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 ASN1_UTIL_H 17 #define ASN1_UTIL_H 18 19 #include <cstdbool> 20 #include <cstdint> 21 #include <list> 22 #include <vector> 23 #include "telephony_log_wrapper.h" 24 25 namespace OHOS { 26 namespace Telephony { 27 class Asn1Utils { 28 public: 29 static bool IsConstructedTag(uint32_t tag); 30 static uint32_t CalculateEncodedBytesNumForLength(uint32_t length); 31 static uint32_t ByteCountForUint(uint32_t value); 32 static void BchToString(const std::vector<uint8_t> &src, std::string &destStr); 33 static void BcdToBytes(const std::string &bcd, std::vector<uint8_t> &bytes); 34 static std::string BytesToHexStr(const std::vector<uint8_t> &bytes); 35 static std::vector<uint8_t> HexStrToBytes(const std::string &hexStr); 36 static uint32_t UintToBytes(const uint32_t value, std::vector<uint8_t> &bytes); 37 static uint32_t IntToBytes(int32_t value, std::vector<uint8_t> &dest); 38 static std::string BytesToString(const std::vector<uint8_t> &src); 39 static std::string HexStrToString(const std::string &hexStr); 40 static std::vector<uint8_t> StringToBytes(const std::string &src); 41 static int32_t BytesToInt(const std::vector<uint8_t> &src, uint32_t offset, uint32_t length); 42 static uint8_t CountTrailingZeros(const uint8_t value); 43 static uint32_t ReverseInt(uint32_t value); 44 static uint32_t ByteToHexStr(uint8_t src, std::string &dest); 45 46 private: 47 static std::string SwapHexCharPair(const std::string &hexStr); 48 static std::string StrToHexStr(const std::string& str); 49 static uint32_t ByteCountForInt(uint32_t value, bool isSigned); 50 }; 51 } // namespace Telephony 52 } // namespace OHOS 53 #endif // ASN1_UTIL_H_ 54