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!

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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.