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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <optional>
#include <keymaster/key_blob_utils/auth_encrypted_key_blob.h>
#include <keymaster/secure_deletion_secret_storage.h>
namespace keymaster {
class RandomSource;
class TrustySecureDeletionSecretStorage : public SecureDeletionSecretStorage {
public:
TrustySecureDeletionSecretStorage(const RandomSource& random)
: SecureDeletionSecretStorage(random) {}
std::optional<SecureDeletionData> CreateDataForNewKey(
bool secure_deletion,
bool is_upgrade) const override;
SecureDeletionData GetDataForKey(uint32_t key_slot) const override;
void DeleteKey(uint32_t key_slot) const override;
void DeleteAllKeys() const override;
private:
bool LoadOrCreateFactoryResetSecret(bool wait_for_port) const;
// Holds the factory reset secret. If not std::nullopt, also indicates that
// secure storage has been read successfully at least once.
mutable std::optional<Buffer> factory_reset_secret_;
};
} // namespace keymaster
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