profiles.py

   1 from bubblebox import *
   2
   3 # Various default sandbox settings
   4 DEFAULT = group(
   5   # namespace unsharing
   6   # cannot unshare IPC as that breaks some wine applications
   7   bwrap_flags("--unshare-user", "--unshare-pid", "--unshare-cgroup"),
   8   # A different hostname is useful to be able to see when we are inside the sandbox.
   9   # However, some applications will not like this unless the hostname also exists in `/etc/hosts`!
  10   bwrap_flags("--unshare-uts", "--hostname", "bubblebox"),
  11   # Make sure the sandbox cannot inject commands into the host terminal.
  12   # TODO: This flag breaks some CLI applications, like job control in shells.
  13   # Consider using SECCOMP instead.
  14   # Possible code to use for that: <https://gist.github.com/sloonz/4b7f5f575a96b6fe338534dbc2480a5d#file-sandbox-py-L129>
  15   # There is also a good list of possible-syscalls-to-block at
  16   # <https://github.com/flatpak/flatpak/blob/f16e064fd9454fb8f754b769ad1ffce0e42b51db/common/flatpak-run.c#L1791>.
  17   bwrap_flags("--new-session"),
  18   # basic directories
  19   bwrap_flags("--proc", "/proc", "--dev", "/dev", "--dir", "/tmp", "--dir", "/var", "--dir", "/run", "--symlink", "../run", "/var/run"),
  20   # an empty XDG_RUNTIME_DIR
  21   bwrap_flags("--perms", "0700", "--dir", XDG_RUNTIME_DIR),
  22   # merged-usr symlinks
  23   bwrap_flags("--symlink", "usr/lib", "/lib", "--symlink", "usr/lib64", "/lib64", "--symlink", "usr/bin", "/bin", "--symlink", "usr/sbin", "/sbin"),
  24   # folders we always need access to
  25   host_access({ ("/usr", "/sys", "/etc"): Access.Read }),
  26   # make a basic shell work
  27   home_access({
  28     (".bashrc", ".bash_aliases", ".profile"): Access.Read,
  29     "bin": Access.Read,
  30   }),
  31 )
  32
  33 def X11():
  34   display = os.environ["DISPLAY"].removeprefix(":").split('.')[0]
  35   return host_access({
  36       "/tmp/.X11-unix/": {
  37         "X"+display: Access.Read,
  38       },
  39       os.environ["XAUTHORITY"]: Access.Read,
  40   })
  41
  42 # https://github.com/igo95862/bubblejail/blob/master/src/bubblejail/services.py is a good source of paths that need allowing.
  43 # We do not give access to pipewire, that needs a portal (https://docs.pipewire.org/page_portal.html).
  44 def DESKTOP(name):
  45   return group(
  46     DEFAULT,
  47     # Share XDG_RUNTIME_DIR among all instances of this sandbox
  48     shared_runtime_dir(name),
  49     # Access to display servers, hardware acceleration, and audio
  50     host_access({
  51       "dev": {
  52         ("dri", "snd"): Access.Device,
  53       },
  54       XDG_RUNTIME_DIR: {
  55         (os.environ["WAYLAND_DISPLAY"], "pulse"): Access.Read,
  56       },
  57     }),
  58     X11(),
  59     # Access to some key user configuration
  60     home_access({
  61       (".config/fontconfig", ".XCompose", ".local/share/applications"): Access.Read,
  62     }),
  63     # Access to basic d-bus services (that are hopefully safe to expose...)
  64     dbus_proxy_flags(
  65       "--call=org.kde.StatusNotifierWatcher=@/StatusNotifierWatcher",
  66       "--call=org.freedesktop.Notifications=@/org/freedesktop/Notifications",
  67       "--call=org.freedesktop.ScreenSaver=@/org/freedesktop/ScreenSaver",
  68       "--call=org.freedesktop.ScreenSaver=@/ScreenSaver",
  69       "--talk=org.freedesktop.portal.*",
  70     ),
  71     # Make it possible to open websites in Firefox
  72     home_access({ ".mozilla/firefox/profiles.ini": Access.Read }),
  73     dbus_proxy_flags("--call=org.mozilla.firefox.*=@/org/mozilla/firefox/Remote"),
  74   )