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d92ca09e19
Fixes #1906 Signed-off-by: Joseph Nuthalapati <njoseph@riseup.net> Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
133 lines
4.2 KiB
Python
133 lines
4.2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""
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Tor utility functions
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"""
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import glob
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import itertools
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import json
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import augeas
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from plinth import actions
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from plinth.daemon import app_is_running
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from plinth.modules import tor
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from plinth.modules.names.components import DomainName
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APT_SOURCES_URI_PATHS = ('/files/etc/apt/sources.list/*/uri',
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'/files/etc/apt/sources.list.d/*/*/uri')
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APT_TOR_PREFIX = 'tor+'
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def get_status(initialized=True):
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"""Return current Tor status."""
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output = actions.superuser_run('tor', ['get-status'])
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status = json.loads(output)
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hs_info = status['hidden_service']
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hs_services = []
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if hs_info['hostname']:
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try:
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domain = DomainName.get('domain-tor-' + hs_info['hostname'])
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except KeyError:
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pass
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else:
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hs_services = domain.get_readable_services()
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# Filter out obfs3/4 ports when bridge relay is disabled
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ports = {
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service_type: port
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for service_type, port in status['ports'].items()
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if service_type not in ['obfs4', 'obfs3']
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or status['bridge_relay_enabled']
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}
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return {
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'enabled': tor.app.is_enabled() if initialized else False,
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'is_running': app_is_running(tor.app) if initialized else False,
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'use_upstream_bridges': status['use_upstream_bridges'],
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'upstream_bridges': status['upstream_bridges'],
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'relay_enabled': status['relay_enabled'],
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'bridge_relay_enabled': status['bridge_relay_enabled'],
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'ports': ports,
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'hs_enabled': hs_info['enabled'],
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'hs_status': hs_info['status'],
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'hs_hostname': hs_info['hostname'],
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'hs_ports': hs_info['ports'],
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'hs_services': hs_services,
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'apt_transport_tor_enabled': is_apt_transport_tor_enabled()
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}
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def iter_apt_uris(aug):
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"""Iterate over all the APT source URIs."""
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return itertools.chain.from_iterable(
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[aug.match(path) for path in APT_SOURCES_URI_PATHS])
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def get_real_apt_uri_path(aug, path):
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"""Return the actual path which contains APT URL.
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XXX: This is a workaround for Augeas bug parsing Apt source files
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with '[options]'. Remove this workaround after Augeas lens is
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fixed.
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"""
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uri = aug.get(path)
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if uri[0] == '[':
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parent_path = path.rsplit('/', maxsplit=1)[0]
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skipped = False
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for child_path in aug.match(parent_path + '/*')[1:]:
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if skipped:
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return child_path
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value = aug.get(child_path)
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if value[-1] == ']':
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skipped = True
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return path
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def get_augeas():
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"""Return an instance of Augeaus for processing APT configuration."""
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aug = augeas.Augeas(flags=augeas.Augeas.NO_LOAD +
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augeas.Augeas.NO_MODL_AUTOLOAD)
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aug.set('/augeas/load/Aptsources/lens', 'Aptsources.lns')
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aug.set('/augeas/load/Aptsources/incl[last() + 1]',
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'/etc/apt/sources.list')
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aug.set('/augeas/load/Aptsources/incl[last() + 1]',
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'/etc/apt/sources.list.d/*.list')
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aug.load()
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# Currently, augeas does not handle Deb822 format, it error out.
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if aug.match('/augeas/files/etc/apt/sources.list/error') or \
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aug.match('/augeas/files/etc/apt/sources.list.d//error'):
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raise Exception('Error parsing sources list')
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# Starting with Apt 1.1, /etc/apt/sources.list.d/*.sources will
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# contain files with Deb822 format. If they are found, error out
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# for now. XXX: Provide proper support Deb822 format with a new
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# Augeas lens.
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if glob.glob('/etc/apt/sources.list.d/*.sources'):
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raise Exception('Can not handle Deb822 source files')
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return aug
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def is_apt_transport_tor_enabled():
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"""Return whether APT is set to download packages over Tor."""
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try:
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aug = get_augeas()
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except Exception:
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# If there was an error with parsing or there are Deb822
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# files.
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return False
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for uri_path in iter_apt_uris(aug):
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uri_path = get_real_apt_uri_path(aug, uri_path)
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uri = aug.get(uri_path)
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if not uri.startswith(APT_TOR_PREFIX) and \
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(uri.startswith('http://') or uri.startswith('https://')):
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return False
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return True
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