;;; Copyright (c) 2026 Apple Inc.  All Rights reserved.
;;;
;;; Apple System Private Interface and are subject to change at any time and
;;; without notice.
;;;
;;; https://confluence.sd.apple.com/display/OSSEC/How+To+Sandbox+a+Daemon+on+macOS
;;;

(version 1)

;;;; Tracing mode: log violations without enforcing.
;;;; Per https://confluence.sd.apple.com/spaces/OSSEC/pages/83698385/How+To+Sandbox+a+Daemon+on+macOS
;;;; exercise the daemon, run:
;;;;   sbutil log show | grep appleaccounttransparencyd
;;;; then add required allow rules and switch these 3 lines to (deny ...) when done.
(allow (with report) default)
(allow (with report) file-map-executable iokit-get-properties process-info* nvram*)
(allow (with report) dynamic-code-generation)

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

;;; Homedir-relative path filters
(define (home-subpath home-relative-subpath)
    (subpath (string-append (param "HOME") home-relative-subpath))
)

(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)

;;;;
;;;; Security.framework
;;;;

(allow ipc-posix-shm-read-data ipc-posix-shm-write-create ipc-posix-shm-write-data
    (ipc-posix-name "com.apple.AppleDatabaseChanged")
)

(allow file-read* file-write*
    (subpath "/private/var/db/mds/system")
)

(allow file-read*
    (subpath (param "SECURITY_MESSAGES_DIR"))
)

;;;;
;;;; Preferences
;;;;

(allow user-preference-read user-preference-write
    (preference-domain "com.apple.appleaccounttransparencyd")
)

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

;;;;
;;;; Filesystem
;;;;

(allow file-read* file-write*
    (literal "/Library/Preferences/com.apple.security.plist")
    (home-subpath "/Library/Keychains")
    (subpath (param "DARWIN_CACHE_DIR"))
    (subpath (param "DARWIN_USER_DIR"))
    (subpath (param "TMPDIR"))
)

;;;;
;;;; Container Manager Support
;;;;

;; Allow container manager sandbox extensions for daemon containers
(allow file-read* file-write*
    (extension "com.apple.sandbox.container"))

;;;;
;;;; Mach services
;;;;

(allow mach-lookup
    (global-name "com.apple.ak.auth.xpc")
    (global-name "com.apple.ak.anisette.xpc")
    (global-name "com.apple.accountsd.accountmanager")
    (global-name "com.apple.containermanagerd")
    (global-name "com.apple.metadata.mds")
    (global-name "com.apple.securityd.xpc")
    (global-name "com.apple.securityd")
    (global-name "com.apple.SecurityServer")
    (global-name "com.apple.SystemConfiguration.configd")
    (global-name "com.apple.usymptomsd")
)

;;;;
;;;; IOKit
;;;;

(allow iokit-open
    (iokit-user-client-class "RootDomainUserClient")
    ;; Allow access to the key store
    (iokit-user-client-class "AppleKeyStoreUserClient")
)

;;;;
;;;; Network
;;;;

(allow network-outbound)
(allow network-outbound
    ;; to resolve host names
    (literal "/private/var/run/mDNSResponder")
)