說一說asp.net web.config 加密及解密方法 （代碼）

1. ///<summary>
2. ///保護web.config的加密和解密
3. ///</summary>
4. publicclass
5. ///<returns>加密字符串</returns>
6. publicstaticstringProtectSection(stringpToEncrypt,stringsKey)
7. {
8. using(DESCryptoServiceProviderdes=newDESCryptoServiceProvider())
9. {
10. byte[]inputByteArray=Encoding.UTF8.GetBytes(pToEncrypt);
11. des.Key=ASCIIEncoding.ASCII.GetBytes(sKey);
12. des.IV=ASCIIEncoding.ASCII.GetBytes(sKey);
13. System.IO.MemoryStreamms=newSystem.IO.MemoryStream();
14. using(CryptoStreamcs=newCryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write))
15. {
16. cs.Write(inputByteArray,0,inputByteArray.Length);
17. cs.FlushFinalBlock();
18. cs.Close();
19. }
20. stringstr=Convert.ToBase64String(ms.ToArray());
21. ms.Close();
22. returnstr;
23. }
24. }
25. }