140 lines
5.0 KiB
Python
140 lines
5.0 KiB
Python
# Copyright 2023 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Dict
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from twisted.test.proto_helpers import MemoryReactor
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from twisted.web.resource import Resource
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from synapse.media._base import FileInfo
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from synapse.server import HomeServer
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from synapse.util import Clock
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from tests import unittest
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from tests.test_utils import SMALL_PNG
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from tests.unittest import override_config
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class MediaDomainBlockingTests(unittest.HomeserverTestCase):
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remote_media_id = "doesnotmatter"
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remote_server_name = "evil.com"
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.store = hs.get_datastores().main
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# Inject a piece of media. We'll use this to ensure we're returning a sane
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# response when we're not supposed to block it, distinguishing a media block
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# from a regular 404.
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file_id = "abcdefg12345"
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file_info = FileInfo(server_name=self.remote_server_name, file_id=file_id)
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with hs.get_media_repository().media_storage.store_into_file(file_info) as (
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f,
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fname,
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finish,
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):
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f.write(SMALL_PNG)
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self.get_success(finish())
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self.get_success(
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self.store.store_cached_remote_media(
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origin=self.remote_server_name,
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media_id=self.remote_media_id,
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media_type="image/png",
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media_length=1,
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time_now_ms=clock.time_msec(),
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upload_name="test.png",
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filesystem_id=file_id,
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)
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)
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def create_resource_dict(self) -> Dict[str, Resource]:
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# We need to manually set the resource tree to include media, the
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# default only does `/_matrix/client` APIs.
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return {"/_matrix/media": self.hs.get_media_repository_resource()}
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@override_config(
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{
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# Disable downloads from the domain we'll be trying to download from.
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# Should result in a 404.
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"prevent_media_downloads_from": ["evil.com"]
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}
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)
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def test_cannot_download_blocked_media(self) -> None:
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"""
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Tests to ensure that remote media which is blocked cannot be downloaded.
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"""
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response = self.make_request(
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"GET",
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f"/_matrix/media/v3/download/evil.com/{self.remote_media_id}",
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shorthand=False,
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)
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self.assertEqual(response.code, 404)
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@override_config(
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{
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# Disable downloads from a domain we won't be requesting downloads from.
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# This proves we haven't broken anything.
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"prevent_media_downloads_from": ["not-listed.com"]
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}
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)
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def test_remote_media_normally_unblocked(self) -> None:
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"""
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Tests to ensure that remote media is normally able to be downloaded
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when no domain block is in place.
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"""
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response = self.make_request(
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"GET",
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f"/_matrix/media/v3/download/evil.com/{self.remote_media_id}",
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shorthand=False,
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)
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self.assertEqual(response.code, 200)
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@override_config(
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{
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# Disable downloads from the domain we'll be trying to download from.
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# Should result in a 404.
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"prevent_media_downloads_from": ["evil.com"],
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"dynamic_thumbnails": True,
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}
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)
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def test_cannot_download_blocked_media_thumbnail(self) -> None:
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"""
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Same test as test_cannot_download_blocked_media but for thumbnails.
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"""
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response = self.make_request(
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"GET",
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f"/_matrix/media/v3/thumbnail/evil.com/{self.remote_media_id}?width=100&height=100",
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shorthand=False,
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content={"width": 100, "height": 100},
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)
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self.assertEqual(response.code, 404)
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@override_config(
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{
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# Disable downloads from a domain we won't be requesting downloads from.
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# This proves we haven't broken anything.
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"prevent_media_downloads_from": ["not-listed.com"],
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"dynamic_thumbnails": True,
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}
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)
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def test_remote_media_thumbnail_normally_unblocked(self) -> None:
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"""
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Same test as test_remote_media_normally_unblocked but for thumbnails.
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"""
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response = self.make_request(
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"GET",
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f"/_matrix/media/v3/thumbnail/evil.com/{self.remote_media_id}?width=100&height=100",
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shorthand=False,
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)
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self.assertEqual(response.code, 200)
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