;;; Copyright © 2023 Apple Inc.  All Rights reserved.
;;;
;;; WARNING: The sandbox rules in this file currently constitute
;;; Apple System Private Interface and are subject to change at any time and
;;; without notice.
;;;
(version 1)

;;;;;;
;;; Restrictions
;;;;;;

(deny default)
(deny file-map-executable iokit-get-properties process-info* nvram*)
(deny dynamic-code-generation)

;;;;;;
;;; Imports
;;;;;;

(import "system.sb")
(import "com.apple.corefoundation.sb")
(corefoundation)

;;;;;;
;;; Defines
;;;;;;


;; Homedir-relative path filters
(define (home-regex home-relative-regex)
    (regex (string-append "^" (regex-quote (param "HOME")) home-relative-regex)))

(define (home-subpath home-relative-subpath)
    (subpath (string-append (param "HOME") home-relative-subpath)))

(define (home-prefix home-relative-prefix)
    (prefix (string-append (param "HOME") home-relative-prefix)))

(define (home-literal home-relative-literal)
    (literal (string-append (param "HOME") home-relative-literal)))

(define (user-subpath user-relative-subpath)
    (subpath (string-append (param "DARWIN_USER_DIR") user-relative-subpath)))

;;;;;;
;;; Permissions
;;;;;;

;; Allow introspecting our own process info.
(allow process-info* (target self))

;; Allow resolving symlinks, realpath(3), and equivalents.
(allow file-read-metadata)

;; Allow validating the entitlements of clients.
(allow process-info-codesignature)

;; Allow read/write access to our own preferences.
(allow user-preference-read user-preference-write
       (preference-domain "com.apple.ManagedSettingsAgent"))

;; Allow read-only access to any application preferences
(allow user-preference-read
       (preference-domain "kCFPreferencesAnyApplication"))

;; Allow read data access to our launch path.
(allow file-read-data
       (literal "/usr/libexec")
       (literal "/usr/libexec/ManagedSettingsAgent"))
       
;; Allow read/write access to our temporary directories
(allow file-read* file-write*
       (subpath (param "DARWIN_CACHE_DIR"))
       (subpath (param "DARWIN_USER_DIR"))
       (subpath (param "TMPDIR")))

;; Read/write cache access
(let ((cache-path-filter (home-subpath "/Library/Caches/com.apple.ManagedSettingsAgent")))
  (allow file-read* file-write* cache-path-filter)
  (allow file-issue-extension
    (require-all
      (extension-class "com.apple.app-sandbox.read" "com.apple.app-sandbox.read-write")
      cache-path-filter)))

;; Allow read/write access to Screen Time data vault
(let ((screen-time-data-vault-path-filter (user-subpath "/com.apple.ScreenTimeAgent/Store")))
  (allow file-read* file-write* screen-time-data-vault-path-filter)
  (allow file-issue-extension
    (require-all
      (extension-class "com.apple.app-sandbox.read" "com.apple.app-sandbox.read-write")
      screen-time-data-vault-path-filter)))

;; Mach lookup access
(allow mach-lookup
       (global-name "com.apple.duetactivityscheduler")
       (global-name "com.apple.lsd.mapdb")
       (global-name "com.apple.lsd.modifydb")
       (global-name "com.apple.pluginkit.pkd"))