Re: Single sign on with AD

[Arif]

If you are running as a CGI script within an Apache web server then you can look for the environment variable REMOTE_USER (ie. $ENV{REMOTE_USER}). If it is set then that's the user name as authenticated with Apache. With that you can use LDAP modules to extract extra information about the user from the AD.

To enable user authentication within Apache you could use mod_auth_kerb to allow Kerberos tickets or passwords to authenticate a user

AuthType  Kerberos
AuthName "Kerberos Login"
SSLRequireSSL
KrbAuthRealms DOMAIN
KrbServiceName http
Krb5Keytab /etc/krb5.keytab
KrbMethodNegotiate on
KrbMethodK5Passwd on
require valid-user

It's a little tricky to get right and your server needs to be joined to the AD domain, but it works wonderfully. I assume that mod_auth_sspi works similarly.

[newbie200]

I used mod_auth_sspi and was able to see my REMOTE_USER via a script i wrote to check it. What I still don't understand is how do i use Ldap to extract this information about the user from the AD and have it working on my web app.

[Anonymous Monk]

... and be very sure that your software is actually looking at the right thing. I have literally been able to white-hat an internal website by adding &REMOTE_USER=admin to the URL-string, because the (old, PHP) program – or its non-tester – was not paying attention.