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// Archive/WimIn.cpp
#include "StdAfx.h"
#include "Common/MyCom.h"
#include "Common/IntToString.h"
#include "../../Common/StreamUtils.h"
#include "../../Common/StreamObjects.h"
#include "../../Common/LimitedStreams.h"
#include "../Common/OutStreamWithSha1.h"
#include "../../../../C/CpuArch.h"
#include "WimIn.h"
namespace NArchive{
namespace NWim{
static const int kChunkSizeBits = 15;
static const UInt32 kChunkSize = (1 << kChunkSizeBits);
static void GetFileTimeFromMem(const Byte *p, FILETIME *ft)
{
ft->dwLowDateTime = GetUi32(p);
ft->dwHighDateTime = GetUi32(p + 4);
}
HRESULT CUnpacker::Unpack(IInStream *inStream, const CResource &resource,
ISequentialOutStream *outStream, ICompressProgressInfo *progress)
{
RINOK(inStream->Seek(resource.Offset, STREAM_SEEK_SET, NULL));
CLimitedSequentialInStream *limitedStreamSpec = new CLimitedSequentialInStream();
CMyComPtr<ISequentialInStream> limitedStream = limitedStreamSpec;
limitedStreamSpec->SetStream(inStream);
if (!copyCoder)
{
copyCoderSpec = new NCompress::CCopyCoder;
copyCoder = copyCoderSpec;
}
if (!resource.IsCompressed())
{
if (resource.PackSize != resource.UnpackSize)
return S_FALSE;
limitedStreamSpec->Init(resource.PackSize);
return copyCoder->Code(limitedStreamSpec, outStream, NULL, NULL, progress);
}
if (resource.UnpackSize == 0)
return S_OK;
UInt64 numChunks = (resource.UnpackSize + kChunkSize - 1) >> kChunkSizeBits;
unsigned entrySize = ((resource.UnpackSize > (UInt64)1 << 32) ? 8 : 4);
UInt64 sizesBufSize64 = entrySize * (numChunks - 1);
size_t sizesBufSize = (size_t)sizesBufSize64;
if (sizesBufSize != sizesBufSize64)
return E_OUTOFMEMORY;
if (sizesBufSize > sizesBuf.GetCapacity())
{
sizesBuf.Free();
sizesBuf.SetCapacity(sizesBufSize);
}
RINOK(ReadStream_FALSE(inStream, (Byte *)sizesBuf, sizesBufSize));
const Byte *p = (const Byte *)sizesBuf;
if (!lzxDecoder)
{
lzxDecoderSpec = new NCompress::NLzx::CDecoder(true);
lzxDecoder = lzxDecoderSpec;
RINOK(lzxDecoderSpec->SetParams(kChunkSizeBits));
}
UInt64 baseOffset = resource.Offset + sizesBufSize64;
UInt64 outProcessed = 0;
for (UInt32 i = 0; i < (UInt32)numChunks; i++)
{
UInt64 offset = 0;
if (i > 0)
{
if (entrySize == 4)
offset = GetUi32(p);
else
offset = GetUi64(p);
p += entrySize;
}
UInt64 nextOffset = resource.PackSize - sizesBufSize64;
if (i + 1 < (UInt32)numChunks)
if (entrySize == 4)
nextOffset = GetUi32(p);
else
nextOffset = GetUi64(p);
if (nextOffset < offset)
return S_FALSE;
RINOK(inStream->Seek(baseOffset + offset, STREAM_SEEK_SET, NULL));
UInt64 inSize = nextOffset - offset;
limitedStreamSpec->Init(inSize);
if (progress)
{
RINOK(progress->SetRatioInfo(&offset, &outProcessed));
}
UInt32 outSize = kChunkSize;
if (outProcessed + outSize > resource.UnpackSize)
outSize = (UInt32)(resource.UnpackSize - outProcessed);
UInt64 outSize64 = outSize;
lzxDecoderSpec->SetKeepHistory(false);
ICompressCoder *coder = (inSize == outSize) ? copyCoder : lzxDecoder;
RINOK(coder->Code(limitedStreamSpec, outStream, NULL, &outSize64, NULL));
outProcessed += outSize;
}
return S_OK;
}
HRESULT CUnpacker::Unpack(IInStream *inStream, const CResource &resource,
ISequentialOutStream *outStream, ICompressProgressInfo *progress, Byte *digest)
{
COutStreamWithSha1 *shaStreamSpec = new COutStreamWithSha1();
CMyComPtr<ISequentialOutStream> shaStream = shaStreamSpec;
shaStreamSpec->SetStream(outStream);
shaStreamSpec->Init(digest != NULL);
HRESULT result = Unpack(inStream, resource, shaStream, progress);
if (digest)
shaStreamSpec->Final(digest);
return result;
}
static HRESULT UnpackData(IInStream *inStream, const CResource &resource, CByteBuffer &buf, Byte *digest)
{
size_t size = (size_t)resource.UnpackSize;
if (size != resource.UnpackSize)
return E_OUTOFMEMORY;
buf.Free();
buf.SetCapacity(size);
CSequentialOutStreamImp2 *outStreamSpec = new CSequentialOutStreamImp2();
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
outStreamSpec->Init((Byte *)buf, size);
CUnpacker unpacker;
return unpacker.Unpack(inStream, resource, outStream, NULL, digest);
}
static const UInt32 kSignatureSize = 8;
static const Byte kSignature[kSignatureSize] = { 'M', 'S', 'W', 'I', 'M', 0, 0, 0 };
static void GetResource(const Byte *p, CResource &res)
{
res.Flags = p[7];
res.PackSize = GetUi64(p) & (((UInt64)1 << 56) - 1);
res.Offset = GetUi64(p + 8);
res.UnpackSize = GetUi64(p + 16);
}
static void GetStream(const Byte *p, CStreamInfo &s)
{
GetResource(p, s.Resource);
s.PartNumber = GetUi16(p + 24);
s.RefCount = GetUi32(p + 26);
memcpy(s.Hash, p + 30, kHashSize);
}
static HRESULT ParseDirItem(const Byte *base, size_t pos, size_t size,
const UString &prefix, CObjectVector<CItem> &items)
{
for (;;)
{
if (pos + 8 > size)
return S_FALSE;
const Byte *p = base + pos;
UInt64 length = GetUi64(p);
if (length == 0)
return S_OK;
if (pos + 102 > size || pos + length + 8 > size || length > ((UInt64)1 << 62))
return S_FALSE;
CItem item;
item.Attributes = GetUi32(p + 8);
// item.SecurityId = GetUi32(p + 0xC);
UInt64 subdirOffset = GetUi64(p + 0x10);
GetFileTimeFromMem(p + 0x28, &item.CreationTime);
GetFileTimeFromMem(p + 0x30, &item.LastAccessTime);
GetFileTimeFromMem(p + 0x38, &item.LastWriteTime);
memcpy(item.Hash, p + 0x40, kHashSize);
// UInt16 shortNameLen = GetUi16(p + 98);
UInt16 fileNameLen = GetUi16(p + 100);
size_t tempPos = pos + 102;
if (tempPos + fileNameLen > size)
return S_FALSE;
wchar_t *sz = item.Name.GetBuffer(prefix.Length() + fileNameLen / 2 + 1);
MyStringCopy(sz, (const wchar_t *)prefix);
sz += prefix.Length();
for (UInt16 i = 0; i + 2 <= fileNameLen; i += 2)
*sz++ = GetUi16(base + tempPos + i);
*sz++ = '\0';
item.Name.ReleaseBuffer();
if (fileNameLen == 0 && item.IsDirectory() && !item.HasStream())
{
item.Attributes = 0x10; // some swm archives have system/hidden attributes for root
item.Name.Delete(item.Name.Length() - 1);
}
items.Add(item);
pos += (size_t)length;
if (item.IsDirectory() && (subdirOffset != 0))
{
if (subdirOffset >= size)
return S_FALSE;
RINOK(ParseDirItem(base, (size_t)subdirOffset, size, item.Name + WCHAR_PATH_SEPARATOR, items));
}
}
}
static HRESULT ParseDir(const Byte *base, size_t size,
const UString &prefix, CObjectVector<CItem> &items)
{
size_t pos = 0;
if (pos + 8 > size)
return S_FALSE;
const Byte *p = base + pos;
UInt32 totalLength = GetUi32(p);
// UInt32 numEntries = GetUi32(p + 4);
pos += 8;
{
/*
CRecordVector<UInt64> entryLens;
UInt64 sum = 0;
for (UInt32 i = 0; i < numEntries; i++)
{
if (pos + 8 > size)
return S_FALSE;
UInt64 len = GetUi64(p + pos);
entryLens.Add(len);
sum += len;
pos += 8;
}
pos += sum; // skeep security descriptors
while ((pos & 7) != 0)
pos++;
if (pos != totalLength)
return S_FALSE;
*/
pos = totalLength;
}
return ParseDirItem(base, pos, size, prefix, items);
}
static int CompareHashRefs(const int *p1, const int *p2, void *param)
{
const CRecordVector<CStreamInfo> &streams = *(const CRecordVector<CStreamInfo> *)param;
return memcmp(streams[*p1].Hash, streams[*p2].Hash, kHashSize);
}
static int CompareStreamsByPos(const CStreamInfo *p1, const CStreamInfo *p2, void * /* param */)
{
int res = MyCompare(p1->PartNumber, p2->PartNumber);
if (res != 0)
return res;
return MyCompare(p1->Resource.Offset, p2->Resource.Offset);
}
int CompareItems(void *const *a1, void *const *a2, void * /* param */)
{
const CItem &i1 = **((const CItem **)a1);
const CItem &i2 = **((const CItem **)a2);
if (i1.IsDirectory() != i2.IsDirectory())
return (i1.IsDirectory()) ? 1 : -1;
if (i1.IsDirectory())
return -MyStringCompareNoCase(i1.Name, i2.Name);
int res = MyCompare(i1.StreamIndex, i2.StreamIndex);
if (res != 0)
return res;
return MyStringCompareNoCase(i1.Name, i2.Name);
}
static int FindHash(const CRecordVector<CStreamInfo> &streams,
const CRecordVector<int> &sortedByHash, const Byte *hash)
{
int left = 0, right = streams.Size();
while (left != right)
{
int mid = (left + right) / 2;
int streamIndex = sortedByHash[mid];
UInt32 i;
const Byte *hash2 = streams[streamIndex].Hash;
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;
}
HRESULT ReadHeader(IInStream *inStream, CHeader &h)
{
const UInt32 kHeaderSizeMax = 0xD0;
Byte p[kHeaderSizeMax];
RINOK(ReadStream_FALSE(inStream, p, kHeaderSizeMax));
UInt32 haderSize = GetUi32(p + 8);
if (memcmp(p, kSignature, kSignatureSize) != 0)
return S_FALSE;
if (haderSize < 0x74)
return S_FALSE;
h.Version = GetUi32(p + 0x0C);
h.Flags = GetUi32(p + 0x10);
if (!h.IsSupported())
return S_FALSE;
if (GetUi32(p + 0x14) != kChunkSize)
return S_FALSE;
memcpy(h.Guid, p + 0x18, 16);
h.PartNumber = GetUi16(p + 0x28);
h.NumParts = GetUi16(p + 0x2A);
int offset = 0x2C;
if (h.IsNewVersion())
{
h.NumImages = GetUi32(p + offset);
offset += 4;
}
GetResource(p + offset, h.OffsetResource);
GetResource(p + offset + 0x18, h.XmlResource);
GetResource(p + offset + 0x30, h.MetadataResource);
/*
if (h.IsNewVersion())
{
if (haderSize < 0xD0)
return S_FALSE;
GetResource(p + offset + 0x4C, h.IntegrityResource);
h.BootIndex = GetUi32(p + 0x48);
}
*/
return S_OK;
}
HRESULT ReadStreams(IInStream *inStream, const CHeader &h, CDatabase &db)
{
CByteBuffer offsetBuf;
RINOK(UnpackData(inStream, h.OffsetResource, offsetBuf, NULL));
for (size_t i = 0; i + kStreamInfoSize <= offsetBuf.GetCapacity(); i += kStreamInfoSize)
{
CStreamInfo s;
GetStream((const Byte *)offsetBuf + i, s);
if (s.PartNumber == h.PartNumber)
db.Streams.Add(s);
}
return S_OK;
}
HRESULT OpenArchive(IInStream *inStream, const CHeader &h, CByteBuffer &xml, CDatabase &db)
{
RINOK(UnpackData(inStream, h.XmlResource, xml, NULL));
RINOK(ReadStreams(inStream, h, db));
bool needBootMetadata = !h.MetadataResource.IsEmpty();
if (h.PartNumber == 1)
{
int imageIndex = 1;
for (int j = 0; j < db.Streams.Size(); j++)
{
// if (imageIndex > 1) break;
const CStreamInfo &si = db.Streams[j];
if (!si.Resource.IsMetadata() || si.PartNumber != h.PartNumber)
continue;
Byte hash[kHashSize];
CByteBuffer metadata;
RINOK(UnpackData(inStream, si.Resource, metadata, hash));
if (memcmp(hash, si.Hash, kHashSize) != 0)
return S_FALSE;
wchar_t sz[32];
ConvertUInt64ToString(imageIndex++, sz);
UString s = sz;
s += WCHAR_PATH_SEPARATOR;
RINOK(ParseDir(metadata, metadata.GetCapacity(), s, db.Items));
if (needBootMetadata)
if (h.MetadataResource.Offset == si.Resource.Offset)
needBootMetadata = false;
}
}
if (needBootMetadata)
{
CByteBuffer metadata;
RINOK(UnpackData(inStream, h.MetadataResource, metadata, NULL));
RINOK(ParseDir(metadata, metadata.GetCapacity(), L"0" WSTRING_PATH_SEPARATOR, db.Items));
}
return S_OK;
}
HRESULT SortDatabase(CDatabase &db)
{
db.Streams.Sort(CompareStreamsByPos, NULL);
{
CRecordVector<int> sortedByHash;
{
for (int j = 0; j < db.Streams.Size(); j++)
sortedByHash.Add(j);
sortedByHash.Sort(CompareHashRefs, &db.Streams);
}
for (int i = 0; i < db.Items.Size(); i++)
{
CItem &item = db.Items[i];
item.StreamIndex = -1;
if (item.HasStream())
item.StreamIndex = FindHash(db.Streams, sortedByHash, item.Hash);
}
}
{
CRecordVector<bool> used;
int j;
for (j = 0; j < db.Streams.Size(); j++)
{
const CStreamInfo &s = db.Streams[j];
used.Add(s.Resource.IsMetadata() && s.PartNumber == 1);
}
for (int i = 0; i < db.Items.Size(); i++)
{
CItem &item = db.Items[i];
if (item.StreamIndex >= 0)
used[item.StreamIndex] = true;
}
for (j = 0; j < db.Streams.Size(); j++)
if (!used[j])
{
CItem item;
item.StreamIndex = j;
item.HasMetadata = false;
db.Items.Add(item);
}
}
db.Items.Sort(CompareItems, NULL);
return S_OK;
}
}}
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