4 files changed, 24 insertions, 8 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 2cbfab2569..8b1277ad02 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -33,6 +33,7 @@ from synapse.api.errors import (
     MissingClientTokenError,
     ResourceLimitError,
 )
+from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.config.server import is_threepid_reserved
 from synapse.types import StateMap, UserID
 from synapse.util.caches import CACHE_SIZE_FACTOR, register_cache
@@ -77,15 +78,17 @@ class Auth(object):
         self._account_validity = hs.config.account_validity
 
     @defer.inlineCallbacks
-    def check_from_context(self, room_version, event, context, do_sig_check=True):
+    def check_from_context(self, room_version: str, event, context, do_sig_check=True):
         prev_state_ids = yield context.get_prev_state_ids()
         auth_events_ids = yield self.compute_auth_events(
             event, prev_state_ids, for_verification=True
         )
         auth_events = yield self.store.get_events(auth_events_ids)
         auth_events = {(e.type, e.state_key): e for e in itervalues(auth_events)}
+
+        room_version_obj = KNOWN_ROOM_VERSIONS[room_version]
         event_auth.check(
-            room_version, event, auth_events=auth_events, do_sig_check=do_sig_check
+            room_version_obj, event, auth_events=auth_events, do_sig_check=do_sig_check
         )
 
     @defer.inlineCallbacks
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 0ade47e624..cc8577552b 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -77,12 +77,11 @@ class EventTypes(object):
     Aliases = "m.room.aliases"
     Redaction = "m.room.redaction"
     ThirdPartyInvite = "m.room.third_party_invite"
-    Encryption = "m.room.encryption"
     RelatedGroups = "m.room.related_groups"
 
     RoomHistoryVisibility = "m.room.history_visibility"
     CanonicalAlias = "m.room.canonical_alias"
-    Encryption = "m.room.encryption"
+    Encrypted = "m.room.encrypted"
     RoomAvatar = "m.room.avatar"
     RoomEncryption = "m.room.encryption"
     GuestAccess = "m.room.guest_access"
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index 1c9456e583..0c20601600 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -402,11 +402,9 @@ class UnsupportedRoomVersionError(SynapseError):
     """The client's request to create a room used a room version that the server does
     not support."""
 
-    def __init__(self):
+    def __init__(self, msg="Homeserver does not support this room version"):
         super(UnsupportedRoomVersionError, self).__init__(
-            code=400,
-            msg="Homeserver does not support this room version",
-            errcode=Codes.UNSUPPORTED_ROOM_VERSION,
+            code=400, msg=msg, errcode=Codes.UNSUPPORTED_ROOM_VERSION,
         )
 
 
diff --git a/synapse/api/room_versions.py b/synapse/api/room_versions.py
index c6f50fd7b9..cf7ee60d3a 100644
--- a/synapse/api/room_versions.py
+++ b/synapse/api/room_versions.py
@@ -57,6 +57,9 @@ 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
+    special_case_aliases_auth = attr.ib(type=bool, default=False)
+
 
 class RoomVersions(object):
     V1 = RoomVersion(
@@ -65,6 +68,7 @@ class RoomVersions(object):
         EventFormatVersions.V1,
         StateResolutionVersions.V1,
         enforce_key_validity=False,
+        special_case_aliases_auth=True,
     )
     V2 = RoomVersion(
         "2",
@@ -72,6 +76,7 @@ class RoomVersions(object):
         EventFormatVersions.V1,
         StateResolutionVersions.V2,
         enforce_key_validity=False,
+        special_case_aliases_auth=True,
     )
     V3 = RoomVersion(
         "3",
@@ -79,6 +84,7 @@ class RoomVersions(object):
         EventFormatVersions.V2,
         StateResolutionVersions.V2,
         enforce_key_validity=False,
+        special_case_aliases_auth=True,
     )
     V4 = RoomVersion(
         "4",
@@ -86,6 +92,7 @@ class RoomVersions(object):
         EventFormatVersions.V3,
         StateResolutionVersions.V2,
         enforce_key_validity=False,
+        special_case_aliases_auth=True,
     )
     V5 = RoomVersion(
         "5",
@@ -93,6 +100,14 @@ class RoomVersions(object):
         EventFormatVersions.V3,
         StateResolutionVersions.V2,
         enforce_key_validity=True,
+        special_case_aliases_auth=True,
+    )
+    MSC2260_DEV = RoomVersion(
+        "org.matrix.msc2260",
+        RoomDisposition.UNSTABLE,
+        EventFormatVersions.V3,
+        StateResolutionVersions.V2,
+        enforce_key_validity=True,
     )
 
 
@@ -104,5 +119,6 @@ KNOWN_ROOM_VERSIONS = {
         RoomVersions.V3,
         RoomVersions.V4,
         RoomVersions.V5,
+        RoomVersions.MSC2260_DEV,
     )
 }  # type: Dict[str, RoomVersion]