SaraP
91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
/*++
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Copyright (C) 2020 3MF Consortium (Original Author)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Abstract: This is a stub class implementation of CImportStream_Encrypted
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*/
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#include "Common/Platform/NMR_ImportStream_Encrypted.h"
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#include "Common/Platform/NMR_ImportStream_Unique_Memory.h"
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#include "Common/NMR_Exception.h"
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#include <vector>
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#include <array>
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namespace NMR {
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CImportStream_Encrypted::CImportStream_Encrypted(PImportStream pEncryptedStream, ContentEncryptionDescriptor pDecryptContext)
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:m_pEncryptedStream(pEncryptedStream), m_pDecryptContext(pDecryptContext)
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{
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if (nullptr == pEncryptedStream)
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throw CNMRException(NMR_ERROR_INVALIDPOINTER);
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m_header.readFrom(pEncryptedStream);
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}
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nfBool CImportStream_Encrypted::seekPosition(nfUint64 position, nfBool bHasToSucceed) {
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return m_pEncryptedStream->seekPosition(position + m_header.headerSize(), bHasToSucceed);
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}
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nfBool CImportStream_Encrypted::seekForward(nfUint64 bytes, nfBool bHasToSucceed) {
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return m_pEncryptedStream->seekForward(bytes, bHasToSucceed);
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}
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nfBool CImportStream_Encrypted::seekFromEnd(nfUint64 bytes, nfBool bHasToSucceed) {
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if (m_pEncryptedStream->getPosition() + m_header.headerSize() >= bytes) {
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return m_pEncryptedStream->seekFromEnd(bytes, bHasToSucceed);
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} else if (bHasToSucceed) {
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throw CNMRException(NMR_ERROR_COULDNOTSEEKSTREAM);
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}
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return false;
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}
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nfUint64 CImportStream_Encrypted::readIntoBuffer(nfByte * pBuffer, nfUint64 cbTotalBytesToRead, nfBool bNeedsToReadAll) {
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std::vector<nfByte> decBuffer(cbTotalBytesToRead, 0);
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nfUint64 bytesRead = m_pEncryptedStream->readIntoBuffer(decBuffer.data(), cbTotalBytesToRead, bNeedsToReadAll);
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if (bytesRead > 0) {
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nfUint64 decryted = m_pDecryptContext.m_fnCrypt(bytesRead, decBuffer.data(), pBuffer, m_pDecryptContext.m_sDekDecryptData);
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if (decryted != bytesRead)
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throw CNMRException(NMR_ERROR_CALCULATIONTERMINATED);
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}
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return bytesRead;
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}
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nfUint64 CImportStream_Encrypted::retrieveSize() {
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return m_pEncryptedStream->retrieveSize() - m_header.headerSize();
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}
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void CImportStream_Encrypted::writeToFile(const nfWChar * pwszFileName) {
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m_pEncryptedStream->writeToFile(pwszFileName);
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}
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PImportStream CImportStream_Encrypted::copyToMemory() {
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nfUint64 cbStreamSize = retrieveSize();
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return std::make_shared<CImportStream_Unique_Memory>(this, cbStreamSize, false);
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}
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nfUint64 CImportStream_Encrypted::getPosition() {
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return m_pEncryptedStream->getPosition() - m_header.headerSize();
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}
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} |