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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/pairing_registry_delegate_linux.h"
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "base/files/important_file_writer.h"
#include "base/functional/bind.h"
#include "base/json/json_file_value_serializer.h"
#include "base/json/json_string_value_serializer.h"
#include "base/json/json_writer.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "remoting/host/branding.h"
namespace {
// The pairing registry path relative to the configuration directory.
const char kRegistryDirectory[] = "paired-clients";
const char kPairingFilenameFormat[] = "%s.json";
const char kPairingFilenamePattern[] = "*.json";
} // namespace
namespace remoting {
using protocol::PairingRegistry;
PairingRegistryDelegateLinux::PairingRegistryDelegateLinux() = default;
PairingRegistryDelegateLinux::~PairingRegistryDelegateLinux() = default;
base::Value::List PairingRegistryDelegateLinux::LoadAll() {
base::Value::List pairings;
// Enumerate all pairing files in the pairing registry.
base::FilePath registry_path = GetRegistryPath();
base::FileEnumerator enumerator(registry_path, false,
base::FileEnumerator::FILES,
kPairingFilenamePattern);
for (base::FilePath pairing_file = enumerator.Next(); !pairing_file.empty();
pairing_file = enumerator.Next()) {
// Read the JSON containing pairing data.
JSONFileValueDeserializer deserializer(pairing_file);
int error_code;
std::string error_message;
std::unique_ptr<base::Value> pairing_json =
deserializer.Deserialize(&error_code, &error_message);
if (!pairing_json) {
LOG(WARNING) << "Failed to load '" << pairing_file.value() << "' ("
<< error_code << ").";
continue;
}
pairings.Append(base::Value::FromUniquePtrValue(std::move(pairing_json)));
}
return pairings;
}
bool PairingRegistryDelegateLinux::DeleteAll() {
// Delete all pairing files in the pairing registry.
base::FilePath registry_path = GetRegistryPath();
base::FileEnumerator enumerator(registry_path, false,
base::FileEnumerator::FILES,
kPairingFilenamePattern);
bool success = true;
for (base::FilePath pairing_file = enumerator.Next(); !pairing_file.empty();
pairing_file = enumerator.Next()) {
success = success && base::DeleteFile(pairing_file);
}
return success;
}
PairingRegistry::Pairing PairingRegistryDelegateLinux::Load(
const std::string& client_id) {
base::FilePath registry_path = GetRegistryPath();
base::FilePath pairing_file = registry_path.Append(
base::StringPrintf(kPairingFilenameFormat, client_id.c_str()));
JSONFileValueDeserializer deserializer(pairing_file);
int error_code;
std::string error_message;
std::unique_ptr<base::Value> pairing =
deserializer.Deserialize(&error_code, &error_message);
if (!pairing) {
LOG(WARNING) << "Failed to load pairing information: " << error_message
<< " (" << error_code << ").";
return PairingRegistry::Pairing();
}
if (!pairing->is_dict()) {
LOG(WARNING) << "Failed to parse pairing information: not a dictionary.";
return PairingRegistry::Pairing();
}
return PairingRegistry::Pairing::CreateFromValue(pairing->GetDict());
}
bool PairingRegistryDelegateLinux::Save(
const PairingRegistry::Pairing& pairing) {
base::FilePath registry_path = GetRegistryPath();
base::File::Error error;
if (!base::CreateDirectoryAndGetError(registry_path, &error)) {
LOG(ERROR) << "Could not create pairing registry directory: " << error;
return false;
}
std::optional<std::string> pairing_json = base::WriteJson(pairing.ToValue());
if (!pairing_json.has_value()) {
LOG(ERROR) << "Failed to serialize pairing data for "
<< pairing.client_id();
return false;
}
base::FilePath pairing_file = registry_path.Append(
base::StringPrintf(kPairingFilenameFormat, pairing.client_id().c_str()));
if (!base::ImportantFileWriter::WriteFileAtomically(pairing_file,
*pairing_json)) {
LOG(ERROR) << "Could not save pairing data for " << pairing.client_id();
return false;
}
return true;
}
bool PairingRegistryDelegateLinux::Delete(const std::string& client_id) {
base::FilePath registry_path = GetRegistryPath();
base::FilePath pairing_file = registry_path.Append(
base::StringPrintf(kPairingFilenameFormat, client_id.c_str()));
return base::DeleteFile(pairing_file);
}
base::FilePath PairingRegistryDelegateLinux::GetRegistryPath() {
if (!registry_path_for_testing_.empty()) {
return registry_path_for_testing_;
}
base::FilePath config_dir = remoting::GetConfigDir();
return config_dir.Append(kRegistryDirectory);
}
void PairingRegistryDelegateLinux::SetRegistryPathForTesting(
const base::FilePath& registry_path) {
registry_path_for_testing_ = registry_path;
}
std::unique_ptr<PairingRegistry::Delegate> CreatePairingRegistryDelegate() {
return std::make_unique<PairingRegistryDelegateLinux>();
}
} // namespace remoting
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