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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/environment_recorder.h"
#include "base/base64.h"
#include "base/hash/sha1.h"
#include "base/strings/string_number_conversions.h"
#include "components/metrics/metrics_pref_names.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "third_party/metrics_proto/system_profile.pb.h"
namespace metrics {
namespace {
// Computes a SHA-1 hash of |data| and returns it as a hex string.
std::string ComputeSHA1(const std::string& data) {
const std::string sha1 = base::SHA1HashString(data);
return base::HexEncode(sha1.data(), sha1.size());
}
} // namespace
EnvironmentRecorder::EnvironmentRecorder(PrefService* local_state)
: local_state_(local_state) {}
EnvironmentRecorder::~EnvironmentRecorder() = default;
std::string EnvironmentRecorder::SerializeAndRecordEnvironmentToPrefs(
const SystemProfileProto& system_profile) {
std::string serialized_system_profile;
std::string base64_system_profile;
if (system_profile.SerializeToString(&serialized_system_profile)) {
// Persist the system profile to disk. In the event of an unclean shutdown,
// it will be used as part of the initial stability report.
base::Base64Encode(serialized_system_profile, &base64_system_profile);
local_state_->SetString(prefs::kStabilitySavedSystemProfile,
base64_system_profile);
local_state_->SetString(prefs::kStabilitySavedSystemProfileHash,
ComputeSHA1(serialized_system_profile));
}
return serialized_system_profile;
}
bool EnvironmentRecorder::LoadEnvironmentFromPrefs(
SystemProfileProto* system_profile) {
DCHECK(system_profile);
const std::string base64_system_profile =
local_state_->GetString(prefs::kStabilitySavedSystemProfile);
if (base64_system_profile.empty())
return false;
const std::string system_profile_hash =
local_state_->GetString(prefs::kStabilitySavedSystemProfileHash);
std::string serialized_system_profile;
return base::Base64Decode(base64_system_profile,
&serialized_system_profile) &&
ComputeSHA1(serialized_system_profile) == system_profile_hash &&
system_profile->ParseFromString(serialized_system_profile);
}
void EnvironmentRecorder::ClearEnvironmentFromPrefs() {
local_state_->ClearPref(prefs::kStabilitySavedSystemProfile);
local_state_->ClearPref(prefs::kStabilitySavedSystemProfileHash);
}
int64_t EnvironmentRecorder::GetLastBuildtime() {
return local_state_->GetInt64(prefs::kStabilityStatsBuildTime);
}
std::string EnvironmentRecorder::GetLastVersion() {
return local_state_->GetString(prefs::kStabilityStatsVersion);
}
void EnvironmentRecorder::SetBuildtimeAndVersion(int64_t buildtime,
const std::string& version) {
local_state_->SetInt64(prefs::kStabilityStatsBuildTime, buildtime);
local_state_->SetString(prefs::kStabilityStatsVersion, version);
}
// static
void EnvironmentRecorder::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterStringPref(prefs::kStabilitySavedSystemProfile,
std::string());
registry->RegisterStringPref(prefs::kStabilitySavedSystemProfileHash,
std::string());
registry->RegisterStringPref(prefs::kStabilityStatsVersion, std::string());
registry->RegisterInt64Pref(prefs::kStabilityStatsBuildTime, 0);
}
} // namespace metrics
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