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// CpioHandler.cpp
#include "StdAfx.h"
#include "../../../C/CpuArch.h"
#include "../../Common/ComTry.h"
#include "../../Common/StringConvert.h"
#include "../../Common/StringToInt.h"
#include "../../Common/UTFConvert.h"
#include "../../Windows/PropVariant.h"
#include "../../Windows/TimeUtils.h"
#include "../Common/LimitedStreams.h"
#include "../Common/ProgressUtils.h"
#include "../Common/RegisterArc.h"
#include "../Common/StreamUtils.h"
#include "../Compress/CopyCoder.h"
#include "Common/ItemNameUtils.h"
using namespace NWindows;
namespace NArchive {
namespace NCpio {
static const Byte kMagicBin0 = 0xC7;
static const Byte kMagicBin1 = 0x71;
// #define MAGIC_ASCII { '0', '7', '0', '7', '0' }
static const Byte kMagicHex = '1'; // New ASCII Format
static const Byte kMagicHexCrc = '2'; // New CRC Format
static const Byte kMagicOct = '7'; // Portable ASCII Format
static const char *kName_TRAILER = "TRAILER!!!";
static const unsigned k_BinRecord_Size = 2 + 8 * 2 + 2 * 4;
static const unsigned k_OctRecord_Size = 6 + 8 * 6 + 2 * 11;
static const unsigned k_HexRecord_Size = 6 + 13 * 8;
static const unsigned k_RecordSize_Max = k_HexRecord_Size;
/*
struct CBinRecord
{
unsigned short c_magic;
short c_dev;
unsigned short c_ino;
unsigned short c_mode;
unsigned short c_uid;
unsigned short c_gid;
unsigned short c_nlink;
short c_rdev;
unsigned short c_mtimes[2];
unsigned short c_namesize;
unsigned short c_filesizes[2];
};
struct CHexRecord
{
char Magic[6];
char inode[8];
char Mode[8];
char UID[8];
char GID[8];
char nlink[8];
char mtime[8];
char Size[8]; // must be 0 for FIFOs and directories
char DevMajor[8];
char DevMinor[8];
char RDevMajor[8]; //only valid for chr and blk special files
char RDevMinor[8]; //only valid for chr and blk special files
char NameSize[8]; // count includes terminating NUL in pathname
char ChkSum[8]; // 0 for "new" portable format; for CRC format the sum of all the bytes in the file
};
*/
enum EType
{
k_Type_BinLe,
k_Type_BinBe,
k_Type_Oct,
k_Type_Hex,
k_Type_HexCrc
};
static const char * const k_Types[] =
{
"Binary LE"
, "Binary BE"
, "Portable ASCII"
, "New ASCII"
, "New CRC"
};
struct CItem
{
AString Name;
UInt32 inode;
UInt32 Mode;
UInt32 UID;
UInt32 GID;
UInt64 Size;
UInt32 MTime;
UInt32 NumLinks;
UInt32 DevMajor;
UInt32 DevMinor;
UInt32 RDevMajor;
UInt32 RDevMinor;
UInt32 ChkSum;
UInt32 Align;
EType Type;
UInt32 HeaderSize;
UInt64 HeaderPos;
bool IsBin() const { return Type == k_Type_BinLe || Type == k_Type_BinBe; }
bool IsCrcFormat() const { return Type == k_Type_HexCrc; }
bool IsDir() const { return (Mode & 0170000) == 0040000; }
bool IsTrailer() const { return strcmp(Name, kName_TRAILER) == 0; }
UInt64 GetDataPosition() const { return HeaderPos + HeaderSize; }
};
enum EErrorType
{
k_ErrorType_OK,
k_ErrorType_Corrupted,
k_ErrorType_UnexpectedEnd,
};
struct CInArchive
{
ISequentialInStream *Stream;
UInt64 Processed;
HRESULT Read(void *data, size_t *size);
HRESULT GetNextItem(CItem &item, EErrorType &errorType);
};
HRESULT CInArchive::Read(void *data, size_t *size)
{
HRESULT res = ReadStream(Stream, data, size);
Processed += *size;
return res;
}
static bool ReadHex(const Byte *p, UInt32 &resVal)
{
char sz[16];
memcpy(sz, p, 8);
sz[8] = 0;
const char *end;
resVal = ConvertHexStringToUInt32(sz, &end);
return (unsigned)(end - sz) == 8;
}
static bool ReadOct6(const Byte *p, UInt32 &resVal)
{
char sz[16];
memcpy(sz, p, 6);
sz[6] = 0;
const char *end;
resVal = ConvertOctStringToUInt32(sz, &end);
return (unsigned)(end - sz) == 6;
}
static bool ReadOct11(const Byte *p, UInt64 &resVal)
{
char sz[16];
memcpy(sz, p, 11);
sz[11] = 0;
const char *end;
resVal = ConvertOctStringToUInt64(sz, &end);
return (unsigned)(end - sz) == 11;
}
#define READ_HEX(y) { if (!ReadHex(p2, y)) return S_OK; p2 += 8; }
#define READ_OCT_6(y) { if (!ReadOct6(p2, y)) return S_OK; p2 += 6; }
#define READ_OCT_11(y) { if (!ReadOct11(p2, y)) return S_OK; p2 += 11; }
static UInt32 GetAlignedSize(UInt32 size, UInt32 align)
{
while ((size & (align - 1)) != 0)
size++;
return size;
}
static UInt16 Get16(const Byte *p, bool be) { if (be) return GetBe16(p); return GetUi16(p); }
static UInt32 Get32(const Byte *p, bool be) { return ((UInt32)Get16(p, be) << 16) + Get16(p + 2, be); }
#define G16(offs, v) v = Get16(p + (offs), be)
#define G32(offs, v) v = Get32(p + (offs), be)
static const unsigned kNameSizeMax = 1 << 12;
API_FUNC_static_IsArc IsArc_Cpio(const Byte *p, size_t size)
{
if (size < k_BinRecord_Size)
return k_IsArc_Res_NEED_MORE;
UInt32 nameSize;
UInt32 numLinks;
if (p[0] == '0')
{
if (p[1] != '7' ||
p[2] != '0' ||
p[3] != '7' ||
p[4] != '0')
return k_IsArc_Res_NO;
if (p[5] == '7')
{
if (size < k_OctRecord_Size)
return k_IsArc_Res_NEED_MORE;
for (int i = 6; i < k_OctRecord_Size; i++)
{
char c = p[i];
if (c < '0' || c > '7')
return k_IsArc_Res_NO;
}
ReadOct6(p + 6 * 6, numLinks);
ReadOct6(p + 8 * 6 + 11, nameSize);
}
else if (p[5] == '1' || p[5] == '2')
{
if (size < k_HexRecord_Size)
return k_IsArc_Res_NEED_MORE;
for (int i = 6; i < k_HexRecord_Size; i++)
{
char c = p[i];
if ((c < '0' || c > '9') &&
(c < 'A' || c > 'F') &&
(c < 'a' || c > 'f'))
return k_IsArc_Res_NO;
}
ReadHex(p + 6 + 4 * 8, numLinks);
ReadHex(p + 6 + 11 * 8, nameSize);
}
else
return k_IsArc_Res_NO;
}
else
{
UInt32 rDevMinor;
if (p[0] == kMagicBin0 && p[1] == kMagicBin1)
{
numLinks = GetUi16(p + 12);
rDevMinor = GetUi16(p + 14);
nameSize = GetUi16(p + 20);
}
else if (p[0] == kMagicBin1 && p[1] == kMagicBin0)
{
numLinks = GetBe16(p + 12);
rDevMinor = GetBe16(p + 14);
nameSize = GetBe16(p + 20);
}
else
return k_IsArc_Res_NO;
if (rDevMinor != 0)
return k_IsArc_Res_NO;
if (nameSize > (1 << 8))
return k_IsArc_Res_NO;
}
if (numLinks == 0 || numLinks >= (1 << 10))
return k_IsArc_Res_NO;
if (nameSize == 0 || nameSize > kNameSizeMax)
return k_IsArc_Res_NO;
return k_IsArc_Res_YES;
}
}
#define READ_STREAM(_dest_, _size_) \
{ size_t processed = (_size_); RINOK(Read(_dest_, &processed)); \
if (processed != (_size_)) { errorType = k_ErrorType_UnexpectedEnd; return S_OK; } }
HRESULT CInArchive::GetNextItem(CItem &item, EErrorType &errorType)
{
errorType = k_ErrorType_Corrupted;
Byte p[k_RecordSize_Max];
READ_STREAM(p, k_BinRecord_Size)
UInt32 nameSize;
if (p[0] != '0')
{
bool be;
if (p[0] == kMagicBin0 && p[1] == kMagicBin1) { be = false; item.Type = k_Type_BinLe; }
else if (p[0] == kMagicBin1 && p[1] == kMagicBin0) { be = true; item.Type = k_Type_BinBe; }
else return S_FALSE;
item.Align = 2;
item.DevMajor = 0;
item.RDevMajor =0;
item.ChkSum = 0;
G16(2, item.DevMinor);
G16(4, item.inode);
G16(6, item.Mode);
G16(8, item.UID);
G16(10, item.GID);
G16(12, item.NumLinks);
G16(14, item.RDevMinor);
G32(16, item.MTime);
G16(20, nameSize);
G32(22, item.Size);
/*
if (item.RDevMinor != 0)
return S_FALSE;
*/
item.HeaderSize = GetAlignedSize(nameSize + k_BinRecord_Size, item.Align);
nameSize = item.HeaderSize - k_BinRecord_Size;
}
else
{
if (p[1] != '7' ||
p[2] != '0' ||
p[3] != '7' ||
p[4] != '0')
return S_FALSE;
if (p[5] == kMagicOct)
{
item.Type = k_Type_Oct;
READ_STREAM(p + k_BinRecord_Size, k_OctRecord_Size - k_BinRecord_Size)
item.Align = 1;
item.DevMajor = 0;
item.RDevMajor = 0;
const Byte *p2 = p + 6;
READ_OCT_6(item.DevMinor);
READ_OCT_6(item.inode);
READ_OCT_6(item.Mode);
READ_OCT_6(item.UID);
READ_OCT_6(item.GID);
READ_OCT_6(item.NumLinks);
READ_OCT_6(item.RDevMinor);
{
UInt64 mTime64;
READ_OCT_11(mTime64);
item.MTime = 0;
if (mTime64 < (UInt32)(Int32)-1)
item.MTime = (UInt32)mTime64;
}
READ_OCT_6(nameSize);
READ_OCT_11(item.Size); // ?????
item.HeaderSize = GetAlignedSize(nameSize + k_OctRecord_Size, item.Align);
nameSize = item.HeaderSize - k_OctRecord_Size;
}
else
{
if (p[5] == kMagicHex)
item.Type = k_Type_Hex;
else if (p[5] == kMagicHexCrc)
item.Type = k_Type_HexCrc;
else
return S_FALSE;
READ_STREAM(p + k_BinRecord_Size, k_HexRecord_Size - k_BinRecord_Size)
item.Align = 4;
const Byte *p2 = p + 6;
READ_HEX(item.inode);
READ_HEX(item.Mode);
READ_HEX(item.UID);
READ_HEX(item.GID);
READ_HEX(item.NumLinks);
READ_HEX(item.MTime);
{
UInt32 size32;
READ_HEX(size32);
item.Size = size32;
}
READ_HEX(item.DevMajor);
READ_HEX(item.DevMinor);
READ_HEX(item.RDevMajor);
READ_HEX(item.RDevMinor);
READ_HEX(nameSize);
READ_HEX(item.ChkSum);
if (nameSize >= kNameSizeMax)
return S_OK;
item.HeaderSize = GetAlignedSize(nameSize + k_HexRecord_Size, item.Align);
nameSize = item.HeaderSize - k_HexRecord_Size;
}
}
if (nameSize > kNameSizeMax)
return S_FALSE;
if (nameSize == 0 || nameSize >= kNameSizeMax)
return S_OK;
char *s = item.Name.GetBuf(nameSize);
size_t processedSize = nameSize;
RINOK(Read(s, &processedSize));
item.Name.ReleaseBuf_CalcLen(nameSize);
if (processedSize != nameSize)
{
errorType = k_ErrorType_UnexpectedEnd;
return S_OK;
}
errorType = k_ErrorType_OK;
return S_OK;
}
class CHandler:
public IInArchive,
public IInArchiveGetStream,
public CMyUnknownImp
{
CObjectVector<CItem> _items;
CMyComPtr<IInStream> _stream;
UInt64 _phySize;
EType _Type;
EErrorType _error;
bool _isArc;
public:
MY_UNKNOWN_IMP2(IInArchive, IInArchiveGetStream)
INTERFACE_IInArchive(;)
STDMETHOD(GetStream)(UInt32 index, ISequentialInStream **stream);
};
static const Byte kArcProps[] =
{
kpidSubType
};
static const Byte kProps[] =
{
kpidPath,
kpidIsDir,
kpidSize,
kpidMTime,
kpidPosixAttrib,
kpidLinks
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps
STDMETHODIMP CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
switch (propID)
{
case kpidSubType: prop = k_Types[(unsigned)_Type]; break;
case kpidPhySize: prop = _phySize; break;
case kpidErrorFlags:
{
UInt32 v = 0;
if (!_isArc)
v |= kpv_ErrorFlags_IsNotArc;
switch (_error)
{
case k_ErrorType_UnexpectedEnd: v |= kpv_ErrorFlags_UnexpectedEnd; break;
case k_ErrorType_Corrupted: v |= kpv_ErrorFlags_HeadersError; break;
}
prop = v;
break;
}
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Open(IInStream *stream, const UInt64 *, IArchiveOpenCallback *callback)
{
COM_TRY_BEGIN
{
Close();
UInt64 endPos = 0;
RINOK(stream->Seek(0, STREAM_SEEK_END, &endPos));
RINOK(stream->Seek(0, STREAM_SEEK_SET, NULL));
if (callback)
{
RINOK(callback->SetTotal(NULL, &endPos));
}
_items.Clear();
CInArchive arc;
arc.Stream = stream;
arc.Processed = 0;
for (;;)
{
CItem item;
item.HeaderPos = arc.Processed;
HRESULT result = arc.GetNextItem(item, _error);
if (result == S_FALSE)
return S_FALSE;
if (result != S_OK)
return S_FALSE;
if (_error != k_ErrorType_OK)
{
if (_error == k_ErrorType_Corrupted)
arc.Processed = item.HeaderPos;
break;
}
if (_items.IsEmpty())
_Type = item.Type;
else if (_items.Back().Type != item.Type)
{
_error = k_ErrorType_Corrupted;
arc.Processed = item.HeaderPos;
break;
}
if (item.IsTrailer())
break;
_items.Add(item);
{
// archive.SkipDataRecords(item.Size, item.Align);
UInt64 dataSize = item.Size;
UInt32 align = item.Align;
while ((dataSize & (align - 1)) != 0)
dataSize++;
// _error = k_ErrorType_UnexpectedEnd; break;
arc.Processed += dataSize;
if (arc.Processed > endPos)
{
_error = k_ErrorType_UnexpectedEnd;
break;
}
UInt64 newPostion;
RINOK(stream->Seek(dataSize, STREAM_SEEK_CUR, &newPostion));
if (arc.Processed != newPostion)
return E_FAIL;
}
if (callback && (_items.Size() & 0xFF) == 0)
{
UInt64 numFiles = _items.Size();
RINOK(callback->SetCompleted(&numFiles, &item.HeaderPos));
}
}
_phySize = arc.Processed;
if (_error != k_ErrorType_OK)
{
if (_items.Size() == 0)
return S_FALSE;
if (_items.Size() == 1 && _items[0].IsBin())
{
// probably it's false detected archive. So we return error
return S_FALSE;
}
}
else
{
// Read tailing zeros.
// Most of cpio files use 512-bytes aligned zeros
UInt64 pos = arc.Processed;
const UInt32 kTailSize_MAX = 1 << 9;
Byte buf[kTailSize_MAX];
UInt32 rem = (kTailSize_MAX - (UInt32)pos) & (kTailSize_MAX - 1);
if (rem != 0)
{
rem++; // we need to see that it's end of file
size_t processed = rem;
RINOK(ReadStream(stream, buf, &processed));
if (processed < rem)
{
unsigned i;
for (i = 0; i < processed && buf[i] == 0; i++);
if (i == processed)
_phySize += processed;
}
}
}
_isArc = true;
_stream = stream;
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::Close()
{
_items.Clear();
_stream.Release();
_phySize = 0;
_Type = k_Type_BinLe;
_isArc = false;
_error = k_ErrorType_OK;
return S_OK;
}
STDMETHODIMP CHandler::GetNumberOfItems(UInt32 *numItems)
{
*numItems = _items.Size();
return S_OK;
}
STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value)
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
const CItem &item = _items[index];
switch (propID)
{
case kpidPath:
{
UString res;
bool needConvert = true;
#ifdef _WIN32
if (ConvertUTF8ToUnicode(item.Name, res))
needConvert = false;
#endif
if (needConvert)
res = MultiByteToUnicodeString(item.Name, CP_OEMCP);
prop = NItemName::GetOSName(res);
break;
}
case kpidIsDir: prop = item.IsDir(); break;
case kpidSize:
case kpidPackSize:
prop = (UInt64)item.Size;
break;
case kpidMTime:
{
if (item.MTime != 0)
{
FILETIME utc;
NTime::UnixTimeToFileTime(item.MTime, utc);
prop = utc;
}
break;
}
case kpidPosixAttrib: prop = item.Mode; break;
case kpidLinks: prop = item.NumLinks; break;
/*
case kpidinode: prop = item.inode; break;
case kpidiChkSum: prop = item.ChkSum; break;
*/
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
class COutStreamWithSum:
public ISequentialOutStream,
public CMyUnknownImp
{
CMyComPtr<ISequentialOutStream> _stream;
UInt64 _size;
UInt32 _crc;
bool _calculate;
public:
MY_UNKNOWN_IMP
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
void SetStream(ISequentialOutStream *stream) { _stream = stream; }
void ReleaseStream() { _stream.Release(); }
void Init(bool calculate = true)
{
_size = 0;
_calculate = calculate;
_crc = 0;
}
void EnableCalc(bool calculate) { _calculate = calculate; }
void InitCRC() { _crc = 0; }
UInt64 GetSize() const { return _size; }
UInt32 GetCRC() const { return _crc; }
};
STDMETHODIMP COutStreamWithSum::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
HRESULT result = S_OK;
if (_stream)
result = _stream->Write(data, size, &size);
if (_calculate)
{
UInt32 crc = 0;
for (UInt32 i = 0; i < size; i++)
crc += (UInt32)(((const Byte *)data)[i]);
_crc += crc;
}
if (processedSize)
*processedSize = size;
return result;
}
STDMETHODIMP CHandler::Extract(const UInt32 *indices, UInt32 numItems,
Int32 testMode, IArchiveExtractCallback *extractCallback)
{
COM_TRY_BEGIN
bool allFilesMode = (numItems == (UInt32)(Int32)-1);
if (allFilesMode)
numItems = _items.Size();
if (numItems == 0)
return S_OK;
UInt64 totalSize = 0;
UInt32 i;
for (i = 0; i < numItems; i++)
totalSize += _items[allFilesMode ? i : indices[i]].Size;
extractCallback->SetTotal(totalSize);
UInt64 currentTotalSize = 0;
NCompress::CCopyCoder *copyCoderSpec = new NCompress::CCopyCoder();
CMyComPtr<ICompressCoder> copyCoder = copyCoderSpec;
CLocalProgress *lps = new CLocalProgress;
CMyComPtr<ICompressProgressInfo> progress = lps;
lps->Init(extractCallback, false);
CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream;
CMyComPtr<ISequentialInStream> inStream(streamSpec);
streamSpec->SetStream(_stream);
COutStreamWithSum *outStreamSumSpec = new COutStreamWithSum;
CMyComPtr<ISequentialOutStream> outStreamSum(outStreamSumSpec);
for (i = 0; i < numItems; i++)
{
lps->InSize = lps->OutSize = currentTotalSize;
RINOK(lps->SetCur());
CMyComPtr<ISequentialOutStream> outStream;
Int32 askMode = testMode ?
NExtract::NAskMode::kTest :
NExtract::NAskMode::kExtract;
Int32 index = allFilesMode ? i : indices[i];
const CItem &item = _items[index];
RINOK(extractCallback->GetStream(index, &outStream, askMode));
currentTotalSize += item.Size;
if (item.IsDir())
{
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK));
continue;
}
if (!testMode && !outStream)
continue;
outStreamSumSpec->Init(item.IsCrcFormat());
outStreamSumSpec->SetStream(outStream);
outStream.Release();
RINOK(extractCallback->PrepareOperation(askMode));
RINOK(_stream->Seek(item.GetDataPosition(), STREAM_SEEK_SET, NULL));
streamSpec->Init(item.Size);
RINOK(copyCoder->Code(inStream, outStreamSum, NULL, NULL, progress));
outStreamSumSpec->ReleaseStream();
Int32 res = NExtract::NOperationResult::kDataError;
if (copyCoderSpec->TotalSize == item.Size)
{
res = NExtract::NOperationResult::kOK;
if (item.IsCrcFormat() && item.ChkSum != outStreamSumSpec->GetCRC())
res = NExtract::NOperationResult::kCRCError;
}
RINOK(extractCallback->SetOperationResult(res));
}
return S_OK;
COM_TRY_END
}
STDMETHODIMP CHandler::GetStream(UInt32 index, ISequentialInStream **stream)
{
COM_TRY_BEGIN
const CItem &item = _items[index];
return CreateLimitedInStream(_stream, item.GetDataPosition(), item.Size, stream);
COM_TRY_END
}
static const Byte k_Signature[] = {
5, '0', '7', '0', '7', '0',
2, kMagicBin0, kMagicBin1,
2, kMagicBin1, kMagicBin0 };
REGISTER_ARC_I(
"Cpio", "cpio", 0, 0xED,
k_Signature,
0,
NArcInfoFlags::kMultiSignature,
IsArc_Cpio)
}}
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