01.private bool Login(string _UserName, string _Password)
02.{
03. byte[] CurrentIV = new byte[] { 51, 52, 53, 54, 55, 56, 57, 58 };
04. byte[] CurrentKey = { };
05. if
06. {
07. int i;
08. string AddString = _UserName.Substring(0, 1);
09. int TotalLoop = 8 - _UserName.Length;
10. string tmpKey = _UserName;
11. for (i = 1; i <= TotalLoop; i++)
12. {
13. tmpKey = tmpKey + AddString;
14. }
15. CurrentKey = Encoding.ASCII.GetBytes(tmpKey);
16. }
17. desCrypt = new DESCryptoServiceProvider();
18. desCrypt.IV = CurrentIV;
19. desCrypt.Key = CurrentKey;
20.
21. ms = new MemoryStream();
22. ms.Position = 0;
23. cs = new CryptoStream(ms, desCrypt.CreateEncryptor());
24. byte[] arrByte = Encoding.ASCII.GetBytes(CurrentKey);
25. cs.Write(arrByte, 0, arrByte.Length);
26. cs.FlushFinalBlock();
27. cs.Close();
28. PwdWithEncrypt = Convert.ToBase64String(ms.ToArray());
29.
30. var un = from u in db.UserNames
31. where (u.UserName1 == _UserName && u.Password == PwdWithEncrypt)
32. && u.IsNormal == "1" select u;
33. if (un.Count() > 0)
34. {
35. return true;
36. }
37. else
38. {
39. return false;
40. }
41.}
