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First minimal version, with just listing VMs and handling properties.

QubesOS/qubes-issues#853
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Marek Marczykowski-Górecki 2017-02-24 00:14:13 +01:00
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This is client side implementation of Qubes management API. See
https://www.qubes-os.org/doc/mgmt1/ for protocol specification.

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import ast
import os
import qubesmgmt.exc
class property(object):
DEFAULT = object()
class PropertyHolder(object):
'''A base class for object having properties retrievable using mgmt API.
Warning: each (non-private) local attribute needs to be defined at class
level, even if initialized in __init__; otherwise will be treated as
property retrievable using mgmt call.
'''
#: a place for appropriate Qubes() object (QubesLocal or QubesRemote),
# use None for self
app = None
def __init__(self, app, method_prefix, method_dest):
#: appropriate Qubes() object (QubesLocal or QubesRemote), use None
# for self
self.app = app
self._method_prefix = method_prefix
self._method_dest = method_dest
self._properties = None
self._properties_help = None
def _do_qubesd_call(self, dest, method, arg=None, payload=None):
'''
Call into qubesd using appropriate mechanism. This method should be
defined by a subclass.
:param dest: Destination VM name
:param method: Full API method name ('mgmt...')
:param arg: Method argument (if any)
:param payload: Payload send to the method
:return: Data returned by qubesd (string)
'''
# have the actual implementation at Qubes() instance
if self.app:
return self.app._do_qubesd_call(dest, method, arg, payload)
raise NotImplementedError
def _parse_qubesd_response(self, response_data):
if response_data[0:2] == b'\x30\x00':
return response_data[2:]
elif response_data[0:2] == b'\x32\x00':
(_, exc_type, traceback, format_string, args) = \
response_data.split(b'\x00', 4)
# drop last field because of terminating '\x00'
args = [arg.decode() for arg in args.split(b'\x00')[:-1]]
format_string = format_string.decode('utf-8')
exc_class = getattr(qubesmgmt.exc, exc_type, 'QubesException')
# TODO: handle traceback if given
raise exc_class(format_string, *args)
else:
raise qubesmgmt.exc.QubesException('Invalid response format')
def property_list(self):
if self._properties is None:
properties_str = self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'List',
None,
None)
self._properties = properties_str.splitlines()
# TODO: make it somehow immutable
return self._properties
def property_is_default(self, item):
if item.startswith('_'):
raise AttributeError(item)
property_str = self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'Get',
item,
None)
(default, value) = property_str.split(b' ', 1)
assert default.startswith(b'default=')
is_default_str = default.split(b'=')[1]
is_default = ast.literal_eval(is_default_str.decode('ascii'))
assert isinstance(is_default, bool)
return is_default
def __getattr__(self, item):
if item.startswith('_'):
raise AttributeError(item)
property_str = self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'Get',
item,
None)
(default, value) = property_str.split(' ', 1)
if value[0] == '\'':
return ast.literal_eval('b' + value)
else:
return ast.literal_eval(value)
def __setattr__(self, key, value):
if key.startswith('_') or key in dir(self):
return super(PropertyHolder, self).__setattr__(key, value)
if value is property.DEFAULT:
self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'Reset',
key,
None)
else:
if isinstance(value, qubesmgmt.vm.QubesVM):
value = value._name
self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'Set',
key,
bytes(value))
def __delattr__(self, name):
if name.startswith('_') or name in dir(self):
return super(PropertyHolder, self).__delattr__(name)
self._do_qubesd_call(
self._method_dest,
self._method_prefix + 'Reset',
name
)
import qubesmgmt.app
if os.path.exists(qubesmgmt.app.QUBESD_SOCK):
Qubes = qubesmgmt.app.QubesLocal
else:
Qubes = qubesmgmt.app.QubesRemote

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import socket
import subprocess
import qubesmgmt
import qubesmgmt.vm
import qubesmgmt.exc
QUBESD_SOCK = '/var/run/qubesd.sock'
BUF_SIZE = 4096
class VMCollection(object):
def __init__(self, app):
self.app = app
self._vm_list = None
def refresh_cache(self, force=False):
if not force and self._vm_list is not None:
return
vm_list_data = self.app._do_qubesd_call(
'dom0',
'mgmt.vm.List'
)
new_vm_list = {}
# FIXME: this will probably change
for vm_data in vm_list_data.splitlines():
vm_name, props = vm_data.split(b' ', 1)
props = props.split(b' ')
new_vm_list[vm_name] = dict(
[vm_prop.split(b'=', 1) for vm_prop in props])
self._vm_list = new_vm_list
def __getitem__(self, item):
if item not in self:
raise KeyError(item)
return qubesmgmt.vm.QubesVM(
self.app, item, self._vm_list[item]['class'])
def __contains__(self, item):
self.refresh_cache()
return item in self._vm_list
def __iter__(self):
self.refresh_cache()
for vm in self._vm_list:
yield self[vm]
def keys(self):
self.refresh_cache()
return self._vm_list.keys()
class QubesBase(qubesmgmt.PropertyHolder):
'''Main Qubes application'''
#: domains (VMs) collection
domains = None
def __init__(self):
super(QubesBase, self).__init__(self, 'mgmt.global.', 'dom0')
self.domains = VMCollection(self)
class QubesLocal(QubesBase):
def _do_qubesd_call(self, dest, method, arg=None, payload=None):
try:
client_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
client_socket.connect(QUBESD_SOCK)
except IOError:
# TODO:
raise
# src, method, dest, arg
for call_arg in ('dom0', method, dest, arg):
client_socket.sendall(call_arg.encode('ascii'))
client_socket.sendall(b'\0')
if payload is not None:
client_socket.sendall(payload)
return_data = b''.join(iter(client_socket.recv(BUF_SIZE), b''))
return self._parse_qubesd_response(return_data)
class QubesRemote(QubesBase):
def _do_qubesd_call(self, dest, method, arg=None, payload=None):
service_name = method
if arg is not None:
service_name += '+' + arg
p = subprocess.Popen(['qrexec-client-vm', dest, service_name],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(stdout, stderr) = p.communicate(payload)
if p.returncode != 0:
# TODO: use dedicated exception
raise qubesmgmt.exc.QubesException('Service call error: %s',
stderr.decode())
return self._parse_qubesd_response(stdout)

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
class QubesException(Exception):
def __init__(self, message_format, *args, **kwargs):
# TODO: handle translations
super(QubesException, self).__init__(message_format % args, **kwargs)

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import unittest
import qubesmgmt
import qubesmgmt.app
class QubesTest(qubesmgmt.app.QubesBase):
expected_calls = None
actual_calls = None
def __init__(self):
super(QubesTest, self).__init__()
#: expected calls and saved replies for them
self.expected_calls = {}
#: actual calls made
self.actual_calls = []
def _do_qubesd_call(self, dest, method, arg=None, payload=None):
call_key = (dest, method, arg, payload)
self.actual_calls.append(call_key)
if call_key not in self.expected_calls:
raise AssertionError('Unexpected call {!r}'.format(call_key))
return_data = self.expected_calls[call_key]
return self._parse_qubesd_response(return_data)
class QubesTestCase(unittest.TestCase):
def setUp(self):
super(QubesTestCase, self).setUp()
self.app = QubesTest()
def assertAllCalled(self):
self.assertEqual(
set(self.app.expected_calls.keys()),
set(self.app.actual_calls))

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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 Lesser 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import qubesmgmt.tests
class TC_00_VMCollection(qubesmgmt.tests.QubesTestCase):
def test_000_list(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'0\x00test-vm class=AppVM state=running\n'
self.assertEqual(
self.app.domains.keys(),
['test-vm'])
self.assertAllCalled()
def test_001_getitem(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'0\x00test-vm class=AppVM state=running\n'
try:
vm = self.app.domains['test-vm']
self.assertEqual(vm._name, 'test-vm')
except KeyError:
self.fail('VM not found in collection')
self.assertAllCalled()
with self.assertRaises(KeyError):
vm = self.app.domains['test-non-existent']
self.assertAllCalled()
def test_002_in(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'0\x00test-vm class=AppVM state=running\n'
self.assertIn('test-vm', self.app.domains)
self.assertAllCalled()
self.assertNotIn('test-non-existent', self.app.domains)
self.assertAllCalled()
def test_003_iter(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'0\x00test-vm class=AppVM state=running\n'
self.assertEqual([vm._name for vm in self.app.domains], ['test-vm'])
self.assertAllCalled()

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import qubesmgmt.exc
import qubesmgmt.tests
import unittest
class TC_00_Errors(qubesmgmt.tests.QubesTestCase):
def test_000_exception(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'2\x00QubesException\x00\x00An error occurred\x00'
with self.assertRaises(qubesmgmt.exc.QubesException) as context:
vms = list(self.app.domains)
self.assertEqual(str(context.exception), 'An error occurred')
def test_001_exception_with_fields(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'2\x00QubesException\x00\x00' \
b'An error occurred: %s, %s\x00string\x00other\x00'
with self.assertRaises(qubesmgmt.exc.QubesException) as context:
vms = list(self.app.domains)
self.assertEqual(str(context.exception),
'An error occurred: string, other')
@unittest.expectedFailure
def test_002_exception_with_numbers(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'2\x00QubesException\x00\x00' \
b'An error occurred: %d, %d\x001\x002\x00'
try:
with self.assertRaises(qubesmgmt.exc.QubesException) as context:
vms = list(self.app.domains)
except TypeError as e:
self.fail('TypeError: {!s}'.format(e))
self.assertEqual(str(context.exception), 'An error occurred: 1 2')
def test_010_empty(self):
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = b''\
# FIXME: change to appropriate exception when defined
with self.assertRaises(qubesmgmt.exc.QubesException) as context:
vms = list(self.app.domains)
self.assertEqual(str(context.exception), 'Invalid response format')

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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 Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import qubesmgmt.tests
class VMTestCase(qubesmgmt.tests.QubesTestCase):
def setUp(self):
super(VMTestCase, self).setUp()
self.app.expected_calls[('dom0', 'mgmt.vm.List', None, None)] = \
b'0\x00test-vm class=AppVM state=running\n'
self.vm = self.app.domains['test-vm']

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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 Lesser 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import qubesmgmt.tests
class TC_00_Properties(qubesmgmt.tests.vm.VMTestCase):
def test_000_list(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.List', None, None)] = \
b'0\x00prop1\nprop2\n'
self.assertEqual(
self.vm.property_list(),
['prop1', 'prop2'])
self.assertAllCalled()
def test_001_get_str(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False \'value\''
self.assertEqual(self.vm.prop1, 'value')
self.assertAllCalled()
def test_002_get_int(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False 123'
self.assertEqual(self.vm.prop1, 123)
self.assertAllCalled()
def test_003_get_bool(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False True'
self.assertEqual(self.vm.prop1, True)
self.assertAllCalled()
def test_004_get_vm(self):
self.skipTest('not specified')
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False \'test-vm\''
self.assertEqual(self.vm.prop1, True)
self.assertAllCalled()
def test_005_get_none(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False None'
self.assertEqual(self.vm.prop1, None)
self.assertAllCalled()
def test_010_get_default(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=False \'value\''
self.assertEqual(self.vm.property_is_default('prop1'), False)
self.assertAllCalled()
def test_011_get_default(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Get', 'prop1', None)] = \
b'0\x00default=True \'value\''
self.assertEqual(self.vm.property_is_default('prop1'), True)
self.assertAllCalled()
def test_020_set_str(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Set', 'prop1', b'value')] = \
b'0\x00'
self.vm.prop1 = 'value'
self.assertAllCalled()
def test_021_set_int(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Set', 'prop1', b'123')] = \
b'0\x00'
self.vm.prop1 = 123
self.assertAllCalled()
def test_022_set_bool(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Set', 'prop1', b'True')] = \
b'0\x00'
self.vm.prop1 = True
self.assertAllCalled()
def test_023_set_vm(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Set', 'prop1', b'test-vm')] = \
b'0\x00'
self.vm.prop1 = self.vm
self.assertAllCalled()
def test_024_set_none(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Set', 'prop1', b'None')] = \
b'0\x00'
self.vm.prop1 = None
self.assertAllCalled()
def test_030_reset(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Reset', 'prop1', None)] = \
b'0\x00'
self.vm.prop1 = qubesmgmt.property.DEFAULT
self.assertAllCalled()
def test_031_reset(self):
self.app.expected_calls[
('test-vm', 'mgmt.vm.property.Reset', 'prop1', None)] = \
b'0\x00'
del self.vm.prop1
self.assertAllCalled()

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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/>.
import qubesmgmt
class QubesVM(qubesmgmt.PropertyHolder):
def __init__(self, app, name, vm_class):
self._name = name
self._class = vm_class
super(QubesVM, self).__init__(app, 'mgmt.vm.property.', name)