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829409452d85cd6dd9dfc9151f109d6e13a2bb1c
easy7zip/CPP/7zip/Archive/PeHandler.cpp
Igor Pavlov 829409452d 9.04 beta
2016-05-28 00:15:59 +01:00

913 lines
22 KiB
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// PeHandler.cpp
#include "StdAfx.h"
#include "../../../C/CpuArch.h"
#include "Common/Buffer.h"
#include "Common/ComTry.h"
#include "Common/IntToString.h"
#include "Windows/PropVariantUtils.h"
#include "Windows/Time.h"
#include "../Common/LimitedStreams.h"
#include "../Common/ProgressUtils.h"
#include "../Common/RegisterArc.h"
#include "../Common/StreamUtils.h"
#include "../Compress/CopyCoder.h"
#define Get16(p) GetUi16(p)
#define Get32(p) GetUi32(p)
#define Get64(p) GetUi64(p)
using namespace NWindows;
namespace NArchive {
namespace NPe {
#define NUM_SCAN_SECTIONS_MAX (1 << 6)
#define PE_SIG 0x00004550
#define PE_OptHeader_Magic_32 0x10B
#define PE_OptHeader_Magic_64 0x20B
static AString GetDecString(UInt32 v)
{
char sz[32];
ConvertUInt64ToString(v, sz);
return sz;
}
struct CVersion
{
UInt16 Major;
UInt16 Minor;
void Parse(const Byte *buf);
AString GetString() const { return GetDecString(Major) + '.' + GetDecString(Minor); }
};
void CVersion::Parse(const Byte *p)
{
Major = Get16(p);
Minor = Get16(p + 2);
}
static const UInt32 kHeaderSize = 4 + 20;
struct CHeader
{
UInt16 NumSections;
UInt32 Time;
UInt32 PointerToSymbolTable;
UInt32 NumSymbols;
UInt16 OptHeaderSize;
UInt16 Flags;
UInt16 Machine;
bool Parse(const Byte *buf);
};
bool CHeader::Parse(const Byte *p)
{
if (Get32(p) != PE_SIG)
return false;
p += 4;
Machine = Get16(p + 0);
NumSections = Get16(p + 2);
Time = Get32(p + 4);
PointerToSymbolTable = Get32(p + 8);
NumSymbols = Get32(p + 12);
OptHeaderSize = Get16(p + 16);
Flags = Get16(p + 18);
return true;
}
struct CDirLink
{
UInt32 Va;
UInt32 Size;
void Parse(const Byte *p);
};
void CDirLink::Parse(const Byte *p)
{
Va = Get32(p);
Size = Get32(p + 4);
};
enum
{
kDirLink_Certificate = 4,
kDirLink_Debug = 6
};
struct CDebugEntry
{
UInt32 Flags;
UInt32 Time;
CVersion Ver;
UInt32 Type;
UInt32 Size;
UInt32 Va;
UInt32 Pa;
void Parse(const Byte *p);
};
void CDebugEntry::Parse(const Byte *p)
{
Flags = Get32(p);
Time = Get32(p + 4);
Ver.Parse(p + 8);
Type = Get32(p + 12);
Size = Get32(p + 16);
Va = Get32(p + 20);
Pa = Get32(p + 24);
}
static const UInt32 kNumDirItemsMax = 16;
struct COptHeader
{
UInt16 Magic;
Byte LinkerVerMajor;
Byte LinkerVerMinor;
UInt32 CodeSize;
UInt32 InitDataSize;
UInt32 UninitDataSize;
// UInt32 AddressOfEntryPoint;
// UInt32 BaseOfCode;
// UInt32 BaseOfData32;
// UInt64 ImageBase;
UInt32 SectAlign;
UInt32 FileAlign;
CVersion OsVer;
CVersion ImageVer;
CVersion SubsysVer;
UInt32 ImageSize;
UInt32 HeadersSize;
UInt32 CheckSum;
UInt16 SubSystem;
UInt16 DllCharacts;
UInt64 StackReserve;
UInt64 StackCommit;
UInt64 HeapReserve;
UInt64 HeapCommit;
UInt32 NumDirItems;
CDirLink DirItems[kNumDirItemsMax];
bool Is64Bit() const { return Magic == PE_OptHeader_Magic_64; }
bool Parse(const Byte *p, UInt32 size);
};
bool COptHeader::Parse(const Byte *p, UInt32 size)
{
Magic = Get16(p);
switch (Magic)
{
case PE_OptHeader_Magic_32:
case PE_OptHeader_Magic_64:
break;
default:
return false;
}
LinkerVerMajor = p[2];
LinkerVerMinor = p[3];
bool hdr64 = Is64Bit();
CodeSize = Get32(p + 4);
InitDataSize = Get32(p + 8);
UninitDataSize = Get32(p + 12);
// AddressOfEntryPoint = Get32(p + 16);
// BaseOfCode = Get32(p + 20);
// BaseOfData32 = Get32(p + 24);
// ImageBase = hdr64 ? GetUi64(p + 24) :Get32(p + 28);
SectAlign = Get32(p + 32);
FileAlign = Get32(p + 36);
OsVer.Parse(p + 40);
ImageVer.Parse(p + 44);
SubsysVer.Parse(p + 48);
// reserved = Get32(p + 52);
ImageSize = Get32(p + 56);
HeadersSize = Get32(p + 60);
CheckSum = Get32(p + 64);
SubSystem = Get16(p + 68);
DllCharacts = Get16(p + 70);
if (hdr64)
{
StackReserve = Get64(p + 72);
StackCommit = Get64(p + 80);
HeapReserve = Get64(p + 88);
HeapCommit = Get64(p + 96);
}
else
{
StackReserve = Get32(p + 72);
StackCommit = Get32(p + 76);
HeapReserve = Get32(p + 80);
HeapCommit = Get32(p + 84);
}
UInt32 pos = (hdr64 ? 108 : 92);
NumDirItems = Get32(p + pos);
pos += 4;
if (pos + 8 * NumDirItems != size)
return false;
for (UInt32 i = 0; i < NumDirItems && i < kNumDirItemsMax; i++)
DirItems[i].Parse(p + pos + i * 8);
return true;
}
static const UInt32 kSectionSize = 40;
struct CSection
{
AString Name;
UInt32 VSize;
UInt32 Va;
UInt32 PSize;
UInt32 Pa;
UInt32 Flags;
UInt32 Time;
// UInt16 NumRelocs;
bool IsDebug;
bool IsRealSect;
CSection(): IsRealSect(false), IsDebug(false) {}
UInt64 GetPackSize() const { return PSize; }
void UpdateTotalSize(UInt32 &totalSize)
{
UInt32 t = Pa + PSize;
if (t > totalSize)
totalSize = t;
}
void Parse(const Byte *p);
};
static bool operator <(const CSection &a1, const CSection &a2) { return (a1.Pa < a2.Pa); }
static bool operator ==(const CSection &a1, const CSection &a2) { return (a1.Pa == a2.Pa); }
static AString GetName(const Byte *name)
{
const int kNameSize = 8;
AString res;
char *p = res.GetBuffer(kNameSize);
memcpy(p, name, kNameSize);
p[kNameSize] = 0;
res.ReleaseBuffer();
return res;
}
void CSection::Parse(const Byte *p)
{
Name = GetName(p);
VSize = Get32(p + 8);
Va = Get32(p + 12);
PSize = Get32(p + 16);
Pa = Get32(p + 20);
// NumRelocs = Get16(p + 32);
Flags = Get32(p + 36);
}
static const CUInt32PCharPair g_HeaderCharacts[] =
{
{ 1 << 1, "Executable" },
{ 1 << 13, "DLL" },
{ 1 << 8, "32-bit" },
{ 1 << 5, "LargeAddress" },
{ 1 << 0, "NoRelocs" },
{ 1 << 2, "NoLineNums" },
{ 1 << 3, "NoLocalSyms" },
{ 1 << 4, "AggressiveWsTrim" },
{ 1 << 9, "NoDebugInfo" },
{ 1 << 10, "RemovableRun" },
{ 1 << 11, "NetRun" },
{ 1 << 12, "System" },
{ 1 << 14, "UniCPU" },
{ 1 << 7, "Little-Endian" },
{ 1 << 15, "Big-Endian" }
};
static const CUInt32PCharPair g_DllCharacts[] =
{
{ 1 << 6, "Relocated" },
{ 1 << 7, "Integrity" },
{ 1 << 8, "NX-Compatible" },
{ 1 << 9, "NoIsolation" },
{ 1 << 10, "NoSEH" },
{ 1 << 11, "NoBind" },
{ 1 << 13, "WDM" },
{ 1 << 15, "TerminalServerAware" }
};
static const CUInt32PCharPair g_SectFlags[] =
{
{ 1 << 3, "NoPad" },
{ 1 << 5, "Code" },
{ 1 << 6, "InitializedData" },
{ 1 << 7, "UninitializedData" },
{ 1 << 9, "Comments" },
{ 1 << 11, "Remove" },
{ 1 << 12, "COMDAT" },
{ 1 << 15, "GP" },
{ 1 << 24, "ExtendedRelocations" },
{ 1 << 25, "Discardable" },
{ 1 << 26, "NotCached" },
{ 1 << 27, "NotPaged" },
{ 1 << 28, "Shared" },
{ 1 << 29, "Execute" },
{ 1 << 30, "Read" },
{ (UInt32)1 << 31, "Write" }
};
static const CUInt32PCharPair g_MachinePairs[] =
{
{ 0x014C, "x86" },
{ 0x0162, "MIPS-R3000" },
{ 0x0166, "MIPS-R4000" },
{ 0x0168, "MIPS-R10000" },
{ 0x0169, "MIPS-V2" },
{ 0x0184, "Alpha" },
{ 0x01A2, "SH3" },
{ 0x01A3, "SH3-DSP" },
{ 0x01A4, "SH3E" },
{ 0x01A6, "SH4" },
{ 0x01A8, "SH5" },
{ 0x01C0, "ARM" },
{ 0x01C2, "ARM-Thumb" },
{ 0x01F0, "PPC" },
{ 0x01F1, "PPC-FP" },
{ 0x0200, "IA-64" },
{ 0x0284, "Alpha-64" },
{ 0x0200, "IA-64" },
{ 0x0366, "MIPSFPU" },
{ 0x8664, "x64" },
{ 0x0EBC, "EFI" }
};
static const CUInt32PCharPair g_SubSystems[] =
{
{ 0, "Unknown" },
{ 1, "Native" },
{ 2, "Windows GUI" },
{ 3, "Windows CUI" },
{ 7, "Posix" },
{ 9, "Windows CE" },
{ 10, "EFI" },
{ 11, "EFI Boot" },
{ 12, "EFI Runtime" },
{ 13, "EFI ROM" },
{ 14, "XBOX" }
};
class CHandler:
public IInArchive,
public CMyUnknownImp
{
CMyComPtr<IInStream> _inStream;
CObjectVector<CSection> _sections;
UInt32 _peOffset;
CHeader _header;
COptHeader _optHeader;
UInt32 _totalSize;
UInt32 _totalSizeLimited;
HRESULT LoadDebugSections(IInStream *stream, bool &thereIsSection);
HRESULT Open2(IInStream *stream);
bool Parse(const Byte *buf, UInt32 size);
public:
MY_UNKNOWN_IMP1(IInArchive)
INTERFACE_IInArchive(;)
};
bool CHandler::Parse(const Byte *buf, UInt32 size)
{
UInt32 i;
if (size < 512)
return false;
_peOffset = Get32(buf + 0x3C);
if (_peOffset >= 0x1000 || _peOffset + 512 > size || (_peOffset & 7) != 0)
return false;
UInt32 pos = _peOffset;
if (!_header.Parse(buf + pos))
return false;
if (_header.OptHeaderSize > 512 || _header.NumSections > NUM_SCAN_SECTIONS_MAX)
return false;
pos += kHeaderSize;
if (!_optHeader.Parse(buf + pos, _header.OptHeaderSize))
return false;
pos += _header.OptHeaderSize;
_totalSize = pos;
for (i = 0; i < _header.NumSections; i++, pos += kSectionSize)
{
CSection sect;
if (pos + kSectionSize > size)
return false;
sect.Parse(buf + pos);
sect.IsRealSect = true;
sect.UpdateTotalSize(_totalSize);
_sections.Add(sect);
}
return true;
}
enum
{
kpidSectAlign = kpidUserDefined,
kpidFileAlign,
kpidLinkerVer,
kpidOsVer,
kpidImageVer,
kpidSubsysVer,
kpidCodeSize,
kpidImageSize,
kpidInitDataSize,
kpidUnInitDataSize,
kpidHeadersSizeUnInitDataSize,
kpidSubSystem,
kpidDllCharacts,
kpidStackReserve,
kpidStackCommit,
kpidHeapReserve,
kpidHeapCommit,
};
STATPROPSTG kArcProps[] =
{
{ NULL, kpidCpu, VT_BSTR},
{ NULL, kpidBit64, VT_BOOL},
{ NULL, kpidCharacts, VT_BSTR},
{ NULL, kpidCTime, VT_FILETIME},
{ NULL, kpidPhySize, VT_UI4},
{ NULL, kpidHeadersSize, VT_UI4},
{ NULL, kpidChecksum, VT_UI4},
{ L"Image Size", kpidImageSize, VT_UI4},
{ L"Section Alignment", kpidSectAlign, VT_UI4},
{ L"File Alignment", kpidFileAlign, VT_UI4},
{ L"Code Size", kpidCodeSize, VT_UI4},
{ L"Initialized Data Size", kpidInitDataSize, VT_UI4},
{ L"Uninitialized Data Size", kpidUnInitDataSize, VT_UI4},
{ L"Linker Version", kpidLinkerVer, VT_BSTR},
{ L"OS Version", kpidOsVer, VT_BSTR},
{ L"Image Version", kpidImageVer, VT_BSTR},
{ L"Subsystem Version", kpidSubsysVer, VT_BSTR},
{ L"Subsystem", kpidSubSystem, VT_BSTR},
{ L"DLL Characteristics", kpidDllCharacts, VT_BSTR},
{ L"Stack Reserve", kpidStackReserve, VT_UI8},
{ L"Stack Commit", kpidStackCommit, VT_UI8},
{ L"Heap Reserve", kpidHeapReserve, VT_UI8},
{ L"Heap Commit", kpidHeapCommit, VT_UI8},
};
STATPROPSTG kProps[] =
{
{ NULL, kpidPath, VT_BSTR},
{ NULL, kpidSize, VT_UI8},
{ NULL, kpidPackSize, VT_UI8},
{ NULL, kpidCharacts, VT_BSTR},
{ NULL, kpidOffset, VT_UI8},
{ NULL, kpidVa, VT_UI8}
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps_WITH_NAME
static void VerToProp(const CVersion &v, NCOM::CPropVariant &prop)
{
StringToProp(v.GetString(), prop);
}
void TimeToProp(UInt32 unixTime, NCOM::CPropVariant &prop)
{
if (unixTime != 0)
{
FILETIME ft;
NTime::UnixTimeToFileTime(unixTime, ft);
prop = ft;
}
}
STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
switch(propID)
{
case kpidSectAlign: prop = _optHeader.SectAlign; break;
case kpidFileAlign: prop = _optHeader.FileAlign; break;
case kpidLinkerVer:
{
CVersion v = { _optHeader.LinkerVerMajor, _optHeader.LinkerVerMinor };
VerToProp(v, prop); break;
break;
}
case kpidOsVer: VerToProp(_optHeader.OsVer, prop); break;
case kpidImageVer: VerToProp(_optHeader.ImageVer, prop); break;
case kpidSubsysVer: VerToProp(_optHeader.SubsysVer, prop); break;
case kpidCodeSize: prop = _optHeader.CodeSize; break;
case kpidInitDataSize: prop = _optHeader.InitDataSize; break;
case kpidUnInitDataSize: prop = _optHeader.UninitDataSize; break;
case kpidImageSize: prop = _optHeader.ImageSize; break;
case kpidPhySize: prop = _totalSize; break;
case kpidHeadersSize: prop = _optHeader.HeadersSize; break;
case kpidChecksum: prop = _optHeader.CheckSum; break;
case kpidCpu: PAIR_TO_PROP(g_MachinePairs, _header.Machine, prop); break;
case kpidBit64: if (_optHeader.Is64Bit()) prop = true; break;
case kpidSubSystem: PAIR_TO_PROP(g_SubSystems, _optHeader.SubSystem, prop); break;
case kpidMTime:
case kpidCTime: TimeToProp(_header.Time, prop); break;
case kpidCharacts: FLAGS_TO_PROP(g_HeaderCharacts, _header.Flags, prop); break;
case kpidDllCharacts: FLAGS_TO_PROP(g_DllCharacts, _optHeader.DllCharacts, prop); break;
case kpidStackReserve: prop = _optHeader.StackReserve; break;
case kpidStackCommit: prop = _optHeader.StackCommit; break;
case kpidHeapReserve: prop = _optHeader.HeapReserve; break;
case kpidHeapCommit: prop = _optHeader.HeapCommit; break;
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
const CSection &item = _sections[index];
switch(propID)
{
case kpidPath: StringToProp(item.Name, prop); break;
case kpidSize: prop = (UInt64)item.VSize; break;
case kpidPackSize: prop = (UInt64)item.GetPackSize(); break;
case kpidOffset: prop = item.Pa; break;
case kpidVa: if (item.IsRealSect) prop = item.Va; break;
case kpidMTime:
case kpidCTime:
TimeToProp(item.IsDebug ? item.Time : _header.Time, prop); break;
case kpidCharacts: if (item.IsRealSect) FLAGS_TO_PROP(g_SectFlags, item.Flags, prop); break;
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
HRESULT CHandler::LoadDebugSections(IInStream *stream, bool &thereIsSection)
{
thereIsSection = false;
const CDirLink &debugLink = _optHeader.DirItems[kDirLink_Debug];
if (debugLink.Size == 0)
return S_OK;
const unsigned kEntrySize = 28;
UInt32 numItems = debugLink.Size / kEntrySize;
if (numItems * kEntrySize != debugLink.Size || numItems > 16)
return S_FALSE;
UInt64 pa = 0;
int i;
for (i = 0; i < _sections.Size(); i++)
{
const CSection &sect = _sections[i];
if (sect.Va < debugLink.Va && debugLink.Va + debugLink.Size <= sect.Va + sect.PSize)
{
pa = sect.Pa + (debugLink.Va - sect.Va);
break;
}
}
if (i == _sections.Size())
{
return S_OK;
// Exe for ARM requires S_OK
// return S_FALSE;
}
CByteBuffer buffer;
buffer.SetCapacity(debugLink.Size);
Byte *buf = buffer;
RINOK(stream->Seek(pa, STREAM_SEEK_SET, NULL));
RINOK(ReadStream_FALSE(stream, buf, debugLink.Size));
for (i = 0; i < (int)numItems; i++)
{
CDebugEntry de;
de.Parse(buf);
if (de.Size == 0)
continue;
CSection sect;
sect.Name = ".debug" + GetDecString(i);
sect.IsDebug = true;
sect.Time = de.Time;
sect.Va = de.Va;
sect.Pa = de.Pa;
sect.PSize = sect.VSize = de.Size;
UInt32 totalSize = sect.Pa + sect.PSize;
if (totalSize > _totalSize)
{
_totalSize = totalSize;
_sections.Add(sect);
thereIsSection = true;
}
buf += kEntrySize;
}
return S_OK;
}
HRESULT CHandler::Open2(IInStream *stream)
{
const UInt32 kBufSize = 1 << 18;
const UInt32 kSigSize = 2;
CByteBuffer buffer;
buffer.SetCapacity(kBufSize);
Byte *buf = buffer;
size_t processed = kSigSize;
RINOK(ReadStream_FALSE(stream, buf, processed));
if (buf[0] != 'M' || buf[1] != 'Z')
return S_FALSE;
processed = kBufSize - kSigSize;
RINOK(ReadStream(stream, buf + kSigSize, &processed));
processed += kSigSize;
if (!Parse(buf, (UInt32)processed))
return S_FALSE;
bool thereISDebug;
RINOK(LoadDebugSections(stream, thereISDebug));
const CDirLink &certLink = _optHeader.DirItems[kDirLink_Certificate];
if (certLink.Size != 0)
{
CSection sect;
sect.Name = "CERTIFICATE";
sect.Va = 0;
sect.Pa = certLink.Va;
sect.PSize = sect.VSize = certLink.Size;
sect.UpdateTotalSize(_totalSize);
_sections.Add(sect);
}
if (thereISDebug)
{
const UInt32 kAlign = 1 << 12;
UInt32 alignPos = _totalSize & (kAlign - 1);
if (alignPos != 0)
{
UInt32 size = kAlign - alignPos;
RINOK(stream->Seek(_totalSize, STREAM_SEEK_SET, NULL));
buffer.Free();
buffer.SetCapacity(kAlign);
Byte *buf = buffer;
size_t processed = size;
RINOK(ReadStream(stream, buf, &processed));
size_t i;
for (i = 0; i < processed; i++)
{
if (buf[i] != 0)
break;
}
if (processed < size && processed < 100)
_totalSize += (UInt32)processed;
else if (((_totalSize + i) & 0x1FF) == 0 || processed < size)
_totalSize += (UInt32)i;
}
}
if (_header.NumSymbols > 0 && _header.PointerToSymbolTable >= 512)
{
if (_header.NumSymbols >= (1 << 24))
return S_FALSE;
CSection sect;
sect.Name = "COFF_SYMBOLS";
UInt32 size = _header.NumSymbols * 18;
RINOK(stream->Seek((UInt64)_header.PointerToSymbolTable + size, STREAM_SEEK_SET, NULL));
Byte buf[4];
RINOK(ReadStream_FALSE(stream, buf, 4));
UInt32 size2 = Get32(buf);
if (size2 >= (1 << 28))
return S_FALSE;
size += size2;
sect.Va = 0;
sect.Pa = _header.PointerToSymbolTable;
sect.PSize = sect.VSize = size;
sect.UpdateTotalSize(_totalSize);
_sections.Add(sect);
}
UInt64 fileSize;
RINOK(stream->Seek(0, STREAM_SEEK_END, &fileSize));
if (fileSize > _totalSize)
return S_FALSE;
_totalSizeLimited = (_totalSize < fileSize) ? _totalSize : (UInt32)fileSize;
{
CObjectVector<CSection> sections = _sections;
sections.Sort();
UInt32 limit = (1 << 12);
int num = 0;
for (int i = 0; i < sections.Size(); i++)
{
const CSection &s = sections[i];
if (s.Pa > limit)
{
CSection s2;
s2.Pa = s2.Va = limit;
s2.PSize = s2.VSize = s.Pa - limit;
char sz[32];
ConvertUInt64ToString(++num, sz);
s2.Name = "[data-";
s2.Name += sz;
s2.Name += "]";
_sections.Add(s2);
}
UInt32 next = s.Pa + s.PSize;
if (next < limit)
break;
limit = next;
}
}
return S_OK;
}
HRESULT CalcCheckSum(ISequentialInStream *stream, UInt32 size, UInt32 excludePos, UInt32 &res)
{
// size &= ~1;
const UInt32 kBufSize = 1 << 23;
CByteBuffer buffer;
buffer.SetCapacity(kBufSize);
Byte *buf = buffer;
UInt32 sum = 0;
UInt32 pos;
for(pos = 0;;)
{
UInt32 rem = size - pos;
if (rem > kBufSize)
rem = kBufSize;
if (rem == 0)
break;
size_t processed = rem;
RINOK(ReadStream(stream, buf, &processed));
/*
for (; processed < rem; processed++)
buf[processed] = 0;
*/
if ((processed & 1) != 0)
buf[processed] = 0;
for (int j = 0; j < 4; j++)
{
UInt32 p = excludePos + j;
if (pos <= p && p < pos + processed)
buf[p - pos] = 0;
}
for (size_t i = 0; i < processed; i += 2)
{
sum += Get16(buf + i);
sum = (sum + (sum >> 16)) & 0xFFFF;
}
pos += (UInt32)processed;
if (rem != processed)
break;
}
sum += pos;
res = sum;
return S_OK;
}
STDMETHODIMP CHandler::Open(IInStream *inStream,
const UInt64 * /* maxCheckStartPosition */,
IArchiveOpenCallback * /* openArchiveCallback */)
{
COM_TRY_BEGIN
Close();
RINOK(Open2(inStream));
_inStream = inStream;
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
_inStream.Release();
_sections.Clear();
return S_OK;
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = _sections.Size();
return S_OK;
}
STDMETHODIMP CHandler::Extract(const UInt32* indices, UInt32 numItems,
Int32 _aTestMode, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool testMode = (_aTestMode != 0);
bool allFilesMode = (numItems == UInt32(-1));
if (allFilesMode)
numItems = _sections.Size();
if (numItems == 0)
return S_OK;
UInt64 totalSize = 0;
UInt32 i;
for (i = 0; i < numItems; i++)
totalSize += _sections[allFilesMode ? i : indices[i]].GetPackSize();
extractCallback->SetTotal(totalSize);
UInt64 currentTotalSize = 0;
UInt64 currentItemSize;
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
CLocalProgress *lps = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = lps;
lps->Init(extractCallback, false);
bool checkSumOK = true;
if (_optHeader.CheckSum != 0 && (int)numItems == _sections.Size())
{
UInt32 checkSum = 0;
RINOK(_inStream->Seek(0, STREAM_SEEK_SET, NULL));
CalcCheckSum(_inStream, _totalSizeLimited, _peOffset + kHeaderSize + 64, checkSum);
checkSumOK = (checkSum == _optHeader.CheckSum);
}
CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
CMyComPtr<ISequentialInStream> inStream(streamSpec);
streamSpec->SetStream(_inStream);
for (i = 0; i < numItems; i++, currentTotalSize += currentItemSize)
{
lps->InSize = lps->OutSize = currentTotalSize;
RINOK(lps->SetCur());
Int32 askMode = testMode ?
NArchive::NExtract::NAskMode::kTest :
NArchive::NExtract::NAskMode::kExtract;
UInt32 index = allFilesMode ? i : indices[i];
const CSection &item = _sections[index];
currentItemSize = item.GetPackSize();
CMyComPtr<ISequentialOutStream> outStream;
RINOK(extractCallback->GetStream(index, &outStream, askMode));
if (!testMode && !outStream)
continue;
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(_inStream->Seek(item.Pa, STREAM_SEEK_SET, NULL));
streamSpec->Init(currentItemSize);
RINOK(copyCoder->Code(inStream, outStream, NULL, NULL, progress));
outStream.Release();
RINOK(extractCallback->SetOperationResult((copyCoderSpec->TotalSize == currentItemSize) ?
checkSumOK ?
NArchive::NExtract::NOperationResult::kOK:
NArchive::NExtract::NOperationResult::kCRCError:
NArchive::NExtract::NOperationResult::kDataError));
}
return S_OK;
COM_TRY_END
}
static IInArchive *CreateArc() { return new CHandler; }
static CArcInfo g_ArcInfo =
{ L"PE", L"", 0, 0xDD, { 0 }, 0, false, CreateArc, 0 };
REGISTER_ARC(Pe)
}}
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