Html Browser: best practice to pass user SID to server-side

Legacy application (win32 clients + centralized db) has 40+ ins开发者_StackOverflow社区tallations in a company & lacks the ability to be extended by plugins. Legacy authentication system relies on computer name, user name & user SID (there is no single DOMAIN server in a company, there are dozens of workgroups).

I'm going to build stand-alone intranet site that would provide additional functions to legacy ones. I want to use current authentication data - this way I have to pass SID from html browser somehow without prompting user to enter login/password e.t.c.

Does UserSID/WorkstationName/UserName are sendable via HTTP(s) protocol after being configured some way? If no what technologies would you suggest to use: May be I shall use Silverlight + WMI abilities or may be it's possible to access WMI from javascript (so I should consider traditional ajax).

Another question: what is the best practice to send UserName,WorkStationName,SID in terms of security. Shall I pass it as function params from client to server, or may be I shall configure this params sendable via communication protocol (if I'm going to use WCF communication and it's configurable this way)?

Thank you in advance!

Did you try to set in IE User Authentication->Logon->Automatic logon with current user name and password ? In theory that should work: set this option and save user/pwd in stored accounts.

I have used such approach successfully.