Extract SID from IWA response

[Kevin Dorle]

It appears in .NET 2.0 there is a property of the
System.Security.Principal.WindowsIdentity class called User that returns a
string representation of a user's SID after they have authenticated using
IWA. My question, is a similar property in .NET 1.1 from another class that
will return the same information? I know there are several properties that
return a domain/username string but to get the SID requires an DS lookup
function which is performed across the wire. The application we are
developing resides on a web server in a domain that has several dozen trust
relationships to "account" domains across WAN links with varying speeds. To
maximize performance, the user property appears to work without going over
the wire. I am assuming it is getting this from the Kerberos authenticator
that is passed during the IWA handshake.

Thanks,
Kevin

 

[Joe Kaplan \(MVP - ADSI\)]

The way to do this in .NET 1.1 would be to do a p/invoke on the
GetTokenInformation API using the Token property of the WindowsIdentity
class as the main input. You don't need to do a DS call to get the SID when
you have the token.

There are some nice wrapper classes out there that support this such as the
one on GotDotNet Win32 Security Library or DataMarvel.

Joe K.