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p7zip/CPP/7zip/Archive/Wim/WimIn.cpp
Mario Fetka 855c3e81dd Imported Upstream version 16.02+dfsg
2017-10-11 12:35:36 +02:00

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// Archive/WimIn.cpp
#include "StdAfx.h"
// #define SHOW_DEBUG_INFO
#ifdef SHOW_DEBUG_INFO
#include <stdio.h>
#define PRF(x) x
#else
#define PRF(x)
#endif
#include "../../../../C/CpuArch.h"
#include "../../../Common/IntToString.h"
#include "../../../Common/StringToInt.h"
#include "../../../Common/UTFConvert.h"
#include "../../Common/LimitedStreams.h"
#include "../../Common/StreamObjects.h"
#include "../../Common/StreamUtils.h"
#include "../../Compress/XpressDecoder.h"
#include "../Common/OutStreamWithSha1.h"
#include "WimIn.h"
#define Get16(p) GetUi16(p)
#define Get32(p) GetUi32(p)
#define Get64(p) GetUi64(p)
namespace NArchive {
namespace NWim {
static int inline GetLog(UInt32 num)
{
for (int i = 0; i < 32; i++)
if (((UInt32)1 << i) == num)
return i;
return -1;
}
CUnpacker::~CUnpacker()
{
if (lzmsDecoder)
delete lzmsDecoder;
}
HRESULT CUnpacker::UnpackChunk(
ISequentialInStream *inStream,
unsigned method, unsigned chunkSizeBits,
size_t inSize, size_t outSize,
ISequentialOutStream *outStream)
{
if (inSize == outSize)
{
}
else if (method == NMethod::kXPRESS)
{
}
else if (method == NMethod::kLZX)
{
if (!lzxDecoder)
{
lzxDecoderSpec = new NCompress::NLzx::CDecoder(true);
lzxDecoder = lzxDecoderSpec;
}
}
else if (method == NMethod::kLZMS)
{
if (!lzmsDecoder)
lzmsDecoder = new NCompress::NLzms::CDecoder();
}
else
return E_NOTIMPL;
const size_t chunkSize = (size_t)1 << chunkSizeBits;
unpackBuf.EnsureCapacity(chunkSize);
if (!unpackBuf.Data)
return E_OUTOFMEMORY;
HRESULT res = S_FALSE;
size_t unpackedSize = 0;
if (inSize == outSize)
{
unpackedSize = outSize;
res = ReadStream(inStream, unpackBuf.Data, &unpackedSize);
TotalPacked += unpackedSize;
}
else if (inSize < chunkSize)
{
packBuf.EnsureCapacity(chunkSize);
if (!packBuf.Data)
return E_OUTOFMEMORY;
RINOK(ReadStream_FALSE(inStream, packBuf.Data, inSize));
TotalPacked += inSize;
if (method == NMethod::kXPRESS)
{
res = NCompress::NXpress::Decode(packBuf.Data, inSize, unpackBuf.Data, outSize);
if (res == S_OK)
unpackedSize = outSize;
}
else if (method == NMethod::kLZX)
{
lzxDecoderSpec->SetExternalWindow(unpackBuf.Data, chunkSizeBits);
lzxDecoderSpec->KeepHistoryForNext = false;
lzxDecoderSpec->SetKeepHistory(false);
res = lzxDecoderSpec->Code(packBuf.Data, inSize, (UInt32)outSize);
unpackedSize = lzxDecoderSpec->GetUnpackSize();
if (res == S_OK && !lzxDecoderSpec->WasBlockFinished())
res = S_FALSE;
}
else
{
res = lzmsDecoder->Code(packBuf.Data, inSize, unpackBuf.Data, outSize);
unpackedSize = lzmsDecoder->GetUnpackSize();;
}
}
if (unpackedSize != outSize)
{
if (res == S_OK)
res = S_FALSE;
if (unpackedSize > outSize)
res = S_FALSE;
else
memset(unpackBuf.Data + unpackedSize, 0, outSize - unpackedSize);
}
if (outStream)
{
RINOK(WriteStream(outStream, unpackBuf.Data, outSize));
}
return res;
}
HRESULT CUnpacker::Unpack2(
IInStream *inStream,
const CResource &resource,
const CHeader &header,
const CDatabase *db,
ISequentialOutStream *outStream,
ICompressProgressInfo *progress)
{
if (!resource.IsCompressed() && !resource.IsSolid())
{
if (!copyCoder)
{
copyCoderSpec = new NCompress::CCopyCoder;
copyCoder = copyCoderSpec;
}
CLimitedSequentialInStream *limitedStreamSpec = new CLimitedSequentialInStream();
CMyComPtr<ISequentialInStream> limitedStream = limitedStreamSpec;
limitedStreamSpec->SetStream(inStream);
RINOK(inStream->Seek(resource.Offset, STREAM_SEEK_SET, NULL));
if (resource.PackSize != resource.UnpackSize)
return S_FALSE;
limitedStreamSpec->Init(resource.PackSize);
TotalPacked += resource.PackSize;
HRESULT res = copyCoder->Code(limitedStream, outStream, NULL, NULL, progress);
if (res == S_OK && copyCoderSpec->TotalSize != resource.UnpackSize)
res = S_FALSE;
return res;
}
if (resource.IsSolid())
{
if (!db || resource.SolidIndex < 0)
return E_NOTIMPL;
if (resource.IsCompressed())
return E_NOTIMPL;
const CSolid &ss = db->Solids[resource.SolidIndex];
const unsigned chunkSizeBits = ss.ChunkSizeBits;
const size_t chunkSize = (size_t)1 << chunkSizeBits;
size_t chunkIndex = 0;
UInt64 rem = ss.UnpackSize;
size_t offsetInChunk = 0;
if (resource.IsSolidSmall())
{
UInt64 offs = resource.Offset;
if (offs < ss.SolidOffset)
return E_NOTIMPL;
offs -= ss.SolidOffset;
if (offs > ss.UnpackSize)
return E_NOTIMPL;
rem = resource.PackSize;
if (rem > ss.UnpackSize - offs)
return E_NOTIMPL;
chunkIndex = (size_t)(offs >> chunkSizeBits);
offsetInChunk = (size_t)offs & (chunkSize - 1);
}
UInt64 packProcessed = 0;
UInt64 outProcessed = 0;
if (_solidIndex == resource.SolidIndex && _unpackedChunkIndex == chunkIndex)
{
size_t cur = chunkSize - offsetInChunk;
if (cur > rem)
cur = (size_t)rem;
RINOK(WriteStream(outStream, unpackBuf.Data + offsetInChunk, cur));
outProcessed += cur;
rem -= cur;
offsetInChunk = 0;
chunkIndex++;
}
for (;;)
{
if (rem == 0)
return S_OK;
UInt64 offset = ss.Chunks[chunkIndex];
UInt64 packSize = ss.GetChunkPackSize(chunkIndex);
const CResource &rs = db->DataStreams[ss.StreamIndex].Resource;
RINOK(inStream->Seek(rs.Offset + ss.HeadersSize + offset, STREAM_SEEK_SET, NULL));
size_t cur = chunkSize;
UInt64 unpackRem = ss.UnpackSize - ((UInt64)chunkIndex << chunkSizeBits);
if (cur > unpackRem)
cur = (size_t)unpackRem;
_solidIndex = -1;
_unpackedChunkIndex = 0;
HRESULT res = UnpackChunk(inStream, ss.Method, chunkSizeBits, (size_t)packSize, cur, NULL);
if (res != S_OK)
{
// We ignore data errors in solid stream. SHA will show what files are bad.
if (res != S_FALSE)
return res;
}
_solidIndex = resource.SolidIndex;
_unpackedChunkIndex = chunkIndex;
if (cur < offsetInChunk)
return E_FAIL;
cur -= offsetInChunk;
if (cur > rem)
cur = (size_t)rem;
RINOK(WriteStream(outStream, unpackBuf.Data + offsetInChunk, cur));
if (progress)
{
RINOK(progress->SetRatioInfo(&packProcessed, &outProcessed));
packProcessed += packSize;
outProcessed += cur;
}
rem -= cur;
offsetInChunk = 0;
chunkIndex++;
}
}
// ---------- NON Solid ----------
const UInt64 unpackSize = resource.UnpackSize;
if (unpackSize == 0)
{
if (resource.PackSize == 0)
return S_OK;
return S_FALSE;
}
if (unpackSize > ((UInt64)1 << 63))
return E_NOTIMPL;
const unsigned chunkSizeBits = header.ChunkSizeBits;
const unsigned entrySizeShifts = (resource.UnpackSize < ((UInt64)1 << 32) ? 2 : 3);
UInt64 baseOffset = resource.Offset;
UInt64 packDataSize;
size_t numChunks;
{
UInt64 numChunks64 = (unpackSize + (((UInt32)1 << chunkSizeBits) - 1)) >> chunkSizeBits;
UInt64 sizesBufSize64 = (numChunks64 - 1) << entrySizeShifts;
if (sizesBufSize64 > resource.PackSize)
return S_FALSE;
packDataSize = resource.PackSize - sizesBufSize64;
size_t sizesBufSize = (size_t)sizesBufSize64;
if (sizesBufSize != sizesBufSize64)
return E_OUTOFMEMORY;
sizesBuf.AllocAtLeast(sizesBufSize);
RINOK(inStream->Seek(baseOffset, STREAM_SEEK_SET, NULL));
RINOK(ReadStream_FALSE(inStream, sizesBuf, sizesBufSize));
baseOffset += sizesBufSize64;
numChunks = (size_t)numChunks64;
}
_solidIndex = -1;
_unpackedChunkIndex = 0;
UInt64 outProcessed = 0;
UInt64 offset = 0;
for (size_t i = 0; i < numChunks; i++)
{
UInt64 nextOffset = packDataSize;
if (i + 1 < numChunks)
{
const Byte *p = (const Byte *)sizesBuf + (i << entrySizeShifts);
nextOffset = (entrySizeShifts == 2) ? Get32(p): Get64(p);
}
if (nextOffset < offset)
return S_FALSE;
UInt64 inSize64 = nextOffset - offset;
size_t inSize = (size_t)inSize64;
if (inSize != inSize64)
return S_FALSE;
RINOK(inStream->Seek(baseOffset + offset, STREAM_SEEK_SET, NULL));
if (progress)
{
RINOK(progress->SetRatioInfo(&offset, &outProcessed));
}
size_t outSize = (size_t)1 << chunkSizeBits;
const UInt64 rem = unpackSize - outProcessed;
if (outSize > rem)
outSize = (size_t)rem;
RINOK(UnpackChunk(inStream, header.GetMethod(), chunkSizeBits, inSize, outSize, outStream));
outProcessed += outSize;
offset = nextOffset;
}
return S_OK;
}
HRESULT CUnpacker::Unpack(IInStream *inStream, const CResource &resource, const CHeader &header, const CDatabase *db,
ISequentialOutStream *outStream, ICompressProgressInfo *progress, Byte *digest)
{
COutStreamWithSha1 *shaStreamSpec = NULL;
CMyComPtr<ISequentialOutStream> shaStream;
// outStream can be NULL, so we use COutStreamWithSha1 even if sha1 is not required
// if (digest)
{
shaStreamSpec = new COutStreamWithSha1();
shaStream = shaStreamSpec;
shaStreamSpec->SetStream(outStream);
shaStreamSpec->Init(digest != NULL);
outStream = shaStream;
}
HRESULT res = Unpack2(inStream, resource, header, db, outStream, progress);
if (digest)
shaStreamSpec->Final(digest);
return res;
}
HRESULT CUnpacker::UnpackData(IInStream *inStream,
const CResource &resource, const CHeader &header,
const CDatabase *db,
CByteBuffer &buf, Byte *digest)
{
// if (resource.IsSolid()) return E_NOTIMPL;
UInt64 unpackSize64 = resource.UnpackSize;
if (db)
unpackSize64 = db->Get_UnpackSize_of_Resource(resource);
size_t size = (size_t)unpackSize64;
if (size != unpackSize64)
return E_OUTOFMEMORY;
buf.Alloc(size);
CBufPtrSeqOutStream *outStreamSpec = new CBufPtrSeqOutStream();
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
outStreamSpec->Init((Byte *)buf, size);
return Unpack(inStream, resource, header, db, outStream, NULL, digest);
}
void CResource::Parse(const Byte *p)
{
Flags = p[7];
PackSize = Get64(p) & (((UInt64)1 << 56) - 1);
Offset = Get64(p + 8);
UnpackSize = Get64(p + 16);
KeepSolid = false;
SolidIndex = -1;
}
#define GET_RESOURCE(_p_, res) res.ParseAndUpdatePhySize(_p_, phySize)
static inline void ParseStream(bool oldVersion, const Byte *p, CStreamInfo &s)
{
s.Resource.Parse(p);
if (oldVersion)
{
s.PartNumber = 1;
s.Id = Get32(p + 24);
p += 28;
}
else
{
s.PartNumber = Get16(p + 24);
p += 26;
}
s.RefCount = Get32(p);
memcpy(s.Hash, p + 4, kHashSize);
}
static const char *kLongPath = "[LongPath]";
void CDatabase::GetShortName(unsigned index, NWindows::NCOM::CPropVariant &name) const
{
const CItem &item = Items[index];
const CImage &image = Images[item.ImageIndex];
if (item.Parent < 0 && image.NumEmptyRootItems != 0)
{
name.Clear();
return;
}
const Byte *meta = image.Meta + item.Offset +
(IsOldVersion ? kDirRecordSizeOld : kDirRecordSize);
UInt32 fileNameLen = Get16(meta - 2);
UInt32 shortLen = Get16(meta - 4) / 2;
wchar_t *s = name.AllocBstr(shortLen);
if (fileNameLen != 0)
meta += fileNameLen + 2;
for (UInt32 i = 0; i < shortLen; i++)
s[i] = Get16(meta + i * 2);
s[shortLen] = 0;
// empty shortName has no ZERO at the end ?
}
void CDatabase::GetItemName(unsigned index, NWindows::NCOM::CPropVariant &name) const
{
const CItem &item = Items[index];
const CImage &image = Images[item.ImageIndex];
if (item.Parent < 0 && image.NumEmptyRootItems != 0)
{
name = image.RootName;
return;
}
const Byte *meta = image.Meta + item.Offset +
(item.IsAltStream ?
(IsOldVersion ? 0x10 : 0x24) :
(IsOldVersion ? kDirRecordSizeOld - 2 : kDirRecordSize - 2));
UInt32 len = Get16(meta) / 2;
wchar_t *s = name.AllocBstr(len);
meta += 2;
len++;
for (UInt32 i = 0; i < len; i++)
s[i] = Get16(meta + i * 2);
}
void CDatabase::GetItemPath(unsigned index1, bool showImageNumber, NWindows::NCOM::CPropVariant &path) const
{
unsigned size = 0;
int index = index1;
int imageIndex = Items[index].ImageIndex;
const CImage &image = Images[imageIndex];
unsigned newLevel = 0;
bool needColon = false;
for (;;)
{
const CItem &item = Items[index];
index = item.Parent;
if (index >= 0 || image.NumEmptyRootItems == 0)
{
const Byte *meta = image.Meta + item.Offset;
meta += item.IsAltStream ?
(IsOldVersion ? 0x10 : 0x24) :
(IsOldVersion ? kDirRecordSizeOld - 2 : kDirRecordSize - 2);
needColon = item.IsAltStream;
size += Get16(meta) / 2;
size += newLevel;
newLevel = 1;
if (size >= ((UInt32)1 << 15))
{
path = kLongPath;
return;
}
}
if (index < 0)
break;
}
if (showImageNumber)
{
size += image.RootName.Len();
size += newLevel;
}
else if (needColon)
size++;
wchar_t *s = path.AllocBstr(size);
s[size] = 0;
if (showImageNumber)
{
MyStringCopy(s, (const wchar_t *)image.RootName);
if (newLevel)
s[image.RootName.Len()] = (wchar_t)(needColon ? L':' : WCHAR_PATH_SEPARATOR);
}
else if (needColon)
s[0] = L':';
index = index1;
wchar_t separator = 0;
for (;;)
{
const CItem &item = Items[index];
index = item.Parent;
if (index >= 0 || image.NumEmptyRootItems == 0)
{
if (separator != 0)
s[--size] = separator;
const Byte *meta = image.Meta + item.Offset;
meta += (item.IsAltStream) ?
(IsOldVersion ? 0x10: 0x24) :
(IsOldVersion ? kDirRecordSizeOld - 2 : kDirRecordSize - 2);
unsigned len = Get16(meta) / 2;
size -= len;
wchar_t *dest = s + size;
meta += 2;
for (unsigned i = 0; i < len; i++)
dest[i] = Get16(meta + i * 2);
}
if (index < 0)
return;
separator = item.IsAltStream ? L':' : WCHAR_PATH_SEPARATOR;
}
}
// if (ver <= 1.10), root folder contains real items.
// if (ver >= 1.12), root folder contains only one folder with empty name.
HRESULT CDatabase::ParseDirItem(size_t pos, int parent)
{
const unsigned align = GetDirAlignMask();
if ((pos & align) != 0)
return S_FALSE;
for (unsigned numItems = 0;; numItems++)
{
if (OpenCallback && (Items.Size() & 0xFFFF) == 0)
{
UInt64 numFiles = Items.Size();
RINOK(OpenCallback->SetCompleted(&numFiles, NULL));
}
const size_t rem = DirSize - pos;
if (pos < DirStartOffset || pos > DirSize || rem < 8)
return S_FALSE;
const Byte *p = DirData + pos;
UInt64 len = Get64(p);
if (len == 0)
{
DirProcessed += 8;
return S_OK;
}
if ((len & align) != 0 || rem < len)
return S_FALSE;
DirProcessed += (size_t)len;
if (DirProcessed > DirSize)
return S_FALSE;
const unsigned dirRecordSize = IsOldVersion ? kDirRecordSizeOld : kDirRecordSize;
if (len < dirRecordSize)
return S_FALSE;
CItem item;
UInt32 attrib = Get32(p + 8);
item.IsDir = ((attrib & 0x10) != 0);
UInt64 subdirOffset = Get64(p + 0x10);
const UInt32 numAltStreams = Get16(p + dirRecordSize - 6);
const UInt32 shortNameLen = Get16(p + dirRecordSize - 4);
const UInt32 fileNameLen = Get16(p + dirRecordSize - 2);
if ((shortNameLen & 1) != 0 || (fileNameLen & 1) != 0)
return S_FALSE;
const UInt32 shortNameLen2 = (shortNameLen == 0 ? shortNameLen : shortNameLen + 2);
const UInt32 fileNameLen2 = (fileNameLen == 0 ? fileNameLen : fileNameLen + 2);
if (((dirRecordSize + fileNameLen2 + shortNameLen2 + align) & ~align) > len)
return S_FALSE;
p += dirRecordSize;
{
if (*(const UInt16 *)(p + fileNameLen) != 0)
return S_FALSE;
for (UInt32 j = 0; j < fileNameLen; j += 2)
if (*(const UInt16 *)(p + j) == 0)
return S_FALSE;
}
// PRF(printf("\n%S", p));
if (shortNameLen != 0)
{
// empty shortName has no ZERO at the end ?
const Byte *p2 = p + fileNameLen2;
if (*(const UInt16 *)(p2 + shortNameLen) != 0)
return S_FALSE;
for (UInt32 j = 0; j < shortNameLen; j += 2)
if (*(const UInt16 *)(p2 + j) == 0)
return S_FALSE;
}
item.Offset = pos;
item.Parent = parent;
item.ImageIndex = Images.Size() - 1;
const unsigned prevIndex = Items.Add(item);
pos += (size_t)len;
for (UInt32 i = 0; i < numAltStreams; i++)
{
const size_t rem2 = DirSize - pos;
if (pos < DirStartOffset || pos > DirSize || rem2 < 8)
return S_FALSE;
const Byte *p2 = DirData + pos;
const UInt64 len2 = Get64(p2);
if ((len2 & align) != 0 || rem2 < len2 || len2 < (IsOldVersion ? 0x18 : 0x28))
return S_FALSE;
DirProcessed += (size_t)len2;
if (DirProcessed > DirSize)
return S_FALSE;
unsigned extraOffset = 0;
if (IsOldVersion)
extraOffset = 0x10;
else
{
if (Get64(p2 + 8) != 0)
return S_FALSE;
extraOffset = 0x24;
}
const UInt32 fileNameLen111 = Get16(p2 + extraOffset);
if ((fileNameLen111 & 1) != 0)
return S_FALSE;
/* Probably different versions of ImageX can use different number of
additional ZEROs. So we don't use exact check. */
const UInt32 fileNameLen222 = (fileNameLen111 == 0 ? fileNameLen111 : fileNameLen111 + 2);
if (((extraOffset + 2 + fileNameLen222 + align) & ~align) > len2)
return S_FALSE;
{
const Byte *p3 = p2 + extraOffset + 2;
if (*(const UInt16 *)(p3 + fileNameLen111) != 0)
return S_FALSE;
for (UInt32 j = 0; j < fileNameLen111; j += 2)
if (*(const UInt16 *)(p3 + j) == 0)
return S_FALSE;
// PRF(printf("\n %S", p3));
}
/* wim uses alt sreams list, if there is at least one alt stream.
And alt stream without name is main stream. */
// Why wimlib writes two alt streams for REPARSE_POINT, with empty second alt stream?
Byte *prevMeta = DirData + item.Offset;
if (fileNameLen111 == 0 &&
((attrib & FILE_ATTRIBUTE_REPARSE_POINT) || !item.IsDir)
&& (IsOldVersion || IsEmptySha(prevMeta + 0x40)))
{
if (IsOldVersion)
memcpy(prevMeta + 0x10, p2 + 8, 4); // It's 32-bit Id
else if (!IsEmptySha(p2 + 0x10))
{
// if (IsEmptySha(prevMeta + 0x40))
memcpy(prevMeta + 0x40, p2 + 0x10, kHashSize);
// else HeadersError = true;
}
}
else
{
ThereAreAltStreams = true;
CItem item2;
item2.Offset = pos;
item2.IsAltStream = true;
item2.Parent = prevIndex;
item2.ImageIndex = Images.Size() - 1;
Items.Add(item2);
}
pos += (size_t)len2;
}
if (parent < 0 && numItems == 0 && shortNameLen == 0 && fileNameLen == 0 && item.IsDir)
{
const Byte *p2 = DirData + pos;
if (DirSize - pos >= 8 && Get64(p2) == 0)
{
CImage &image = Images.Back();
image.NumEmptyRootItems = 1;
if (subdirOffset != 0
&& DirSize - pos >= 16
&& Get64(p2 + 8) != 0
&& pos + 8 < subdirOffset)
{
// Longhorn.4093 contains hidden files after empty root folder and before items of next folder. Why?
// That code shows them. If we want to ignore them, we need to update DirProcessed.
// DirProcessed += (size_t)(subdirOffset - (pos + 8));
// printf("\ndirOffset = %5d hiddenOffset = %5d\n", (int)subdirOffset, (int)pos + 8);
subdirOffset = pos + 8;
// return S_FALSE;
}
}
}
if (item.IsDir && subdirOffset != 0)
{
RINOK(ParseDirItem((size_t)subdirOffset, prevIndex));
}
}
}
HRESULT CDatabase::ParseImageDirs(CByteBuffer &buf, int parent)
{
DirData = buf;
DirSize = buf.Size();
if (DirSize < 8)
return S_FALSE;
const Byte *p = DirData;
size_t pos = 0;
CImage &image = Images.Back();
if (IsOldVersion)
{
UInt32 numEntries = Get32(p + 4);
if (numEntries > (1 << 28) ||
numEntries > (DirSize >> 3))
return S_FALSE;
UInt32 sum = 8;
if (numEntries != 0)
sum = numEntries * 8;
image.SecurOffsets.ClearAndReserve(numEntries + 1);
image.SecurOffsets.AddInReserved(sum);
for (UInt32 i = 0; i < numEntries; i++)
{
const Byte *pp = p + (size_t)i * 8;
UInt32 len = Get32(pp);
if (i != 0 && Get32(pp + 4) != 0)
return S_FALSE;
if (len > DirSize - sum)
return S_FALSE;
sum += len;
if (sum < len)
return S_FALSE;
image.SecurOffsets.AddInReserved(sum);
}
pos = sum;
const size_t align = GetDirAlignMask();
pos = (pos + align) & ~(size_t)align;
}
else
{
UInt32 totalLen = Get32(p);
if (totalLen == 0)
pos = 8;
else
{
if (totalLen < 8)
return S_FALSE;
UInt32 numEntries = Get32(p + 4);
pos = 8;
if (totalLen > DirSize || numEntries > ((totalLen - 8) >> 3))
return S_FALSE;
UInt32 sum = (UInt32)pos + numEntries * 8;
image.SecurOffsets.ClearAndReserve(numEntries + 1);
image.SecurOffsets.AddInReserved(sum);
for (UInt32 i = 0; i < numEntries; i++, pos += 8)
{
UInt64 len = Get64(p + pos);
if (len > totalLen - sum)
return S_FALSE;
sum += (UInt32)len;
image.SecurOffsets.AddInReserved(sum);
}
pos = sum;
pos = (pos + 7) & ~(size_t)7;
if (pos != (((size_t)totalLen + 7) & ~(size_t)7))
return S_FALSE;
}
}
if (pos > DirSize)
return S_FALSE;
DirStartOffset = DirProcessed = pos;
image.StartItem = Items.Size();
RINOK(ParseDirItem(pos, parent));
image.NumItems = Items.Size() - image.StartItem;
if (DirProcessed == DirSize)
return S_OK;
/* Original program writes additional 8 bytes (END_OF_ROOT_FOLDER),
but the reference to that folder is empty */
// we can't use DirProcessed - DirStartOffset == 112 check if there is alt stream in root
if (DirProcessed == DirSize - 8 && Get64(p + DirSize - 8) != 0)
return S_OK;
return S_FALSE;
}
HRESULT CHeader::Parse(const Byte *p, UInt64 &phySize)
{
UInt32 headerSize = Get32(p + 8);
phySize = headerSize;
Version = Get32(p + 0x0C);
Flags = Get32(p + 0x10);
if (!IsSupported())
return S_FALSE;
{
ChunkSize = Get32(p + 0x14);
ChunkSizeBits = kChunkSizeBits;
if (ChunkSize != 0)
{
int log = GetLog(ChunkSize);
if (log < 12)
return S_FALSE;
ChunkSizeBits = log;
}
}
_IsOldVersion = false;
_IsNewVersion = false;
if (IsSolidVersion())
_IsNewVersion = true;
else
{
if (Version < 0x010900)
return S_FALSE;
_IsOldVersion = (Version <= 0x010A00);
// We don't know details about 1.11 version. So we use headerSize to guess exact features.
if (Version == 0x010B00 && headerSize == 0x60)
_IsOldVersion = true;
_IsNewVersion = (Version >= 0x010D00);
}
unsigned offset;
if (IsOldVersion())
{
if (headerSize != 0x60)
return S_FALSE;
memset(Guid, 0, 16);
offset = 0x18;
PartNumber = 1;
NumParts = 1;
}
else
{
if (headerSize < 0x74)
return S_FALSE;
memcpy(Guid, p + 0x18, 16);
PartNumber = Get16(p + 0x28);
NumParts = Get16(p + 0x2A);
if (PartNumber == 0 || PartNumber > NumParts)
return S_FALSE;
offset = 0x2C;
if (IsNewVersion())
{
// if (headerSize < 0xD0)
if (headerSize != 0xD0)
return S_FALSE;
NumImages = Get32(p + offset);
offset += 4;
}
}
GET_RESOURCE(p + offset , OffsetResource);
GET_RESOURCE(p + offset + 0x18, XmlResource);
GET_RESOURCE(p + offset + 0x30, MetadataResource);
BootIndex = 0;
if (IsNewVersion())
{
BootIndex = Get32(p + offset + 0x48);
GET_RESOURCE(p + offset + 0x4C, IntegrityResource);
}
return S_OK;
}
const Byte kSignature[kSignatureSize] = { 'M', 'S', 'W', 'I', 'M', 0, 0, 0 };
HRESULT ReadHeader(IInStream *inStream, CHeader &h, UInt64 &phySize)
{
Byte p[kHeaderSizeMax];
RINOK(ReadStream_FALSE(inStream, p, kHeaderSizeMax));
if (memcmp(p, kSignature, kSignatureSize) != 0)
return S_FALSE;
return h.Parse(p, phySize);
}
static HRESULT ReadStreams(IInStream *inStream, const CHeader &h, CDatabase &db)
{
CByteBuffer offsetBuf;
CUnpacker unpacker;
RINOK(unpacker.UnpackData(inStream, h.OffsetResource, h, NULL, offsetBuf, NULL));
const size_t streamInfoSize = h.IsOldVersion() ? kStreamInfoSize + 2 : kStreamInfoSize;
{
const unsigned numItems = (unsigned)(offsetBuf.Size() / streamInfoSize);
if ((size_t)numItems * streamInfoSize != offsetBuf.Size())
return S_FALSE;
const unsigned numItems2 = db.DataStreams.Size() + numItems;
if (numItems2 < numItems)
return S_FALSE;
db.DataStreams.Reserve(numItems2);
}
bool keepSolid = false;
for (size_t i = 0; i < offsetBuf.Size(); i += streamInfoSize)
{
CStreamInfo s;
ParseStream(h.IsOldVersion(), (const Byte *)offsetBuf + i, s);
PRF(printf("\n"));
PRF(printf(s.Resource.IsMetadata() ? "### META" : " DATA"));
PRF(printf(" %2X", s.Resource.Flags));
PRF(printf(" %9I64X", s.Resource.Offset));
PRF(printf(" %9I64X", s.Resource.PackSize));
PRF(printf(" %9I64X", s.Resource.UnpackSize));
PRF(printf(" %d", s.RefCount));
if (s.PartNumber != h.PartNumber)
continue;
if (s.Resource.IsSolid())
{
s.Resource.KeepSolid = keepSolid;
keepSolid = true;
}
else
{
s.Resource.KeepSolid = false;
keepSolid = false;
}
if (!s.Resource.IsMetadata())
db.DataStreams.AddInReserved(s);
else
{
if (s.Resource.IsSolid())
return E_NOTIMPL;
if (s.RefCount == 0)
{
// some wims have such (deleted?) metadata stream.
// examples: boot.wim in VistaBeta2, WinPE.wim from WAIK.
// db.DataStreams.Add(s);
// we can show these delete images, if we comment "continue" command;
continue;
}
if (s.RefCount > 1)
{
return S_FALSE;
// s.RefCount--;
// db.DataStreams.Add(s);
}
db.MetaStreams.Add(s);
}
}
PRF(printf("\n"));
return S_OK;
}
HRESULT CDatabase::OpenXml(IInStream *inStream, const CHeader &h, CByteBuffer &xml)
{
CUnpacker unpacker;
return unpacker.UnpackData(inStream, h.XmlResource, h, this, xml, NULL);
}
static void SetRootNames(CImage &image, unsigned value)
{
wchar_t temp[16];
ConvertUInt32ToString(value, temp);
image.RootName = temp;
image.RootNameBuf.Alloc(image.RootName.Len() * 2 + 2);
Byte *p = image.RootNameBuf;
unsigned len = image.RootName.Len() + 1;
for (unsigned k = 0; k < len; k++)
{
p[k * 2] = (Byte)temp[k];
p[k * 2 + 1] = 0;
}
}
HRESULT CDatabase::Open(IInStream *inStream, const CHeader &h, unsigned numItemsReserve, IArchiveOpenCallback *openCallback)
{
OpenCallback = openCallback;
IsOldVersion = h.IsOldVersion();
IsOldVersion9 = (h.Version == 0x10900);
RINOK(ReadStreams(inStream, h, *this));
bool needBootMetadata = !h.MetadataResource.IsEmpty();
unsigned numNonDeletedImages = 0;
CUnpacker unpacker;
FOR_VECTOR (i, MetaStreams)
{
const CStreamInfo &si = MetaStreams[i];
if (h.PartNumber != 1 || si.PartNumber != h.PartNumber)
continue;
const int userImage = Images.Size() + GetStartImageIndex();
CImage &image = Images.AddNew();
SetRootNames(image, userImage);
CByteBuffer &metadata = image.Meta;
Byte hash[kHashSize];
RINOK(unpacker.UnpackData(inStream, si.Resource, h, this, metadata, hash));
if (memcmp(hash, si.Hash, kHashSize) != 0 &&
!(h.IsOldVersion() && IsEmptySha(si.Hash)))
return S_FALSE;
image.NumEmptyRootItems = 0;
if (Items.IsEmpty())
Items.ClearAndReserve(numItemsReserve);
RINOK(ParseImageDirs(metadata, -1));
if (needBootMetadata)
{
bool sameRes = (h.MetadataResource.Offset == si.Resource.Offset);
if (sameRes)
needBootMetadata = false;
if (h.IsNewVersion())
{
if (si.RefCount == 1)
{
numNonDeletedImages++;
bool isBootIndex = (h.BootIndex == numNonDeletedImages);
if (sameRes && !isBootIndex)
return S_FALSE;
if (isBootIndex && !sameRes)
return S_FALSE;
}
}
}
}
if (needBootMetadata)
return S_FALSE;
return S_OK;
}
bool CDatabase::ItemHasStream(const CItem &item) const
{
if (item.ImageIndex < 0)
return true;
const Byte *meta = Images[item.ImageIndex].Meta + item.Offset;
if (IsOldVersion)
{
// old wim use same field for file_id and dir_offset;
if (item.IsDir)
return false;
meta += (item.IsAltStream ? 0x8 : 0x10);
UInt32 id = GetUi32(meta);
return id != 0;
}
meta += (item.IsAltStream ? 0x10 : 0x40);
return !IsEmptySha(meta);
}
#define RINOZ(x) { int __tt = (x); if (__tt != 0) return __tt; }
static int CompareStreamsByPos(const CStreamInfo *p1, const CStreamInfo *p2, void * /* param */)
{
RINOZ(MyCompare(p1->PartNumber, p2->PartNumber));
RINOZ(MyCompare(p1->Resource.Offset, p2->Resource.Offset));
return MyCompare(p1->Resource.PackSize, p2->Resource.PackSize);
}
static int CompareIDs(const unsigned *p1, const unsigned *p2, void *param)
{
const CStreamInfo *streams = (const CStreamInfo *)param;
return MyCompare(streams[*p1].Id, streams[*p2].Id);
}
static int CompareHashRefs(const unsigned *p1, const unsigned *p2, void *param)
{
const CStreamInfo *streams = (const CStreamInfo *)param;
return memcmp(streams[*p1].Hash, streams[*p2].Hash, kHashSize);
}
static int FindId(const CStreamInfo *streams, const CUIntVector &sorted, UInt32 id)
{
unsigned left = 0, right = sorted.Size();
while (left != right)
{
unsigned mid = (left + right) / 2;
unsigned streamIndex = sorted[mid];
UInt32 id2 = streams[streamIndex].Id;
if (id == id2)
return streamIndex;
if (id < id2)
right = mid;
else
left = mid + 1;
}
return -1;
}
static int FindHash(const CStreamInfo *streams, const CUIntVector &sorted, const Byte *hash)
{
unsigned left = 0, right = sorted.Size();
while (left != right)
{
unsigned mid = (left + right) / 2;
unsigned streamIndex = sorted[mid];
const Byte *hash2 = streams[streamIndex].Hash;
unsigned i;
for (i = 0; i < kHashSize; i++)
if (hash[i] != hash2[i])
break;
if (i == kHashSize)
return streamIndex;
if (hash[i] < hash2[i])
right = mid;
else
left = mid + 1;
}
return -1;
}
static int CompareItems(const unsigned *a1, const unsigned *a2, void *param)
{
const CRecordVector<CItem> &items = ((CDatabase *)param)->Items;
const CItem &i1 = items[*a1];
const CItem &i2 = items[*a2];
if (i1.IsDir != i2.IsDir)
return i1.IsDir ? -1 : 1;
if (i1.IsAltStream != i2.IsAltStream)
return i1.IsAltStream ? 1 : -1;
RINOZ(MyCompare(i1.StreamIndex, i2.StreamIndex));
RINOZ(MyCompare(i1.ImageIndex, i2.ImageIndex));
return MyCompare(i1.Offset, i2.Offset);
}
HRESULT CDatabase::FillAndCheck(const CObjectVector<CVolume> &volumes)
{
CUIntVector sortedByHash;
sortedByHash.Reserve(DataStreams.Size());
{
CByteBuffer sizesBuf;
for (unsigned iii = 0; iii < DataStreams.Size();)
{
{
const CResource &r = DataStreams[iii].Resource;
if (!r.IsSolid())
{
sortedByHash.AddInReserved(iii++);
continue;
}
}
UInt64 solidRunOffset = 0;
unsigned k;
unsigned numSolidsStart = Solids.Size();
for (k = iii; k < DataStreams.Size(); k++)
{
CStreamInfo &si = DataStreams[k];
CResource &r = si.Resource;
if (!r.IsSolid())
break;
if (!r.KeepSolid && k != iii)
break;
if (r.Flags != NResourceFlags::kSolid)
return S_FALSE;
if (!r.IsSolidBig())
continue;
if (!si.IsEmptyHash())
return S_FALSE;
if (si.RefCount != 1)
return S_FALSE;
r.SolidIndex = Solids.Size();
CSolid &ss = Solids.AddNew();
ss.StreamIndex = k;
ss.SolidOffset = solidRunOffset;
{
const size_t kSolidHeaderSize = 8 + 4 + 4;
Byte header[kSolidHeaderSize];
if (si.PartNumber >= volumes.Size())
return S_FALSE;
const CVolume &vol = volumes[si.PartNumber];
IInStream *inStream = vol.Stream;
RINOK(inStream->Seek(r.Offset, STREAM_SEEK_SET, NULL));
RINOK(ReadStream_FALSE(inStream, (Byte *)header, kSolidHeaderSize));
ss.UnpackSize = GetUi64(header);
if (ss.UnpackSize > ((UInt64)1 << 63))
return S_FALSE;
solidRunOffset += ss.UnpackSize;
if (solidRunOffset < ss.UnpackSize)
return S_FALSE;
const UInt32 solidChunkSize = GetUi32(header + 8);
int log = GetLog(solidChunkSize);
if (log < 8 || log > 31)
return S_FALSE;
ss.ChunkSizeBits = log;
ss.Method = GetUi32(header + 12);
UInt64 numChunks64 = (ss.UnpackSize + (((UInt32)1 << ss.ChunkSizeBits) - 1)) >> ss.ChunkSizeBits;
UInt64 sizesBufSize64 = 4 * numChunks64;
ss.HeadersSize = kSolidHeaderSize + sizesBufSize64;
size_t sizesBufSize = (size_t)sizesBufSize64;
if (sizesBufSize != sizesBufSize64)
return E_OUTOFMEMORY;
sizesBuf.AllocAtLeast(sizesBufSize);
RINOK(ReadStream_FALSE(inStream, sizesBuf, sizesBufSize));
size_t numChunks = (size_t)numChunks64;
ss.Chunks.Alloc(numChunks + 1);
UInt64 offset = 0;
size_t c;
for (c = 0; c < numChunks; c++)
{
ss.Chunks[c] = offset;
UInt32 packSize = GetUi32((const Byte *)sizesBuf + c * 4);
offset += packSize;
if (offset < packSize)
return S_FALSE;
}
ss.Chunks[c] = offset;
if (ss.Chunks[0] != 0)
return S_FALSE;
if (ss.HeadersSize + offset != r.PackSize)
return S_FALSE;
}
}
unsigned solidLim = k;
for (k = iii; k < solidLim; k++)
{
CStreamInfo &si = DataStreams[k];
CResource &r = si.Resource;
if (!r.IsSolidSmall())
continue;
if (si.IsEmptyHash())
return S_FALSE;
unsigned solidIndex;
{
UInt64 offset = r.Offset;
for (solidIndex = numSolidsStart;; solidIndex++)
{
if (solidIndex == Solids.Size())
return S_FALSE;
UInt64 unpackSize = Solids[solidIndex].UnpackSize;
if (offset < unpackSize)
break;
offset -= unpackSize;
}
}
CSolid &ss = Solids[solidIndex];
if (r.Offset < ss.SolidOffset)
return S_FALSE;
UInt64 relat = r.Offset - ss.SolidOffset;
if (relat > ss.UnpackSize)
return S_FALSE;
if (r.PackSize > ss.UnpackSize - relat)
return S_FALSE;
r.SolidIndex = solidIndex;
if (ss.FirstSmallStream < 0)
ss.FirstSmallStream = k;
sortedByHash.AddInReserved(k);
// ss.NumRefs++;
}
iii = solidLim;
}
}
if (Solids.IsEmpty())
{
/* We want to check that streams layout is OK.
So we need resources sorted by offset.
Another code can work with non-sorted streams.
NOTE: all WIM programs probably create wim archives with
sorted data streams. So it doesn't call Sort() here. */
{
unsigned i;
for (i = 1; i < DataStreams.Size(); i++)
{
const CStreamInfo &s0 = DataStreams[i - 1];
const CStreamInfo &s1 = DataStreams[i];
if (s0.PartNumber < s1.PartNumber) continue;
if (s0.PartNumber > s1.PartNumber) break;
if (s0.Resource.Offset < s1.Resource.Offset) continue;
if (s0.Resource.Offset > s1.Resource.Offset) break;
if (s0.Resource.PackSize > s1.Resource.PackSize) break;
}
if (i < DataStreams.Size())
{
// return E_FAIL;
DataStreams.Sort(CompareStreamsByPos, NULL);
}
}
for (unsigned i = 1; i < DataStreams.Size(); i++)
{
const CStreamInfo &s0 = DataStreams[i - 1];
const CStreamInfo &s1 = DataStreams[i];
if (s0.PartNumber == s1.PartNumber)
if (s0.Resource.GetEndLimit() > s1.Resource.Offset)
return S_FALSE;
}
}
{
{
const CStreamInfo *streams = &DataStreams.Front();
if (IsOldVersion)
{
sortedByHash.Sort(CompareIDs, (void *)streams);
for (unsigned i = 1; i < sortedByHash.Size(); i++)
if (streams[sortedByHash[i - 1]].Id >=
streams[sortedByHash[i]].Id)
return S_FALSE;
}
else
{
sortedByHash.Sort(CompareHashRefs, (void *)streams);
if (!sortedByHash.IsEmpty())
{
if (IsEmptySha(streams[sortedByHash[0]].Hash))
HeadersError = true;
for (unsigned i = 1; i < sortedByHash.Size(); i++)
if (memcmp(
streams[sortedByHash[i - 1]].Hash,
streams[sortedByHash[i]].Hash,
kHashSize) >= 0)
return S_FALSE;
}
}
}
FOR_VECTOR (i, Items)
{
CItem &item = Items[i];
item.StreamIndex = -1;
const Byte *hash = Images[item.ImageIndex].Meta + item.Offset;
if (IsOldVersion)
{
if (!item.IsDir)
{
hash += (item.IsAltStream ? 0x8 : 0x10);
UInt32 id = GetUi32(hash);
if (id != 0)
item.StreamIndex = FindId(&DataStreams.Front(), sortedByHash, id);
}
}
/*
else if (item.IsDir)
{
// reparse points can have dirs some dir
}
*/
else
{
hash += (item.IsAltStream ? 0x10 : 0x40);
if (!IsEmptySha(hash))
{
item.StreamIndex = FindHash(&DataStreams.Front(), sortedByHash, hash);
}
}
}
}
{
CUIntVector refCounts;
refCounts.ClearAndSetSize(DataStreams.Size());
unsigned i;
for (i = 0; i < DataStreams.Size(); i++)
{
UInt32 startVal = 0;
// const CStreamInfo &s = DataStreams[i];
/*
if (s.Resource.IsMetadata() && s.PartNumber == 1)
startVal = 1;
*/
refCounts[i] = startVal;
}
for (i = 0; i < Items.Size(); i++)
{
int streamIndex = Items[i].StreamIndex;
if (streamIndex >= 0)
refCounts[streamIndex]++;
}
for (i = 0; i < DataStreams.Size(); i++)
{
const CStreamInfo &s = DataStreams[i];
if (s.RefCount != refCounts[i]
&& !s.Resource.IsSolidBig())
{
/*
printf("\ni=%5d si.Ref=%2d realRefs=%2d size=%8d offset=%8x id=%4d ",
i, s.RefCount, refCounts[i], (unsigned)s.Resource.UnpackSize, (unsigned)s.Resource.Offset, s.Id);
*/
RefCountError = true;
}
if (refCounts[i] == 0)
{
const CResource &r = DataStreams[i].Resource;
if (!r.IsSolidBig() || Solids[r.SolidIndex].FirstSmallStream < 0)
{
CItem item;
item.Offset = 0;
item.StreamIndex = i;
item.ImageIndex = -1;
Items.Add(item);
ThereAreDeletedStreams = true;
}
}
}
}
return S_OK;
}
HRESULT CDatabase::GenerateSortedItems(int imageIndex, bool showImageNumber)
{
SortedItems.Clear();
VirtualRoots.Clear();
IndexOfUserImage = imageIndex;
NumExcludededItems = 0;
ExludedItem = -1;
if (Images.Size() != 1 && imageIndex < 0)
showImageNumber = true;
unsigned startItem = 0;
unsigned endItem = 0;
if (imageIndex < 0)
{
endItem = Items.Size();
if (Images.Size() == 1)
{
IndexOfUserImage = 0;
const CImage &image = Images[0];
if (!showImageNumber)
NumExcludededItems = image.NumEmptyRootItems;
}
}
else if ((unsigned)imageIndex < Images.Size())
{
const CImage &image = Images[imageIndex];
startItem = image.StartItem;
endItem = startItem + image.NumItems;
if (!showImageNumber)
NumExcludededItems = image.NumEmptyRootItems;
}
if (NumExcludededItems != 0)
{
ExludedItem = startItem;
startItem += NumExcludededItems;
}
unsigned num = endItem - startItem;
SortedItems.ClearAndSetSize(num);
unsigned i;
for (i = 0; i < num; i++)
SortedItems[i] = startItem + i;
SortedItems.Sort(CompareItems, this);
for (i = 0; i < SortedItems.Size(); i++)
Items[SortedItems[i]].IndexInSorted = i;
if (showImageNumber)
for (i = 0; i < Images.Size(); i++)
{
CImage &image = Images[i];
if (image.NumEmptyRootItems != 0)
continue;
image.VirtualRootIndex = VirtualRoots.Size();
VirtualRoots.Add(i);
}
return S_OK;
}
static void IntVector_SetMinusOne_IfNeed(CIntVector &v, unsigned size)
{
if (v.Size() == size)
return;
v.ClearAndSetSize(size);
int *vals = &v[0];
for (unsigned i = 0; i < size; i++)
vals[i] = -1;
}
HRESULT CDatabase::ExtractReparseStreams(const CObjectVector<CVolume> &volumes, IArchiveOpenCallback *openCallback)
{
ItemToReparse.Clear();
ReparseItems.Clear();
// we don't know about Reparse field for OLD WIM format
if (IsOldVersion)
return S_OK;
CIntVector streamToReparse;
CUnpacker unpacker;
UInt64 totalPackedPrev = 0;
FOR_VECTOR(indexInSorted, SortedItems)
{
// we use sorted items for faster access
unsigned itemIndex = SortedItems[indexInSorted];
const CItem &item = Items[itemIndex];
if (!item.HasMetadata() || item.IsAltStream)
continue;
if (item.ImageIndex < 0)
continue;
const Byte *metadata = Images[item.ImageIndex].Meta + item.Offset;
const UInt32 attrib = Get32(metadata + 8);
if ((attrib & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
continue;
if (item.StreamIndex < 0)
continue; // it's ERROR
const CStreamInfo &si = DataStreams[item.StreamIndex];
if (si.Resource.UnpackSize >= (1 << 16))
continue; // reparse data can not be larger than 64 KB
IntVector_SetMinusOne_IfNeed(streamToReparse, DataStreams.Size());
IntVector_SetMinusOne_IfNeed(ItemToReparse, Items.Size());
const unsigned offset = 0x58; // we don't know about Reparse field for OLD WIM format
UInt32 tag = Get32(metadata + offset);
int reparseIndex = streamToReparse[item.StreamIndex];
CByteBuffer buf;
if (openCallback)
{
if ((unpacker.TotalPacked - totalPackedPrev) >= ((UInt32)1 << 16))
{
UInt64 numFiles = Items.Size();
RINOK(openCallback->SetCompleted(&numFiles, &unpacker.TotalPacked));
totalPackedPrev = unpacker.TotalPacked;
}
}
if (reparseIndex >= 0)
{
const CByteBuffer &reparse = ReparseItems[reparseIndex];
if (tag == Get32(reparse))
{
ItemToReparse[itemIndex] = reparseIndex;
continue;
}
buf = reparse;
// we support that strange and unusual situation with different tags and same reparse data.
}
else
{
/*
if (si.PartNumber >= volumes.Size())
continue;
*/
const CVolume &vol = volumes[si.PartNumber];
/*
if (!vol.Stream)
continue;
*/
Byte digest[kHashSize];
HRESULT res = unpacker.UnpackData(vol.Stream, si.Resource, vol.Header, this, buf, digest);
if (res == S_FALSE)
continue;
RINOK(res);
if (memcmp(digest, si.Hash, kHashSize) != 0
// && !(h.IsOldVersion() && IsEmptySha(si.Hash))
)
{
// setErrorStatus;
continue;
}
}
CByteBuffer &reparse = ReparseItems.AddNew();
reparse.Alloc(8 + buf.Size());
Byte *dest = (Byte *)reparse;
SetUi32(dest, tag);
SetUi32(dest + 4, (UInt32)buf.Size());
if (buf.Size() != 0)
memcpy(dest + 8, buf, buf.Size());
ItemToReparse[itemIndex] = ReparseItems.Size() - 1;
}
return S_OK;
}
static bool ParseNumber64(const AString &s, UInt64 &res)
{
const char *end;
if (s.IsPrefixedBy("0x"))
{
if (s.Len() == 2)
return false;
res = ConvertHexStringToUInt64(s.Ptr(2), &end);
}
else
{
if (s.IsEmpty())
return false;
res = ConvertStringToUInt64(s, &end);
}
return *end == 0;
}
static bool ParseNumber32(const AString &s, UInt32 &res)
{
UInt64 res64;
if (!ParseNumber64(s, res64) || res64 >= ((UInt64)1 << 32))
return false;
res = (UInt32)res64;
return true;
}
static bool ParseTime(const CXmlItem &item, FILETIME &ft, const char *tag)
{
int index = item.FindSubTag(tag);
if (index >= 0)
{
const CXmlItem &timeItem = item.SubItems[index];
UInt32 low = 0, high = 0;
if (ParseNumber32(timeItem.GetSubStringForTag("LOWPART"), low) &&
ParseNumber32(timeItem.GetSubStringForTag("HIGHPART"), high))
{
ft.dwLowDateTime = low;
ft.dwHighDateTime = high;
return true;
}
}
return false;
}
void CImageInfo::Parse(const CXmlItem &item)
{
CTimeDefined = ParseTime(item, CTime, "CREATIONTIME");
MTimeDefined = ParseTime(item, MTime, "LASTMODIFICATIONTIME");
NameDefined = ConvertUTF8ToUnicode(item.GetSubStringForTag("NAME"), Name);
ParseNumber64(item.GetSubStringForTag("DIRCOUNT"), DirCount);
ParseNumber64(item.GetSubStringForTag("FILECOUNT"), FileCount);
IndexDefined = ParseNumber32(item.GetPropVal("INDEX"), Index);
}
void CWimXml::ToUnicode(UString &s)
{
size_t size = Data.Size();
if (size < 2 || (size & 1) != 0 || size > (1 << 24))
return;
const Byte *p = Data;
if (Get16(p) != 0xFEFF)
return;
wchar_t *chars = s.GetBuf((unsigned)(size / 2));
for (size_t i = 2; i < size; i += 2)
{
wchar_t c = Get16(p + i);
if (c == 0)
break;
*chars++ = c;
}
*chars = 0;
s.ReleaseBuf_SetLen((unsigned)(chars - (const wchar_t *)s));
}
bool CWimXml::Parse()
{
IsEncrypted = false;
AString utf;
{
UString s;
ToUnicode(s);
// if (!ConvertUnicodeToUTF8(s, utf)) return false;
ConvertUnicodeToUTF8(s, utf);
}
if (!Xml.Parse(utf))
return false;
if (Xml.Root.Name != "WIM")
return false;
FOR_VECTOR (i, Xml.Root.SubItems)
{
const CXmlItem &item = Xml.Root.SubItems[i];
if (item.IsTagged("IMAGE"))
{
CImageInfo imageInfo;
imageInfo.Parse(item);
if (!imageInfo.IndexDefined)
return false;
if (imageInfo.Index != (UInt32)Images.Size() + 1)
{
// old wim (1.09) uses zero based image index
if (imageInfo.Index != (UInt32)Images.Size())
return false;
}
imageInfo.ItemIndexInXml = i;
Images.Add(imageInfo);
}
if (item.IsTagged("ESD"))
{
FOR_VECTOR (k, item.SubItems)
{
const CXmlItem &item2 = item.SubItems[k];
if (item2.IsTagged("ENCRYPTED"))
IsEncrypted = true;
}
}
}
return true;
}
}}
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