Add Authenticated Media configuration options

roles/custom/matrix-synapse/defaults/main.yml

@@ -981,6 +981,11 @@ matrix_synapse_workers_media_repository_workers_container_arguments: []
 # Adjusting this value manually is generally not necessary.
 matrix_synapse_enable_media_repo: "{{ not matrix_synapse_ext_media_repo_enabled and (not matrix_synapse_workers_enabled or (matrix_synapse_workers_enabled_list | selectattr('type', 'equalto', 'media_repository') | list | length == 0)) }}"
 
+# matrix_synapse_enable_authenticated_media controls if authenticated media is enabled. If enabled all "old" media remains accessible over the legacy endpoints but new media is blocked.
+# while this option is enabled all media access and downloads have to be done via authenticated endpoints.
+# FIX_ME_WHEN_DEFAULT_TRUE: This option is going to become set to default true in Synapse at a later date.
+matrix_synapse_enable_authenticated_media: false
+
 # matrix_synapse_media_instance_running_background_jobs populates the `media_instance_running_background_jobs` Synapse configuration used when Synapse workers are in use (`matrix_synapse_workers_enabled`).
 # `media_instance_running_background_jobs` is meant to point to a single media-repository worker, which is dedicated to running background tasks that maintain the media repository.
 # Multiple `media_repository` workers may be enabled. We always pick the first one as the background tasks worker.

roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -1028,6 +1028,13 @@ federation_rr_transactions_per_room_per_second: {{ matrix_synapse_federation_rr_
 #enable_media_repo: false
 enable_media_repo: {{ matrix_synapse_enable_media_repo | to_json }}
 
+# Enable authenticated media.
+# enable_authenticated_media blocks access to new media from the legacy endpoints
+# and freezes the unauthenticated media repo by blocking all downloads that are not using
+# the new authenticated endpoints. If this option is turned off all media reverts to being considered "old"
+
+enable_authenticated_media: {{ matrix_synapse_enable_authenticated_media | to_json }}
+
 # Directory where uploaded images and attachments are stored.
 #
 media_store_path: "/matrix-media-store-parent/{{ matrix_synapse_media_store_directory_name }}"