;;; 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*)
(deny dynamic-code-generation)

(deny mach-priv-host-port)

(define (home-regex home-relative-regex)
    (regex (string-append "^" (regex-quote (param "HOME")) home-relative-regex)))

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

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

(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)

;; Preference domain
(allow user-preference-read user-preference-write
		(preference-domain "com.apple.audio.AudioConverterService")
)

(allow user-preference-read
		(preference-domain "kCFPreferencesAnyApplication")
		(preference-domain "com.apple.coreaudio")
)

;; Reading preferences in direct mode
(allow file-read*
	(home-literal "/Library/Preferences/.GlobalPreferences.plist")
	(home-literal "/Library/Preferences/.GlobalPreferences_m.plist")
	(home-regex #"/Library/Preferences/ByHost/\.GlobalPreferences\.[^/]*\.plist$")
	(home-literal "/Library/Preferences/com.apple.coreaudio.plist")
	(home-literal "/Library/Preferences/com.apple.coremedia.plist")
)

;; Connecting to AudioComponentRegistrar to find codecs
(allow mach-lookup
	(global-name "com.apple.audio.AudioComponentRegistrar")
	(global-name "com.apple.lskdd")
	(global-name "com.apple.fairplayd.versioned")
)
	
;; Using IOSurface for unilateral memory responsibility
;; Communicate with IOAudioCodecs for decrypting audio
(allow iokit-open-user-client
       (iokit-user-client-class "IOSurfaceRootUserClient")
       (iokit-user-client-class "IOAudioCodecsUserClient")
)

(allow iokit-open-service
       (iokit-registry-entry-class "IOAudioCodecs")
)
       
(allow file-map-executable
	(subpath "/System/Library/Components/AudioCodecs.component/")
	(subpath "/System/Library/Components/AudioDSP.component/")
)