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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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.
*/
package com.android.server.backup.encryption.client;
import com.android.server.backup.encryption.protos.nano.WrappedKeyProto;
import java.util.Map;
/**
* Contains methods for communicating with the parts of the backup server relevant to encryption.
*/
public interface CryptoBackupServer {
/**
* Uploads an incremental backup to the server.
*
* <p>Handles setting up and tearing down the connection.
*
* @param packageName the package to associate the data with
* @param oldDocId the id of the previous backup doc in Drive
* @param diffScript containing the actual backup data
* @param tertiaryKey the wrapped key used to encrypt this backup
* @return the id of the new backup doc in Drive.
*/
String uploadIncrementalBackup(
String packageName,
String oldDocId,
byte[] diffScript,
WrappedKeyProto.WrappedKey tertiaryKey);
/**
* Uploads non-incremental backup to the server.
*
* <p>Handles setting up and tearing down the connection.
*
* @param packageName the package to associate the data with
* @param data the actual backup data
* @param tertiaryKey the wrapped key used to encrypt this backup
* @return the id of the new backup doc in Drive.
*/
String uploadNonIncrementalBackup(
String packageName, byte[] data, WrappedKeyProto.WrappedKey tertiaryKey);
/**
* Sets the alias of the active secondary key. This is the alias used to refer to the key in the
* {@link java.security.KeyStore}. It is also used to key storage for tertiary keys on the
* backup server. Also has to upload all existing tertiary keys, wrapped with the new key.
*
* @param keyAlias The ID of the secondary key.
* @param tertiaryKeys The tertiary keys, wrapped with the new secondary key.
*/
void setActiveSecondaryKeyAlias(
String keyAlias, Map<String, WrappedKeyProto.WrappedKey> tertiaryKeys);
}
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