Digest Authentication IS 9.9

Is any one aware how to use Digest Authentication in IS.
I am trying to call get method from REST API but it is unauthorized with status :401
And moreover I have used below header.

Digest username=“User’’, realm=“asd.asc”, nonce=“MTAvMDEvMjAxOSAxMjo0Mjo1Mw”, uri=”/dir/index.html",opaque=“0000000000000000”, stale=false, algorithm=MD5, qop=“auth”