Serve: Add privacy_mode flag for get_license_challenge

pywidevine/remotecdm.py

@@ -167,7 +167,8 @@ class RemoteCdm(Cdm):
             url=f"{self.host}/{self.device_name}/get_license_challenge/{type_}",
             json={
                 "session_id": session_id.hex(),
-                "init_data": pssh.dumps()
+                "init_data": pssh.dumps(),
+                "privacy_mode": privacy_mode
             }
         ).json()
         if r["status"] != 200:

pywidevine/serve.py

@@ -194,6 +194,9 @@ async def get_license_challenge(request: web.Request) -> web.Response:
     # get session id
     session_id = bytes.fromhex(body["session_id"])
 
+    # get privacy mode flag
+    privacy_mode = body.get("privacy_mode", True)
+
     # get cdm
     cdm: Optional[Cdm] = request.app["cdms"].get((secret_key, device_name))
     if not cdm:
@@ -219,7 +222,7 @@ async def get_license_challenge(request: web.Request) -> web.Response:
             session_id=session_id,
             pssh=init_data,
             type_=license_type,
-            privacy_mode=True
+            privacy_mode=privacy_mode
         )
     except InvalidSession:
         return web.json_response({