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node_modules/matrix-js-sdk/lib/common-crypto/key-passphrase.js

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+/*
+ * Copyright 2024 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 { deriveRecoveryKeyFromPassphrase } from "../crypto-api/index.js";
+/**
+ * Derive a backup key from a passphrase using the salt and iterations from the auth data.
+ * @param authData - The auth data containing the salt and iterations
+ * @param passphrase - The passphrase to derive the key from
+ * @deprecated Deriving a backup key from a passphrase is not part of the matrix spec. Instead, a random key is generated and stored/shared via 4S.
+ */
+export function keyFromAuthData(authData, passphrase) {
+  if (!authData.private_key_salt || !authData.private_key_iterations) {
+    throw new Error("Salt and/or iterations not found: this backup cannot be restored with a passphrase");
+  }
+  return deriveRecoveryKeyFromPassphrase(passphrase, authData.private_key_salt, authData.private_key_iterations, authData.private_key_bits);
+}
+//# sourceMappingURL=key-passphrase.js.map