Merge pull request 0bbedCode#15 from LuigiVampa92/drm_unique_id

Added a hook that prevents requesting of the unique DRM id

app/src/main/assets/hooks.json

@@ -2749,5 +2749,21 @@
     "enabled": false,
     "usage": false,
     "luaScript": "@webview_constructor"
+  },
+  {
+    "collection": "Privacy",
+    "group": "Use.Tracking",
+    "name": "MediaDrm.getPropertyByteArray",
+    "author": "LuigiVampa92",
+    "description": "DRM manager will return fake unique device ID",
+    "className": "android.media.MediaDrm",
+    "methodName": "getPropertyByteArray",
+    "parameterTypes": [
+      "java.lang.String"
+    ],
+    "returnType": "byte[]",
+    "minSdk": 18,
+    "enabled": true,
+    "luaScript": "@mediadrm_unique_id"
   }
 ]

app/src/main/assets/mediadrm_unique_id.lua

@@ -0,0 +1,35 @@
+-- This file is part of XPrivacyLua.
+
+-- XPrivacyLua is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+
+-- XPrivacyLua is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+
+-- You should have received a copy of the GNU General Public License
+-- along with XPrivacyLua.  If not, see <http://www.gnu.org/licenses/>.
+
+-- Copyright 2017-2019 Marcel Bokhorst (M66B)
+
+function after(hook, param)
+    local result = param:getResult()
+    if result == nil or result.length == 0 then
+        return false
+    end
+
+    local propertyString = param:getArgument(0)
+    if propertyString == nil or propertyString ~= 'deviceUniqueId' then
+        return false
+    end
+
+    local arrayClass = luajava.bindClass('java.lang.reflect.Array')
+    local byteClass = luajava.bindClass('java.lang.Byte')
+    local rawByteType = byteClass.TYPE
+    local fake = arrayClass:newInstance(rawByteType, result.length)
+    param:setResult(fake)
+    return true
+end