1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCRT_CFX_CHECKSUMCONTEXT_H_ 8 #define CORE_FXCRT_CFX_CHECKSUMCONTEXT_H_ 9 10 #include <memory> 11 12 #include "core/fdrm/crypto/fx_crypt.h" 13 #include "core/fxcrt/xml/cfx_saxreader.h" 14 15 class CFX_ChecksumContext { 16 public: 17 CFX_ChecksumContext(); 18 ~CFX_ChecksumContext(); 19 20 void StartChecksum(); 21 void Update(const ByteStringView& bsText); 22 bool UpdateChecksum(const RetainPtr<IFX_SeekableReadStream>& pSrcFile, 23 FX_FILESIZE offset = 0, 24 size_t size = 0); 25 void FinishChecksum(); 26 ByteString GetChecksum() const; 27 28 private: 29 std::unique_ptr<CFX_SAXReader> m_pSAXReader; 30 std::unique_ptr<CRYPT_sha1_context> m_pByteContext; 31 ByteString m_bsChecksum; 32 }; 33 34 #endif // CORE_FXCRT_CFX_CHECKSUMCONTEXT_H_ 35
