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124 lines
3.0 KiB
C++
Executable File
124 lines
3.0 KiB
C++
Executable File
// RarIn.h
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#ifndef __ARCHIVE_RAR_IN_H
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#define __ARCHIVE_RAR_IN_H
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#include "Common/DynamicBuffer.h"
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#include "Common/MyCom.h"
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#include "../../ICoder.h"
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#include "../../IStream.h"
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#include "../../Common/StreamObjects.h"
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#include "../../Crypto/RarAes.h"
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#include "RarHeader.h"
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#include "RarItem.h"
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namespace NArchive {
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namespace NRar {
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class CInArchiveException
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{
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public:
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enum CCauseType
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{
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kUnexpectedEndOfArchive = 0,
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kArchiveHeaderCRCError,
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kFileHeaderCRCError,
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kIncorrectArchive
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}
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Cause;
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CInArchiveException(CCauseType cause) : Cause(cause) {}
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};
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struct CInArchiveInfo
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{
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UInt32 Flags;
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Byte EncryptVersion;
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UInt64 StartPosition;
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bool IsSolid() const { return (Flags & NHeader::NArchive::kSolid) != 0; }
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bool IsCommented() const { return (Flags & NHeader::NArchive::kComment) != 0; }
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bool IsVolume() const { return (Flags & NHeader::NArchive::kVolume) != 0; }
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bool HaveNewVolumeName() const { return (Flags & NHeader::NArchive::kNewVolName) != 0; }
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bool IsEncrypted() const { return (Flags & NHeader::NArchive::kBlockEncryption) != 0; }
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bool IsThereEncryptVer() const { return (Flags & NHeader::NArchive::kEncryptVer) != 0; }
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bool IsEncryptOld() const { return (!IsThereEncryptVer() || EncryptVersion < 36); }
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};
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class CInArchive
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{
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CMyComPtr<IInStream> m_Stream;
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UInt64 m_StreamStartPosition;
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CInArchiveInfo _header;
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CDynamicBuffer<char> m_NameBuffer;
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CDynamicBuffer<wchar_t> _unicodeNameBuffer;
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CByteBuffer _comment;
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void ReadName(CItemEx &item, int nameSize);
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void ReadHeaderReal(CItemEx &item);
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HRESULT ReadBytesSpec(void *data, size_t *size);
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bool ReadBytesAndTestSize(void *data, UInt32 size);
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HRESULT Open2(IInStream *stream, const UInt64 *searchHeaderSizeLimit);
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void ThrowExceptionWithCode(CInArchiveException::CCauseType cause);
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void ThrowUnexpectedEndOfArchiveException();
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void AddToSeekValue(UInt64 addValue);
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CDynamicBuffer<Byte> m_FileHeaderData;
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NHeader::NBlock::CBlock m_BlockHeader;
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NCrypto::NRar29::CDecoder *m_RarAESSpec;
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CMyComPtr<ICompressFilter> m_RarAES;
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Byte *m_CurData; // it must point to start of Rar::Block
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UInt32 m_CurPos;
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UInt32 m_PosLimit;
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Byte ReadByte();
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UInt16 ReadUInt16();
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UInt32 ReadUInt32();
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void ReadTime(Byte mask, CRarTime &rarTime);
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CBuffer<Byte> m_DecryptedData;
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Byte *m_DecryptedDataAligned;
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UInt32 m_DecryptedDataSize;
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bool m_CryptoMode;
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UInt32 m_CryptoPos;
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void FinishCryptoBlock()
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{
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if (m_CryptoMode)
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while ((m_CryptoPos & 0xF) != 0)
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{
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m_CryptoPos++;
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m_Position++;
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}
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}
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public:
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UInt64 m_Position;
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HRESULT Open(IInStream *inStream, const UInt64 *searchHeaderSizeLimit);
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void Close();
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HRESULT GetNextItem(CItemEx &item, ICryptoGetTextPassword *getTextPassword, bool &decryptionError, AString &errorMessage);
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void GetArchiveInfo(CInArchiveInfo &archiveInfo) const;
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void SeekInArchive(UInt64 position);
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ISequentialInStream *CreateLimitedStream(UInt64 position, UInt64 size);
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};
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}}
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#endif
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