1 using System;
2 using System.Security.Cryptography;
3 using System.Text;
4
5 namespace ManageSystem.Core {
6 public static class CryptographyHelper {
7 /// <summary>
8 /// MD5加密字符串 WEB
9 /// </summary>
10 /// <param name="source">源字符串</param>
11 /// <returns>加密后的字符串</returns>
12 public string MD5(string source) {
13 return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5"); ;
14 }
15 /// <summary>
16 /// MD5 32位加密
17 /// </summary>
18 public static string MD5Encrypt32(string strCode) {
19 MD5 md5 = new MD5CryptoServiceProvider();
20 byte[] t = md5.ComputeHash(Encoding.UTF8.GetBytes(strCode));
21 StringBuilder sb = new StringBuilder(32);
22 for (int i = 0; i < t.Length; i++) {
23 sb.Append(t[i].ToString("x").PadLeft(2, '0'));
24 }
25 return sb.ToString();
26 }
27 /// <summary>
28 /// MD5 16位加密
29 /// </summary>
30 public static string MD5Encrypt16(string strCode) {
31 MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
32 string t2 = BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(strCode)), 4, 8);
33 t2 = t2.Replace("-", "");
34 return t2;
35 }
36
37 // Methods
38 public static string TripleDESDecrypt(string cipherString, string key, bool useHashing) {
39 byte[] buffer;
40 byte[] inputBuffer = Convert.FromBase64String(cipherString);
41 //string key = "johnny depp";
42 if (useHashing) {
43 MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider();
44 buffer = provider.ComputeHash(Encoding.UTF8.GetBytes(key));
45 provider.Clear();
46 }
47 else {
48 buffer = Encoding.UTF8.GetBytes(key);
49 }
50 TripleDESCryptoServiceProvider tripleDesProvider = new TripleDESCryptoServiceProvider();
51 tripleDesProvider.Key = buffer;
52 tripleDesProvider.Mode = CipherMode.ECB;
53 tripleDesProvider.Padding = PaddingMode.PKCS7;
54 byte[] bytes = tripleDesProvider.CreateDecryptor().TransformFinalBlock(inputBuffer, 0, inputBuffer.Length);
55 tripleDesProvider.Clear();
56 return Encoding.UTF8.GetString(bytes);
57 }
58
59 public static string TripleDESEncrypt(string toEncrypt, string key, bool useHashing) {
60 byte[] buffer;
61 byte[] bytes = Encoding.UTF8.GetBytes(toEncrypt);
62 //string key = "johnny depp";
63 if (useHashing) {
64 MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider();
65 buffer = provider.ComputeHash(Encoding.UTF8.GetBytes(key));
66 provider.Clear();
67 }
68 else {
69 buffer = Encoding.UTF8.GetBytes(key);
70 }
71 TripleDESCryptoServiceProvider tripleDesProvider = new TripleDESCryptoServiceProvider();
72 tripleDesProvider.Key = buffer;
73 tripleDesProvider.Mode = CipherMode.ECB;
74 tripleDesProvider.Padding = PaddingMode.PKCS7;
75 byte[] inArray = tripleDesProvider.CreateEncryptor().TransformFinalBlock(bytes, 0, bytes.Length);
76 tripleDesProvider.Clear();
77 return Convert.ToBase64String(inArray, 0, inArray.Length);
78 }
79 }
80 }
