1 /// <summary>
2 /// MD5验证函数
3 /// </summary>
4 /// <param name="fileName">文件的路径</param>
5 /// <param name="blockletter">返回的MD5值是否为大写</param>
6 /// <returns></returns>
7 public static string GetMD5HashFromFile(string fileName,bool blockletter)
8 {
9 try
10 {
11 FileStream file = new FileStream(fileName, FileMode.Open);
12 System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
13 byte[] retVal = md5.ComputeHash(file);
14 file.Close();
15
16 StringBuilder sb = new StringBuilder();
17 for (int i = 0; i < retVal.Length; i++)
18 {
19 if (blockletter)
20 sb.Append(retVal[i].ToString("X2"));
21 else
22 sb.Append(retVal[i].ToString("x2"));
23 }
24 return sb.ToString();
25 }
26 catch (Exception ex)
27 {
28 return "文件读取错误";
29 }
30 }
31 /// <summary>
32 /// 计算SHA1值
33 /// </summary>
34 /// <param name="fileName">文件地址</param>
35 /// <param name="blockletter">是否输出大写</param>
36 /// <returns></returns>
37 public static string GetSHA1HashFromFile(string fileName, bool blockletter)
38 {
39 var tragetFile = new System.IO.FileStream(fileName, System.IO.FileMode.Open);
40 var sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
41 byte[] hashbytes = sha1.ComputeHash(tragetFile);
42 tragetFile.Close();
43
44 System.Text.StringBuilder sb = new System.Text.StringBuilder();
45 for (int i = 0; i < hashbytes.Length; i++)
46 {
47 if (blockletter) //判断输出大小写
48 sb.Append(hashbytes[i].ToString("X2"));
49 else
50 sb.Append(hashbytes[i].ToString("x2"));
51 }
52 return sb.ToString();
53 }
