// 7zIn.cpp
#include "StdAfx.h"
#include "../../../../C/7zCrc.h"
#include "../../../../C/CpuArch.h"
#include "../../Common/StreamObjects.h"
#include "../../Common/StreamUtils.h"
#include "7zDecode.h"
#include "7zIn.h"
#define Get16(p) GetUi16(p)
#define Get32(p) GetUi32(p)
#define Get64(p) GetUi64(p)
// define FORMAT_7Z_RECOVERY if you want to recover multivolume archives with empty StartHeader
#ifndef _SFX
#define FORMAT_7Z_RECOVERY
#endif
namespace NArchive {
namespace N7z {
static void BoolVector_Fill_False(CBoolVector &v, int size)
{
v.Clear();
v.Reserve(size);
for (int i = 0; i < size; i++)
v.Add(false);
}
static bool BoolVector_GetAndSet(CBoolVector &v, UInt32 index)
{
if (index >= (UInt32)v.Size())
return true;
bool res = v[index];
v[index] = true;
return res;
}
bool CFolder::CheckStructure() const
{
const int kNumCodersMax = sizeof(UInt32) * 8; // don't change it
const int kMaskSize = sizeof(UInt32) * 8; // it must be >= kNumCodersMax
const int kNumBindsMax = 32;
if (Coders.Size() > kNumCodersMax || BindPairs.Size() > kNumBindsMax)
return false;
{
CBoolVector v;
BoolVector_Fill_False(v, BindPairs.Size() + PackStreams.Size());
int i;
for (i = 0; i < BindPairs.Size(); i++)
if (BoolVector_GetAndSet(v, BindPairs[i].InIndex))
return false;
for (i = 0; i < PackStreams.Size(); i++)
if (BoolVector_GetAndSet(v, PackStreams[i]))
return false;
BoolVector_Fill_False(v, UnpackSizes.Size());
for (i = 0; i < BindPairs.Size(); i++)
if (BoolVector_GetAndSet(v, BindPairs[i].OutIndex))
return false;
}
UInt32 mask[kMaskSize];
int i;
for (i = 0; i < kMaskSize; i++)
mask[i] = 0;
{
CIntVector inStreamToCoder, outStreamToCoder;
for (i = 0; i < Coders.Size(); i++)
{
CNum j;
const CCoderInfo &coder = Coders[i];
for (j = 0; j < coder.NumInStreams; j++)
inStreamToCoder.Add(i);
for (j = 0; j < coder.NumOutStreams; j++)
outStreamToCoder.Add(i);
}
for (i = 0; i < BindPairs.Size(); i++)
{
const CBindPair &bp = BindPairs[i];
mask[inStreamToCoder[bp.InIndex]] |= (1 << outStreamToCoder[bp.OutIndex]);
}
}
for (i = 0; i < kMaskSize; i++)
for (int j = 0; j < kMaskSize; j++)
if (((1 << j) & mask[i]) != 0)
mask[i] |= mask[j];
for (i = 0; i < kMaskSize; i++)
if (((1 << i) & mask[i]) != 0)
return false;
return true;
}
class CInArchiveException {};
static void ThrowException() { throw CInArchiveException(); }
static inline void ThrowEndOfData() { ThrowException(); }
static inline void ThrowUnsupported() { ThrowException(); }
static inline void ThrowIncorrect() { ThrowException(); }
static inline void ThrowUnsupportedVersion() { ThrowException(); }
/*
class CInArchiveException
{
public:
enum CCauseType
{
kUnsupportedVersion = 0,
kUnsupported,
kIncorrect,
kEndOfData
} Cause;
CInArchiveException(CCauseType cause): Cause(cause) {};
};
static void ThrowException(CInArchiveException::CCauseType c) { throw CInArchiveException(c); }
static void ThrowEndOfData() { ThrowException(CInArchiveException::kEndOfData); }
static void ThrowUnsupported() { ThrowException(CInArchiveException::kUnsupported); }
static void ThrowIncorrect() { ThrowException(CInArchiveException::kIncorrect); }
static void ThrowUnsupportedVersion() { ThrowException(CInArchiveException::kUnsupportedVersion); }
*/
class CStreamSwitch
{
CInArchive *_archive;
bool _needRemove;
public:
CStreamSwitch(): _needRemove(false) {}
~CStreamSwitch() { Remove(); }
void Remove();
void Set(CInArchive *archive, const Byte *data, size_t size);
void Set(CInArchive *archive, const CByteBuffer &byteBuffer);
void Set(CInArchive *archive, const CObjectVector<CByteBuffer> *dataVector);
};
void CStreamSwitch::Remove()
{
if (_needRemove)
{
_archive->DeleteByteStream();
_needRemove = false;
}
}
void CStreamSwitch::Set(CInArchive *archive, const Byte *data, size_t size)
{
Remove();
_archive = archive;
_archive->AddByteStream(data, size);
_needRemove = true;
}
void CStreamSwitch::Set(CInArchive *archive, const CByteBuffer &byteBuffer)
{
Set(archive, byteBuffer, byteBuffer.GetCapacity());
}
void CStreamSwitch::Set(CInArchive *archive, const CObjectVector<CByteBuffer> *dataVector)
{
Remove();
Byte external = archive->ReadByte();
if (external != 0)
{
int dataIndex = (int)archive->ReadNum();
if (dataIndex < 0 || dataIndex >= dataVector->Size())
ThrowIncorrect();
Set(archive, (*dataVector)[dataIndex]);
}
}
Byte CInByte2::ReadByte()
{
if (_pos >= _size)
ThrowEndOfData();
return _buffer[_pos++];
}
void CInByte2::ReadBytes(Byte *data, size_t size)
{
if (size > _size - _pos)
ThrowEndOfData();
for (size_t i = 0; i < size; i++)
data[i] = _buffer[_pos++];
}
void CInByte2::SkipData(UInt64 size)
{
if (size > _size - _pos)
ThrowEndOfData();
_pos += (size_t)size;
}
void CInByte2::SkipData()
{
SkipData(ReadNumber());
}
UInt64 CInByte2::ReadNumber()
{
if (_pos >= _size)
ThrowEndOfData();
Byte firstByte = _buffer[_pos++];
Byte mask = 0x80;
UInt64 value = 0;
for (int i = 0; i < 8; i++)
{
if ((firstByte & mask) == 0)
{
UInt64 highPart = firstByte & (mask - 1);
value += (highPart << (i * 8));
return value;
}
if (_pos >= _size)
ThrowEndOfData();
value |= ((UInt64)_buffer[_pos++] << (8 * i));
mask >>= 1;
}
return value;
}
CNum CInByte2::ReadNum()
{
UInt64 value = ReadNumber();
if (value > kNumMax)
ThrowUnsupported();
return (CNum)value;
}
UInt32 CInByte2::ReadUInt32()
{
if (_pos + 4 > _size)
ThrowEndOfData();
UInt32 res = Get32(_buffer + _pos);
_pos += 4;
return res;
}
UInt64 CInByte2::ReadUInt64()
{
if (_pos + 8 > _size)
ThrowEndOfData();
UInt64 res = Get64(_buffer + _pos);
_pos += 8;
return res;
}
void CInByte2::ReadString(UString &s)
{
const Byte *buf = _buffer + _pos;
size_t rem = (_size - _pos) / 2 * 2;
{
size_t i;
for (i = 0; i < rem; i += 2)
if (buf[i] == 0 && buf[i + 1] == 0)
break;
if (i == rem)
ThrowEndOfData();
rem = i;
}
int len = (int)(rem / 2);
if (len < 0 || (size_t)len * 2 != rem)
ThrowUnsupported();
wchar_t *p = s.GetBuffer(len);
int i;
for (i = 0; i < len; i++, buf += 2)
p[i] = (wchar_t)Get16(buf);
s.ReleaseBuffer(len);
_pos += rem + 2;
}
static inline bool TestSignature(const Byte *p)
{
for (int i = 0; i < kSignatureSize; i++)
if (p[i] != kSignature[i])
return false;
return CrcCalc(p + 12, 20) == GetUi32(p + 8);
}
#ifdef FORMAT_7Z_RECOVERY
static inline bool TestSignature2(const Byte *p)
{
int i;
for (i = 0; i < kSignatureSize; i++)
if (p[i] != kSignature[i])
return false;
if (CrcCalc(p + 12, 20) == GetUi32(p + 8))
return true;
for (i = 8; i < kHeaderSize; i++)
if (p[i] != 0)
return false;
return (p[6] != 0 || p[7] != 0);
}
#else
#define TestSignature2(p) TestSignature(p)
#endif
HRESULT CInArchive::FindAndReadSignature(IInStream *stream, const UInt64 *searchHeaderSizeLimit)
{
RINOK(ReadStream_FALSE(stream, _header, kHeaderSize));
if (TestSignature2(_header))
return S_OK;
CByteBuffer byteBuffer;
const UInt32 kBufferSize = (1 << 16);
byteBuffer.SetCapacity(kBufferSize);
Byte *buffer = byteBuffer;
UInt32 numPrevBytes = kHeaderSize;
memcpy(buffer, _header, kHeaderSize);
UInt64 curTestPos = _arhiveBeginStreamPosition;
for (;;)
{
if (searchHeaderSizeLimit != NULL)
if (curTestPos - _arhiveBeginStreamPosition > *searchHeaderSizeLimit)
break;
do
{
UInt32 numReadBytes = kBufferSize - numPrevBytes;
UInt32 processedSize;
RINOK(stream->Read(buffer + numPrevBytes, numReadBytes, &processedSize));
numPrevBytes += processedSize;
if (processedSize == 0)
return S_FALSE;
}
while (numPrevBytes <= kHeaderSize);
UInt32 numTests = numPrevBytes - kHeaderSize;
for (UInt32 pos = 0; pos < numTests; pos++)
{
for (; buffer[pos] != '7' && pos < numTests; pos++);
if (pos == numTests)
break;
if (TestSignature(buffer + pos))
{
memcpy(_header, buffer + pos, kHeaderSize);
curTestPos += pos;
_arhiveBeginStreamPosition = curTestPos;
return stream->Seek(curTestPos + kHeaderSize, STREAM_SEEK_SET, NULL);
}
}
curTestPos += numTests;
numPrevBytes -= numTests;
memmove(buffer, buffer + numTests, numPrevBytes);
}
return S_FALSE;
}
// S_FALSE means that file is not archive
HRESULT CInArchive::Open(IInStream *stream, const UInt64 *searchHeaderSizeLimit)
{
HeadersSize = 0;
Close();
RINOK(stream->Seek(0, STREAM_SEEK_CUR, &_arhiveBeginStreamPosition))
RINOK(FindAndReadSignature(stream, searchHeaderSizeLimit));
_stream = stream;
return S_OK;
}
void CInArchive::Close()
{
_stream.Release();
}
void CInArchive::ReadArchiveProperties(CInArchiveInfo & /* archiveInfo */)
{
for (;;)
{
if (ReadID() == NID::kEnd)
break;
SkipData();
}
}
void CInArchive::GetNextFolderItem(CFolder &folder)
{
CNum numCoders = ReadNum();
folder.Coders.Clear();
folder.Coders.Reserve((int)numCoders);
CNum numInStreams = 0;
CNum numOutStreams = 0;
CNum i;
for (i = 0; i < numCoders; i++)
{
folder.Coders.Add(CCoderInfo());
CCoderInfo &coder = folder.Coders.Back();
{
Byte mainByte = ReadByte();
int idSize = (mainByte & 0xF);
Byte longID[15];
ReadBytes(longID, idSize);
if (idSize > 8)
ThrowUnsupported();
UInt64 id = 0;
for (int j = 0; j < idSize; j++)
id |= (UInt64)longID[idSize - 1 - j] << (8 * j);
coder.MethodID = id;
if ((mainByte & 0x10) != 0)
{
coder.NumInStreams = ReadNum();
coder.NumOutStreams = ReadNum();
}
else
{
coder.NumInStreams = 1;
coder.NumOutStreams = 1;
}
if ((mainByte & 0x20) != 0)
{
CNum propsSize = ReadNum();
coder.Props.SetCapacity((size_t)propsSize);
ReadBytes((Byte *)coder.Props, (size_t)propsSize);
}
if ((mainByte & 0x80) != 0)
ThrowUnsupported();
}
numInStreams += coder.NumInStreams;
numOutStreams += coder.NumOutStreams;
}
CNum numBindPairs = numOutStreams - 1;
folder.BindPairs.Clear();
folder.BindPairs.Reserve(numBindPairs);
for (i = 0; i < numBindPairs; i++)
{
CBindPair bp;
bp.InIndex = ReadNum();
bp.OutIndex = ReadNum();
folder.BindPairs.Add(bp);
}
if (numInStreams < numBindPairs)
ThrowUnsupported();
CNum numPackStreams = numInStreams - numBindPairs;
folder.PackStreams.Reserve(numPackStreams);
if (numPackStreams == 1)
{
for (i = 0; i < numInStreams; i++)
if (folder.FindBindPairForInStream(i) < 0)
{
folder.PackStreams.Add(i);
break;
}
if (folder.PackStreams.Size() != 1)
ThrowUnsupported();
}
else
for (i = 0; i < numPackStreams; i++)
folder.PackStreams.Add(ReadNum());
}
void CInArchive::WaitAttribute(UInt64 attribute)
{
for (;;)
{
UInt64 type = ReadID();
if (type == attribute)
return;
if (type == NID::kEnd)
ThrowIncorrect();
SkipData();
}
}
void CInArchive::ReadHashDigests(int numItems,
CBoolVector &digestsDefined,
CRecordVector<UInt32> &digests)
{
ReadBoolVector2(numItems, digestsDefined);
digests.Clear();
digests.Reserve(numItems);
for (int i = 0; i < numItems; i++)
{
UInt32 crc = 0;
if (digestsDefined[i])
crc = ReadUInt32();
digests.Add(crc);
}
}
void CInArchive::ReadPackInfo(
UInt64 &dataOffset,
CRecordVector<UInt64> &packSizes,
CBoolVector &packCRCsDefined,
CRecordVector<UInt32> &packCRCs)
{
dataOffset = ReadNumber();
CNum numPackStreams = ReadNum();
WaitAttribute(NID::kSize);
packSizes.Clear();
packSizes.Reserve(numPackStreams);
for (CNum i = 0; i < numPackStreams; i++)
packSizes.Add(ReadNumber());
UInt64 type;
for (;;)
{
type = ReadID();
if (type == NID::kEnd)
break;
if (type == NID::kCRC)
{
ReadHashDigests(numPackStreams, packCRCsDefined, packCRCs);
continue;
}
SkipData();
}
if (packCRCsDefined.IsEmpty())
{
BoolVector_Fill_False(packCRCsDefined, numPackStreams);
packCRCs.Reserve(numPackStreams);
packCRCs.Clear();
for (CNum i = 0; i < numPackStreams; i++)
packCRCs.Add(0);
}
}
void CInArchive::ReadUnpackInfo(
const CObjectVector<CByteBuffer> *dataVector,
CObjectVector<CFolder> &folders)
{
WaitAttribute(NID::kFolder);
CNum numFolders = ReadNum();
{
CStreamSwitch streamSwitch;
streamSwitch.Set(this, dataVector);
folders.Clear();
folders.Reserve(numFolders);
for (CNum i = 0; i < numFolders; i++)
{
folders.Add(CFolder());
GetNextFolderItem(folders.Back());
}
}
WaitAttribute(NID::kCodersUnpackSize);
CNum i;
for (i = 0; i < numFolders; i++)
{
CFolder &folder = folders[i];
CNum numOutStreams = folder.GetNumOutStreams();
folder.UnpackSizes.Reserve(numOutStreams);
for (CNum j = 0; j < numOutStreams; j++)
folder.UnpackSizes.Add(ReadNumber());
}
for (;;)
{
UInt64 type = ReadID();
if (type == NID::kEnd)
return;
if (type == NID::kCRC)
{
CBoolVector crcsDefined;
CRecordVector<UInt32> crcs;
ReadHashDigests(numFolders, crcsDefined, crcs);
for (i = 0; i < numFolders; i++)
{
CFolder &folder = folders[i];
folder.UnpackCRCDefined = crcsDefined[i];
folder.UnpackCRC = crcs[i];
}
continue;
}
SkipData();
}
}
void CInArchive::ReadSubStreamsInfo(
const CObjectVector<CFolder> &folders,
CRecordVector<CNum> &numUnpackStreamsInFolders,
CRecordVector<UInt64> &unpackSizes,
CBoolVector &digestsDefined,
CRecordVector<UInt32> &digests)
{
numUnpackStreamsInFolders.Clear();
numUnpackStreamsInFolders.Reserve(folders.Size());
UInt64 type;
for (;;)
{
type = ReadID();
if (type == NID::kNumUnpackStream)
{
for (int i = 0; i < folders.Size(); i++)
numUnpackStreamsInFolders.Add(ReadNum());
continue;
}
if (type == NID::kCRC || type == NID::kSize)
break;
if (type == NID::kEnd)
break;
SkipData();
}
if (numUnpackStreamsInFolders.IsEmpty())
for (int i = 0; i < folders.Size(); i++)
numUnpackStreamsInFolders.Add(1);
int i;
for (i = 0; i < numUnpackStreamsInFolders.Size(); i++)
{
// v3.13 incorrectly worked with empty folders
// v4.07: we check that folder is empty
CNum numSubstreams = numUnpackStreamsInFolders[i];
if (numSubstreams == 0)
continue;
UInt64 sum = 0;
for (CNum j = 1; j < numSubstreams; j++)
if (type == NID::kSize)
{
UInt64 size = ReadNumber();
unpackSizes.Add(size);
sum += size;
}
unpackSizes.Add(folders[i].GetUnpackSize() - sum);
}
if (type == NID::kSize)
type = ReadID();
int numDigests = 0;
int numDigestsTotal = 0;
for (i = 0; i < folders.Size(); i++)
{
CNum numSubstreams = numUnpackStreamsInFolders[i];
if (numSubstreams != 1 || !folders[i].UnpackCRCDefined)
numDigests += numSubstreams;
numDigestsTotal += numSubstreams;
}
for (;;)
{
if (type == NID::kCRC)
{
CBoolVector digestsDefined2;
CRecordVector<UInt32> digests2;
ReadHashDigests(numDigests, digestsDefined2, digests2);
int digestIndex = 0;
for (i = 0; i < folders.Size(); i++)
{
CNum numSubstreams = numUnpackStreamsInFolders[i];
const CFolder &folder = folders[i];
if (numSubstreams == 1 && folder.UnpackCRCDefined)
{
digestsDefined.Add(true);
digests.Add(folder.UnpackCRC);
}
else
for (CNum j = 0; j < numSubstreams; j++, digestIndex++)
{
digestsDefined.Add(digestsDefined2[digestIndex]);
digests.Add(digests2[digestIndex]);
}
}
}
else if (type == NID::kEnd)
{
if (digestsDefined.IsEmpty())
{
BoolVector_Fill_False(digestsDefined, numDigestsTotal);
digests.Clear();
for (int i = 0; i < numDigestsTotal; i++)
digests.Add(0);
}
return;
}
else
SkipData();
type = ReadID();
}
}
void CInArchive::ReadStreamsInfo(
const CObjectVector<CByteBuffer> *dataVector,
UInt64 &dataOffset,
CRecordVector<UInt64> &packSizes,
CBoolVector &packCRCsDefined,
CRecordVector<UInt32> &packCRCs,
CObjectVector<CFolder> &folders,
CRecordVector<CNum> &numUnpackStreamsInFolders,
CRecordVector<UInt64> &unpackSizes,
CBoolVector &digestsDefined,
CRecordVector<UInt32> &digests)
{
for (;;)
{
UInt64 type = ReadID();
if (type > ((UInt32)1 << 30))
ThrowIncorrect();
switch((UInt32)type)
{
case NID::kEnd:
return;
case NID::kPackInfo:
{
ReadPackInfo(dataOffset, packSizes, packCRCsDefined, packCRCs);
break;
}
case NID::kUnpackInfo:
{
ReadUnpackInfo(dataVector, folders);
break;
}
case NID::kSubStreamsInfo:
{
ReadSubStreamsInfo(folders, numUnpackStreamsInFolders,
unpackSizes, digestsDefined, digests);
break;
}
default:
ThrowIncorrect();
}
}
}
void CInArchive::ReadBoolVector(int numItems, CBoolVector &v)
{
v.Clear();
v.Reserve(numItems);
Byte b = 0;
Byte mask = 0;
for (int i = 0; i < numItems; i++)
{
if (mask == 0)
{
b = ReadByte();
mask = 0x80;
}
v.Add((b & mask) != 0);
mask >>= 1;
}
}
void CInArchive::ReadBoolVector2(int numItems, CBoolVector &v)
{
Byte allAreDefined = ReadByte();
if (allAreDefined == 0)
{
ReadBoolVector(numItems, v);
return;
}
v.Clear();
v.Reserve(numItems);
for (int i = 0; i < numItems; i++)
v.Add(true);
}
void CInArchive::ReadUInt64DefVector(const CObjectVector<CByteBuffer> &dataVector,
CUInt64DefVector &v, int numFiles)
{
ReadBoolVector2(numFiles, v.Defined);
CStreamSwitch streamSwitch;
streamSwitch.Set(this, &dataVector);
v.Values.Reserve(numFiles);
for (int i = 0; i < numFiles; i++)
{
UInt64 t = 0;
if (v.Defined[i])
t = ReadUInt64();
v.Values.Add(t);
}
}
HRESULT CInArchive::ReadAndDecodePackedStreams(
DECL_EXTERNAL_CODECS_LOC_VARS
UInt64 baseOffset,
UInt64 &dataOffset, CObjectVector<CByteBuffer> &dataVector
#ifndef _NO_CRYPTO
, ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
)
{
CRecordVector<UInt64> packSizes;
CBoolVector packCRCsDefined;
CRecordVector<UInt32> packCRCs;
CObjectVector<CFolder> folders;
CRecordVector<CNum> numUnpackStreamsInFolders;
CRecordVector<UInt64> unpackSizes;
CBoolVector digestsDefined;
CRecordVector<UInt32> digests;
ReadStreamsInfo(NULL,
dataOffset,
packSizes,
packCRCsDefined,
packCRCs,
folders,
numUnpackStreamsInFolders,
unpackSizes,
digestsDefined,
digests);
// db.ArchiveInfo.DataStartPosition2 += db.ArchiveInfo.StartPositionAfterHeader;
CNum packIndex = 0;
CDecoder decoder(
#ifdef _ST_MODE
false
#else
true
#endif
);
UInt64 dataStartPos = baseOffset + dataOffset;
for (int i = 0; i < folders.Size(); i++)
{
const CFolder &folder = folders[i];
dataVector.Add(CByteBuffer());
CByteBuffer &data = dataVector.Back();
UInt64 unpackSize64 = folder.GetUnpackSize();
size_t unpackSize = (size_t)unpackSize64;
if (unpackSize != unpackSize64)
ThrowUnsupported();
data.SetCapacity(unpackSize);
CBufPtrSeqOutStream *outStreamSpec = new CBufPtrSeqOutStream;
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
outStreamSpec->Init(data, unpackSize);
HRESULT result = decoder.Decode(
EXTERNAL_CODECS_LOC_VARS
_stream, dataStartPos,
&packSizes[packIndex], folder, outStream, NULL
#ifndef _NO_CRYPTO
, getTextPassword, passwordIsDefined
#endif
#if !defined(_7ZIP_ST) && !defined(_SFX)
, false, 1
#endif
);
RINOK(result);
if (folder.UnpackCRCDefined)
if (CrcCalc(data, unpackSize) != folder.UnpackCRC)
ThrowIncorrect();
for (int j = 0; j < folder.PackStreams.Size(); j++)
{
UInt64 packSize = packSizes[packIndex++];
dataStartPos += packSize;
HeadersSize += packSize;
}
}
return S_OK;
}
HRESULT CInArchive::ReadHeader(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
, ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
)
{
UInt64 type = ReadID();
if (type == NID::kArchiveProperties)
{
ReadArchiveProperties(db.ArchiveInfo);
type = ReadID();
}
CObjectVector<CByteBuffer> dataVector;
if (type == NID::kAdditionalStreamsInfo)
{
HRESULT result = ReadAndDecodePackedStreams(
EXTERNAL_CODECS_LOC_VARS
db.ArchiveInfo.StartPositionAfterHeader,
db.ArchiveInfo.DataStartPosition2,
dataVector
#ifndef _NO_CRYPTO
, getTextPassword, passwordIsDefined
#endif
);
RINOK(result);
db.ArchiveInfo.DataStartPosition2 += db.ArchiveInfo.StartPositionAfterHeader;
type = ReadID();
}
CRecordVector<UInt64> unpackSizes;
CBoolVector digestsDefined;
CRecordVector<UInt32> digests;
if (type == NID::kMainStreamsInfo)
{
ReadStreamsInfo(&dataVector,
db.ArchiveInfo.DataStartPosition,
db.PackSizes,
db.PackCRCsDefined,
db.PackCRCs,
db.Folders,
db.NumUnpackStreamsVector,
unpackSizes,
digestsDefined,
digests);
db.ArchiveInfo.DataStartPosition += db.ArchiveInfo.StartPositionAfterHeader;
type = ReadID();
}
else
{
for (int i = 0; i < db.Folders.Size(); i++)
{
db.NumUnpackStreamsVector.Add(1);
CFolder &folder = db.Folders[i];
unpackSizes.Add(folder.GetUnpackSize());
digestsDefined.Add(folder.UnpackCRCDefined);
digests.Add(folder.UnpackCRC);
}
}
db.Files.Clear();
if (type == NID::kEnd)
return S_OK;
if (type != NID::kFilesInfo)
ThrowIncorrect();
CNum numFiles = ReadNum();
db.Files.Reserve(numFiles);
CNum i;
for (i = 0; i < numFiles; i++)
db.Files.Add(CFileItem());
db.ArchiveInfo.FileInfoPopIDs.Add(NID::kSize);
if (!db.PackSizes.IsEmpty())
db.ArchiveInfo.FileInfoPopIDs.Add(NID::kPackInfo);
if (numFiles > 0 && !digests.IsEmpty())
db.ArchiveInfo.FileInfoPopIDs.Add(NID::kCRC);
CBoolVector emptyStreamVector;
BoolVector_Fill_False(emptyStreamVector, (int)numFiles);
CBoolVector emptyFileVector;
CBoolVector antiFileVector;
CNum numEmptyStreams = 0;
for (;;)
{
UInt64 type = ReadID();
if (type == NID::kEnd)
break;
UInt64 size = ReadNumber();
size_t ppp = _inByteBack->_pos;
bool addPropIdToList = true;
bool isKnownType = true;
if (type > ((UInt32)1 << 30))
isKnownType = false;
else switch((UInt32)type)
{
case NID::kName:
{
CStreamSwitch streamSwitch;
streamSwitch.Set(this, &dataVector);
for (int i = 0; i < db.Files.Size(); i++)
_inByteBack->ReadString(db.Files[i].Name);
break;
}
case NID::kWinAttributes:
{
CBoolVector boolVector;
ReadBoolVector2(db.Files.Size(), boolVector);
CStreamSwitch streamSwitch;
streamSwitch.Set(this, &dataVector);
for (i = 0; i < numFiles; i++)
{
CFileItem &file = db.Files[i];
file.AttribDefined = boolVector[i];
if (file.AttribDefined)
file.Attrib = ReadUInt32();
}
break;
}
case NID::kEmptyStream:
{
ReadBoolVector(numFiles, emptyStreamVector);
for (i = 0; i < (CNum)emptyStreamVector.Size(); i++)
if (emptyStreamVector[i])
numEmptyStreams++;
BoolVector_Fill_False(emptyFileVector, numEmptyStreams);
BoolVector_Fill_False(antiFileVector, numEmptyStreams);
break;
}
case NID::kEmptyFile: ReadBoolVector(numEmptyStreams, emptyFileVector); break;
case NID::kAnti: ReadBoolVector(numEmptyStreams, antiFileVector); break;
case NID::kStartPos: ReadUInt64DefVector(dataVector, db.StartPos, (int)numFiles); break;
case NID::kCTime: ReadUInt64DefVector(dataVector, db.CTime, (int)numFiles); break;
case NID::kATime: ReadUInt64DefVector(dataVector, db.ATime, (int)numFiles); break;
case NID::kMTime: ReadUInt64DefVector(dataVector, db.MTime, (int)numFiles); break;
case NID::kDummy:
{
for (UInt64 j = 0; j < size; j++)
if (ReadByte() != 0)
ThrowIncorrect();
addPropIdToList = false;
break;
}
default:
addPropIdToList = isKnownType = false;
}
if (isKnownType)
{
if(addPropIdToList)
db.ArchiveInfo.FileInfoPopIDs.Add(type);
}
else
SkipData(size);
bool checkRecordsSize = (db.ArchiveInfo.Version.Major > 0 ||
db.ArchiveInfo.Version.Minor > 2);
if (checkRecordsSize && _inByteBack->_pos - ppp != size)
ThrowIncorrect();
}
CNum emptyFileIndex = 0;
CNum sizeIndex = 0;
CNum numAntiItems = 0;
for (i = 0; i < numEmptyStreams; i++)
if (antiFileVector[i])
numAntiItems++;
for (i = 0; i < numFiles; i++)
{
CFileItem &file = db.Files[i];
bool isAnti;
file.HasStream = !emptyStreamVector[i];
if (file.HasStream)
{
file.IsDir = false;
isAnti = false;
file.Size = unpackSizes[sizeIndex];
file.Crc = digests[sizeIndex];
file.CrcDefined = digestsDefined[sizeIndex];
sizeIndex++;
}
else
{
file.IsDir = !emptyFileVector[emptyFileIndex];
isAnti = antiFileVector[emptyFileIndex];
emptyFileIndex++;
file.Size = 0;
file.CrcDefined = false;
}
if (numAntiItems != 0)
db.IsAnti.Add(isAnti);
}
return S_OK;
}
void CArchiveDatabaseEx::FillFolderStartPackStream()
{
FolderStartPackStreamIndex.Clear();
FolderStartPackStreamIndex.Reserve(Folders.Size());
CNum startPos = 0;
for (int i = 0; i < Folders.Size(); i++)
{
FolderStartPackStreamIndex.Add(startPos);
startPos += (CNum)Folders[i].PackStreams.Size();
}
}
void CArchiveDatabaseEx::FillStartPos()
{
PackStreamStartPositions.Clear();
PackStreamStartPositions.Reserve(PackSizes.Size());
UInt64 startPos = 0;
for (int i = 0; i < PackSizes.Size(); i++)
{
PackStreamStartPositions.Add(startPos);
startPos += PackSizes[i];
}
}
void CArchiveDatabaseEx::FillFolderStartFileIndex()
{
FolderStartFileIndex.Clear();
FolderStartFileIndex.Reserve(Folders.Size());
FileIndexToFolderIndexMap.Clear();
FileIndexToFolderIndexMap.Reserve(Files.Size());
int folderIndex = 0;
CNum indexInFolder = 0;
for (int i = 0; i < Files.Size(); i++)
{
const CFileItem &file = Files[i];
bool emptyStream = !file.HasStream;
if (emptyStream && indexInFolder == 0)
{
FileIndexToFolderIndexMap.Add(kNumNoIndex);
continue;
}
if (indexInFolder == 0)
{
// v3.13 incorrectly worked with empty folders
// v4.07: Loop for skipping empty folders
for (;;)
{
if (folderIndex >= Folders.Size())
ThrowIncorrect();
FolderStartFileIndex.Add(i); // check it
if (NumUnpackStreamsVector[folderIndex] != 0)
break;
folderIndex++;
}
}
FileIndexToFolderIndexMap.Add(folderIndex);
if (emptyStream)
continue;
indexInFolder++;
if (indexInFolder >= NumUnpackStreamsVector[folderIndex])
{
folderIndex++;
indexInFolder = 0;
}
}
}
HRESULT CInArchive::ReadDatabase2(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
, ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
)
{
db.Clear();
db.ArchiveInfo.StartPosition = _arhiveBeginStreamPosition;
db.ArchiveInfo.Version.Major = _header[6];
db.ArchiveInfo.Version.Minor = _header[7];
if (db.ArchiveInfo.Version.Major != kMajorVersion)
ThrowUnsupportedVersion();
UInt32 crcFromArchive = Get32(_header + 8);
UInt64 nextHeaderOffset = Get64(_header + 0xC);
UInt64 nextHeaderSize = Get64(_header + 0x14);
UInt32 nextHeaderCRC = Get32(_header + 0x1C);
UInt32 crc = CrcCalc(_header + 0xC, 20);
#ifdef FORMAT_7Z_RECOVERY
if (crcFromArchive == 0 && nextHeaderOffset == 0 && nextHeaderSize == 0 && nextHeaderCRC == 0)
{
UInt64 cur, cur2;
RINOK(_stream->Seek(0, STREAM_SEEK_CUR, &cur));
const int kCheckSize = 500;
Byte buf[kCheckSize];
RINOK(_stream->Seek(0, STREAM_SEEK_END, &cur2));
int checkSize = kCheckSize;
if (cur2 - cur < kCheckSize)
checkSize = (int)(cur2 - cur);
RINOK(_stream->Seek(-checkSize, STREAM_SEEK_END, &cur2));
RINOK(ReadStream_FALSE(_stream, buf, (size_t)checkSize));
int i;
for (i = (int)checkSize - 2; i >= 0; i--)
if (buf[i] == 0x17 && buf[i + 1] == 0x6 || buf[i] == 0x01 && buf[i + 1] == 0x04)
break;
if (i < 0)
return S_FALSE;
nextHeaderSize = checkSize - i;
nextHeaderOffset = cur2 - cur + i;
nextHeaderCRC = CrcCalc(buf + i, (size_t)nextHeaderSize);
RINOK(_stream->Seek(cur, STREAM_SEEK_SET, NULL));
}
else
#endif
{
if (crc != crcFromArchive)
ThrowIncorrect();
}
db.ArchiveInfo.StartPositionAfterHeader = _arhiveBeginStreamPosition + kHeaderSize;
if (nextHeaderSize == 0)
return S_OK;
if (nextHeaderSize > (UInt64)0xFFFFFFFF)
return S_FALSE;
if ((Int64)nextHeaderOffset < 0)
return S_FALSE;
RINOK(_stream->Seek(nextHeaderOffset, STREAM_SEEK_CUR, NULL));
CByteBuffer buffer2;
buffer2.SetCapacity((size_t)nextHeaderSize);
RINOK(ReadStream_FALSE(_stream, buffer2, (size_t)nextHeaderSize));
HeadersSize += kHeaderSize + nextHeaderSize;
db.PhySize = kHeaderSize + nextHeaderOffset + nextHeaderSize;
if (CrcCalc(buffer2, (UInt32)nextHeaderSize) != nextHeaderCRC)
ThrowIncorrect();
CStreamSwitch streamSwitch;
streamSwitch.Set(this, buffer2);
CObjectVector<CByteBuffer> dataVector;
UInt64 type = ReadID();
if (type != NID::kHeader)
{
if (type != NID::kEncodedHeader)
ThrowIncorrect();
HRESULT result = ReadAndDecodePackedStreams(
EXTERNAL_CODECS_LOC_VARS
db.ArchiveInfo.StartPositionAfterHeader,
db.ArchiveInfo.DataStartPosition2,
dataVector
#ifndef _NO_CRYPTO
, getTextPassword, passwordIsDefined
#endif
);
RINOK(result);
if (dataVector.Size() == 0)
return S_OK;
if (dataVector.Size() > 1)
ThrowIncorrect();
streamSwitch.Remove();
streamSwitch.Set(this, dataVector.Front());
if (ReadID() != NID::kHeader)
ThrowIncorrect();
}
db.HeadersSize = HeadersSize;
return ReadHeader(
EXTERNAL_CODECS_LOC_VARS
db
#ifndef _NO_CRYPTO
, getTextPassword, passwordIsDefined
#endif
);
}
HRESULT CInArchive::ReadDatabase(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
, ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
)
{
try
{
return ReadDatabase2(
EXTERNAL_CODECS_LOC_VARS db
#ifndef _NO_CRYPTO
, getTextPassword, passwordIsDefined
#endif
);
}
catch(CInArchiveException &) { return S_FALSE; }
}
}}