1 files changed, 22 insertions, 1 deletions
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index b1999d051b..c9b9e7f5ff 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -19,6 +19,7 @@
 import logging
 import re
 
+from synapse.api.constants import RoomCreationPreset
 from synapse.http.servlet import RestServlet
 
 logger = logging.getLogger(__name__)
@@ -28,9 +29,23 @@ class VersionsRestServlet(RestServlet):
     PATTERNS = [re.compile("^/_matrix/client/versions$")]
 
     def __init__(self, hs):
-        super(VersionsRestServlet, self).__init__()
+        super().__init__()
         self.config = hs.config
 
+        # Calculate these once since they shouldn't change after start-up.
+        self.e2ee_forced_public = (
+            RoomCreationPreset.PUBLIC_CHAT
+            in self.config.encryption_enabled_by_default_for_room_presets
+        )
+        self.e2ee_forced_private = (
+            RoomCreationPreset.PRIVATE_CHAT
+            in self.config.encryption_enabled_by_default_for_room_presets
+        )
+        self.e2ee_forced_trusted_private = (
+            RoomCreationPreset.TRUSTED_PRIVATE_CHAT
+            in self.config.encryption_enabled_by_default_for_room_presets
+        )
+
     def on_GET(self, request):
         return (
             200,
@@ -63,6 +78,12 @@ class VersionsRestServlet(RestServlet):
                     # Tchap does not currently assume this rule for r0.5.0
                     # XXX: Remove this when it does
                     "m.lazy_load_members": True,
+                    # Implements additional endpoints as described in MSC2666
+                    "uk.half-shot.msc2666": True,
+                    # Whether new rooms will be set to encrypted or not (based on presets).
+                    "io.element.e2ee_forced.public": self.e2ee_forced_public,
+                    "io.element.e2ee_forced.private": self.e2ee_forced_private,
+                    "io.element.e2ee_forced.trusted_private": self.e2ee_forced_trusted_private,
                 },
             },
         )