1 namespace EncryptFile
  2 {
  3     partial class Form1
  4     {
  5         /// <summary>
  6 /// 必需的设计器变量。
  7 /// </summary>
  8         private System.ComponentModel.IContainer components = null;
  9 
 10         /// <summary>
 11 /// 清理所有正在使用的资源。
 12 /// </summary>
 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14         protected override void Dispose(bool disposing)
 15         {
 16             if (disposing && (components != null))
 17             {
 18                 components.Dispose();
 19             }
 20             base.Dispose(disposing);
 21         }
 22 
 23         #region Windows 窗体设计器生成的代码
 24 
 25         /// <summary>
 26 /// 设计器支持所需的方法 - 不要
 27 /// 使用代码编辑器修改此方法的内容。
 28 /// </summary>
 29         private void InitializeComponent()
 30         {
 31             this.textBox3 = new System.Windows.Forms.TextBox();
 32             this.label3 = new System.Windows.Forms.Label();
 33             this.textBox2 = new System.Windows.Forms.TextBox();
 34             this.label2 = new System.Windows.Forms.Label();
 35             this.button2 = new System.Windows.Forms.Button();
 36             this.button1 = new System.Windows.Forms.Button();
 37             this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
 38             this.textBox1 = new System.Windows.Forms.TextBox();
 39             this.label1 = new System.Windows.Forms.Label();
 40             this.SuspendLayout();
 41             // 
 42 // textBox3
 43 // 
 44             this.textBox3.Location = new System.Drawing.Point(123, 67);
 45             this.textBox3.Name = "textBox3";
 46             this.textBox3.Size = new System.Drawing.Size(105, 21);
 47             this.textBox3.TabIndex = 14;
 48             // 
 49 // label3
 50 // 
 51             this.label3.AutoSize = true;
 52             this.label3.Location = new System.Drawing.Point(11, 70);
 53             this.label3.Name = "label3";
 54             this.label3.Size = new System.Drawing.Size(101, 12);
 55             this.label3.TabIndex = 13;
 56             this.label3.Text = "加密后文件路径：";
 57             // 
 58 // textBox2
 59 // 
 60             this.textBox2.Location = new System.Drawing.Point(123, 40);
 61             this.textBox2.Name = "textBox2";
 62             this.textBox2.PasswordChar = '*';
 63             this.textBox2.Size = new System.Drawing.Size(105, 21);
 64             this.textBox2.TabIndex = 12;
 65             // 
 66 // label2
 67 // 
 68             this.label2.AutoSize = true;
 69             this.label2.Location = new System.Drawing.Point(11, 43);
 70             this.label2.Name = "label2";
 71             this.label2.Size = new System.Drawing.Size(107, 12);
 72             this.label2.TabIndex = 11;
 73             this.label2.Text = "加密密码（8位）：";
 74             // 
 75 // button2
 76 // 
 77             this.button2.Enabled = false;
 78             this.button2.Location = new System.Drawing.Point(123, 94);
 79             this.button2.Name = "button2";
 80             this.button2.Size = new System.Drawing.Size(78, 23);
 81             this.button2.TabIndex = 8;
 82             this.button2.Text = "加密";
 83             this.button2.UseVisualStyleBackColor = true;
 84             this.button2.Click += new System.EventHandler(this.button2_Click);
 85             // 
 86 // button1
 87 // 
 88             this.button1.Location = new System.Drawing.Point(232, 11);
 89             this.button1.Name = "button1";
 90             this.button1.Size = new System.Drawing.Size(38, 23);
 91             this.button1.TabIndex = 7;
 92             this.button1.Text = "选择";
 93             this.button1.UseVisualStyleBackColor = true;
 94             this.button1.Click += new System.EventHandler(this.button1_Click);
 95             // 
 96 // textBox1
 97 // 
 98             this.textBox1.Location = new System.Drawing.Point(123, 13);
 99             this.textBox1.Name = "textBox1";
100             this.textBox1.ReadOnly = true;
101             this.textBox1.Size = new System.Drawing.Size(105, 21);
102             this.textBox1.TabIndex = 10;
103             // 
104 // label1
105 // 
106             this.label1.AutoSize = true;
107             this.label1.Location = new System.Drawing.Point(11, 16);
108             this.label1.Name = "label1";
109             this.label1.Size = new System.Drawing.Size(77, 12);
110             this.label1.TabIndex = 9;
111             this.label1.Text = "原文件路径：";
112             // 
113 // Form1
114 // 
115             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
116             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
117             this.ClientSize = new System.Drawing.Size(283, 129);
118             this.Controls.Add(this.textBox3);
119             this.Controls.Add(this.label3);
120             this.Controls.Add(this.textBox2);
121             this.Controls.Add(this.label2);
122             this.Controls.Add(this.button2);
123             this.Controls.Add(this.button1);
124             this.Controls.Add(this.textBox1);
125             this.Controls.Add(this.label1);
126             this.MaximizeBox = false;
127             this.MinimizeBox = false;
128             this.Name = "Form1";
129             this.ShowInTaskbar = false;
130             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
131             this.Text = "使用对称算法加密文件";
132             this.ResumeLayout(false);
133             this.PerformLayout();
134 
135         }
136 
137         #endregion
138 
139         private System.Windows.Forms.TextBox textBox3;
140         private System.Windows.Forms.Label label3;
141         private System.Windows.Forms.TextBox textBox2;
142         private System.Windows.Forms.Label label2;
143         private System.Windows.Forms.Button button2;
144         private System.Windows.Forms.Button button1;
145         private System.Windows.Forms.OpenFileDialog openFileDialog1;
146         private System.Windows.Forms.TextBox textBox1;
147         private System.Windows.Forms.Label label1;
148     }
149 }

UnEncryptFile:

Form1.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 using System.IO;
10 using System.Security.Cryptography;
11 
12 namespace UnEncryptFile
13 {
14     public partial class Form1 : Form
15     {
16         public Form1()
17         {
18             InitializeComponent();
19         }
20 
21         private void button1_Click(object sender, EventArgs e)
22         {
23             openFileDialog1.Filter = "*.*|*.*";
24             openFileDialog1.ShowDialog();
25             textBox1.Text = openFileDialog1.FileName;
26             button2.Enabled = true;
27         }
28 
29         private void button2_Click(object sender, EventArgs e)
30         {
31             string str1 = textBox1.Text;
32             string strPwd = textBox2.Text;
33             string str2 = textBox3.Text;
34             try
35             {
36                 byte[] myIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
37                 byte[] myKey = System.Text.Encoding.UTF8.GetBytes(strPwd);
38                 FileStream myFileIn = new FileStream(str1, FileMode.Open, FileAccess.Read);
39                 FileStream myFileOut = new FileStream(str2, FileMode.OpenOrCreate, FileAccess.Write);
40                 myFileOut.SetLength(0);
41                 byte[] myBytes = new byte[100];
42                 long myLength = myFileIn.Length;
43                 long myInLength = 0;
44                 DES myProvider = new DESCryptoServiceProvider();
45                 CryptoStream myDeStream = new CryptoStream(myFileOut, myProvider.CreateDecryptor(myKey, myIV), CryptoStreamMode.Write);
46                 while (myInLength < myLength)
47                 {
48                     int mylen = myFileIn.Read(myBytes, 0, 100);
49                     myDeStream.Write(myBytes, 0, mylen);
50                     myInLength += mylen;
51                 }
52                 myDeStream.Close();
53                 myFileOut.Close();
54                 myFileIn.Close();
55                 MessageBox.Show("解密文件成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
56             }
57             catch (Exception ex)
58             {
59                 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
60             }
61         }
62     }
63 }

Form1.Designer.cs

《使用对称算法加密解密文件》
《使用对称算法加密解密文件》
View Code 

  1 namespace UnEncryptFile
  2 {
  3     partial class Form1
  4     {
  5         /// <summary>
  6 /// 必需的设计器变量。
  7 /// </summary>
  8         private System.ComponentModel.IContainer components = null;
  9 
 10         /// <summary>
 11 /// 清理所有正在使用的资源。
 12 /// </summary>
 13 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14         protected override void Dispose(bool disposing)
 15         {
 16             if (disposing && (components != null))
 17             {
 18                 components.Dispose();
 19             }
 20             base.Dispose(disposing);
 21         }
 22 
 23         #region Windows 窗体设计器生成的代码
 24 
 25         /// <summary>
 26 /// 设计器支持所需的方法 - 不要
 27 /// 使用代码编辑器修改此方法的内容。
 28 /// </summary>
 29         private void InitializeComponent()
 30         {
 31             this.textBox3 = new System.Windows.Forms.TextBox();
 32             this.label3 = new System.Windows.Forms.Label();
 33             this.textBox2 = new System.Windows.Forms.TextBox();
 34             this.label2 = new System.Windows.Forms.Label();
 35             this.textBox1 = new System.Windows.Forms.TextBox();
 36             this.button2 = new System.Windows.Forms.Button();
 37             this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
 38             this.label1 = new System.Windows.Forms.Label();
 39             this.button1 = new System.Windows.Forms.Button();
 40             this.SuspendLayout();
 41             // 
 42 // textBox3
 43 // 
 44             this.textBox3.Location = new System.Drawing.Point(126, 67);
 45             this.textBox3.Name = "textBox3";
 46             this.textBox3.Size = new System.Drawing.Size(100, 21);
 47             this.textBox3.TabIndex = 14;
 48             // 
 49 // label3
 50 // 
 51             this.label3.AutoSize = true;
 52             this.label3.Location = new System.Drawing.Point(18, 70);
 53             this.label3.Name = "label3";
 54             this.label3.Size = new System.Drawing.Size(101, 12);
 55             this.label3.TabIndex = 13;
 56             this.label3.Text = "解密后文件路径：";
 57             // 
 58 // textBox2
 59 // 
 60             this.textBox2.Location = new System.Drawing.Point(126, 40);
 61             this.textBox2.Name = "textBox2";
 62             this.textBox2.PasswordChar = '*';
 63             this.textBox2.Size = new System.Drawing.Size(100, 21);
 64             this.textBox2.TabIndex = 12;
 65             // 
 66 // label2
 67 // 
 68             this.label2.AutoSize = true;
 69             this.label2.Location = new System.Drawing.Point(18, 43);
 70             this.label2.Name = "label2";
 71             this.label2.Size = new System.Drawing.Size(107, 12);
 72             this.label2.TabIndex = 11;
 73             this.label2.Text = "解密密码（8位）：";
 74             // 
 75 // textBox1
 76 // 
 77             this.textBox1.Location = new System.Drawing.Point(126, 13);
 78             this.textBox1.Name = "textBox1";
 79             this.textBox1.ReadOnly = true;
 80             this.textBox1.Size = new System.Drawing.Size(100, 21);
 81             this.textBox1.TabIndex = 10;
 82             // 
 83 // button2
 84 // 
 85             this.button2.Enabled = false;
 86             this.button2.Location = new System.Drawing.Point(126, 94);
 87             this.button2.Name = "button2";
 88             this.button2.Size = new System.Drawing.Size(78, 23);
 89             this.button2.TabIndex = 7;
 90             this.button2.Text = "解密";
 91             this.button2.UseVisualStyleBackColor = true;
 92             this.button2.Click += new System.EventHandler(this.button2_Click);
 93             // 
 94 // openFileDialog1
 95 // 
 96             this.openFileDialog1.FileName = "openFileDialog1";
 97             // 
 98 // label1
 99 // 
100             this.label1.AutoSize = true;
101             this.label1.Location = new System.Drawing.Point(18, 16);
102             this.label1.Name = "label1";
103             this.label1.Size = new System.Drawing.Size(77, 12);
104             this.label1.TabIndex = 9;
105             this.label1.Text = "原文件路径：";
106             // 
107 // button1
108 // 
109             this.button1.Location = new System.Drawing.Point(229, 11);
110             this.button1.Name = "button1";
111             this.button1.Size = new System.Drawing.Size(38, 23);
112             this.button1.TabIndex = 8;
113             this.button1.Text = "选择";
114             this.button1.UseVisualStyleBackColor = true;
115             this.button1.Click += new System.EventHandler(this.button1_Click);
116             // 
117 // Form1
118 // 
119             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
120             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
121             this.ClientSize = new System.Drawing.Size(283, 129);
122             this.Controls.Add(this.textBox3);
123             this.Controls.Add(this.label3);
124             this.Controls.Add(this.textBox2);
125             this.Controls.Add(this.label2);
126             this.Controls.Add(this.textBox1);
127             this.Controls.Add(this.button2);
128             this.Controls.Add(this.label1);
129             this.Controls.Add(this.button1);
130             this.MaximizeBox = false;
131             this.MinimizeBox = false;
132             this.Name = "Form1";
133             this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;
134             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
135             this.Text = "使用对称算法解密文件";
136             this.ResumeLayout(false);
137             this.PerformLayout();
138 
139         }
140 
141         #endregion
142 
143         private System.Windows.Forms.TextBox textBox3;
144         private System.Windows.Forms.Label label3;
145         private System.Windows.Forms.TextBox textBox2;
146         private System.Windows.Forms.Label label2;
147         private System.Windows.Forms.TextBox textBox1;
148         private System.Windows.Forms.Button button2;
149         private System.Windows.Forms.OpenFileDialog openFileDialog1;
150         private System.Windows.Forms.Label label1;
151         private System.Windows.Forms.Button button1;
152     }
153 }

    原文作者：加密算法
    原文地址: http://www.cnblogs.com/wifi/archive/2012/04/27/2473403.html
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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