diff options
| -rw-r--r-- | changelog.d/7037.feature | 1 | ||||
| -rw-r--r-- | synapse/api/room_versions.py | 9 | ||||
| -rw-r--r-- | synapse/crypto/event_signing.py | 2 | ||||
| -rw-r--r-- | synapse/event_auth.py | 8 | ||||
| -rw-r--r-- | synapse/events/utils.py | 12 | ||||
| -rw-r--r-- | synapse/storage/data_stores/main/events.py | 10 | ||||
| -rw-r--r-- | tests/events/test_utils.py | 35 | ||||
| -rw-r--r-- | tests/test_event_auth.py | 93 |
8 files changed, 148 insertions, 22 deletions
diff --git a/changelog.d/7037.feature b/changelog.d/7037.feature new file mode 100644 index 0000000000..4bc1b3b19f --- /dev/null +++ b/changelog.d/7037.feature @@ -0,0 +1 @@ +Implement updated authorization rules and redaction rules for aliases events, from [MSC2261](https://github.com/matrix-org/matrix-doc/pull/2261) and [MSC2432](https://github.com/matrix-org/matrix-doc/pull/2432). diff --git a/synapse/api/room_versions.py b/synapse/api/room_versions.py index cf7ee60d3a..871179749a 100644 --- a/synapse/api/room_versions.py +++ b/synapse/api/room_versions.py @@ -57,7 +57,7 @@ class RoomVersion(object): state_res = attr.ib() # int; one of the StateResolutionVersions enforce_key_validity = attr.ib() # bool - # bool: before MSC2260, anyone was allowed to send an aliases event + # bool: before MSC2261/MSC2432, m.room.aliases had special auth rules and redaction rules special_case_aliases_auth = attr.ib(type=bool, default=False) @@ -102,12 +102,13 @@ class RoomVersions(object): enforce_key_validity=True, special_case_aliases_auth=True, ) - MSC2260_DEV = RoomVersion( - "org.matrix.msc2260", + MSC2432_DEV = RoomVersion( + "org.matrix.msc2432", RoomDisposition.UNSTABLE, EventFormatVersions.V3, StateResolutionVersions.V2, enforce_key_validity=True, + special_case_aliases_auth=False, ) @@ -119,6 +120,6 @@ KNOWN_ROOM_VERSIONS = { RoomVersions.V3, RoomVersions.V4, RoomVersions.V5, - RoomVersions.MSC2260_DEV, + RoomVersions.MSC2432_DEV, ) } # type: Dict[str, RoomVersion] diff --git a/synapse/crypto/event_signing.py b/synapse/crypto/event_signing.py index 5f733c1cf5..0422c43fab 100644 --- a/synapse/crypto/event_signing.py +++ b/synapse/crypto/event_signing.py @@ -140,7 +140,7 @@ def compute_event_signature( Returns: a dictionary in the same format of an event's signatures field. """ - redact_json = prune_event_dict(event_dict) + redact_json = prune_event_dict(room_version, event_dict) redact_json.pop("age_ts", None) redact_json.pop("unsigned", None) if logger.isEnabledFor(logging.DEBUG): diff --git a/synapse/event_auth.py b/synapse/event_auth.py index 472f165044..46beb5334f 100644 --- a/synapse/event_auth.py +++ b/synapse/event_auth.py @@ -137,7 +137,7 @@ def check( raise AuthError(403, "This room has been marked as unfederatable.") # 4. If type is m.room.aliases - if event.type == EventTypes.Aliases: + if event.type == EventTypes.Aliases and room_version_obj.special_case_aliases_auth: # 4a. If event has no state_key, reject if not event.is_state(): raise AuthError(403, "Alias event must be a state event") @@ -152,10 +152,8 @@ def check( ) # 4c. Otherwise, allow. - # This is removed by https://github.com/matrix-org/matrix-doc/pull/2260 - if room_version_obj.special_case_aliases_auth: - logger.debug("Allowing! %s", event) - return + logger.debug("Allowing! %s", event) + return if logger.isEnabledFor(logging.DEBUG): logger.debug("Auth events: %s", [a.event_id for a in auth_events.values()]) diff --git a/synapse/events/utils.py b/synapse/events/utils.py index bc6f98ae3b..b75b097e5e 100644 --- a/synapse/events/utils.py +++ b/synapse/events/utils.py @@ -23,6 +23,7 @@ from frozendict import frozendict from twisted.internet import defer from synapse.api.constants import EventTypes, RelationTypes +from synapse.api.room_versions import RoomVersion from synapse.util.async_helpers import yieldable_gather_results from . import EventBase @@ -43,7 +44,7 @@ def prune_event(event: EventBase) -> EventBase: the user has specified, but we do want to keep necessary information like type, state_key etc. """ - pruned_event_dict = prune_event_dict(event.get_dict()) + pruned_event_dict = prune_event_dict(event.room_version, event.get_dict()) from . import make_event_from_dict @@ -57,15 +58,12 @@ def prune_event(event: EventBase) -> EventBase: return pruned_event -def prune_event_dict(event_dict): +def prune_event_dict(room_version: RoomVersion, event_dict: dict) -> dict: """Redacts the event_dict in the same way as `prune_event`, except it operates on dicts rather than event objects - Args: - event_dict (dict) - Returns: - dict: A copy of the pruned event dict + A copy of the pruned event dict """ allowed_keys = [ @@ -112,7 +110,7 @@ def prune_event_dict(event_dict): "kick", "redact", ) - elif event_type == EventTypes.Aliases: + elif event_type == EventTypes.Aliases and room_version.special_case_aliases_auth: add_fields("aliases") elif event_type == EventTypes.RoomHistoryVisibility: add_fields("history_visibility") diff --git a/synapse/storage/data_stores/main/events.py b/synapse/storage/data_stores/main/events.py index 8ae23df00a..d593ef47b8 100644 --- a/synapse/storage/data_stores/main/events.py +++ b/synapse/storage/data_stores/main/events.py @@ -1168,7 +1168,11 @@ class EventsStore( and original_event.internal_metadata.is_redacted() ): # Redaction was allowed - pruned_json = encode_json(prune_event_dict(original_event.get_dict())) + pruned_json = encode_json( + prune_event_dict( + original_event.room_version, original_event.get_dict() + ) + ) else: # Redaction wasn't allowed pruned_json = None @@ -1929,7 +1933,9 @@ class EventsStore( return # Prune the event's dict then convert it to JSON. - pruned_json = encode_json(prune_event_dict(event.get_dict())) + pruned_json = encode_json( + prune_event_dict(event.room_version, event.get_dict()) + ) # Update the event_json table to replace the event's JSON with the pruned # JSON. diff --git a/tests/events/test_utils.py b/tests/events/test_utils.py index 45d55b9e94..ab5f5ac549 100644 --- a/tests/events/test_utils.py +++ b/tests/events/test_utils.py @@ -13,6 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. +from synapse.api.room_versions import RoomVersions from synapse.events import make_event_from_dict from synapse.events.utils import ( copy_power_levels_contents, @@ -36,9 +37,9 @@ class PruneEventTestCase(unittest.TestCase): """ Asserts that a new event constructed with `evdict` will look like `matchdict` when it is redacted. """ - def run_test(self, evdict, matchdict): + def run_test(self, evdict, matchdict, **kwargs): self.assertEquals( - prune_event(make_event_from_dict(evdict)).get_dict(), matchdict + prune_event(make_event_from_dict(evdict, **kwargs)).get_dict(), matchdict ) def test_minimal(self): @@ -128,6 +129,36 @@ class PruneEventTestCase(unittest.TestCase): }, ) + def test_alias_event(self): + """Alias events have special behavior up through room version 6.""" + self.run_test( + { + "type": "m.room.aliases", + "event_id": "$test:domain", + "content": {"aliases": ["test"]}, + }, + { + "type": "m.room.aliases", + "event_id": "$test:domain", + "content": {"aliases": ["test"]}, + "signatures": {}, + "unsigned": {}, + }, + ) + + def test_msc2432_alias_event(self): + """After MSC2432, alias events have no special behavior.""" + self.run_test( + {"type": "m.room.aliases", "content": {"aliases": ["test"]}}, + { + "type": "m.room.aliases", + "content": {}, + "signatures": {}, + "unsigned": {}, + }, + room_version=RoomVersions.MSC2432_DEV, + ) + class SerializeEventTestCase(unittest.TestCase): def serialize(self, ev, fields): diff --git a/tests/test_event_auth.py b/tests/test_event_auth.py index bfa5d6f510..6c2351cf55 100644 --- a/tests/test_event_auth.py +++ b/tests/test_event_auth.py @@ -19,6 +19,7 @@ from synapse import event_auth from synapse.api.errors import AuthError from synapse.api.room_versions import RoomVersions from synapse.events import make_event_from_dict +from synapse.types import get_domain_from_id class EventAuthTestCase(unittest.TestCase): @@ -51,7 +52,7 @@ class EventAuthTestCase(unittest.TestCase): _random_state_event(joiner), auth_events, do_sig_check=False, - ), + ) def test_state_default_level(self): """ @@ -87,6 +88,83 @@ class EventAuthTestCase(unittest.TestCase): RoomVersions.V1, _random_state_event(king), auth_events, do_sig_check=False, ) + def test_alias_event(self): + """Alias events have special behavior up through room version 6.""" + creator = "@creator:example.com" + other = "@other:example.com" + auth_events = { + ("m.room.create", ""): _create_event(creator), + ("m.room.member", creator): _join_event(creator), + } + + # creator should be able to send aliases + event_auth.check( + RoomVersions.V1, _alias_event(creator), auth_events, do_sig_check=False, + ) + + # Reject an event with no state key. + with self.assertRaises(AuthError): + event_auth.check( + RoomVersions.V1, + _alias_event(creator, state_key=""), + auth_events, + do_sig_check=False, + ) + + # If the domain of the sender does not match the state key, reject. + with self.assertRaises(AuthError): + event_auth.check( + RoomVersions.V1, + _alias_event(creator, state_key="test.com"), + auth_events, + do_sig_check=False, + ) + + # Note that the member does *not* need to be in the room. + event_auth.check( + RoomVersions.V1, _alias_event(other), auth_events, do_sig_check=False, + ) + + def test_msc2432_alias_event(self): + """After MSC2432, alias events have no special behavior.""" + creator = "@creator:example.com" + other = "@other:example.com" + auth_events = { + ("m.room.create", ""): _create_event(creator), + ("m.room.member", creator): _join_event(creator), + } + + # creator should be able to send aliases + event_auth.check( + RoomVersions.MSC2432_DEV, + _alias_event(creator), + auth_events, + do_sig_check=False, + ) + + # No particular checks are done on the state key. + event_auth.check( + RoomVersions.MSC2432_DEV, + _alias_event(creator, state_key=""), + auth_events, + do_sig_check=False, + ) + event_auth.check( + RoomVersions.MSC2432_DEV, + _alias_event(creator, state_key="test.com"), + auth_events, + do_sig_check=False, + ) + + # Per standard auth rules, the member must be in the room. + with self.assertRaises(AuthError): + event_auth.check( + RoomVersions.MSC2432_DEV, + _alias_event(other), + auth_events, + do_sig_check=False, + ) + # helpers for making events @@ -131,6 +209,19 @@ def _power_levels_event(sender, content): ) +def _alias_event(sender, **kwargs): + data = { + "room_id": TEST_ROOM_ID, + "event_id": _get_event_id(), + "type": "m.room.aliases", + "sender": sender, + "state_key": get_domain_from_id(sender), + "content": {"aliases": []}, + } + data.update(**kwargs) + return make_event_from_dict(data) + + def _random_state_event(sender): return make_event_from_dict( { |