;;; Copyright (c) 2017 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)

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

(deny mach-priv-host-port)

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

;;; 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)))


(allow process-info* (target self))

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

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

;; Your preference domain
(allow user-preference-read user-preference-write
       (preference-domain "com.apple.audio.SandboxHelper")
       (preference-domain "kCFPreferencesAnyApplication")
)

;; Read/write access to a temporary directory.
(allow file-read* file-write*
		(subpath (param "TMPDIR"))
		(subpath (param "DARWIN_CACHE_DIR"))
		(subpath "/private/var/db")
		(subpath "/var/db")
)

;; Read/write cache access
(let ((cache-path-filter (home-subpath "/Library/Caches/com.apple.audio.SandboxHelper")))
  (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)))

;; Debugging

(when (param "DYLD_FRAMEWORK_PATH")
	(for-each
		(lambda (path)
			(allow file-read-data (regex (string-append path #".*"))))
		(split-string (param "DYLD_FRAMEWORK_PATH") ":")))

(when (param "DYLD_FRAMEWORK_PATH")
	(allow file-read*
		(regex #".*")))

;; Actual violations we found while running SandboxHelper

(define (home path)
	(string-append (param "HOME") path))

(define (home-path-ancestors home-relative-path)
	(path-ancestors (string-append (param "HOME") home-relative-path)))

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

(allow file-read*
	(home-subpath "/Library/Audio/Plug-Ins/Components")
	(home-path-ancestors "/Library/Audio/Plug-Ins/Components")
	(subpath "/Library/Audio/Plug-Ins/Components")
	(path-ancestors "/Library/Audio/Plug-Ins/Components")
	(subpath "/AppleInternal/Library/Audio/Plug-Ins/Components")
	(path-ancestors "/AppleInternal/Library/Audio/Plug-Ins/Components")
	(subpath (param "TMPDIR"))
	(subpath (param "DARWIN_CACHE_DIR"))
	(extension "com.apple.app-sandbox.read")
)

(allow process-info-pidinfo)