IAS WPS Extension DLL With EAP-TLV URI AVP Using Guest Authentication

I am trying to write an extension DLL for IAS that does the WPS guest
authentication. I have it successfully registering itself, grabbing packets,
testing cases, selectively converting Access-Reject packets to Access-Accept
packets, etc. The only part I cannot figure out is how and when to do the
EAP-TLV URI attribute-value pairs. I imagine I do them in an
Access-Challenge packet, but I do not know how to figure out WHICH packet to
put them in or HOW to put them in the packet. I cannot find any USEFULL
documentation on doing the EAP programming stuff in an IAS DLL. I also do
not understand how my EAP messages get encrypted along with the rest, or how
I can modify them inside a call to the RadiusExtensionProcess2 function. Any
help or examples on how to do this would be greatly appreciated.

Thanks.

Eliot Gable
CCNA, CWNA, CWSP,
Security+, Network+




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