• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 #include "fs_avb/types.h"
18 
19 namespace android {
20 namespace fs_mgr {
21 
22 // Helper functions to print enum class VBMetaVerifyResult.
VBMetaVerifyResultToString(VBMetaVerifyResult result)23 const char* VBMetaVerifyResultToString(VBMetaVerifyResult result) {
24     // clang-format off
25     static const char* const name[] = {
26         "ResultSuccess",
27         "ResultError",
28         "ResultErrorVerification",
29         "ResultUnknown",
30     };
31     // clang-format on
32 
33     uint32_t index = static_cast<uint32_t>(result);
34     uint32_t unknown_index = sizeof(name) / sizeof(char*) - 1;
35     if (index >= unknown_index) {
36         index = unknown_index;
37     }
38 
39     return name[index];
40 }
41 
operator <<(std::ostream & os,VBMetaVerifyResult result)42 std::ostream& operator<<(std::ostream& os, VBMetaVerifyResult result) {
43     os << VBMetaVerifyResultToString(result);
44     return os;
45 }
46 
47 // Helper functions to dump enum class AvbHandleStatus.
AvbHandleStatusToString(AvbHandleStatus status)48 const char* AvbHandleStatusToString(AvbHandleStatus status) {
49     // clang-format off
50     static const char* const name[] = {
51         "Success",
52         "Uninitialized",
53         "HashtreeDisabled",
54         "VerificationDisabled",
55         "VerificationError",
56         "Unknown",
57     };
58     // clang-format on
59 
60     uint32_t index = static_cast<uint32_t>(status);
61     uint32_t unknown_index = sizeof(name) / sizeof(char*) - 1;
62     if (index >= unknown_index) {
63         index = unknown_index;
64     }
65 
66     return name[index];
67 }
68 
operator <<(std::ostream & os,AvbHandleStatus status)69 std::ostream& operator<<(std::ostream& os, AvbHandleStatus status) {
70     os << AvbHandleStatusToString(status);
71     return os;
72 }
73 
74 // class VBMetaData
75 // ----------------
GetVBMetaHeader(bool update_vbmeta_size)76 std::unique_ptr<AvbVBMetaImageHeader> VBMetaData::GetVBMetaHeader(bool update_vbmeta_size) {
77     auto vbmeta_header = std::make_unique<AvbVBMetaImageHeader>();
78 
79     if (!vbmeta_header) return nullptr;
80 
81     /* Byteswap the header. */
82     avb_vbmeta_image_header_to_host_byte_order((AvbVBMetaImageHeader*)vbmeta_ptr_.get(),
83                                                vbmeta_header.get());
84     if (update_vbmeta_size) {
85         vbmeta_size_ = sizeof(AvbVBMetaImageHeader) +
86                        vbmeta_header->authentication_data_block_size +
87                        vbmeta_header->auxiliary_data_block_size;
88     }
89 
90     return vbmeta_header;
91 }
92 
93 }  // namespace fs_mgr
94 }  // namespace android
95