说一说asp.net web.config 加密及解密方法 （代码）

1. ///<summary>
2. ///保护web.config的加密和解密
3. ///</summary>
4. publicclassPRotectHelper
5. {
6. ///<summary>
7. ///解密
8. ///</summary>
9. ///<paramname="pToDecrypt">加密连接字符串</param>
10. ///<paramname="sKey">自定义密钥</param>
11. ///<returns>解密字符串</returns>
12. publicstaticstringUnProtectSection(stringpToDecrypt,stringsKey)
13. {
14. byte[]inputByteArray=Convert.FromBase64String(pToDecrypt);
15. using(DESCryptoServiceProviderdes=newDESCryptoServiceProvider())
16. {
17. des.Key=ASCIIEncoding.ASCII.GetBytes(sKey);
18. des.IV=ASCIIEncoding.ASCII.GetBytes(sKey);
19. System.IO.MemoryStreamms=newSystem.IO.MemoryStream();
20. using(CryptoStreamcs=newCryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write))
21. {
22. cs.Write(inputByteArray,0,inputByteArray.Length);
23. cs.FlushFinalBlock();
24. cs.Close();
25. }
26. stringstr=Encoding.UTF8.GetString(ms.ToArray());
27. ms.Close();
28. returnstr;
29. }
30. }
32. ///<summary>
33. ///加密
34. ///</summary>
35. ///<paramname="pToEncrypt">连接字符串</param>
36. ///<paramname="sKey">自定义密钥</param>
37. ///<returns>加密字符串</returns>
38. publicstaticstringProtectSection(stringpToEncrypt,stringsKey)
39. {
40. using(DESCryptoServiceProviderdes=newDESCryptoServiceProvider())
41. {
42. byte[]inputByteArray=Encoding.UTF8.GetBytes(pToEncrypt);
43. des.Key=ASCIIEncoding.ASCII.GetBytes(sKey);
44. des.IV=ASCIIEncoding.ASCII.GetBytes(sKey);
45. System.IO.MemoryStreamms=newSystem.IO.MemoryStream();
46. using(CryptoStreamcs=newCryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write))
47. {
48. cs.Write(inputByteArray,0,inputByteArray.Length);
49. cs.FlushFinalBlock();
50. cs.Close();
51. }
52. stringstr=Convert.ToBase64String(ms.ToArray());
53. ms.Close();
54. returnstr;
55. }
56. }
57. }