1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <string>
20 
21 #include "apex_file.h"
22 
23 namespace android {
24 namespace apex {
25 
26 enum PrepareHashTreeResult {
27   kReuse = 0,
28   KRegenerate = 1,
29 };
30 
31 // Generates a dm-verity hashtree of a given |apex| if |hashtree_file| doesn't
32 // exist or it's root_digest doesn't match |verity_data.root_digest|. Otherwise
33 // does nothing.
34 android::base::Result<PrepareHashTreeResult> PrepareHashTree(
35     const ApexFile& apex, const ApexVerityData& verity_data,
36     const std::string& hashtree_file);
37 
38 void RemoveObsoleteHashTrees();
39 
40 }  // namespace apex
41 }  // namespace android
42