28 lines
939 B
Swift
28 lines
939 B
Swift
//
|
|
// Copyright 2024 Signal Messenger, LLC
|
|
// SPDX-License-Identifier: AGPL-3.0-only
|
|
//
|
|
|
|
import Foundation
|
|
import LibSignalClient
|
|
|
|
enum MessageBackupKeyMaterialError: Error {
|
|
case invalidKeyInfo
|
|
case missingMasterKey
|
|
case notRegistered
|
|
case invalidEncryptionKey
|
|
}
|
|
|
|
public protocol MessageBackupKeyMaterial {
|
|
|
|
/// Backup ID material derived from a combination of the backup key and the
|
|
/// local ACI. This ID is used both as the salt for the backup encryption and
|
|
/// to create the anonymous credentials for interacting with server stored backups
|
|
func backupID(tx: DBReadTransaction) throws -> Data
|
|
|
|
/// Builds an encrypting StreamTransform object derived from the backup master key and the backupID
|
|
func createEncryptingStreamTransform(tx: DBReadTransaction) throws -> EncryptingStreamTransform
|
|
|
|
func createDecryptingStreamTransform(tx: DBReadTransaction) throws -> DecryptingStreamTransform
|
|
}
|