1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <optional> 20 21 #include <keymaster/key_blob_utils/auth_encrypted_key_blob.h> 22 #include <keymaster/secure_deletion_secret_storage.h> 23 24 namespace keymaster { 25 26 class RandomSource; 27 28 class TrustySecureDeletionSecretStorage : public SecureDeletionSecretStorage { 29 public: TrustySecureDeletionSecretStorage(const RandomSource & random)30 TrustySecureDeletionSecretStorage(const RandomSource& random) 31 : SecureDeletionSecretStorage(random) {} 32 33 std::optional<SecureDeletionData> CreateDataForNewKey( 34 bool secure_deletion, 35 bool is_upgrade) const override; 36 SecureDeletionData GetDataForKey(uint32_t key_slot) const override; 37 void DeleteKey(uint32_t key_slot) const override; 38 void DeleteAllKeys() const override; 39 40 private: 41 bool LoadOrCreateFactoryResetSecret(bool wait_for_port) const; 42 43 // Holds the factory reset secret. If not std::nullopt, also indicates that 44 // secure storage has been read successfully at least once. 45 mutable std::optional<Buffer> factory_reset_secret_; 46 }; 47 48 } // namespace keymaster 49