How to get the identity claim encoding types of windows and forms authentication providers using API?

Question

Hi,
We have to get all the claims providers associated with a web application and its identity claim encoding type using API.
For example:
If the identity claim of windows authentication is user name and the user name is a string, then we should get
"i:0#.w".
If the identity claim of forms authentication is
email and the provider name is "fba" , then we should get "i:0!.f|fba|".
The below link shows us to get all claims providers associated with a web application, but how do we get the identity claim encoding type of each provider?
http://msdn.microsoft.com/en-us/library/gg650432(v=office.14).aspx#SP_WCP_Tip3
using (SPSite theSite = new SPSite("http://someContosoUrl"))
// Get the web application.
    SPWebApplication wa = theSite.WebApplication;
    // Get the zone for the site.
    SPUrlZone theZone = theSite.Zone;
    // Get the settings that are associated with the zone.
    SPIisSettings theSettings = wa.GetIisSettingsWithFallback(theZone);
    // Get the list of authentication providers that are associated with the zone.
    foreach (SPAuthenticationProvider prov in
        theSettings.ClaimsAuthenticationProviders)
    {   // Need to get the identity claims encoding type using the SPAuthenticationProvider
Is windows authentication's identity claim encoding type always i.0#.w or the identity claim is always the user name?
Thanks & Regards,
Kalai.

Answer 1

If the requirement is to be able to convert claim identities to windows identities that can be used with other LOB/legacy application that still relies on NTLM/Windows Auth, then I would recommend to explore C2WTS.
Here are some references:
http://msdn.microsoft.com/en-us/library/office/ee539739(v=office.14).aspx
http://blah.winsmarts.com/2013-11-Use_C2WTS_to_get_a_classic_windows_identity_from_a_claims_identity.aspx
http://henrymcclain.blogspot.in/2013/05/claims-to-windows-token-service-c2wts.html
http://blogs.msdn.com/b/rodneyviana/archive/2011/02/20/claims-to-windows-token-service-c2wts-may-not-start-automatically-when-you-reboot-your-server-don-t-blame-sharepoint-for-that.aspx
http://blogs.msdn.com/b/russmax/archive/2010/05/27/understanding-sharepoint-2010-claims-authentication.aspx
Thanks!
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