Source/WebKit/WebAuthnProcess/mac/com.apple.WebKit.WebAuthnProcess.sb.in

; Copyright (C) 2010-2020 Apple Inc. All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; 1. Redistributions of source code must retain the above copyright
;    notice, this list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright
;    notice, this list of conditions and the following disclaimer in the
;    documentation and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
; THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
; BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
; THE POSSIBILITY OF SUCH DAMAGE.

(version 1)
(deny default (with partial-symbolication))
(deny nvram*)
(allow system-audit file-read-metadata)

(with-filter (require-not (uid 0))
    (deny system-privilege)
    ;; Silence spurious logging due to rdar://20117923 and rdar://72366475
    (deny system-privilege (privilege-id PRIV_GLOBAL_PROC_INFO) (with no-report)))

#include "Shared/Sandbox/preferences.sb"

;;;
;;; The following rules were originally contained in 'system.sb'. We are duplicating them here so we can
;;; remove unneeded sandbox extensions.
;;;

;;; Allow registration of per-pid services.
(allow mach-register (local-name-prefix ""))

;;; Allow read access to standard system paths.
(allow file-read*
    (require-all (file-mode #o0004)
    (require-any (subpath "/Library/Filesystems/NetFSPlugins")
    (subpath "/Library/Apple/System")
    (subpath "/Library/Preferences/Logging")      ; Logging Rethink
    (subpath "/System")
#if __MAC_OS_X_VERSION_MIN_REQUIRED < 110000
    (subpath "/private/var/db/dyld")
#endif
    (subpath "/private/var/db/timezone")
    (subpath "/usr/lib")
    (subpath "/usr/share"))))

;;; Allow reading internal profiles on development builds
(allow file-read*
    (require-all (file-mode #o0004)
    (subpath "/AppleInternal/Library/Preferences/Logging")
    (system-attribute apple-internal)))

;;; Allow mapping of system frameworks + dylibs
(allow file-map-executable
    (subpath "/Library/Apple/System/Library/Frameworks")
    (subpath "/Library/Apple/System/Library/PrivateFrameworks")
    (subpath "/System/Library/Frameworks")
    (subpath "/System/Library/PrivateFrameworks")
    (subpath "/usr/lib")
    (subpath "/usr/appleinternal/lib") ;; <rdar://problem/72317112>
)

(allow file-read-metadata
    (literal "/etc")
    (literal "/tmp")
    (literal "/var")
    (literal "/private/etc/localtime"))


;;; Allow access to standard special files.
(allow file-read*
    (literal "/dev/autofs_nowait")
    (literal "/dev/random")
    (literal "/dev/urandom")
    (literal "/private/etc/master.passwd")
    (literal "/private/etc/passwd"))

(allow file-read*
       file-write-data
    (literal "/dev/null")
    (literal "/dev/zero"))

(allow file-read*
       file-write-data
       file-ioctl
    (literal "/dev/dtracehelper"))

;;; Allow creation of core dumps.
(allow file-write-create
    (require-all (prefix "/cores/")
        (vnode-type REGULAR-FILE)))

;;; Allow IPC to standard system agents.
(allow ipc-posix-shm-read*
    (ipc-posix-name "apple.shm.notification_center")
    (ipc-posix-name-prefix "apple.cfprefs."))

;;;
;;; End rules originally copied from 'system.sb'
;;;

;;; process-info* defaults to allow; deny it and then allow operations we actually need.
(deny process-info*)
(allow process-info-dirtycontrol (target self))
(allow process-info-pidinfo)
(allow process-info-setcontrol (target self))
(allow process-codesigning-status*)

(deny sysctl*)
(allow sysctl-read
    (sysctl-name
        "hw.activecpu" ;; <rdar://problem/56795575>
        "hw.availcpu"
        "hw.byteorder"
        "hw.busfrequency"
        "hw.busfrequency_max"
        "hw.cacheconfig" ;; <rdar://problem/78213563>
        "hw.cachelinesize" ;; <rdar://problem/56795575>
        "hw.cachesize" ;; <rdar://problem/78213563>
        "hw.cpufrequency"
        "hw.cpufrequency_max"
        "hw.cpusubfamily"
        "hw.cputhreadtype"
        "hw.cputype"
        "hw.l1dcachesize" ;; <rdar://problem/56795575>
        "hw.l1icachesize" ;; <rdar://problem/56795575>
        "hw.l2cachesize" ;; <rdar://problem/56795575>
        "hw.l3cachesize" ;; <rdar://problem/56795575>
        "hw.logicalcpu" ;; <rdar://problem/56795575>
        "hw.logicalcpu_max" ;; <rdar://problem/56795575>
        "hw.machine"
        "hw.memsize"
        "hw.model"
        "hw.ncpu"
        "hw.nperflevels" ;; <rdar://problem/76783596>
        "hw.pagesize" ;; <rdar://problem/76783596>
        "hw.pagesize_compat" ;; <rdar://problem/76783596>
        "hw.physicalcpu" ;; <rdar://problem/58416475>
        "hw.physicalcpu_max" ;; <rdar://problem/58416475>
        "hw.tbfrequency"
        "hw.tbfrequency_compat"
        "hw.vectorunit"
        "kern.bootargs" ;; <rdar://problem/47738015>
        "kern.hostname"
        "kern.hv_vmm_present"
        "kern.maxfilesperproc"
        "kern.memorystatus_level"
        "kern.osproductversion" ;; <rdar://problem/51756739>
        "kern.osrelease"
        "kern.ostype"
        "kern.osvariant_status"
        "kern.osversion"
        "kern.safeboot"
        "kern.version"
        "machdep.cpu.brand_string"
        "security.mac.sandbox.sentinel"
        "kern.tcsm_enable"
        "kern.tcsm_available"
        "vm.footprint_suspend")
    (sysctl-name-prefix "net.routetable")
    (sysctl-name-prefix "hw.optional.") ;; <rdar://problem/71462790>
    (sysctl-name-prefix "hw.perflevel") ;; <rdar://problem/76783596>
)

(allow sysctl-write
    (sysctl-name
        "kern.tcsm_enable"))

(deny mach-lookup (xpc-service-name-prefix ""))
(allow mach-lookup
    (xpc-service-name "com.apple.PerformanceAnalysis.animationperfd")
    (xpc-service-name "com.apple.accessibility.mediaaccessibilityd")
    (xpc-service-name "com.apple.audio.SandboxHelper")
    (xpc-service-name "com.apple.coremedia.videodecoder")
    (xpc-service-name "com.apple.coremedia.videoencoder")
    (xpc-service-name "com.apple.hiservices-xpcservice")
)

;; Utility functions for home directory relative path filters
(define (home-regex home-relative-regex)
  (regex (string-append "^" (regex-quote (param "HOME_DIR")) home-relative-regex)))

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

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

(define (allow-read-directory-and-issue-read-extensions path)
    (if path
        (begin
            (allow file-read* (subpath path))
            (allow file-issue-extension (require-all (extension-class "com.apple.app-sandbox.read") (subpath path))))))

(define (allow-read-write-directory-and-issue-read-write-extensions path)
    (if path
        (begin
            (allow file-read* file-write* (subpath path))
            (allow file-issue-extension (require-all (extension-class "com.apple.app-sandbox.read") (subpath path)))
            (allow file-issue-extension (require-all (extension-class "com.apple.app-sandbox.read-write") (subpath path))))))

;; Remove when <rdar://problem/29646094> is fixed.
(define (HEX-pattern-match-generator pattern-descriptor)
    (letrec ((pattern-string ""))
        (for-each  (lambda (repeat-count)
            (if (zero? repeat-count)
                (set! pattern-string (string-append  pattern-string "-"))
                (let appender ((count repeat-count))
                    (if (> count 0)
                        (begin
                            (set! pattern-string (string-append  pattern-string "[0-9A-F]"))
                            (appender (- count 1)))))))
            pattern-descriptor)
    pattern-string))

;; return a regex pattern matching string for 8-4-4-4-12 UUIDs:
(define (uuid-HEX-pattern-match-string)
    (HEX-pattern-match-generator '(8 0 4 0 4 0 4 0 12)))

;; global to hold the computed UUID matching pattern.
(define *uuid-pattern* "")

(define (uuid-regex-string)
    (if (zero? (string-length *uuid-pattern*))
        (set! *uuid-pattern* (uuid-HEX-pattern-match-string)))
    *uuid-pattern*)

;; Read-only preferences and data
(allow file-read*
    ;; Basic system paths
    (subpath "/Library/Dictionaries")
    (subpath "/Library/Fonts")
    (subpath "/Library/Frameworks")
    (subpath "/Library/Managed Preferences")
    (subpath "/Library/Speech/Synthesizers")
    (regex #"^/private/etc/(hosts|group|passwd)$")

    ;; System and user preferences
    (home-literal "/.CFUserTextEncoding")

    ;; FIXME: This should be removed when <rdar://problem/8957845> is fixed.
    (home-subpath "/Library/Fonts")

    (subpath "/Library/Audio/Plug-Ins/HAL")

    (home-subpath "/Library/Dictionaries"))

(allow file-read-data
    (literal "/usr/local/lib/log") ; <rdar://problem/36629495>
    ;; Needed for AES3 support
    (subpath "/Library/Audio/Plug-Ins/Components"))

;; Preferences support
(shared-preferences-read
    "com.apple.Accessibility"
    "com.apple.ATS"
    "com.apple.CoreGraphics"
    "com.apple.DownloadAssessment"
    "com.apple.HIToolbox"
    "com.apple.LaunchServices"
    "com.apple.MultitouchSupport" ;; FIXME: Remove when <rdar://problem/13011633> is fixed.
    "com.apple.ServicesMenu.Services" ;; Needed for NSAttributedString <rdar://problem/10844321>
    "com.apple.ViewBridge" ;; Needed for Input elements.
    "com.apple.WebFoundation"
    "com.apple.avfoundation"
    "com.apple.avfoundation.frecents" ;; <rdar://problem/33137029>
    "com.apple.avfoundation.videoperformancehud" ;; <rdar://problem/31594568>
    "com.apple.coremedia"
    "com.apple.crypto"
    "com.apple.driver.AppleBluetoothMultitouch.mouse"
    "com.apple.driver.AppleBluetoothMultitouch.trackpad"
    "com.apple.driver.AppleHIDMouse"
    "com.apple.lookup.shared"
    "com.apple.mediaaccessibility" ;; Needed for custom caption styles
    "com.apple.networkConnect"
    "com.apple.speech.voice.prefs"
    "com.apple.systemsound"
    "com.apple.universalaccess"
    "edu.mit.Kerberos"
    "pbs") ;; Needed for NSAttributedString <rdar://problem/10844321>

(allow-reading-global-preferences)

; (Temporary) backward compatibility with non-CFPreferences readers.
(allow file-read*
    (literal "/Library/Preferences/com.apple.ViewBridge.plist"))

; FIXME: This is needed for some security framework calls (that use non-CFPreferences readers)
(allow file-read-data
    (literal "/Library/Preferences/com.apple.security.plist")
    (home-subpath "/Library/Preferences/com.apple.security.plist"))

;; On-disk WebKit2 framework location, to account for debug installations outside of /System/Library/Frameworks,
;; and to allow issuing extensions.
(allow-read-directory-and-issue-read-extensions (param "WEBKIT2_FRAMEWORK_DIR"))

;; Allow issuing extensions to system libraries that the Network process can already read.
;; This is to avoid warnings attempting to create extensions for these resources.
(allow-read-directory-and-issue-read-extensions "/System/Library/PrivateFrameworks/WebInspectorUI.framework")

;; Sandbox extensions
(define (apply-read-and-issue-extension op path-filter)
    (op file-read* path-filter)
    (op file-issue-extension (require-all (extension-class "com.apple.app-sandbox.read") path-filter)))
(define (apply-write-and-issue-extension op path-filter)
    (op file-write* path-filter)
    (op file-issue-extension (require-all (extension-class "com.apple.app-sandbox.read-write") path-filter)))
(define (read-only-and-issue-extensions path-filter)
    (apply-read-and-issue-extension allow path-filter))
(define (read-write-and-issue-extensions path-filter)
    (apply-read-and-issue-extension allow path-filter)
    (apply-write-and-issue-extension allow path-filter))
(read-only-and-issue-extensions (extension "com.apple.app-sandbox.read"))
(read-write-and-issue-extensions (extension "com.apple.app-sandbox.read-write"))
(allow mach-lookup (extension "com.apple.app-sandbox.mach")) ;; FIXME: Should be removed when <rdar://problem/13066206> is fixed.

(allow mach-lookup
#if PLATFORM(MAC)
    (with report) (with telemetry)
#endif
    (global-name "com.apple.audio.AudioComponentRegistrar")
    (global-name "com.apple.awdd")
#if !ENABLE(CFPREFS_DIRECT_MODE)
    (global-name "com.apple.cfprefsd.agent")
#endif
    (global-name "com.apple.cookied")
    (global-name "com.apple.diagnosticd")
    (global-name "com.apple.iconservices")
    (global-name "com.apple.iconservices.store")
    (global-name "com.apple.system.logger")
)

;; Various services required by AppKit and other frameworks
(allow mach-lookup
       (global-name "com.apple.PowerManagement.control")
       (global-name "com.apple.SystemConfiguration.configd")
       (global-name "com.apple.analyticsd")
       (global-name "com.apple.assertiond.processassertionconnection")
       (global-name "com.apple.audio.SystemSoundServer-OSX")
       (global-name "com.apple.audio.audiohald")
#if !ENABLE(CFPREFS_DIRECT_MODE)
       (global-name "com.apple.cfprefsd.daemon")
#endif
       (global-name "com.apple.coreservices.launchservicesd")
       (global-name "com.apple.fonts")
       (global-name "com.apple.mediaremoted.xpc")
       (global-name "com.apple.logd")
       (global-name "com.apple.logd.events")
       (global-name "com.apple.lsd.mapdb")
       (global-name "com.apple.lskdd") ;; <rdar://problem/49123855>
       (global-name "com.apple.tccd")
       (global-name "com.apple.tccd.system")
       (global-name "com.apple.trustd.agent")
       (global-name "com.apple.CARenderServer") ; Needed for [CAContext remoteContextWithOptions]
)

;; <rdar://problem/47268166>
(allow mach-lookup (xpc-service-name "com.apple.MTLCompilerService"))

(deny mach-lookup (with no-log)
    (global-name "com.apple.CoreServices.coreservicesd")
    (global-name "com.apple.DiskArbitration.diskarbitrationd")
    (global-name "com.apple.ViewBridgeAuxiliary")
    (global-name "com.apple.windowserver.active"))

;; Needed to support encrypted media playback <rdar://problem/40038478>
(allow mach-lookup
    (global-name "com.apple.SecurityServer")
    (global-name "com.apple.ocspd"))

(allow file-read* (subpath "/private/var/db/mds/system")) ;; FIXME: This should be removed when <rdar://problem/9538414> is fixed.
(with-filter (uid 0)
    (allow file-write*
        (subpath "/private/var/db/mds/system")) ;; FIXME: This should be removed when <rdar://problem/9538414> is fixed.
)

(allow file-read*
       (subpath "/private/var/db/mds")
       (literal "/private/var/db/DetachedSignatures"))

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

;; CoreFoundation. We don't import com.apple.corefoundation.sb, because it allows unnecessary access to pasteboard.
(allow mach-lookup
    (global-name-prefix "com.apple.distributed_notifications")
#if !HAVE(CSCHECKFIXDISABLE)
    (global-name "com.apple.CoreServices.coreservicesd")
#endif
)

(allow file-read-data
    (literal "/dev/autofs_nowait")) ; Used by CF to circumvent automount triggers
(allow ipc-posix-shm
    (ipc-posix-name-prefix "CFPBS:")) ; <rdar://problem/13757475>
(allow system-fsctl (fsctl-command (_IO "h" 47)))

;; Networking
(allow network-outbound
       ;; ObjC map_images needs to send logging data to syslog. <rdar://problem/39778918>
       (literal "/private/var/run/syslog")
)

;; CFNetwork
(allow file-read-data (path "/private/var/db/nsurlstoraged/dafsaData.bin"))

#if PLATFORM(MAC)
;; FIXME should be removed when <rdar://problem/9347205> + related radar in Safari is fixed
(allow mach-lookup
       (global-name "com.apple.system.logger")
       (global-name "com.apple.system.notification_center"))
#endif

(deny file-write-create (vnode-type SYMLINK))

;; Reserve a namespace for additional protected extended attributes.
(deny file-read-xattr file-write-xattr (xattr-prefix "com.apple.security.private."))

(deny file-read* file-write* (with no-log)
       ;; FIXME: Should be removed after <rdar://problem/10463881> is fixed.
       (home-literal "/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV2")
       (home-literal "/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV2-journal"))

;; Deny access needed for unnecessary NSApplication initialization.
;; FIXME: This can be removed once <rdar://problem/13011633> is fixed.
(deny file-read* (with no-log)
       (subpath "/Library/InputManagers")
       (home-subpath "/Library/InputManagers"))
(deny user-preference-read (with no-log)
    (preference-domain "com.apple.speech.recognition.AppleSpeechRecognition.prefs"))
(deny mach-lookup (with no-log)
       (global-name "com.apple.coreservices.appleevents")
       (global-name "com.apple.pasteboard.1")
       (global-name "com.apple.speech.recognitionserver"))
#if PLATFORM(MAC)
;; Also part of unnecessary NSApplication initialization, but we can't block access to these yet, see <rdar://problem/13869765>.
(allow file-read*
       (subpath "/Library/Components")
       (subpath "/Library/Keyboard Layouts")
       (subpath "/Library/Input Methods")
       (home-subpath "/Library/Components")
       (home-subpath "/Library/Keyboard Layouts")
       (home-subpath "/Library/Input Methods"))
#endif

;; Data Detectors
(allow file-read* (subpath "/private/var/db/datadetectors/sys"))

;; Allow accesses to HID
(allow iokit-open
    (iokit-user-client-class "IOHIDLibUserClient"))

;; Allow accesses to LocalAuthentication and RemoteService
(allow mach-lookup
    (global-name "com.apple.CoreAuthentication.agent")
    (global-name "com.apple.remoted"))