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// Copyright 2020 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/reporting/encryption/encryption_module.h"
#include <string>
#include <string_view>
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/task/thread_pool.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "components/reporting/encryption/encryption_module_interface.h"
#include "components/reporting/proto/synced/record.pb.h"
#include "components/reporting/util/status.h"
#include "components/reporting/util/statusor.h"
namespace reporting {
namespace {
// Helper function for asynchronous encryption.
void AddToRecord(std::string_view record,
Encryptor::Handle* handle,
base::OnceCallback<void(StatusOr<EncryptedRecord>)> cb) {
handle->AddToRecord(
record,
base::BindOnce(
[](Encryptor::Handle* handle,
base::OnceCallback<void(StatusOr<EncryptedRecord>)> cb,
Status status) {
if (!status.ok()) {
std::move(cb).Run(base::unexpected(std::move(status)));
return;
}
base::ThreadPool::PostTask(
FROM_HERE,
base::BindOnce(&Encryptor::Handle::CloseRecord,
base::Unretained(handle), std::move(cb)));
},
base::Unretained(handle), std::move(cb)));
}
} // namespace
EncryptionModule::EncryptionModule(base::TimeDelta renew_encryption_key_period)
: EncryptionModuleInterface(renew_encryption_key_period) {
static_assert(std::is_same<PublicKeyId, Encryptor::PublicKeyId>::value,
"Public key id types must match");
auto encryptor_result = Encryptor::Create();
CHECK(encryptor_result.has_value()) << encryptor_result.error();
encryptor_ = std::move(encryptor_result.value());
}
EncryptionModule::~EncryptionModule() = default;
void EncryptionModule::EncryptRecordImpl(
std::string_view record,
base::OnceCallback<void(StatusOr<EncryptedRecord>)> cb) const {
// Encryption key is available, encrypt.
encryptor_->OpenRecord(base::BindOnce(
[](std::string record,
base::OnceCallback<void(StatusOr<EncryptedRecord>)> cb,
StatusOr<Encryptor::Handle*> handle_result) {
if (!handle_result.has_value()) {
std::move(cb).Run(base::unexpected(std::move(handle_result).error()));
return;
}
base::ThreadPool::PostTask(
FROM_HERE, base::BindOnce(&AddToRecord, record,
base::Unretained(handle_result.value()),
std::move(cb)));
},
std::string(record), std::move(cb)));
}
void EncryptionModule::UpdateAsymmetricKeyImpl(
std::string_view new_public_key,
PublicKeyId new_public_key_id,
base::OnceCallback<void(Status)> response_cb) {
encryptor_->UpdateAsymmetricKey(new_public_key, new_public_key_id,
std::move(response_cb));
}
// static
scoped_refptr<EncryptionModuleInterface> EncryptionModule::Create(
base::TimeDelta renew_encryption_key_period) {
return base::WrapRefCounted(
new EncryptionModule(renew_encryption_key_period));
}
} // namespace reporting
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