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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/cryptauth/remote_device_loader.h"
#include <algorithm>
#include <utility>
#include "base/base64url.h"
#include "base/bind.h"
#include "base/memory/ptr_util.h"
#include "chromeos/components/proximity_auth/logging/logging.h"
#include "components/cryptauth/remote_device.h"
#include "components/cryptauth/remote_device_ref.h"
#include "components/cryptauth/secure_message_delegate.h"
namespace {
std::map<cryptauth::SoftwareFeature, cryptauth::SoftwareFeatureState>
GetSoftwareFeatureToStateMap(const cryptauth::ExternalDeviceInfo& device) {
std::map<cryptauth::SoftwareFeature, cryptauth::SoftwareFeatureState>
software_feature_to_state_map;
for (int i = 0; i < device.supported_software_features_size(); ++i) {
software_feature_to_state_map[device.supported_software_features(i)] =
cryptauth::SoftwareFeatureState::kSupported;
}
for (int i = 0; i < device.enabled_software_features_size(); ++i) {
software_feature_to_state_map[device.enabled_software_features(i)] =
cryptauth::SoftwareFeatureState::kEnabled;
}
return software_feature_to_state_map;
}
} // namespace
namespace cryptauth {
// static
RemoteDeviceLoader::Factory* RemoteDeviceLoader::Factory::factory_instance_ =
nullptr;
// static
std::unique_ptr<RemoteDeviceLoader> RemoteDeviceLoader::Factory::NewInstance(
const std::vector<cryptauth::ExternalDeviceInfo>& device_info_list,
const std::string& user_id,
const std::string& user_private_key,
std::unique_ptr<cryptauth::SecureMessageDelegate> secure_message_delegate) {
if (!factory_instance_) {
factory_instance_ = new Factory();
}
return factory_instance_->BuildInstance(device_info_list,
user_id,
user_private_key,
std::move(secure_message_delegate));
}
// static
void RemoteDeviceLoader::Factory::SetInstanceForTesting(Factory* factory) {
factory_instance_ = factory;
}
std::unique_ptr<RemoteDeviceLoader> RemoteDeviceLoader::Factory::BuildInstance(
const std::vector<cryptauth::ExternalDeviceInfo>& device_info_list,
const std::string& user_id,
const std::string& user_private_key,
std::unique_ptr<cryptauth::SecureMessageDelegate> secure_message_delegate) {
return base::WrapUnique(
new RemoteDeviceLoader(device_info_list,
user_id,
user_private_key,
std::move(secure_message_delegate)));
}
RemoteDeviceLoader::RemoteDeviceLoader(
const std::vector<cryptauth::ExternalDeviceInfo>& device_info_list,
const std::string& user_id,
const std::string& user_private_key,
std::unique_ptr<cryptauth::SecureMessageDelegate> secure_message_delegate)
: remaining_devices_(device_info_list),
user_id_(user_id),
user_private_key_(user_private_key),
secure_message_delegate_(std::move(secure_message_delegate)),
weak_ptr_factory_(this) {}
RemoteDeviceLoader::~RemoteDeviceLoader() {}
void RemoteDeviceLoader::Load(const RemoteDeviceCallback& callback) {
DCHECK(callback_.is_null());
callback_ = callback;
PA_LOG(INFO) << "Loading " << remaining_devices_.size()
<< " remote devices";
if (remaining_devices_.empty()) {
callback_.Run(remote_devices_);
return;
}
std::vector<cryptauth::ExternalDeviceInfo> all_devices_to_convert =
remaining_devices_;
for (const auto& device : all_devices_to_convert) {
secure_message_delegate_->DeriveKey(
user_private_key_, device.public_key(),
base::Bind(&RemoteDeviceLoader::OnPSKDerived,
weak_ptr_factory_.GetWeakPtr(), device));
}
}
void RemoteDeviceLoader::OnPSKDerived(
const cryptauth::ExternalDeviceInfo& device,
const std::string& psk) {
std::string public_key = device.public_key();
auto iterator = std::find_if(
remaining_devices_.begin(), remaining_devices_.end(),
[&public_key](const cryptauth::ExternalDeviceInfo& device) {
return device.public_key() == public_key;
});
DCHECK(iterator != remaining_devices_.end());
remaining_devices_.erase(iterator);
std::vector<BeaconSeed> beacon_seeds;
for (const BeaconSeed& beacon_seed : device.beacon_seeds())
beacon_seeds.push_back(beacon_seed);
RemoteDevice remote_device(
user_id_, device.friendly_device_name(), device.public_key(), psk,
device.last_update_time_millis(), GetSoftwareFeatureToStateMap(device),
beacon_seeds);
remote_devices_.push_back(remote_device);
if (remaining_devices_.empty()) {
PA_LOG(INFO) << "Derived keys for " << remote_devices_.size()
<< " devices.";
callback_.Run(remote_devices_);
}
}
} // namespace cryptauth
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