RADIUS attribute from rfc5090


Digest-Method

This attribute holds the method value to be used in the HTTP
         Digest calculation.  This attribute MUST only be used in
         Access-Request and Accounting-Request packets.
   Type
         108 for Digest-Method
   Length
         >= 3
   Text
         In Access-Requests, the RADIUS client takes the value of the
         request method from the HTTP-style request it wants to
         authenticate.