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/*
* Copyright (C) 2019 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.
*/
#define LOG_TAG "apexd"
#include "apex_preinstalled_data.h"
#include <unordered_map>
#include <android-base/file.h>
#include <android-base/result.h>
#include <android-base/strings.h>
#include "apex_constants.h"
#include "apex_file.h"
#include "apexd_utils.h"
#include "string_log.h"
using android::base::Error;
using android::base::Result;
namespace android {
namespace apex {
namespace {
struct ApexPreinstalledData {
std::string name;
std::string key;
std::string path;
};
std::unordered_map<std::string, ApexPreinstalledData> gScannedPreinstalledData;
Result<std::vector<ApexPreinstalledData>> collectPreinstalleDataFromDir(
const std::string& dir) {
LOG(INFO) << "Scanning " << dir << " for preinstalled data";
std::vector<ApexPreinstalledData> ret;
if (access(dir.c_str(), F_OK) != 0 && errno == ENOENT) {
LOG(INFO) << "... does not exist. Skipping";
return ret;
}
const bool scanBuiltinApexes = isPathForBuiltinApexes(dir);
if (!scanBuiltinApexes) {
return Error() << "Can't scan preinstalled APEX data from " << dir;
}
Result<std::vector<std::string>> apex_files = FindApexFilesByName(dir);
if (!apex_files.ok()) {
return apex_files.error();
}
for (const auto& file : *apex_files) {
Result<ApexFile> apex_file = ApexFile::Open(file);
if (!apex_file.ok()) {
return Error() << "Failed to open " << file << " : " << apex_file.error();
}
ApexPreinstalledData apexPreInstalledData;
apexPreInstalledData.name = apex_file->GetManifest().name();
apexPreInstalledData.key = apex_file->GetBundledPublicKey();
apexPreInstalledData.path = apex_file->GetPath();
ret.push_back(apexPreInstalledData);
}
return ret;
}
Result<void> updatePreinstalledData(
const std::vector<ApexPreinstalledData>& apexes) {
for (const ApexPreinstalledData& apex : apexes) {
if (gScannedPreinstalledData.find(apex.name) ==
gScannedPreinstalledData.end()) {
gScannedPreinstalledData.insert({apex.name, apex});
} else {
const std::string& existing_key =
gScannedPreinstalledData.at(apex.name).key;
if (existing_key != apex.key) {
return Error() << "Key for package " << apex.name
<< " does not match with previously scanned key";
}
}
}
return {};
}
} // namespace
Result<void> collectPreinstalledData(const std::vector<std::string>& dirs) {
for (const auto& dir : dirs) {
Result<std::vector<ApexPreinstalledData>> preinstalledData =
collectPreinstalleDataFromDir(dir);
if (!preinstalledData.ok()) {
return Error() << "Failed to collect keys from " << dir << " : "
<< preinstalledData.error();
}
Result<void> st = updatePreinstalledData(*preinstalledData);
if (!st.ok()) {
return st;
}
}
return {};
}
Result<const std::string> getApexKey(const std::string& name) {
if (gScannedPreinstalledData.find(name) == gScannedPreinstalledData.end()) {
return Error() << "No preinstalled data found for package " << name;
}
return gScannedPreinstalledData[name].key;
}
Result<const std::string> getApexPreinstalledPath(const std::string& name) {
if (gScannedPreinstalledData.find(name) == gScannedPreinstalledData.end()) {
return Error() << "No preinstalled data found for package " << name;
}
return gScannedPreinstalledData[name].path;
}
bool HasPreInstalledVersion(const std::string& name) {
return gScannedPreinstalledData.find(name) != gScannedPreinstalledData.end();
}
} // namespace apex
} // namespace android
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