1 /** 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef FOUNDATION_ACE_NAPI_UTILS_DATA_PROTECTOR_H 17 #define FOUNDATION_ACE_NAPI_UTILS_DATA_PROTECTOR_H 18 19 #include <cstdint> 20 #include "utils/macros.h" 21 22 class DataProtector { 23 public: DataProtector()24 DataProtector() : encryptedAddrOrData(0) {} DataProtector(const uintptr_t pointer)25 explicit DataProtector(const uintptr_t pointer) 26 { 27 Update(pointer); 28 } 29 30 ~DataProtector() = default; 31 32 NAPI_EXPORT uintptr_t AutDecrypt(const uintptr_t pointer, [[maybe_unused]]const uintptr_t address) const; 33 NAPI_EXPORT uintptr_t PacEncrypt(const uintptr_t pointer, [[maybe_unused]]const uintptr_t address); 34 Update(const uintptr_t pointer)35 void Update(const uintptr_t pointer) 36 { 37 if (pointer == 0) { 38 encryptedAddrOrData = 0; 39 return; 40 } 41 encryptedAddrOrData = PacEncrypt(pointer, reinterpret_cast<uintptr_t>(&encryptedAddrOrData)); 42 } 43 GetData()44 uintptr_t GetData() const 45 { 46 if (encryptedAddrOrData == 0) { 47 return encryptedAddrOrData; 48 } 49 return AutDecrypt(encryptedAddrOrData, reinterpret_cast<uintptr_t>(&encryptedAddrOrData)); 50 } 51 52 private: 53 uintptr_t encryptedAddrOrData; 54 }; 55 #endif 56