| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| #include "apex_manifest.h" |
| #include "string_log.h" |
| #include <android-base/logging.h> |
| |
| #include <google/protobuf/util/json_util.h> |
| #include <google/protobuf/util/type_resolver_util.h> |
| #include <memory> |
| #include <string> |
| |
| using android::base::Error; |
| using android::base::Result; |
| using google::protobuf::DescriptorPool; |
| using google::protobuf::util::NewTypeResolverForDescriptorPool; |
| using google::protobuf::util::TypeResolver; |
| |
| namespace android { |
| namespace apex { |
| namespace { |
| const char kTypeUrlPrefix[] = "type.googleapis.com"; |
| |
| std::string GetTypeUrl(const ApexManifest& apex_manifest) { |
| const google::protobuf::Descriptor* message = apex_manifest.GetDescriptor(); |
| return std::string(kTypeUrlPrefix) + "/" + message->full_name(); |
| } |
| |
| // TODO: JsonStringToMessage is a newly added function in protobuf |
| // and is not yet available in the android tree. Replace this function with |
| // https://developers.google.com/protocol-buffers/docs/reference/cpp/ |
| // google.protobuf.util.json_util#JsonStringToMessage.details |
| // as and when the android tree gets updated |
| Result<void> JsonToApexManifestMessage(const std::string& content, |
| ApexManifest* apex_manifest) { |
| std::unique_ptr<TypeResolver> resolver(NewTypeResolverForDescriptorPool( |
| kTypeUrlPrefix, DescriptorPool::generated_pool())); |
| std::string binary; |
| auto parse_status = JsonToBinaryString( |
| resolver.get(), GetTypeUrl(*apex_manifest), content, &binary); |
| if (!parse_status.ok()) { |
| return Error() << "Failed to parse APEX Manifest JSON config: " |
| << parse_status.error_message().as_string(); |
| } |
| |
| if (!apex_manifest->ParseFromString(binary)) { |
| return Error() << "Unexpected fields in APEX Manifest JSON config"; |
| } |
| return {}; |
| } |
| |
| } // namespace |
| |
| Result<ApexManifest> ParseManifest(const std::string& content) { |
| ApexManifest apex_manifest; |
| std::string err; |
| Result<void> parse_manifest_status = |
| JsonToApexManifestMessage(content, &apex_manifest); |
| if (!parse_manifest_status) { |
| return parse_manifest_status.error(); |
| } |
| |
| // Verifying required fields. |
| // name |
| if (apex_manifest.name().empty()) { |
| return Error() << "Missing required field \"name\" from APEX manifest."; |
| } |
| |
| // version |
| if (apex_manifest.version() == 0) { |
| return Error() << "Missing required field \"version\" from APEX manifest."; |
| } |
| return apex_manifest; |
| } |
| |
| std::string GetPackageId(const ApexManifest& apexManifest) { |
| return apexManifest.name() + "@" + std::to_string(apexManifest.version()); |
| } |
| |
| } // namespace apex |
| } // namespace android |