Click here to Skip to main content
14,983,344 members
Articles / Web Development / IIS
Posted 8 Oct 2003


59 bookmarked

Web-based Active Directory Login

Rate me:
Please Sign up or sign in to vote.
4.79/5 (18 votes)
9 Oct 20032 min read
Web-based Active Directory Login

Image 1


Web-based Active Directory Login implements central sign-on system for web-based applications. It was developed to eliminate maintenance of user passwords in database, whether encrypted or not. A user running application from desktop enjoys liberty to access resources and/or services on the network which he has permission to do from Windows. On the other hand, web-based applications run in a security context entirely different from that of a desktop application. Same user while running application from browser will not have such liberty. This was the problem when I tried to login using my n/w user name and password maintained in Active Directory through web. Ultimately it was overcome by impersonating the web server anonymous user which in most cases is IUSR_machinename.

Using the code

Below is a brief description of how to use the code.

There are two class files

  1. LoginAdmin
  2. prjLogin

LoginAdmin is an ActiveX DLL type project and contains a standard module and a class module. The ImpersonateUser class has two methods which you will be using in your ASP code.

' create an object of ImpersonateUser class
 Set objLogon = Server.CreateObject("LoginAdmin.ImpersonateUser")
' any domain user who has rights to access active directory
 objLogon.Logon "user id", "password", "domain name"

 Set objLogon = Nothing

These are the methods of the class ImpersonateUser and their description:

Logon(strUser, strPassword, strDomain)This method should be called before sending request to active directory. The user should be a valid domain user with at least read permissions of active directory. You can keep this user in a database or hardcode it's userid and password in the ASP script.
LogOff()This method must be called after accessing info from Active Directory in order for IIS to revert security permissions of the particular file

prjLogin is also an ActiveX DLL type project and contains only a class module. It uses references to Active DS type library. The clsDomainLogin class has one method with three parameters user name, password and domain.

' create an object of clsDomainLogin class
 Set oUser = Server.CreateObject("prjLogin.clsDomainLogin")

' BindObject has three parameters userid, password and domain name
 iResult = oUser.BindObject(strUser, strPassword, strDomain)

Below is a method of the class clsDomainLogin and its description:

BindObject(strUser, strPassword, strDomain)This method should be called while authenticating from Active Directory. It returns 1 when successful and 0 when unsuccessful


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Faisal Haroon
Web Developer The Shams Group
Pakistan Pakistan
Faisal is Senior Team Lead at The Shams Group, Karachi. He has 10+ years of experience in the field of software/ web development and infrastructure management.
He has worked on various tools and platform which includes VB, ASP, ASP.NET, Javascript, COM/COM+, SQL Server, Informix, Active Directory, UNIX/Solaris, WSH, Windows NT/ 2000 servers, RADIUS, SMTP, POP, IMAP etc.
He likes to watch movies, hangs out with friends and loves to make new friends.

Comments and Discussions

QuestionError on Page Server object error 'ASP 0177 : 800401f3' Pin
Member 1259783426-Aug-16 0:06
MemberMember 1259783426-Aug-16 0:06 
QuestionNeed dll file Pin
Member 1037249531-Oct-13 21:48
MemberMember 1037249531-Oct-13 21:48 
Questionquery regarding active diretory Pin
ketan italiya28-Jul-13 19:59
Memberketan italiya28-Jul-13 19:59 
AnswerRe: query regarding active diretory Pin
Faisal Haroon1-Aug-13 14:00
MemberFaisal Haroon1-Aug-13 14:00 
GeneralRe: query regarding active diretory Pin
ketan italiya1-Aug-13 18:51
Memberketan italiya1-Aug-13 18:51 
GeneralMy vote of 5 Pin
ketan italiya28-Jul-13 19:28
Memberketan italiya28-Jul-13 19:28 
QuestionDoesn't actually check the username/password at all Pin
Kendo27-Feb-13 15:36
MemberKendo27-Feb-13 15:36 
QuestionCan you help me!!! Pin
Sawan19-Oct-11 4:48
MemberSawan19-Oct-11 4:48 
GeneralThank you VERY much !!! Pin
aurelian6514-Apr-11 0:56
Memberaurelian6514-Apr-11 0:56 
GeneralOnly look in certain Active Directory OU Pin
mmora571810-Sep-10 10:14
Membermmora571810-Sep-10 10:14 
QuestionWhy only 1 wrong password try locks out my Network ID? Pin
Red Valdez16-Jun-09 23:42
MemberRed Valdez16-Jun-09 23:42 
GeneralASPX Web-based Active Directory Login problem Pin
ra2ak8-May-09 0:35
Memberra2ak8-May-09 0:35 
GeneralRe: ASPX Web-based Active Directory Login problem Pin
Red Valdez16-Jun-09 23:40
MemberRed Valdez16-Jun-09 23:40 
GeneralLogin success / bad password, when using no un / pw or a correct un / pw Pin
graeme thompson23-Apr-09 2:37
Membergraeme thompson23-Apr-09 2:37 
GeneralRe: Login success / bad password, when using no un / pw or a correct un / pw Pin
aurelian6514-Apr-11 1:04
Memberaurelian6514-Apr-11 1:04 
dickpacific13-Feb-09 7:31
Memberdickpacific13-Feb-09 7:31 
GeneralWorks perfect in WINXP Web Server but won't work with WINDOWS 2003 64-bit machine Pin
Red Valdez15-Jul-08 3:19
MemberRed Valdez15-Jul-08 3:19 
GeneralRe: Works perfect in WINXP Web Server but won't work with WINDOWS 2003 64-bit machine Pin
Faisal Haroon29-Jul-08 6:32
MemberFaisal Haroon29-Jul-08 6:32 
GeneralRe: Works perfect in WINXP Web Server but won't work with WINDOWS 2003 64-bit machine Pin
Red Valdez17-Feb-09 23:00
MemberRed Valdez17-Feb-09 23:00 
QuestionHow to use functions in dynamic stored procedures Pin
sanjeev Kumar Gupta7-Aug-07 23:40
Membersanjeev Kumar Gupta7-Aug-07 23:40 
Generallogon failed to active directory with ASP Pin
fernandoariel25-Apr-07 9:01
Memberfernandoariel25-Apr-07 9:01 
GeneralRe: logon failed to active directory with ASP Pin
aurelian6514-Apr-11 1:06
Memberaurelian6514-Apr-11 1:06 
GeneralImpersonateUser in IIS6.0 Pin
Augusto Ortiz15-Mar-07 13:33
MemberAugusto Ortiz15-Mar-07 13:33 
GeneralNo changes and 529 errors Pin
Member 383349215-Feb-07 8:33
MemberMember 383349215-Feb-07 8:33 
QuestionVS 2005 ASP.NET error Pin
Peter Grigg4-Sep-06 19:26
MemberPeter Grigg4-Sep-06 19:26 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.