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// Copyright 2019 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/sharing_message/vapid_key_manager.h"
#include "base/feature_list.h"
#include "components/sharing_message/features.h"
#include "components/sharing_message/sharing_sync_preference.h"
#include "components/sync/service/sync_service.h"
#include "crypto/ec_private_key.h"
VapidKeyManager::VapidKeyManager(SharingSyncPreference* sharing_sync_preference,
syncer::SyncService* sync_service)
: sharing_sync_preference_(sharing_sync_preference),
sync_service_(sync_service) {}
VapidKeyManager::~VapidKeyManager() = default;
crypto::ECPrivateKey* VapidKeyManager::GetOrCreateKey() {
if (!vapid_key_) {
RefreshCachedKey();
}
return vapid_key_.get();
}
bool VapidKeyManager::RefreshCachedKey() {
if (InitWithPreference()) {
return true;
}
if (vapid_key_) {
return false;
}
// Don't generate keys if preferences is not syncing to avoid isolated keys.
if (!sync_service_->GetActiveDataTypes().Has(syncer::PREFERENCES)) {
return false;
}
auto generated_key = crypto::ECPrivateKey::Create();
if (!generated_key) {
return false;
}
return UpdateCachedKey(std::move(generated_key));
}
bool VapidKeyManager::UpdateCachedKey(
std::unique_ptr<crypto::ECPrivateKey> new_key) {
std::vector<uint8_t> new_key_info;
if (!new_key->ExportPrivateKey(&new_key_info)) {
return false;
}
if (vapid_key_info_ == new_key_info) {
return false;
}
vapid_key_ = std::move(new_key);
vapid_key_info_ = std::move(new_key_info);
sharing_sync_preference_->SetVapidKey(vapid_key_info_);
return true;
}
bool VapidKeyManager::InitWithPreference() {
std::optional<std::vector<uint8_t>> preference_key_info =
sharing_sync_preference_->GetVapidKey();
if (!preference_key_info || vapid_key_info_ == *preference_key_info) {
return false;
}
vapid_key_ =
crypto::ECPrivateKey::CreateFromPrivateKeyInfo(*preference_key_info);
vapid_key_info_ = std::move(*preference_key_info);
return true;
}
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