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# Copyright 2021 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import synapse.rest.admin
from synapse.rest.client import login, room
from synapse.storage.engines import PostgresEngine
from tests.unittest import HomeserverTestCase
class NullByteInsertionTest(HomeserverTestCase):
servlets = [
synapse.rest.admin.register_servlets_for_client_rest_resource,
login.register_servlets,
room.register_servlets,
]
def test_null_byte(self):
"""
Postgres/SQLite don't like null bytes going into the search tables. Internally
we replace those with a space.
Ensure this doesn't break anything.
"""
# Register a user and create a room, create some messages
self.register_user("alice", "password")
access_token = self.login("alice", "password")
room_id = self.helper.create_room_as("alice", tok=access_token)
# Send messages and ensure they don't cause an internal server
# error
for body in ["hi\u0000bob", "another message", "hi alice"]:
response = self.helper.send(room_id, body, tok=access_token)
self.assertIn("event_id", response)
# Check that search works for the message where the null byte was replaced
store = self.hs.get_datastore()
result = self.get_success(
store.search_msgs([room_id], "hi bob", ["content.body"])
)
self.assertEquals(result.get("count"), 1)
if isinstance(store.database_engine, PostgresEngine):
self.assertIn("hi", result.get("highlights"))
self.assertIn("bob", result.get("highlights"))
# Check that search works for an unrelated message
result = self.get_success(
store.search_msgs([room_id], "another", ["content.body"])
)
self.assertEquals(result.get("count"), 1)
if isinstance(store.database_engine, PostgresEngine):
self.assertIn("another", result.get("highlights"))
# Check that search works for a search term that overlaps with the message
# containing a null byte and an unrelated message.
result = self.get_success(store.search_msgs([room_id], "hi", ["content.body"]))
self.assertEquals(result.get("count"), 2)
result = self.get_success(
store.search_msgs([room_id], "hi alice", ["content.body"])
)
if isinstance(store.database_engine, PostgresEngine):
self.assertIn("alice", result.get("highlights"))
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