Source/WebKit/StorageProcess/mac/com.apple.WebKit.Storage.sb.in

; Copyright (C) 2014-2016 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))
(allow system-audit file-read-metadata)

(import "system.sb")

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

(deny sysctl*)
(allow sysctl-read
    (sysctl-name
        "hw.availcpu"
        "hw.ncpu"
        "hw.model"
        "kern.memorystatus_level"
        "vm.footprint_suspend"))

(deny iokit-get-properties)

#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101300
(deny mach-lookup (xpc-service-name-prefix ""))
#endif

;; 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-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))))))

;; IOKit user clients
(allow iokit-open
    (iokit-user-client-class "RootDomainUserClient"))

;; Security framework
(allow mach-lookup
       (global-name "com.apple.SecurityServer"))
(allow user-preference-read
    (preference-domain
        "com.apple.security"
        "com.apple.security.revocation"))
(allow file-read*
       (subpath "/private/var/db/mds")
       (literal "/private/var/db/DetachedSignatures")
       ; The following are needed until <rdar://problem/11134688> is resolved.
       (literal "/Library/Preferences/com.apple.security.plist")
       (literal "/Library/Preferences/com.apple.security.revocation.plist")
       (home-literal "/Library/Preferences/com.apple.security.plist")
       (home-literal "/Library/Preferences/com.apple.security.revocation.plist"))
(allow ipc-posix-shm-read* ipc-posix-shm-write-data
       (ipc-posix-name "com.apple.AppleDatabaseChanged"))
(if (positive? (string-length (param "DARWIN_USER_CACHE_DIR")))
    (allow-read-write-directory-and-issue-read-write-extensions (param "DARWIN_USER_CACHE_DIR")))
(if (positive? (string-length (param "DARWIN_USER_TEMP_DIR")))
    (allow-read-write-directory-and-issue-read-write-extensions (param "DARWIN_USER_TEMP_DIR")))

;; Read-only preferences and data
(allow user-preference-read
    (preference-domain
        "kCFPreferencesAnyApplication"))
(allow file-read*
    ;; Basic system paths
    (subpath "/Library/Frameworks")
    (subpath "/Library/Managed Preferences")

    ;; On-disk WebKit2 framework location, to account for debug installations
    ;; outside of /System/Library/Frameworks
    (subpath (param "WEBKIT2_FRAMEWORK_DIR")))
(allow system-fsctl (fsctl-command (_IO "h" 47)))

;; Various services required by CFNetwork and other frameworks
(allow mach-lookup
#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101300
    (global-name "com.apple.analyticsd")
#endif
    (global-name "com.apple.lsd.mapdb")
)

;; 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"))

(if (defined? 'vnode-type)
    (deny file-write-create (vnode-type SYMLINK)))

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