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 21 class DataProtector { 22 public: DataProtector()23 DataProtector() : encryptedAddrOrData(0) {} DataProtector(const uintptr_t pointer)24 explicit DataProtector(const uintptr_t pointer) 25 { 26 Update(pointer); 27 } 28 29 ~DataProtector() = default; 30 31 static uintptr_t AutDecrypt(const uintptr_t pointer, [[maybe_unused]]const uintptr_t address); 32 static uintptr_t PacEncrypt(const uintptr_t pointer, [[maybe_unused]]const uintptr_t address); 33 Update(const uintptr_t pointer)34 void Update(const uintptr_t pointer) 35 { 36 #if defined(NAPI_ENABLE_DATA_PROTECT) 37 if (pointer == 0) { 38 encryptedAddrOrData = 0; 39 return; 40 } 41 encryptedAddrOrData = PacEncrypt(pointer, reinterpret_cast<uintptr_t>(&encryptedAddrOrData)); 42 #else 43 encryptedAddrOrData = pointer; 44 #endif 45 } 46 GetData()47 uintptr_t GetData() const 48 { 49 #if defined(NAPI_ENABLE_DATA_PROTECT) 50 if (encryptedAddrOrData == 0) { 51 return encryptedAddrOrData; 52 } 53 return AutDecrypt(encryptedAddrOrData, reinterpret_cast<uintptr_t>(&encryptedAddrOrData)); 54 #else 55 return encryptedAddrOrData; 56 #endif 57 } 58 59 private: 60 uintptr_t encryptedAddrOrData; 61 }; 62 #endif 63