SaraP
522c48f27e
- ricompilate versioni a 32bit con v141_xp (VisualStudio 2017 C++ per XP) - eliminate le correzioni introdotte per compilare con VS2013.
58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
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#include "Common/Platform/NMR_EncryptionHeader.h"
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#include "Common/NMR_ErrorConst.h"
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#include "Common/NMR_Exception.h"
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#include "Common/Platform/NMR_ImportStream.h"
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#include "Common/Platform/NMR_ExportStream.h"
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#include "Common/NMR_Architecture_Utils.h"
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#include <cstring>
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namespace NMR {
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CEncryptionHeader::CEncryptionHeader(std::vector<nfByte> const & additionalData)
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:m_rgAdditionalData(additionalData)
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{
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}
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size_t CEncryptionHeader::readFrom(PImportStream from) {
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uEncryptedFileHeader header = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
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from->readIntoBuffer(header.bytes, sizeof(header), true);
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if (isBigEndian()) {
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header.Header.Length.length = swapBytes(header.Header.Length.length);
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}
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constexpr size_t sigSize = sizeof(header.Header.Signature.bytes);
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if (strncmp((char *)header.Header.Signature.bytes, "%3McF", sigSize) != 0)
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throw CNMRException(NMR_ERROR_COULDNOTREADENCRYPTEDSTREAM);
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if (header.Header.majorVersion != 0 || header.Header.minorVersion != 0)
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throw CNMRException(NMR_ERROR_ENCRYPTEDCONTENTVERSIONUNSUPPORTED);
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constexpr size_t headerSize = sizeof(header);
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nfUint32 remainingBytes = header.Header.Length.length - headerSize;
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if (remainingBytes > 0) {
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m_rgAdditionalData.resize(remainingBytes, 0);
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from->readIntoBuffer(m_rgAdditionalData.data(), remainingBytes, true);
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}
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m_nfHeaderSize = header.Header.Length.length;
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return m_nfHeaderSize;
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}
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size_t CEncryptionHeader::writeTo(PExportStream to) {
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uEncryptedFileHeader header = { { '%', '3', 'M', 'c', 'F', 0, 0, 0, 0, 0, 0, 0 } };
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constexpr size_t headerSize = sizeof(header);
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m_nfHeaderSize = (nfUint32)(headerSize + m_rgAdditionalData.size());
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header.Header.Length.length = (nfUint32)m_nfHeaderSize;
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if (isBigEndian()) {
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header.Header.Length.length = swapBytes(header.Header.Length.length);
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}
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to->writeBuffer(header.bytes, headerSize);
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if (m_rgAdditionalData.size() > 0)
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to->writeBuffer(m_rgAdditionalData.data(), m_rgAdditionalData.size());
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return m_nfHeaderSize;
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}
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std::vector<nfByte> const & CEncryptionHeader::additionalData() const {
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return m_rgAdditionalData;
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}
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nfUint64 CEncryptionHeader::headerSize() const {
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return m_nfHeaderSize;
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}
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} |