1 //
2 // Copyright 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 "update_engine/payload_generator/payload_properties.h"
18
19 #include <algorithm>
20 #include <string>
21 #include <utility>
22 #include <vector>
23
24 #include <base/json/json_writer.h>
25 #include <base/strings/string_util.h>
26 #include <base/values.h>
27 #include <brillo/data_encoding.h>
28
29 #include "update_engine/common/constants.h"
30 #include "update_engine/common/hash_calculator.h"
31 #include "update_engine/common/utils.h"
32 #include "update_engine/payload_consumer/payload_metadata.h"
33 #include "update_engine/update_metadata.pb.h"
34
35 using std::string;
36 using std::vector;
37
38 namespace chromeos_update_engine {
39
40 namespace {
41 // These ones are needed by the GoldenEye.
42 const char kPayloadPropertyJsonVersion[] = "version";
43 const char kPayloadPropertyJsonPayloadHash[] = "sha256_hex";
44 const char kPayloadPropertyJsonMetadataSize[] = "metadata_size";
45 const char kPayloadPropertyJsonMetadataSignature[] = "metadata_signature";
46
47 // These are needed by the Nebraska and devserver.
48 const char kPayloadPropertyJsonPayloadSize[] = "size";
49 const char kPayloadPropertyJsonIsDelta[] = "is_delta";
50 } // namespace
51
PayloadProperties(const string & payload_path)52 PayloadProperties::PayloadProperties(const string& payload_path)
53 : payload_path_(payload_path) {}
54
GetPropertiesAsJson(string * json_str)55 bool PayloadProperties::GetPropertiesAsJson(string* json_str) {
56 TEST_AND_RETURN_FALSE(LoadFromPayload());
57
58 base::DictionaryValue properties;
59 properties.SetInteger(kPayloadPropertyJsonVersion, version_);
60 properties.SetInteger(kPayloadPropertyJsonMetadataSize, metadata_size_);
61 properties.SetString(kPayloadPropertyJsonMetadataSignature,
62 metadata_signatures_);
63 properties.SetInteger(kPayloadPropertyJsonPayloadSize, payload_size_);
64 properties.SetString(kPayloadPropertyJsonPayloadHash, payload_hash_);
65 properties.SetBoolean(kPayloadPropertyJsonIsDelta, is_delta_);
66
67 return base::JSONWriter::Write(properties, json_str);
68 }
69
GetPropertiesAsKeyValue(string * key_value_str)70 bool PayloadProperties::GetPropertiesAsKeyValue(string* key_value_str) {
71 TEST_AND_RETURN_FALSE(LoadFromPayload());
72
73 brillo::KeyValueStore properties;
74 properties.SetString(kPayloadPropertyFileSize, std::to_string(payload_size_));
75 properties.SetString(kPayloadPropertyMetadataSize,
76 std::to_string(metadata_size_));
77 properties.SetString(kPayloadPropertyFileHash, payload_hash_);
78 properties.SetString(kPayloadPropertyMetadataHash, metadata_hash_);
79
80 *key_value_str = properties.SaveToString();
81 return true;
82 }
83
LoadFromPayload()84 bool PayloadProperties::LoadFromPayload() {
85 PayloadMetadata payload_metadata;
86 DeltaArchiveManifest manifest;
87 Signatures metadata_signatures;
88 TEST_AND_RETURN_FALSE(payload_metadata.ParsePayloadFile(
89 payload_path_, &manifest, &metadata_signatures));
90
91 metadata_size_ = payload_metadata.GetMetadataSize();
92 payload_size_ = utils::FileSize(payload_path_);
93
94 brillo::Blob metadata_hash;
95 TEST_AND_RETURN_FALSE(HashCalculator::RawHashOfFile(
96 payload_path_, metadata_size_, &metadata_hash) ==
97 static_cast<off_t>(metadata_size_));
98 metadata_hash_ = brillo::data_encoding::Base64Encode(metadata_hash);
99
100 brillo::Blob payload_hash;
101 TEST_AND_RETURN_FALSE(HashCalculator::RawHashOfFile(
102 payload_path_, payload_size_, &payload_hash) ==
103 static_cast<off_t>(payload_size_));
104 payload_hash_ = brillo::data_encoding::Base64Encode(payload_hash);
105
106 if (payload_metadata.GetMetadataSignatureSize() > 0) {
107 TEST_AND_RETURN_FALSE(metadata_signatures.signatures_size() > 0);
108 vector<string> base64_signatures;
109 for (const auto& sig : metadata_signatures.signatures()) {
110 base64_signatures.push_back(
111 brillo::data_encoding::Base64Encode(sig.data()));
112 }
113 metadata_signatures_ = base::JoinString(base64_signatures, ":");
114 }
115
116 is_delta_ = std::any_of(manifest.partitions().begin(),
117 manifest.partitions().end(),
118 [](const PartitionUpdate& part) {
119 return part.has_old_partition_info();
120 });
121 return true;
122 }
123
124 } // namespace chromeos_update_engine
125