Configurable limits on avatars (#11846)

Only allow files which file size and content types match configured
limits to be set as avatar.

Most of the inspiration from the non-test code comes from matrix-org/synapse-dinsic#19

1 files changed, 14 insertions, 0 deletions

diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml

index abf28e4490..689b207fc0 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -471,6 +471,20 @@ limit_remote_rooms:
 #
 #allow_per_room_profiles: false
 
+# The largest allowed file size for a user avatar. Defaults to no restriction.
+#
+# Note that user avatar changes will not work if this is set without
+# using Synapse's media repository.
+#
+#max_avatar_size: 10M
+
+# The MIME types allowed for user avatars. Defaults to no restriction.
+#
+# Note that user avatar changes will not work if this is set without
+# using Synapse's media repository.
+#
+#allowed_avatar_mimetypes: ["image/png", "image/jpeg", "image/gif"]
+
 # How long to keep redacted events in unredacted form in the database. After
 # this period redacted events get replaced with their redacted form in the DB.
 #