Re: Where is the user impersonation token stored?
From: Gery D. Dorazio (gdorazio_at_enque.net)
Date: 10/11/05
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Date: Mon, 10 Oct 2005 20:38:39 -0400
Hi Dominick,
Do you know what the header is that contains the authentication information
as I think that is what I am looking for? The ISAPI authorization filter I
am looking at calls the ServerSupportFuntion with the HSE_REQ_EXEC_URL
request with another parameter that contains the impersonation token...The
docs don't say what header(s) get set that contain this information.
The ISAPI authentication filter (CustomAuth from IIS 6 resource kit) is for
using a web page to do Windows authentication so that the IE dialog is no
longer used.
Thanks,
Gery
-- Gery D. Dorazio Development Engineer EnQue Corporation www.EnQue.com www.ImagingHardware.com "Dominick Baier [DevelopMentor]" <dbaier@pleasepleasenospamdevelop.com> wrote in message news:425654601063cc8c79c1f74e7fcdd@news.microsoft.com... > Hello Gery, > > first of all the browser never tries to authenticate if he doesn't need > to - when you hit a page where you don't have anonymous access - IIS > bounces back a 401 to the client along with the possible authentication > methods. > > From that point on the browser sends the authentication information as a > header to the server on each request. > > download www.fiddlertool.com and try the different authentication settings > in IIS - you can see the headers flowing back and forth. A good testpage > to test the various settings can be found here: > http://www.leastprivilege.com/UpdatedShowContextsAndRequestLogonUserIdentity.aspx > > --------------------------------------- > Dominick Baier - DevelopMentor > http://www.leastprivilege.com > >> Hi Dominick, >> >> Thanks for the feedback. Can you explain a little more with respect to >> IIS? >> >> Here is the scenareo that has me stumped and really the reason for the >> post: >> >> 1) User requests a restricted page and the Windows popup dialog >> appears so >> the user logs in and is authenticated. Then the page is served up. >> 2) The user then clicks on another secured page link and is directed >> to that >> page...no popup since he is already authenticated. >> Here is a question that may hit the core of the problem: >> >> How does IIS handle authenticated Windows accounts during >> client-server requests to a web server? >> >> Here is my thinking as to what happens and the source of my confusion: >> >> When an HTTP request is finished and the response is sent back to the >> client the worker thread is finished and recycled...at least that's >> how I understand it. Along with this understanding the server then >> would have no knowledge whether the user is logged in....eg http is >> stateless. Then for subsequent requests IIS would have to log them in >> automatically for each request since they already logged in once. But >> what happens on the next request? Where does IIS (or some ISAPI >> authentication filter/extension) get the information to re-logon the >> user? Translated....where is this: ctx.WorkerRequest.GetUserToken() >> getting its user token from?...is it stored in a header, an encrypted >> cookie passed back and forth between client and server?...all this is >> only in regards to Windows authentication and not ASP.NET forms >> authentication since I know that is encrypted in a forms cookie... >> >> Thanks and hope this is clear, >> >> Thanks, >> Gery >> EnQue Corporation >> www.EnQue.com >> www.ImagingHardware.com >> "Dominick Baier [DevelopMentor]" >> <dbaier@pleasepleasenospamdevelop.com> wrote in message >> news:42565460104b138c79b9ca7e77d13@news.microsoft.com... >> >>> Hello Gery, >>> >>> 1) The outcome os IIS authentication is stored in a blob called ISAP >>> Extension Control Block - the ASPNET_ISAPI extension passes the token >>> to ASP.NET (via WorkerRequest). This token is availabe in ASP.NET 2.0 >>> using the Request.LogonUserIdentity >>> >>> 2) There is some caching involved in IIS - but ASP.NET grabs the >>> impersonation token on each request from IIS to populate >>> Context.User. >>> >>> HTH >>> --------------------------------------- >>> Dominick Baier - DevelopMentor >>> http://www.leastprivilege.com >>>> When a user visits a web site and is authenticated through the popup >>>> dialog box (Windows authentication) he enters his username and >>>> password. Evidently this creates the users impersonation token that >>>> is used on subsequent requests to secured web pages. On subsequent >>>> requests the WindowsAuthenticationModule is what authenticates on >>>> each request. The code that does this looks like this: >>>> >>>> WindowsIdentity wi = new >>>> WindowsIdentity(ctx.WorkerRequest.GetUserToken(), >>>> text2, WindowsAccountType.Normal, true); >>>> Context.User = new WindowsPrincipal(wi); >>>> The questions are: >>>> 1. Where did the initial Windows authentication put the user >>>> impersonation >>>> token? >>>> 2. Where is the user impersonation token stored as the user makes >>>> web >>>> page >>>> requests(or is it generated on each request and if so how?)? >>>> Thanks, >>>> Gery >>>> EnQue Corporation >>>> www.EnQue.com >>>> www.ImagingHardware.com > >
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