135 lines
4.1 KiB
C++
135 lines
4.1 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "apexd"
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#include "apex_preinstalled_data.h"
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#include <unordered_map>
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#include <android-base/file.h>
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#include <android-base/result.h>
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#include <android-base/strings.h>
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#include "apex_constants.h"
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#include "apex_file.h"
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#include "apexd_utils.h"
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#include "string_log.h"
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using android::base::Error;
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using android::base::Result;
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namespace android {
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namespace apex {
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namespace {
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struct ApexPreinstalledData {
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std::string name;
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std::string key;
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std::string path;
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};
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std::unordered_map<std::string, ApexPreinstalledData> gScannedPreinstalledData;
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Result<std::vector<ApexPreinstalledData>> collectPreinstalleDataFromDir(
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const std::string& dir) {
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LOG(INFO) << "Scanning " << dir << " for preinstalled data";
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std::vector<ApexPreinstalledData> ret;
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if (access(dir.c_str(), F_OK) != 0 && errno == ENOENT) {
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LOG(INFO) << "... does not exist. Skipping";
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return ret;
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}
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const bool scanBuiltinApexes = isPathForBuiltinApexes(dir);
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if (!scanBuiltinApexes) {
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return Error() << "Can't scan preinstalled APEX data from " << dir;
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}
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Result<std::vector<std::string>> apex_files = FindApexFilesByName(dir);
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if (!apex_files.ok()) {
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return apex_files.error();
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}
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for (const auto& file : *apex_files) {
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Result<ApexFile> apex_file = ApexFile::Open(file);
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if (!apex_file.ok()) {
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return Error() << "Failed to open " << file << " : " << apex_file.error();
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}
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ApexPreinstalledData apexPreInstalledData;
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apexPreInstalledData.name = apex_file->GetManifest().name();
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apexPreInstalledData.key = apex_file->GetBundledPublicKey();
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apexPreInstalledData.path = apex_file->GetPath();
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ret.push_back(apexPreInstalledData);
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}
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return ret;
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}
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Result<void> updatePreinstalledData(
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const std::vector<ApexPreinstalledData>& apexes) {
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for (const ApexPreinstalledData& apex : apexes) {
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if (gScannedPreinstalledData.find(apex.name) ==
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gScannedPreinstalledData.end()) {
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gScannedPreinstalledData.insert({apex.name, apex});
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} else {
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const std::string& existing_key =
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gScannedPreinstalledData.at(apex.name).key;
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if (existing_key != apex.key) {
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return Error() << "Key for package " << apex.name
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<< " does not match with previously scanned key";
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}
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}
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}
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return {};
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}
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} // namespace
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Result<void> collectPreinstalledData(const std::vector<std::string>& dirs) {
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for (const auto& dir : dirs) {
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Result<std::vector<ApexPreinstalledData>> preinstalledData =
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collectPreinstalleDataFromDir(dir);
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if (!preinstalledData.ok()) {
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return Error() << "Failed to collect keys from " << dir << " : "
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<< preinstalledData.error();
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}
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Result<void> st = updatePreinstalledData(*preinstalledData);
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if (!st.ok()) {
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return st;
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}
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}
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return {};
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}
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Result<const std::string> getApexKey(const std::string& name) {
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if (gScannedPreinstalledData.find(name) == gScannedPreinstalledData.end()) {
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return Error() << "No preinstalled data found for package " << name;
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}
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return gScannedPreinstalledData[name].key;
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}
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Result<const std::string> getApexPreinstalledPath(const std::string& name) {
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if (gScannedPreinstalledData.find(name) == gScannedPreinstalledData.end()) {
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return Error() << "No preinstalled data found for package " << name;
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}
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return gScannedPreinstalledData[name].path;
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}
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bool HasPreInstalledVersion(const std::string& name) {
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return gScannedPreinstalledData.find(name) != gScannedPreinstalledData.end();
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}
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} // namespace apex
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} // namespace android
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