1 /* 2 * Copyright 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 <keymaster/secure_key_storage.h> 20 21 namespace keymaster { 22 23 class PureSoftSecureStorageMap; 24 25 /** 26 * This is the pure software emulation of secure key storage. 27 */ 28 class PureSoftSecureKeyStorage : public SecureKeyStorage { 29 public: 30 explicit PureSoftSecureKeyStorage(uint32_t max_slot); 31 ~PureSoftSecureKeyStorage() override; 32 33 /** 34 * Writes the key blob along with the keyid as the index into pure software emulated secure 35 * key storage. 36 */ 37 keymaster_error_t WriteKey(const km_id_t keyid, const KeymasterKeyBlob& blob) override; 38 39 /** 40 * Checks if the key blob with key id exists in pure software secure key storage. 41 */ 42 keymaster_error_t KeyExists(const km_id_t keyid, bool* exists) override; 43 44 /** 45 * Deletes the key blob with key id from pure software secure key storage. 46 */ 47 keymaster_error_t DeleteKey(const km_id_t keyid) override; 48 49 /** 50 * Deletes all the key blob from pure software secure key storage. 51 */ 52 keymaster_error_t DeleteAllKeys() override; 53 54 /** 55 * Checks if the pure software secure key storage still has available slot. 56 */ 57 keymaster_error_t HasSlot(bool* has_slot) override; 58 59 private: 60 PureSoftSecureStorageMap* pure_soft_secure_storage_map_; 61 }; 62 63 } // namespace keymaster 64