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POHow can I impersonate logged on user and get access to unc folders?
 

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  1. POHow can I impersonate logged on user and get access to unc folders?
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    <p>I'm having trouble impersonating logged on user and then access unc files. I have tried using this sample code:</p> <pre><code>using System.Security.Principal; ... // Obtain the authenticated user's Identity WindowsIdentity winId = (WindowsIdentity)HttpContext.Current.User.Identity; WindowsImpersonationContext ctx = null; try { // Start impersonating ctx = winId.Impersonate(); // Now impersonating // Access resources using the identity of the authenticated user } // Prevent exceptions from propagating catch{} finally { // Revert impersonation if (ctx != null) ctx.Undo(); } // Back to running under the default ASP.NET process identity </code></pre> <p>If I try to access a file locally where the comment says <em>Access resources using the identity of the authenticated user</em> it works exactly as it should. If I however try to do the same thing with a file on a file server somewhere using UNC like \\ServerName\Share\FileName.txt it doesn't matter that the impersonated account has enough rights. The application throws an exception saying that the ASP.NET account does not have enough rights.</p> <p>I have also tried to use unmanaged code to perform the impersonation and then it works! Local file or UNC, doesn't matter, works like a charm!</p> <p>The problem is that you have to provide password and since it is the logged on users rights I want to check I can't provide that.</p> <p>Does anyone know why the application behaves like this? Is it some configuration setting I need to set? </p>
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    1. USPär Fahlén
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    1. COso to prevent exceptions from propagating you don't even catch and log them!? cooool!
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      1. USDavide Piras
    2. COyou're impersonating the ASP.NET Account... not the current user account. what's your authetication mode and you have specficy the impersonate on web.config?
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      1. US2GDev
    3. CO@Davide: I think it's a sample code... Check here : http://stackoverflow.com/questions/4334665/steps-to-enable-double-hop-delegation-in-iis7-windows-2008 , and here http://stackoverflow.com/questions/983443/windowsidentity-winid-windowsidentityhttpcontext-current-user-identity-how-t and here is the source: http://msdn.microsoft.com/en-us/library/ms998351.aspx#paght000023_impersonatingbyusingwindowsidentity
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