NT Authentication - CGI as valid NT domain account

emilford has asked for the wisdom of the Perl Monks concerning the following question:

I have been tasked to create a web-based account creation tool for one of our customers. I have been provided w/ a Win2k box with an IBM HTTPServer version of Apache and ActiveState Perl installed. My question pertains to user authentication. The CGI script will need to run external commands (Tivoli CLI - for the curious) to create the user account. The external commands require appropriate permissions themselves to be executed, based on who the command is being run as. I need to be able to do the following:

Authenticate the user as being a valid user in the NT domain
Run all subsquent commands as that authenticated user

I've looked around the monastery and found information on setuid, suidperl, etc., but that these won't work properly on a NT box. Does anyone have experience along these lines? Any help or guidance would be appreciated.

Comment on NT Authentication - CGI as valid NT domain account

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Re: NT Authentication - CGI as valid NT domain account by allyc (Scribe) on Aug 06, 2004 at 15:45 UTC
One way to achieve this is to use a Module for Apache, so each time Apache receives a request it will authenticate the user with the Domain and then make the user’s name available to your script in $ENV{REMOTE_USER} variable. There are 2 modules that I know of. One is for Apache 1 (mod_ntlm) and the other is for Apache 2 (mod_sspi). I have never used mod_ntlm, however use mod_sspi and Apache 2 in many cases with great success. I believe that there are also some perl modules that you can use under mod_perl but I have never used any of them. Hope this gives you some pointers. Alistair	[reply]
Re^2: NT Authentication - CGI as valid NT domain account by emilford (Friar) on Aug 12, 2004 at 14:30 UTC
We're running Apache 2, so I've found mod_sspi. A few more tweaks need to be made so everything is configured correctlyl, but I'm fairly confident this will work fine. My problem now is getting the CGI script to run as the logged in user. On an NT box, under which user will the script run? If it is not as the logged in user, how would I go about changing this? I've seen many options for Unix, but Windows is a different beast. Thanks for your suggestions.	[reply]
Re^2: NT Authentication - CGI as valid NT domain account by allyc (Scribe) on Aug 12, 2004 at 15:07 UTC
I have never needed to get the scripts executed as the logged on user. I tend to run apache with an account that has the correct permissions for what I require. If I need the scripts to access more resources, I then grant it to the account. You might be able to use SUSExec but I have never used it, and I believe that it can cause security issues. Alistair	[reply]
Re: NT Authentication - CGI as valid NT domain account by inman (Curate) on Aug 06, 2004 at 17:05 UTC
You may be better off under IIS as a web server since what you are describing is it's default authentication behaviour (Integrated Windows Authentication). You can create a script directory, set the NTFS permissions on the files so that only the selected Domain users can run the script (presumably an admin team). The script then runs using their account i.e. with their permissions.	[reply]


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