How to implement a customized Security Support Provider to auth a user on a cloud?

[秀先 楊]

I want to provide an authentication mechanism on Windows for a user on a cloud.The credential provider mostly satisfies this requirement with the premise that the user is a local user, Microsoft account or a domain user of this PC. But I also would like to get escalated privilege as the user, even the user is only on a cloud, not a domain user or Microsoft account.As far as I know, Microsoft provide a mechanism, SSP(Security Support Provider), kerberos and NTLM implements it.There are few documents describing about SSP, such as The Windows Negotiation Extension and Writing NegoEx SSPs.Futhermo

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