看了张子阳的博客，自己也看了一些资料，于是动手写了一个对文件加密与机密的小玩意，贴出来供大家参考，呵呵，可能对于高手来说，这个东西显的十分粗糙，希望大侠能够指点一二。
首先是程序的运行界面。
在该程序中自己写了一个类CryptoHelper，用来实现对文件的加密与解密操作。下面是这个类的源代码。
1. using
2. using
3. using
4. using
5. using
6. namespace
7. {
8. class
9. {
10. private
11. private
12. private
13. private const int
14. /// <summary>
15. /// 返回每个加密方法的KEY的长度
16. /// </summary>
17. /// <param name="algrorithmName">算法名</param>
18. /// <returns>整型数组</returns>
19. /// 如果数组的第四个数据是0，那么
20. /// 数组的第一个数据是KEY的最少位
21. /// 数组的第二个数据是KEY的最大位，如果为0，说说明只支持一种位数
22. /// 数组的第三个数据是KEY的跳跃值
23. /// 如果数组的第四个数据是-1
24. /// 数组的第一个数据是KEY可以支持的第一种位数
25. /// 数组的第二个数据是KEY可以支持的第二种位数
26. /// 数组的第三个数据是KEY可以支持的第三种位数
27. public static int [] GetKeyLength(string
28. {
29. int[] Int_Key = new int[4] { 0,0,0,0};
30. switch
31. {
32. case "DES":
33. {
34. Int_Key[0] = 64;
35. Int_Key[1] = 0;
36. Int_Key[2] = 0;
37. Int_Key[3] = 0;
38. return
39. }
40. case "RC2":
41. {
42. Int_Key[0] = 40;
43. Int_Key[1] = 128;
44. Int_Key[2] = 8;
45. Int_Key[3] = 0;
46. return
47. }
48. case "Rijndael":
49. {
50. Int_Key[0] = 128;
51. Int_Key[1] = 192;
52. Int_Key[2] = 256;
53. Int_Key[3] = -1;
54. return
55. }
56. case "TripleDES":
57. {
58. Int_Key[0] = 128;
59. Int_Key[1] = 192;
60. Int_Key[2] = 64;
61. Int_Key[3] = 0;
62. return
63. }
64. }
65. return
66. }
67. /// <summary>
68. /// 构造函数，用来生成具体的加密与解密的对象
69. /// </summary>
70. /// <param name="algrorithmName">加密或者解密的算法名称</param>
71. /// <param name="Key">加密或解密的密钥</param>
72. /// <param name="IV">加密或者解密的初始化向量</param>
73. public CryptoHelper(string algrorithmName, string Key, string
74. {
75. provider = SymmetricAlgorithm.Create(algrorithmName);
76. provider.Key = Encoding.UTF8.GetBytes(Key);
77. provider.IV = Encoding.UTF8.GetBytes(IV);
78. encryptor = provider.CreateEncryptor();
79. decryptor = provider.CreateDecryptor();
80. }
81. ~CryptoHelper()
82. {
83. provider.Clear();
84. }
85. /// <summary>
86. /// 加密文件的方法
87. /// </summary>
88. /// <param name="inName">源文件名</param>
89. /// <param name="outName">目的文件名</param>
90. public void
91. {
92. //建立文件流用来处理源文件与目的文件
93. new
94. new
95. fout.SetLength(0);
96.
97. //建立变量用来处理文件的读写
98. byte[] bin = new byte[per_length]; //加密的长度
99. long rdlen = 0; //读取数据的总长度
100. long totlen = fin.Length; //输入文件的总长度
101. int len; //每次读写数据的长度
102.
103. new
104.
105. //开始加密的过程
106. while
107. {
108. len = fin.Read(bin, 0, per_length);
109. encStream.Write(bin, 0, len);
110. rdlen = rdlen + len;
111. }
112. encStream.Flush();
113. encStream.Close();
114. fout.Close();
115. fin.Close();
116. }
117. /// <summary>
118. /// 解密文件的算法
119. /// </summary>
120. /// <param name="inName">源文件名</param>
121. /// <param name="outName">目标文件名</param>
122. public void
123. {
124. //建立文件流用来处理源文件与目的文件,源文件是加密后的文件
125. new
126. new
127. fout.SetLength(0);
128.
129. //建立变量用来处理文件的读写
130. byte[] bin = new byte[per_length]; //加密的长度
131. long rdlen = 0; //读取数据的总长度
132. long totlen = fin.Length; //输入文件的总长度
133. int len; //每次读写数据的长度
134.
135. new
136.
137. //开始解密的过程
138. while
139. {
140. len = fin.Read(bin, 0, per_length);
141. decStream.Write(bin, 0, len);
142. rdlen = rdlen + len;
143. }
144. decStream.Flush();
145. decStream.Close();
146. fout.Close();
147. fin.Close();
148. }
149.
150.
151. }
152. }
下面是界面的设计
下面是界面的一些设置的代码，这些代码由系统自己生成
1. namespace
2. {
3. class
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
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
30. {
31. this.components = new
32. new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
33. this.pass_cb_style = new
34. this.label1 = new
35. this.pass_tb_first = new
36. this.pass_tb_second = new
37. this.label2 = new
38. this.label3 = new
39. this.pass_but_encrty = new
40. this.pass_but_decrty = new
41. this.del_file_checkBox = new
42. this.label4 = new
43. this.timer1 = new System.Windows.Forms.Timer(this.components);
44. this.label5 = new
45. this.SuspendLayout();
46. //
47. // pass_cb_style
48. //
49. this.pass_cb_style.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
50. this.pass_cb_style.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
51. this.pass_cb_style.Font = new System.Drawing.Font("Times New Roman", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
52. this.pass_cb_style.FormattingEnabled = true;
53. this.pass_cb_style.Items.AddRange(new object[] {
54. "DES",
55. "RC2",
56. "Rijndael",
57. "TripleDES"});
58. this.pass_cb_style.Location = new
59. this.pass_cb_style.Name = "pass_cb_style";
60. this.pass_cb_style.Size = new
61. this.pass_cb_style.TabIndex = 0;
62. this.pass_cb_style.SelectedIndexChanged += new System.EventHandler(this.pass_cb_style_SelectedIndexChanged);
63. //
64. // label1
65. //
66. this.label1.AutoSize = true;
67. this.label1.BackColor = System.Drawing.Color.Transparent;
68. this.label1.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
69. this.label1.Location = new
70. this.label1.Name = "label1";
71. this.label1.Size = new
72. this.label1.TabIndex = 1;
73. this.label1.Text = "选择加密的算法";
74. //
75. // pass_tb_first
76. //
77. this.pass_tb_first.Font = new System.Drawing.Font("Times New Roman", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
78. this.pass_tb_first.Location = new
79. this.pass_tb_first.Name = "pass_tb_first";
80. this.pass_tb_first.PasswordChar = '*';
81. this.pass_tb_first.Size = new
82. this.pass_tb_first.TabIndex = 2;
83. this.pass_tb_first.Leave += new System.EventHandler(this.pass_tb_first_Leave);
84. this.pass_tb_first.KeyUp += new System.Windows.Forms.KeyEventHandler(this.pass_tb_first_KeyUp);
85. this.pass_tb_first.Enter += new System.EventHandler(this.pass_tb_first_Enter);
86. //
87. // pass_tb_second
88. //
89. this.pass_tb_second.Font = new System.Drawing.Font("Times New Roman", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
90. this.pass_tb_second.Location = new
91. this.pass_tb_second.Name = "pass_tb_second";
92. this.pass_tb_second.PasswordChar = '*';
93. this.pass_tb_second.Size = new
94. this.pass_tb_second.TabIndex = 3;
95. this.pass_tb_second.Leave += new System.EventHandler(this.pass_tb_second_Leave);
96. this.pass_tb_second.KeyUp += new System.Windows.Forms.KeyEventHandler(this.pass_tb_second_KeyUp);
97. //
98. // label2
99. //
100. this.label2.AutoSize = true;
101. this.label2.BackColor = System.Drawing.Color.Transparent;
102. this.label2.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
103. this.label2.Location = new
104. this.label2.Name = "label2";
105. this.label2.Size = new
106. this.label2.TabIndex = 4;
107. this.label2.Text = "初次输入密码";
108. //
109. // label3
110. //
111. this.label3.AutoSize = true;
112. this.label3.BackColor = System.Drawing.Color.Transparent;
113. this.label3.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
114. this.label3.Location = new
115. this.label3.Name = "label3";
116. this.label3.Size = new
117. this.label3.TabIndex = 5;
118. this.label3.Text = "再次输入密码";
119. //
120. // pass_but_encrty
121. //
122. this.pass_but_encrty.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
123. this.pass_but_encrty.ForeColor = System.Drawing.Color.Red;
124. this.pass_but_encrty.Location = new
125. this.pass_but_encrty.Name = "pass_but_encrty";
126. this.pass_but_encrty.Size = new
127. this.pass_but_encrty.TabIndex = 6;
128. this.pass_but_encrty.Text = "加密";
129. this.pass_but_encrty.UseVisualStyleBackColor = true;
130. this.pass_but_encrty.Click += new System.EventHandler(this.pass_but_encrty_Click);
131. //
132. // pass_but_decrty
133. //
134. this.pass_but_decrty.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
135. this.pass_but_decrty.ForeColor = System.Drawing.Color.Lime;
136. this.pass_but_decrty.Location = new
137. this.pass_but_decrty.Name = "pass_but_decrty";
138. this.pass_but_decrty.Size = new
139. this.pass_but_decrty.TabIndex = 7;
140. this.pass_but_decrty.Text = "解密";
141. this.pass_but_decrty.UseVisualStyleBackColor = true;
142. this.pass_but_decrty.Click += new System.EventHandler(this.pass_but_decrty_Click);
143. //
144. // del_file_checkBox
145. //
146. this.del_file_checkBox.AutoSize = true;
147. this.del_file_checkBox.BackColor = System.Drawing.Color.Transparent;
148. this.del_file_checkBox.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
149. this.del_file_checkBox.Location = new
150. this.del_file_checkBox.Name = "del_file_checkBox";
151. this.del_file_checkBox.Size = new
152. this.del_file_checkBox.TabIndex = 8;
153. this.del_file_checkBox.Text = "删除源文件";
154. this.del_file_checkBox.UseVisualStyleBackColor = false;
155. //
156. // label4
157. //
158. this.label4.AutoSize = true;
159. this.label4.BackColor = System.Drawing.Color.Transparent;
160. this.label4.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
161. this.label4.Location = new
162. this.label4.Name = "label4";
163. this.label4.Size = new
164. this.label4.TabIndex = 10;
165. this.label4.Text = "密 码 强 度";
166. //
167. // timer1
168. //
169. this.timer1.Interval = 500;
170. this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
171. //
172. // label5
173. //
174. this.label5.AutoSize = true;
175. this.label5.BackColor = System.Drawing.Color.White;
176. this.label5.Font = new System.Drawing.Font("楷体_GB2312", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
177. this.label5.ForeColor = System.Drawing.Color.Red;
178. this.label5.Location = new
179. this.label5.Name = "label5";
180. this.label5.Size = new
181. this.label5.TabIndex = 11;
182. this.label5.Text = "非常弱";
183. //
184. // MainForm
185. //
186. this.AutoScaleDimensions = new
187. this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
188. this.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
189. this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
190. this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
191. this.ClientSize = new
192. this.Controls.Add(this.label5);
193. this.Controls.Add(this.label4);
194. this.Controls.Add(this.del_file_checkBox);
195. this.Controls.Add(this.pass_but_decrty);
196. this.Controls.Add(this.pass_but_encrty);
197. this.Controls.Add(this.label3);
198. this.Controls.Add(this.label2);
199. this.Controls.Add(this.pass_tb_second);
200. this.Controls.Add(this.pass_tb_first);
201. this.Controls.Add(this.label1);
202. this.Controls.Add(this.pass_cb_style);
203. this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
204. this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
205. this.MaximizeBox = false;
206. this.MinimizeBox = false;
207. this.Name = "MainForm";
208. this.Text = "加密与解密";
209. this.Load += new System.EventHandler(this.Form1_Load);
210. this.ResumeLayout(false);
211. this.PerformLayout();
212.
213. }
214.
215. #endregion
216.
217. private
218. private
219. private
220. private
221. private
222. private
223. private
224. private
225. private
226. private
227. private
228. private
229. }
230. }其中控件的一些名称如表所示：
控件类别 | 控件名称 | 控件的用途 |
下拉式列表框 | pass_cb_style | 用来选择加密的算法 |
文本框 | pass_tb_first | 让用户输入密码 |
文本框 | pass_tb_second | 让用户输入密码，验证密码 |
按钮 | pass_but_encrty | 加密按钮 |
按钮 | pass_but_decrty | 解密按钮 |
标签 | label5 | 指示密码强度 |
复选框 | del_file_checkBox | 是否删除源文件复选框 |
其中还放置了一个Timer控件，主要用来测试密码强度。
下面就是界面部分编制的代码了
1. using
2. using
3. using
4. using
5. using
6. using
7. using
8. using
9.
10. namespace
11. {
12. public partial class
13. {
14. private string InputFile = string.Empty;
15. private string OutputFile = string.Empty;
16. private string algrorithmName = "DES";
17. private int lowerChar = 0;//用来标志小写字母
18. private int upperChar = 0;//用来标志大写字母
19. private int numChar = 0;//用来标志数字
20. private int otherChar = 0;//用来标志其他字符
21. private int
22. private int
23.
24.
25. public
26. {
27. InitializeComponent();
28. }
29.
30. private void Form1_Load(object
31. {
32.
33. "DES";
34. false;
35. false;
36. false;
37. }
38. private void pass_but_encrty_Click(object
39. {
40. string
41. string
42. new
43. GetIOFileName();
44. if (InputFile != null && OutputFile != null)
45. {
46. try
47. {
48. encFile.EncryptFile(InputFile, OutputFile);
49. "加密成功！！！", "恭喜！成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
50. if (del_file_checkBox.Checked == true)
51. DeleteFile(InputFile);
52. }
53. catch
54. {
55. "加密失败", "十分遗憾", MessageBoxButtons.OK, MessageBoxIcon.Error);
56. }
57. }
58. }
59.
60. private void pass_but_decrty_Click(object
61. {
62. string
63. string
64. new
65. GetIOFileName();
66. if (InputFile != null && OutputFile != null)
67. {
68. try
69. {
70. decFile.DecryptFile(InputFile, OutputFile);
71. "解密成功！！！", "恭喜！成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
72. if (del_file_checkBox.Checked == true)
73. DeleteFile(InputFile);
74. }
75. catch
76. {
77. "解密失败", "十分遗憾", MessageBoxButtons.OK, MessageBoxIcon.Error);
78. }
79. }
80. }
81. /// <summary>
82. /// 删除文件的函数
83. /// </summary>
84. /// <param name="filename">文件名</param>
85. public void DeleteFile(string
86. {
87. try
88. {
89. File.Delete(filename);
90. }
91. catch
92. {
93. MessageBox.Show(e.ToString());
94. }
95. }
96. /// <summary>
97. /// 得到输入/输出的文件名
98. /// </summary>
99. public void
100. {
101. new
102. "All files (*.*)|*.*";
103. "请你选择源文件";
104. if
105. {
106. InputFile = openFile.FileName;
107. new
108. "All files (*.*)|*.*";
109. "请你选择目标文件";
110. if
111. {
112. OutputFile = saveFile.FileName;
113. if
114. {
115. null;
116. "源文件不能与目标文件为同一个文件", "错误", MessageBoxButtons.OK);
117. }
118. }
119. else
120. null;
121. }
122. else
123. null;
124. }
125. /// <summary>
126. /// 得到算法名称，默认为DES
127. /// </summary>
128. /// <param name="sender"></param>
129. /// <param name="e"></param>
130. private void pass_cb_style_SelectedIndexChanged(object
131. {
132. algrorithmName = pass_cb_style.Text;
133. }
134. /// <summary>
135. /// 设置密码强度
136. /// </summary>
137. /// <param name="sender"></param>
138. /// <param name="e"></param>
139. private void pass_tb_first_KeyUp(object
140. {
141. }
142.
143. private void pass_tb_second_Leave(object
144. {
145. if
146. {
147. "两次输入的密码不一致", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
148. "";
149. }
150. }
151.
152. private void pass_tb_second_KeyUp(object
153. {
154. if
155. {
156. true;
157. true;
158. }
159. else
160. {
161. false;
162. false;
163. }
164. }
165. /// <summary>
166. /// 得到密码
167. /// </summary>
168. /// <returns></returns>
169. private string
170. {
171. string
172. int[] LegalLength = new int[4];
173. LegalLength = CryptoHelper.GetKeyLength(algrorithmName);
174. int
175. switch
176. {
177. case "DES":
178. {
179. if
180. passWord = pass_tb_first.Text;
181. if
182. passWord = pass_tb_first.Text.Substring(0, 8);
183. if
184. passWord = RepeatStr(pass_tb_first.Text, 8);
185. break;
186. }
187. case "RC2":
188. {
189. if
190. passWord = pass_tb_first.Text;
191. if
192. passWord = pass_tb_first.Text.Substring(0, 16);
193. if
194. passWord = RepeatStr(pass_tb_first.Text, 5);
195. break;
196. }
197. case "TripleDES":
198. {
199. if
200. {
201. passWord = pass_tb_first.Text;
202. if
203. {
204. passWord += passWord.Substring(0, 1);
205. plength = passWord.Length;
206. }
207. }
208. if
209. passWord = pass_tb_first.Text.Substring(0, 24);
210. if
211. passWord = RepeatStr(pass_tb_first.Text, 16);
212. break;
213. }
214. case "Rijndael":
215. {
216. passWord = pass_tb_first.Text;
217. if
218. passWord = RepeatStr(passWord, 16);
219. if
220. passWord = RepeatStr(passWord, 24);
221. if
222. passWord = RepeatStr(passWord, 32);
223. break;
224. }
225.
226. }
227. return
228. }
229. /// <summary>
230. /// 得到加密的块
231. /// </summary>
232. /// <returns>符合要求的块</returns>
233. private string
234. {
235. string
236. int
237. switch
238. {
239. case "Rijndael":
240. {
241. if
242. iv = RepeatStr(pass_tb_first.Text, 16);
243. else
244. iv = pass_tb_first.Text.Substring(0, 16);
245. break;
246. }
247. default:
248. {
249. if
250. iv = RepeatStr(pass_tb_first.Text, 8);
251. else
252. iv = pass_tb_first.Text.Substring(0, 8);
253. break;
254. }
255. }
256. return
257.
258. }
259. /// <summary>
260. /// 重复字符串到指定的长度
261. /// </summary>
262. /// <param name="str">字符串</param>
263. /// <param name="length">指定长度</param>
264. /// <returns>符合要求字符串</returns>
265. private string RepeatStr(string str, int
266. {
267. int
268. string
269. int
270. if
271. return
272. while
273. {
274. if
275. {
276. str += str.Substring(0, length - len);
277. len += length - len;
278. }
279. else
280. {
281. str += temp;
282. len += lenold;
283. }
284. }
285. return
286. }
287.
288. private void timer1_Tick(object
289. {
290. // 一、密码长度:
291. //5 分: 小于等于 4 个字符
292. //10 分: 5 到 7 字符
293. //25 分: 大于等于 8 个字符
294. //二、字母:
295. //0 分: 没有字母
296. //10 分: 全都是小（大）写字母
297. //20 分: 大小写混合字母
298. //三、数字:
299. //0 分: 没有数字
300. //10 分: 1 个数字
301. //20 分: 大于等于 3 个数字
302. //四、符号:
303. //0 分: 没有符号
304. //10 分: 1 个符号
305. //25 分: 大于 1 个符号
306. //五、奖励:
307. //2 分: 字母和数字
308. //3 分: 字母、数字和符号
309. //5 分: 大小写字母、数字和符号
310. //最后的评分标准:
311. //>= 90: 非常安全
312. //>= 80: 安全（Secure）
313. //>= 70: 非常强
314. //>= 60: 强（Strong）
315. //>= 50: 一般（Average）
316. //>= 25: 弱（Weak）
317. //>= 0: 非常弱
318. userPassScore = 0;
319. userPassLen = 0;
320. userPassLen=pass_tb_first.Text.Length;
321. lowerChar = 0;
322. upperChar = 0;
323. numChar = 0;
324. otherChar = 0;
325. foreach (char c in
326. {
327. if
328. {
329. lowerChar++;
330. }
331. if
332. {
333. upperChar++;
334. }
335. if
336. {
337. numChar++;
338. }
339. if
340. {
341. otherChar++;
342. }
343. }
344. //长度
345. if
346. userPassScore = 5;
347. if
348. userPassScore = 10;
349. if
350. userPassScore = 25;
351. if
352. {
353. userPassScore += 10;
354. }
355. if
356. {
357. userPassScore += 20;
358. }
359. if
360. {
361. userPassScore += 10;
362. if
363. userPassScore += 20;
364. }
365. if
366. {
367. userPassScore += 10;
368. if
369. userPassScore += 25;
370. }
371. if
372. {
373. userPassScore += 5;
374. }
375. if(userPassScore<25)
376. "非常弱";
377. if
378. {
379. "弱";
380. label5.ForeColor = System.Drawing.Color.Red;
381. }
382. if
383. {
384. "一般";
385. label5.ForeColor = System.Drawing.Color.Blue;
386. }
387. if
388. {
389. "强";
390. label5.ForeColor = System.Drawing.Color.YellowGreen;
391. }
392. if
393. {
394. "非常强";
395. label5.ForeColor = System.Drawing.Color.LightGreen;
396. }
397. if
398. {
399. "安全";
400. label5.ForeColor = System.Drawing.Color.GreenYellow;
401. }
402. if
403. {
404. "非常安全";
405. label5.ForeColor = System.Drawing.Color.Green;
406. }
407. }
408.
409. private void pass_tb_first_Enter(object
410. {
411. true;
412. }
413.
414. private void pass_tb_first_Leave(object
415. {
416. false;
417. }
418.
419. }
420. }
最后的一点补充说明
加密算法名称 | 密钥位数（KEY） | 初始化向量（IV） |
DES | 64位 | 64位 |
RC2 | 40位到128位，位数递增8 | 64位 |
Rijndael | 128，192，256 | 128--256 每次递增64位 |
TripleDES | 128位到192位 | 64位 |