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If I look at HttpContext.Current.User.Identity.Name I get values that map to what I see in the content database in UserInfo.tp_Login.

Since I have enabled both Windows Authentication and Forms Based Authentication (claims) in my SharePoint 2010 web application I see values like the following for UserInfo.tp_Login.

<netbios_domain>\<samAccountName> i:0#.w|<netbios_domain>\<samAccountName> i:0#.f|<provider_name>|<claimsUserId>

For example:

MYDOMAIN\john.doe i:0#.w|mydomain\john.doe i:0#.f|ldapmember|[email protected]

Is there a good guide as to what the valid formats are here? I need to parse this information unless there is something handy function that I can use. I checked SPUtility and SPUtility.GetAccountName didn't seem to help.

I'm pretty sure that the "w" in "i:0#.w" means Windows and the "f" in "i:0#.f" means Forms, but I'm wondering if there is an enumerated list of possibilities somewhere.

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  • The good news is that AD users apparently cannot have a "\" or a "|" in the account name, so I may just be able to use those as a delimiter. Commented Jun 8, 2011 at 2:33

2 Answers 2

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Check out http://blog.mastykarz.nl/programmatically-converting-login-name-claim/

Yes, there's a handy function

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  • Perfect. It doesn't quite explain all the pieces and parts, but it does provide code for parsing it. It will be interesting to see if it works with non-claims accounts (I suspect not). Commented Jun 8, 2011 at 12:21
  • I see that there is a SPClaimProviderManager.IsClaimsUser() method which should help. Commented Jun 8, 2011 at 14:11
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There is an explanation in the whitepaper "Implementing Claims-Based Authentication with SharePoint Server 2010". You can download it here.

On page 62, "Claims Encoding", you read:

w/m/r/t/p/s = Original Issuer Type -> w = windows, m = membership, r = role, t = trusted STS, p = personal card, s= local sts claim

The rest of the string is explained too.

Update: I just found a full description on technet.

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