1 /* 2 * Copyright (C) 2021 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 #ifndef HAP_RANDOM_ACCESS_FILE_H 16 #define HAP_RANDOM_ACCESS_FILE_H 17 18 #include "common/export_define.h" 19 #include "common/hap_byte_buffer.h" 20 #include "util/digest_parameter.h" 21 22 namespace OHOS { 23 namespace Security { 24 namespace Verify { 25 struct MmapInfo { 26 long long mmapPosition; 27 int readMoreLen; 28 int mmapSize; 29 char* mapAddr; 30 }; 31 32 class RandomAccessFile { 33 public: 34 DLL_EXPORT RandomAccessFile(); 35 DLL_EXPORT ~RandomAccessFile(); 36 DLL_EXPORT bool Init(const std::string& filePath); 37 DLL_EXPORT long long GetLength() const; 38 DLL_EXPORT long long ReadFileFullyFromOffset(HapByteBuffer& buffer, long long offset); 39 DLL_EXPORT long long ReadFileFullyFromOffset(char buf[], long long offset, int bufCapacity); 40 bool ReadFileFromOffsetAndDigestUpdate(const DigestParameter& digestParam, int chunkSize, long long offset); 41 42 private: 43 long long DoMMap(int bufCapacity, long long offset, MmapInfo& mmapInfo); 44 45 static const int FILE_OPEN_FAIL_ERROR_NUM; 46 static int memoryPageSize; 47 int fd; 48 long long fileLength; 49 }; 50 } // namespace Verify 51 } // namespace Security 52 } // namespace OHOS 53 #endif // HAP_RANDOM_ACCESS_FILE_H 54