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.