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Allow deleting an alias if the user has sufficient power level (#6986)

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Patrick Cloke 2020-03-04 11:30:46 -05:00 committed by GitHub
parent 8ef8fb2c1c
commit 13892776ef
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5 changed files with 192 additions and 74 deletions
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1
changelog.d/6986.feature Normal file
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@ -0,0 +1 @@
Users with a power level sufficient to modify the canonical alias of a room can now delete room aliases.

9
synapse/api/auth.py
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@ -539,7 +539,7 @@ class Auth(object):
@defer.inlineCallbacks
def check_can_change_room_list(self, room_id: str, user: UserID):
"""Check if the user is allowed to edit the room's entry in the
"""Determine whether the user is allowed to edit the room's entry in the
published room list.
Args:
@ -570,12 +570,7 @@ class Auth(object):
)
user_level = event_auth.get_user_power_level(user_id, auth_events)
if user_level < send_level:
raise AuthError(
403,
"This server requires you to be a moderator in the room to"
" edit its room list entry",
)
return user_level >= send_level
@staticmethod
def has_access_token(request):

107
synapse/handlers/directory.py
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@ -15,7 +15,7 @@
import logging
import string
from typing import List
from typing import Iterable, List, Optional
from twisted.internet import defer
@ -28,6 +28,7 @@ from synapse.api.errors import (
StoreError,
SynapseError,
)
from synapse.appservice import ApplicationService
from synapse.types import Requester, RoomAlias, UserID, get_domain_from_id
from ._base import BaseHandler
@ -55,7 +56,13 @@ class DirectoryHandler(BaseHandler):
self.spam_checker = hs.get_spam_checker()
@defer.inlineCallbacks
def _create_association(self, room_alias, room_id, servers=None, creator=None):
def _create_association(
self,
room_alias: RoomAlias,
room_id: str,
servers: Optional[Iterable[str]] = None,
creator: Optional[str] = None,
):
# general association creation for both human users and app services
for wchar in string.whitespace:
@ -81,17 +88,21 @@ class DirectoryHandler(BaseHandler):
@defer.inlineCallbacks
def create_association(
self, requester, room_alias, room_id, servers=None, check_membership=True,
self,
requester: Requester,
room_alias: RoomAlias,
room_id: str,
servers: Optional[List[str]] = None,
check_membership: bool = True,
):
"""Attempt to create a new alias
Args:
requester (Requester)
room_alias (RoomAlias)
room_id (str)
servers (list[str]|None): List of servers that others servers
should try and join via
check_membership (bool): Whether to check if the user is in the room
requester
room_alias
room_id
servers: Iterable of servers that others servers should try and join via
check_membership: Whether to check if the user is in the room
before the alias can be set (if the server's config requires it).
Returns:
@ -145,15 +156,15 @@ class DirectoryHandler(BaseHandler):
yield self._create_association(room_alias, room_id, servers, creator=user_id)
@defer.inlineCallbacks
def delete_association(self, requester, room_alias):
def delete_association(self, requester: Requester, room_alias: RoomAlias):
"""Remove an alias from the directory
(this is only meant for human users; AS users should call
delete_appservice_association)
Args:
requester (Requester):
room_alias (RoomAlias):
requester
room_alias
Returns:
Deferred[unicode]: room id that the alias used to point to
@ -189,16 +200,16 @@ class DirectoryHandler(BaseHandler):
room_id = yield self._delete_association(room_alias)
try:
yield self._update_canonical_alias(
requester, requester.user.to_string(), room_id, room_alias
)
yield self._update_canonical_alias(requester, user_id, room_id, room_alias)
except AuthError as e:
logger.info("Failed to update alias events: %s", e)
return room_id
@defer.inlineCallbacks
def delete_appservice_association(self, service, room_alias):
def delete_appservice_association(
self, service: ApplicationService, room_alias: RoomAlias
):
if not service.is_interested_in_alias(room_alias.to_string()):
raise SynapseError(
400,
@ -208,7 +219,7 @@ class DirectoryHandler(BaseHandler):
yield self._delete_association(room_alias)
@defer.inlineCallbacks
def _delete_association(self, room_alias):
def _delete_association(self, room_alias: RoomAlias):
if not self.hs.is_mine(room_alias):
raise SynapseError(400, "Room alias must be local")
@ -217,7 +228,7 @@ class DirectoryHandler(BaseHandler):
return room_id
@defer.inlineCallbacks
def get_association(self, room_alias):
def get_association(self, room_alias: RoomAlias):
room_id = None
if self.hs.is_mine(room_alias):
result = yield self.get_association_from_room_alias(room_alias)
@ -282,7 +293,9 @@ class DirectoryHandler(BaseHandler):
)
@defer.inlineCallbacks
def _update_canonical_alias(self, requester, user_id, room_id, room_alias):
def _update_canonical_alias(
self, requester: Requester, user_id: str, room_id: str, room_alias: RoomAlias
):
"""
Send an updated canonical alias event if the removed alias was set as
the canonical alias or listed in the alt_aliases field.
@ -331,7 +344,7 @@ class DirectoryHandler(BaseHandler):
)
@defer.inlineCallbacks
def get_association_from_room_alias(self, room_alias):
def get_association_from_room_alias(self, room_alias: RoomAlias):
result = yield self.store.get_association_from_room_alias(room_alias)
if not result:
# Query AS to see if it exists
@ -339,7 +352,7 @@ class DirectoryHandler(BaseHandler):
result = yield as_handler.query_room_alias_exists(room_alias)
return result
def can_modify_alias(self, alias, user_id=None):
def can_modify_alias(self, alias: RoomAlias, user_id: Optional[str] = None):
# Any application service "interested" in an alias they are regexing on
# can modify the alias.
# Users can only modify the alias if ALL the interested services have
@ -360,22 +373,42 @@ class DirectoryHandler(BaseHandler):
return defer.succeed(True)
@defer.inlineCallbacks
def _user_can_delete_alias(self, alias, user_id):
def _user_can_delete_alias(self, alias: RoomAlias, user_id: str):
"""Determine whether a user can delete an alias.
One of the following must be true:
1. The user created the alias.
2. The user is a server administrator.
3. The user has a power-level sufficient to send a canonical alias event
for the current room.
"""
creator = yield self.store.get_room_alias_creator(alias.to_string())
if creator is not None and creator == user_id:
return True
is_admin = yield self.auth.is_server_admin(UserID.from_string(user_id))
return is_admin
# Resolve the alias to the corresponding room.
room_mapping = yield self.get_association(alias)
room_id = room_mapping["room_id"]
if not room_id:
return False
res = yield self.auth.check_can_change_room_list(
room_id, UserID.from_string(user_id)
)
return res
@defer.inlineCallbacks
def edit_published_room_list(self, requester, room_id, visibility):
def edit_published_room_list(
self, requester: Requester, room_id: str, visibility: str
):
"""Edit the entry of the room in the published room list.
requester
room_id (str)
visibility (str): "public" or "private"
room_id
visibility: "public" or "private"
"""
user_id = requester.user.to_string()
@ -400,7 +433,15 @@ class DirectoryHandler(BaseHandler):
if room is None:
raise SynapseError(400, "Unknown room")
yield self.auth.check_can_change_room_list(room_id, requester.user)
can_change_room_list = yield self.auth.check_can_change_room_list(
room_id, requester.user
)
if not can_change_room_list:
raise AuthError(
403,
"This server requires you to be a moderator in the room to"
" edit its room list entry",
)
making_public = visibility == "public"
if making_public:
@ -421,16 +462,16 @@ class DirectoryHandler(BaseHandler):
@defer.inlineCallbacks
def edit_published_appservice_room_list(
self, appservice_id, network_id, room_id, visibility
self, appservice_id: str, network_id: str, room_id: str, visibility: str
):
"""Add or remove a room from the appservice/network specific public
room list.
Args:
appservice_id (str): ID of the appservice that owns the list
network_id (str): The ID of the network the list is associated with
room_id (str)
visibility (str): either "public" or "private"
appservice_id: ID of the appservice that owns the list
network_id: The ID of the network the list is associated with
room_id
visibility: either "public" or "private"
"""
if visibility not in ["public", "private"]:
raise SynapseError(400, "Invalid visibility setting")

148
tests/handlers/test_directory.py
View File

@ -18,6 +18,7 @@ from mock import Mock
from twisted.internet import defer
import synapse
import synapse.api.errors
from synapse.api.constants import EventTypes
from synapse.config.room_directory import RoomDirectoryConfig
@ -87,40 +88,6 @@ class DirectoryTestCase(unittest.HomeserverTestCase):
ignore_backoff=True,
)
def test_delete_alias_not_allowed(self):
"""Removing an alias should be denied if a user does not have the proper permissions."""
room_id = "!8765qwer:test"
self.get_success(
self.store.create_room_alias_association(self.my_room, room_id, ["test"])
)
self.get_failure(
self.handler.delete_association(
create_requester("@user:test"), self.my_room
),
synapse.api.errors.AuthError,
)
def test_delete_alias(self):
"""Removing an alias should work when a user does has the proper permissions."""
room_id = "!8765qwer:test"
user_id = "@user:test"
self.get_success(
self.store.create_room_alias_association(
self.my_room, room_id, ["test"], user_id
)
)
result = self.get_success(
self.handler.delete_association(create_requester(user_id), self.my_room)
)
self.assertEquals(room_id, result)
# The alias should not be found.
self.get_failure(
self.handler.get_association(self.my_room), synapse.api.errors.SynapseError
)
def test_incoming_fed_query(self):
self.get_success(
self.store.create_room_alias_association(
@ -135,6 +102,119 @@ class DirectoryTestCase(unittest.HomeserverTestCase):
self.assertEquals({"room_id": "!8765asdf:test", "servers": ["test"]}, response)
class TestDeleteAlias(unittest.HomeserverTestCase):
servlets = [
synapse.rest.admin.register_servlets,
login.register_servlets,
room.register_servlets,
directory.register_servlets,
]
def prepare(self, reactor, clock, hs):
self.store = hs.get_datastore()
self.handler = hs.get_handlers().directory_handler
self.state_handler = hs.get_state_handler()
# Create user
self.admin_user = self.register_user("admin", "pass", admin=True)
self.admin_user_tok = self.login("admin", "pass")
# Create a test room
self.room_id = self.helper.create_room_as(
self.admin_user, tok=self.admin_user_tok
)
self.test_alias = "#test:test"
self.room_alias = RoomAlias.from_string(self.test_alias)
# Create a test user.
self.test_user = self.register_user("user", "pass", admin=False)
self.test_user_tok = self.login("user", "pass")
self.helper.join(room=self.room_id, user=self.test_user, tok=self.test_user_tok)
def _create_alias(self, user):
# Create a new alias to this room.
self.get_success(
self.store.create_room_alias_association(
self.room_alias, self.room_id, ["test"], user
)
)
def test_delete_alias_not_allowed(self):
"""A user that doesn't meet the expected guidelines cannot delete an alias."""
self._create_alias(self.admin_user)
self.get_failure(
self.handler.delete_association(
create_requester(self.test_user), self.room_alias
),
synapse.api.errors.AuthError,
)
def test_delete_alias_creator(self):
"""An alias creator can delete their own alias."""
# Create an alias from a different user.
self._create_alias(self.test_user)
# Delete the user's alias.
result = self.get_success(
self.handler.delete_association(
create_requester(self.test_user), self.room_alias
)
)
self.assertEquals(self.room_id, result)
# Confirm the alias is gone.
self.get_failure(
self.handler.get_association(self.room_alias),
synapse.api.errors.SynapseError,
)
def test_delete_alias_admin(self):
"""A server admin can delete an alias created by another user."""
# Create an alias from a different user.
self._create_alias(self.test_user)
# Delete the user's alias as the admin.
result = self.get_success(
self.handler.delete_association(
create_requester(self.admin_user), self.room_alias
)
)
self.assertEquals(self.room_id, result)
# Confirm the alias is gone.
self.get_failure(
self.handler.get_association(self.room_alias),
synapse.api.errors.SynapseError,
)
def test_delete_alias_sufficient_power(self):
"""A user with a sufficient power level should be able to delete an alias."""
self._create_alias(self.admin_user)
# Increase the user's power level.
self.helper.send_state(
self.room_id,
"m.room.power_levels",
{"users": {self.test_user: 100}},
tok=self.admin_user_tok,
)
# They can now delete the alias.
result = self.get_success(
self.handler.delete_association(
create_requester(self.test_user), self.room_alias
)
)
self.assertEquals(self.room_id, result)
# Confirm the alias is gone.
self.get_failure(
self.handler.get_association(self.room_alias),
synapse.api.errors.SynapseError,
)
class CanonicalAliasTestCase(unittest.HomeserverTestCase):
"""Test modifications of the canonical alias when delete aliases.
"""

1
tox.ini
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@ -185,6 +185,7 @@ commands = mypy \
synapse/federation/federation_client.py \
synapse/federation/sender \
synapse/federation/transport \
synapse/handlers/directory.py \
synapse/handlers/presence.py \
synapse/handlers/sync.py \
synapse/handlers/ui_auth \