From cbd8d83da7d24d7434c749c4c6cfece0c507b0b9 Mon Sep 17 00:00:00 2001 From: Patrick Cloke Date: Mon, 24 Aug 2020 13:58:56 -0400 Subject: Stop shadow-banned users from sending non-member events. (#8142) --- synapse/rest/client/v1/room.py | 74 +++++++++++++--------- synapse/rest/client/v2_alpha/relations.py | 18 ++++-- .../client/v2_alpha/room_upgrade_rest_servlet.py | 14 ++-- 3 files changed, 66 insertions(+), 40 deletions(-) (limited to 'synapse/rest') diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py index a9dd3a6aec..11da8bc037 100644 --- a/synapse/rest/client/v1/room.py +++ b/synapse/rest/client/v1/room.py @@ -201,8 +201,8 @@ class RoomStateEventRestServlet(TransactionRestServlet): if state_key is not None: event_dict["state_key"] = state_key - if event_type == EventTypes.Member: - try: + try: + if event_type == EventTypes.Member: membership = content.get("membership", None) event_id, _ = await self.room_member_handler.update_membership( requester, @@ -211,16 +211,16 @@ class RoomStateEventRestServlet(TransactionRestServlet): action=membership, content=content, ) - except ShadowBanError: - event_id = "$" + random_string(43) - else: - ( - event, - _, - ) = await self.event_creation_handler.create_and_send_nonmember_event( - requester, event_dict, txn_id=txn_id - ) - event_id = event.event_id + else: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, event_dict, txn_id=txn_id + ) + event_id = event.event_id + except ShadowBanError: + event_id = "$" + random_string(43) set_tag("event_id", event_id) ret = {"event_id": event_id} @@ -253,12 +253,19 @@ class RoomSendEventRestServlet(TransactionRestServlet): if b"ts" in request.args and requester.app_service: event_dict["origin_server_ts"] = parse_integer(request, "ts", 0) - event, _ = await self.event_creation_handler.create_and_send_nonmember_event( - requester, event_dict, txn_id=txn_id - ) + try: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, event_dict, txn_id=txn_id + ) + event_id = event.event_id + except ShadowBanError: + event_id = "$" + random_string(43) - set_tag("event_id", event.event_id) - return 200, {"event_id": event.event_id} + set_tag("event_id", event_id) + return 200, {"event_id": event_id} def on_GET(self, request, room_id, event_type, txn_id): return 200, "Not implemented" @@ -799,20 +806,27 @@ class RoomRedactEventRestServlet(TransactionRestServlet): requester = await self.auth.get_user_by_req(request) content = parse_json_object_from_request(request) - event, _ = await self.event_creation_handler.create_and_send_nonmember_event( - requester, - { - "type": EventTypes.Redaction, - "content": content, - "room_id": room_id, - "sender": requester.user.to_string(), - "redacts": event_id, - }, - txn_id=txn_id, - ) + try: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.Redaction, + "content": content, + "room_id": room_id, + "sender": requester.user.to_string(), + "redacts": event_id, + }, + txn_id=txn_id, + ) + event_id = event.event_id + except ShadowBanError: + event_id = "$" + random_string(43) - set_tag("event_id", event.event_id) - return 200, {"event_id": event.event_id} + set_tag("event_id", event_id) + return 200, {"event_id": event_id} def on_PUT(self, request, room_id, event_id, txn_id): set_tag("txn_id", txn_id) diff --git a/synapse/rest/client/v2_alpha/relations.py b/synapse/rest/client/v2_alpha/relations.py index 89002ffbff..e29f49f7f5 100644 --- a/synapse/rest/client/v2_alpha/relations.py +++ b/synapse/rest/client/v2_alpha/relations.py @@ -22,7 +22,7 @@ any time to reflect changes in the MSC. import logging from synapse.api.constants import EventTypes, RelationTypes -from synapse.api.errors import SynapseError +from synapse.api.errors import ShadowBanError, SynapseError from synapse.http.servlet import ( RestServlet, parse_integer, @@ -35,6 +35,7 @@ from synapse.storage.relations import ( PaginationChunk, RelationPaginationToken, ) +from synapse.util.stringutils import random_string from ._base import client_patterns @@ -111,11 +112,18 @@ class RelationSendServlet(RestServlet): "sender": requester.user.to_string(), } - event, _ = await self.event_creation_handler.create_and_send_nonmember_event( - requester, event_dict=event_dict, txn_id=txn_id - ) + try: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, event_dict=event_dict, txn_id=txn_id + ) + event_id = event.event_id + except ShadowBanError: + event_id = "$" + random_string(43) - return 200, {"event_id": event.event_id} + return 200, {"event_id": event_id} class RelationPaginationServlet(RestServlet): diff --git a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py index f357015a70..39a5518614 100644 --- a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py +++ b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py @@ -15,13 +15,14 @@ import logging -from synapse.api.errors import Codes, SynapseError +from synapse.api.errors import Codes, ShadowBanError, SynapseError from synapse.api.room_versions import KNOWN_ROOM_VERSIONS from synapse.http.servlet import ( RestServlet, assert_params_in_dict, parse_json_object_from_request, ) +from synapse.util import stringutils from ._base import client_patterns @@ -62,7 +63,6 @@ class RoomUpgradeRestServlet(RestServlet): content = parse_json_object_from_request(request) assert_params_in_dict(content, ("new_version",)) - new_version = content["new_version"] new_version = KNOWN_ROOM_VERSIONS.get(content["new_version"]) if new_version is None: @@ -72,9 +72,13 @@ class RoomUpgradeRestServlet(RestServlet): Codes.UNSUPPORTED_ROOM_VERSION, ) - new_room_id = await self._room_creation_handler.upgrade_room( - requester, room_id, new_version - ) + try: + new_room_id = await self._room_creation_handler.upgrade_room( + requester, room_id, new_version + ) + except ShadowBanError: + # Generate a random room ID. + new_room_id = stringutils.random_string(18) ret = {"replacement_room": new_room_id} -- cgit 1.4.1