1 /*
2 * Copyright (C) 2018 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 "apex_manifest.h"
18 #include "string_log.h"
19 #include <android-base/logging.h>
20
21 #include <google/protobuf/util/json_util.h>
22 #include <google/protobuf/util/type_resolver_util.h>
23 #include <memory>
24 #include <string>
25
26 using google::protobuf::DescriptorPool;
27 using google::protobuf::scoped_ptr;
28 using google::protobuf::util::NewTypeResolverForDescriptorPool;
29 using google::protobuf::util::TypeResolver;
30
31 namespace android {
32 namespace apex {
33 namespace {
34 const char kTypeUrlPrefix[] = "type.googleapis.com";
35
GetTypeUrl(const ApexManifest & apex_manifest)36 std::string GetTypeUrl(const ApexManifest& apex_manifest) {
37 const google::protobuf::Descriptor* message = apex_manifest.GetDescriptor();
38 return std::string(kTypeUrlPrefix) + "/" + message->full_name();
39 }
40
41 // TODO: JsonStringToMessage is a newly added function in protobuf
42 // and is not yet available in the android tree. Replace this function with
43 // https://developers.google.com/protocol-buffers/docs/reference/cpp/
44 // google.protobuf.util.json_util#JsonStringToMessage.details
45 // as and when the android tree gets updated
JsonToApexManifestMessage(const std::string & content,ApexManifest & apex_manifest)46 StatusOr<ApexManifest> JsonToApexManifestMessage(const std::string& content,
47 ApexManifest& apex_manifest) {
48 scoped_ptr<TypeResolver> resolver(NewTypeResolverForDescriptorPool(
49 kTypeUrlPrefix, DescriptorPool::generated_pool()));
50 std::string binary;
51 auto parse_status = JsonToBinaryString(
52 resolver.get(), GetTypeUrl(apex_manifest), content, &binary);
53 if (!parse_status.ok()) {
54 return StatusOr<ApexManifest>::MakeError(
55 StringLog() << "Failed to parse APEX Manifest JSON config: "
56 << parse_status.error_message().as_string());
57 }
58
59 if (!apex_manifest.ParseFromString(binary)) {
60 return StatusOr<ApexManifest>::MakeError(
61 StringLog() << "Unexpected fields in APEX Manifest JSON config");
62 }
63 return StatusOr<ApexManifest>(apex_manifest);
64 }
65
66 } // namespace
67
ParseManifest(const std::string & content)68 StatusOr<ApexManifest> ParseManifest(const std::string& content) {
69 ApexManifest apex_manifest;
70 std::string err;
71 StatusOr<ApexManifest> parse_manifest_status =
72 JsonToApexManifestMessage(content, apex_manifest);
73 if (!parse_manifest_status.Ok()) {
74 return parse_manifest_status;
75 }
76
77 // Verifying required fields.
78 // name
79 if (apex_manifest.name().empty()) {
80 err = StringLog() << "Missing required field \"name\" from APEX manifest.";
81 return StatusOr<ApexManifest>::MakeError(err);
82 }
83
84 // version
85 if (apex_manifest.version() == 0) {
86 err =
87 StringLog() << "Missing required field \"version\" from APEX manifest.";
88 return StatusOr<ApexManifest>::MakeError(err);
89 }
90 return parse_manifest_status;
91 }
92
GetPackageId(const ApexManifest & apexManifest)93 std::string GetPackageId(const ApexManifest& apexManifest) {
94 return apexManifest.name() + "@" + std::to_string(apexManifest.version());
95 }
96
97 } // namespace apex
98 } // namespace android
99