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# SPDX-License-Identifier: AGPL-3.0-or-later
"""Tor Proxy utility functions."""
import itertools
import augeas
from plinth import app as app_module
from plinth.daemon import app_is_running
from . import privileged
APT_SOURCES_URI_PATHS = ('/files/etc/apt/sources.list/*/uri',
'/files/etc/apt/sources.list.d/*/*/uri',
'/files/etc/apt/sources.list.d/*/*/URIs/*')
APT_TOR_PREFIX = 'tor+'
def get_status(initialized=True):
"""Return current Tor status."""
status = privileged.get_status()
app = app_module.App.get('torproxy')
return {
'enabled': app.is_enabled() if initialized else False,
'is_running': app_is_running(app) if initialized else False,
'use_upstream_bridges': status['use_upstream_bridges'],
'upstream_bridges': status['upstream_bridges'],
'apt_transport_tor_enabled': is_apt_transport_tor_enabled()
}
def iter_apt_uris(aug):
"""Iterate over all the APT source URIs."""
return itertools.chain.from_iterable(
[aug.match(path) for path in APT_SOURCES_URI_PATHS])
def get_augeas(raise_exception=True):
"""Return an instance of Augeaus for processing APT configuration."""
aug = augeas.Augeas(flags=augeas.Augeas.NO_LOAD +
augeas.Augeas.NO_MODL_AUTOLOAD)
aug.set('/augeas/load/Aptsources/lens', 'Aptsources.lns')
aug.set('/augeas/load/Aptsources/incl[last() + 1]',
'/etc/apt/sources.list')
aug.set('/augeas/load/Aptsources/incl[last() + 1]',
'/etc/apt/sources.list.d/*.list')
aug.set('/augeas/load/Aptsources822/lens', 'Aptsources822.lns')
aug.set('/augeas/load/Aptsources822/incl[last() + 1]',
'/etc/apt/sources.list.d/*.sources')
aug.load()
# Check for any errors in parsing sources lists.
if raise_exception:
if aug.match('/augeas/files/etc/apt/sources.list/error') or \
aug.match('/augeas/files/etc/apt/sources.list.d//error'):
raise Exception('Error parsing sources list')
return aug
def is_apt_transport_tor_enabled():
"""Return whether APT is set to download packages over Tor."""
try:
aug = get_augeas()
except Exception:
# If there was an error with parsing.
return False
for uri_path in iter_apt_uris(aug):
uri = aug.get(uri_path)
if not uri.startswith(APT_TOR_PREFIX) and \
(uri.startswith('http://') or uri.startswith('https://')):
return False
return True
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