1 /* 2 * Copyright (c) 2022 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 SECURITY_GUARD_JSON_CFG_H 17 #define SECURITY_GUARD_JSON_CFG_H 18 19 #include "nlohmann/json.hpp" 20 21 namespace OHOS::Security::SecurityGuard { 22 #define JSON_CHECK_HELPER_RETURN_IF_FAILED(json, key, type, code) \ 23 do { \ 24 if ((json).find((key)) == (json).end()) { \ 25 return (code); \ 26 } \ 27 if (!(json).at((key)).is_##type()) { \ 28 return (code); \ 29 } \ 30 } while (0) 31 32 class JsonCfg { 33 public: 34 static bool Unmarshal(uint64_t &data, nlohmann::json jsonObj, std::string key); 35 static bool Unmarshal(int64_t &data, nlohmann::json jsonObj, std::string key); 36 static bool Unmarshal(uint32_t &data, nlohmann::json jsonObj, std::string key); 37 static bool Unmarshal(int32_t &data, nlohmann::json jsonObj, std::string key); 38 static bool Unmarshal(std::string &data, nlohmann::json jsonObj, std::string key); 39 static bool Unmarshal(std::vector<int32_t> &data, nlohmann::json jsonObj, std::string key); 40 static bool Unmarshal(std::vector<std::string> &data, nlohmann::json jsonObj, std::string key); 41 template<typename T> Unmarshal(T & data,nlohmann::json jsonObj,std::string key)42 static bool Unmarshal(T &data, nlohmann::json jsonObj, std::string key) 43 { 44 JSON_CHECK_HELPER_RETURN_IF_FAILED(jsonObj, key, object, false); 45 data = jsonObj.at(key).get<T>(); 46 return true; 47 } 48 49 template<typename T> Unmarshal(std::vector<T> & data,nlohmann::json jsonObj,std::string key)50 static bool Unmarshal(std::vector<T> &data, nlohmann::json jsonObj, std::string key) 51 { 52 JSON_CHECK_HELPER_RETURN_IF_FAILED(jsonObj, key, array, false); 53 nlohmann::json arrays = jsonObj.at(key); 54 for (const auto &element : arrays) { 55 if (!element.is_object()) { 56 return false; 57 } 58 data.emplace_back(element.get<T>()); 59 } 60 return true; 61 } 62 63 private: 64 JsonCfg() = default; 65 }; 66 } // namespace OHOS::Security::SecurityGuard 67 68 #endif // SECURITY_GUARD_JSON_CFG_H 69