对Url传输参数进行加密和解密

最近做一个论坛入口时要实现帐号和密码不在IE地址栏出现而做的

index.aspx.cs (加密处理)

1. Byte[]Iv64={11,22,33,44,55,66,77,85};
2. Byte[]byKey64={10,20,30,40,50,60,70,80};
3. publicstringEncrypt(stringstrText)
4. {
5. try
6. {
7. DESCryptoServiceProviderdes=newDESCryptoServiceProvider();
8. Byte[]inputByteArray=Encoding.UTF8.GetBytes(strText);
9. MemoryStreamms=newMemoryStream();
10. CryptoStreamcs=newCryptoStream(ms,des.CreateEncryptor(byKey64,Iv64),
    
11. CryptoStreamMode.Write);
12. cs.Write(inputByteArray,0,inputByteArray.Length);
13. cs.FlushFinalBlock();
14. returnConvert.ToBase64String(ms.ToArray());
15. }
16. catch(Exceptionex)
17. {
18. returnex.Message;
19. }
20. }
21. 
    
22. privatevoidbtnLogin_Click(objectsender,System.Web.UI.ImageClickEventArgse)
23. {
24. DateTimenowTime=DateTime.Now;
25. stringpostUser=txtUser.Text.ToString();
26. stringpostPass=txtPassword.Text.ToString();
27. Response.Redirect("Login.aspx?clubID="+Encrypt(postUser+","+postPass+",
28. "+nowTime.ToString()));
29. }

login.aspx.cs (解密处理)

1. //随机选8个字节既为密钥也为初始向量
3. Byte[]byKey64={10,20,30,40,50,60,70,80};
4. Byte[]Iv64={11,22,33,44,55,66,77,85};
6. publicstringDecrypt(stringstrText)
7. {
8. Byte[]inputByteArray=newbyte[strText.Length];
9. try
10. {
11. DESCryptoServiceProviderdes=newDESCryptoServiceProvider();
12. inputByteArray=Convert.FromBase64String(strText);
13. MemoryStreamms=newMemoryStream();
14. CryptoStreamcs=newCryptoStream(ms,des.CreateDecryptor(byKey64,Iv64),
15. CryptoStreamMode.Write);
16. cs.Write(inputByteArray,0,inputByteArray.Length);
17. cs.FlushFinalBlock();
18. System.Text.Encodingencoding=System.Text.Encoding.UTF8;
19. returnencoding.GetString(ms.ToArray());
20. }
21. catch(Exceptionex)
22. {
23. returnex.Message;
24. }
25. }
28. privatevoidPage_Load(objectsender,System.EventArgse)
29. {
30. if(Request.Params["clubID"]!=null)
31. {
32. stringoriginalValue=Request.Params["clubID"];
33. originalValue=originalValue.Replace("","+");
34. //+号通过url传递变成了空格。
35. stringdecryptResult=Decrypt(originalValue);
36. //DecryptString(string)解密字符串
37. stringdelimStr=",";
38. char[]delimiterArray=delimStr.ToCharArray();
39. string[]userInfoArray=null;
40. userInfoArray=decryptResult.Split(delimiterArray);
41. stringuserName=userInfoArray[0];
43. UseruserToLogin=newUser();
44. userToLogin.Username=userInfoArray[0];
45. userToLogin.Password=userInfoArray[1];
46. ......
47. }
48. }