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I need to detect authentication type being used by SharePoint 2013 and 2016. I need to distinguish between ASP.NET Forms (cookies) authentication and Windows (Basi/Digest/NTLM/Ketberos) authentication.

I see that it is possible to detect authentication mode on server side: Programmatically determine authentication mode. But our SharePoint add-in is a pure JavaScript and does not have any server-side code.

Is it possible to detect SharePoint authentication in JavaScript?

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IT Hit WebDAV
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2 Answers2

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I think that you should investigate the HTTP headers of your web page.

They can be read through javascript (see this link) and contain information regarding the authentication type in use.

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Datadecision team member
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  • WWW-Authenticate header and Set-Cookies header can give authentication info. However there is no access to these headers in JS without modifying server-side. – IT Hit WebDAV Jun 27 '16 at 19:01
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I'm assuming you're on a standard SharePoint page -- if so, you can use the _spPageContextInfo object's userId and userLoginName properties.

They come along for the ride when the page is rendered.

From my browser dev tools:

Check here

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Nikhil Ghuse
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  • I have examined _spPageContextInfo variable. I do not see anything that can tell me about authentication. Which particular property contains authentication type? – IT Hit WebDAV Jul 01 '16 at 16:43