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- # -*- encoding: utf8 -*-
- #
- # The Qubes OS Project, http://www.qubes-os.org
- #
- # Copyright (C) 2017 Marek Marczykowski-Górecki
- # <marmarek@invisiblethingslab.com>
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 2 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program; if not, see <http://www.gnu.org/licenses/>.
- ''' Interface for methods not being part of Admin API, but still handled by
- qubesd. '''
- import asyncio
- import string
- import qubes.api
- import qubes.api.admin
- import qubes.vm.dispvm
- class QubesMiscAPI(qubes.api.AbstractQubesAPI):
- @qubes.api.method('qubes.FeaturesRequest', no_payload=True)
- @asyncio.coroutine
- def qubes_features_request(self):
- ''' qubes.FeaturesRequest handler
- VM (mostly templates) can request some features from dom0 for itself.
- Then dom0 (qubesd extension) may respect this request or ignore it.
- Technically, VM first write requested features into QubesDB in
- `/features-request/` subtree, then call this method. The method will
- dispatch 'features-request' event, which may be handled by
- appropriate extensions. Requests not explicitly handled by some
- extension are ignored.
- '''
- assert self.dest.name == 'dom0'
- assert not self.arg
- prefix = '/features-request/'
- untrusted_features = {key[len(prefix):]:
- self.src.qdb.read(key).decode('ascii', errors='strict')
- for key in self.src.qdb.list(prefix)}
- safe_set = string.ascii_letters + string.digits
- for untrusted_key in untrusted_features:
- untrusted_value = untrusted_features[untrusted_key]
- assert all((c in safe_set) for c in untrusted_value)
- self.src.fire_event('features-request',
- untrusted_features=untrusted_features)
- self.app.save()
- @qubes.api.method('qubes.NotifyTools', no_payload=True)
- @asyncio.coroutine
- def qubes_notify_tools(self):
- '''
- Legacy version of qubes.FeaturesRequest, used by Qubes Windows Tools
- '''
- assert self.dest.name == 'dom0'
- assert not self.arg
- if getattr(self.src, 'template', None):
- self.src.log.warning(
- 'Ignoring qubes.NotifyTools for template-based VM')
- return
- # for now used only to check for the tools presence
- untrusted_version = self.src.qdb.read('/qubes-tools/version')
- # reserved for future use
- #untrusted_os = self.src.qdb.read('/qubes-tools/os')
- # qrexec agent presence (0 or 1)
- untrusted_qrexec = self.src.qdb.read('/qubes-tools/qrexec')
- # gui agent presence (0 or 1)
- untrusted_gui = self.src.qdb.read('/qubes-tools/gui')
- # default user for qvm-run etc
- # starting with Qubes 4.x ignored
- #untrusted_user = self.src.qdb.read('/qubes-tools/default-user')
- if untrusted_version is None:
- # tools didn't advertised its features; it's strange that this
- # service is called, but ignore it
- return
- # any suspicious string will raise exception here
- int(untrusted_version)
- del untrusted_version
- # untrusted_os - ignore for now
- if untrusted_qrexec is None:
- qrexec = False
- else:
- qrexec = bool(int(untrusted_qrexec))
- del untrusted_qrexec
- if untrusted_gui is None:
- gui = False
- else:
- gui = bool(int(untrusted_gui))
- del untrusted_gui
- # ignore default_user
- prev_qrexec = self.src.features.get('qrexec', False)
- # Let the tools to be able to enable *or disable*
- # each particular component
- self.src.features['qrexec'] = qrexec
- self.src.features['gui'] = gui
- self.app.save()
- if not prev_qrexec and qrexec:
- # if this is the first time qrexec was advertised, now can finish
- # template setup
- self.src.fire_event('template-postinstall')
- @qubes.api.method('qubes.NotifyUpdates')
- @asyncio.coroutine
- def qubes_notify_updates(self, untrusted_payload):
- '''
- Receive VM notification about updates availability
- Payload contains a single integer - either 0 (no updates) or some
- positive value (some updates).
- '''
- untrusted_update_count = untrusted_payload.strip()
- assert untrusted_update_count.isdigit()
- # now sanitized
- update_count = int(untrusted_update_count)
- del untrusted_update_count
- if self.src.updateable:
- # Just trust information from VM itself
- self.src.updates_available = bool(update_count)
- self.app.save()
- elif getattr(self.src, 'template', None) is not None:
- # Hint about updates availability in template
- # If template is running - it will notify about updates itself
- if self.src.template.is_running():
- return
- # Ignore no-updates info
- if update_count > 0:
- # If VM is outdated, updates were probably already installed
- # in the template - ignore info
- if self.src.storage.outdated_volumes:
- return
- self.src.template.updates_available = bool(update_count)
- self.app.save()
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