Merge pull request #5130 from matrix-org/jryans/secure-backup-required

Enforce Secure Backup completion when requested by HS

src/utils/WellKnownUtils.ts

@@ -0,0 +1,40 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {MatrixClientPeg} from '../MatrixClientPeg';
+
+const E2EE_WK_KEY = "io.element.e2ee";
+const E2EE_WK_KEY_DEPRECATED = "im.vector.riot.e2ee";
+
+export interface IE2EEWellKnown {
+    default?: boolean;
+}
+
+export function getE2EEWellKnown(): IE2EEWellKnown {
+    const clientWellKnown = MatrixClientPeg.get().getClientWellKnown();
+    if (clientWellKnown && clientWellKnown[E2EE_WK_KEY]) {
+        return clientWellKnown[E2EE_WK_KEY];
+    }
+    if (clientWellKnown && clientWellKnown[E2EE_WK_KEY_DEPRECATED]) {
+        return clientWellKnown[E2EE_WK_KEY_DEPRECATED]
+    }
+    return null;
+}
+
+export function isSecureBackupRequired(): boolean {
+    const wellKnown = getE2EEWellKnown();
+    return wellKnown && wellKnown["secure_backup_required"] === true;
+}