CasperSecurity
"""Messages for talking to the DBus daemon itself
Generated by jeepney.bindgen and modified by hand.
"""
from .low_level import Message, MessageType, HeaderFields
from .wrappers import MessageGenerator, new_method_call
__all__ = [
'DBusNameFlags',
'DBus',
'message_bus',
'Monitoring',
'Stats',
'MatchRule',
]
class DBusNameFlags:
allow_replacement = 1
replace_existing = 2
do_not_queue = 4
class DBus(MessageGenerator):
"""Messages to talk to the message bus
"""
interface = 'org.freedesktop.DBus'
def __init__(self, object_path='/org/freedesktop/DBus',
bus_name='org.freedesktop.DBus'):
super().__init__(object_path=object_path, bus_name=bus_name)
def Hello(self):
return new_method_call(self, 'Hello')
def RequestName(self, name, flags=0):
return new_method_call(self, 'RequestName', 'su', (name, flags))
def ReleaseName(self, name):
return new_method_call(self, 'ReleaseName', 's', (name,))
def StartServiceByName(self, name):
return new_method_call(self, 'StartServiceByName', 'su',
(name, 0))
def UpdateActivationEnvironment(self, env):
return new_method_call(self, 'UpdateActivationEnvironment', 'a{ss}',
(env,))
def NameHasOwner(self, name):
return new_method_call(self, 'NameHasOwner', 's', (name,))
def ListNames(self):
return new_method_call(self, 'ListNames')
def ListActivatableNames(self):
return new_method_call(self, 'ListActivatableNames')
def AddMatch(self, rule):
"""*rule* can be a str or a :class:`MatchRule` instance"""
if isinstance(rule, MatchRule):
rule = rule.serialise()
return new_method_call(self, 'AddMatch', 's', (rule,))
def RemoveMatch(self, rule):
if isinstance(rule, MatchRule):
rule = rule.serialise()
return new_method_call(self, 'RemoveMatch', 's', (rule,))
def GetNameOwner(self, name):
return new_method_call(self, 'GetNameOwner', 's', (name,))
def ListQueuedOwners(self, name):
return new_method_call(self, 'ListQueuedOwners', 's', (name,))
def GetConnectionUnixUser(self, name):
return new_method_call(self, 'GetConnectionUnixUser', 's', (name,))
def GetConnectionUnixProcessID(self, name):
return new_method_call(self, 'GetConnectionUnixProcessID', 's', (name,))
def GetAdtAuditSessionData(self, name):
return new_method_call(self, 'GetAdtAuditSessionData', 's', (name,))
def GetConnectionSELinuxSecurityContext(self, name):
return new_method_call(self, 'GetConnectionSELinuxSecurityContext', 's',
(name,))
def ReloadConfig(self):
return new_method_call(self, 'ReloadConfig')
def GetId(self):
return new_method_call(self, 'GetId')
def GetConnectionCredentials(self, name):
return new_method_call(self, 'GetConnectionCredentials', 's', (name,))
message_bus = DBus()
class Monitoring(MessageGenerator):
interface = 'org.freedesktop.DBus.Monitoring'
def __init__(self, object_path='/org/freedesktop/DBus',
bus_name='org.freedesktop.DBus'):
super().__init__(object_path=object_path, bus_name=bus_name)
def BecomeMonitor(self, rules):
"""Convert this connection to a monitor connection (advanced)"""
return new_method_call(self, 'BecomeMonitor', 'asu', (rules, 0))
class Stats(MessageGenerator):
interface = 'org.freedesktop.DBus.Debug.Stats'
def __init__(self, object_path='/org/freedesktop/DBus',
bus_name='org.freedesktop.DBus'):
super().__init__(object_path=object_path, bus_name=bus_name)
def GetStats(self):
return new_method_call(self, 'GetStats')
def GetConnectionStats(self, arg0):
return new_method_call(self, 'GetConnectionStats', 's',
(arg0,))
def GetAllMatchRules(self):
return new_method_call(self, 'GetAllMatchRules')
class MatchRule:
"""Construct a match rule to subscribe to DBus messages.
e.g.::
mr = MatchRule(
interface='org.freedesktop.DBus',
member='NameOwnerChanged',
type='signal'
)
msg = message_bus.AddMatch(mr)
# Send this message to subscribe to the signal
"""
def __init__(self, *, type=None, sender=None, interface=None, member=None,
path=None, path_namespace=None, destination=None,
eavesdrop=False):
if isinstance(type, str):
type = MessageType[type]
self.message_type = type
fields = {
'sender': sender,
'interface': interface,
'member': member,
'path': path,
'destination': destination,
}
self.header_fields = {
k: v for (k, v) in fields.items() if (v is not None)
}
self.path_namespace = path_namespace
self.eavesdrop = eavesdrop
self.arg_conditions = {}
def add_arg_condition(self, argno: int, value: str, kind='string'):
"""Add a condition for a particular argument
argno: int, 0-63
kind: 'string', 'path', 'namespace'
"""
if kind not in {'string', 'path', 'namespace'}:
raise ValueError("kind={!r}".format(kind))
if kind == 'namespace' and argno != 0:
raise ValueError("argno must be 0 for kind='namespace'")
self.arg_conditions[argno] = (value, kind)
def serialise(self) -> str:
"""Convert to a string to use in an AddMatch call to the message bus"""
pairs = list(self.header_fields.items())
if self.message_type:
pairs.append(('type', self.message_type.name))
if self.eavesdrop:
pairs.append(('eavesdrop', 'true'))
for argno, (val, kind) in self.arg_conditions.items():
if kind == 'string':
kind = ''
pairs.append((f'arg{argno}{kind}', val))
# Quoting rules: single quotes ('') needed if the value contains a comma.
# A literal ' can only be represented outside single quotes, by
# backslash-escaping it. No escaping inside the quotes.
# The simplest way to handle this is to use '' around every value, and
# use '\'' (end quote, escaped ', restart quote) for literal ' .
return ','.join(
"{}='{}'".format(k, v.replace("'", r"'\''")) for (k, v) in pairs
)
def matches(self, msg: Message) -> bool:
"""Returns True if msg matches this rule"""
h = msg.header
if (self.message_type is not None) and h.message_type != self.message_type:
return False
for field, expected in self.header_fields.items():
if h.fields.get(HeaderFields[field], None) != expected:
return False
if self.path_namespace is not None:
path = h.fields.get(HeaderFields.path, '\0')
path_ns = self.path_namespace.rstrip('/')
if not ((path == path_ns) or path.startswith(path_ns + '/')):
return False
for argno, (expected, kind) in self.arg_conditions.items():
if argno >= len(msg.body):
return False
arg = msg.body[argno]
if not isinstance(arg, str):
return False
if kind == 'string':
if arg != expected:
return False
elif kind == 'path':
if not (
(arg == expected)
or (expected.endswith('/') and arg.startswith(expected))
or (arg.endswith('/') and expected.startswith(arg))
):
return False
elif kind == 'namespace':
if not (
(arg == expected)
or arg.startswith(expected + '.')
):
return False
return True