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nsis-plugin-ns7zip/versions/25.01/CPP/7zip/Archive/XarHandler.cpp
T
Simone d074cc7c07 chore: initial commit (extracted from Launchers monorepo) 
Plugin: ns7zip v2.0.0
Architectures: x86-ansi, x86-unicode, amd64-unicode
License: LGPL-2.1-or-later
2026-04-29 14:07:51 +02:00

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// XarHandler.cpp
#include "StdAfx.h"
#include "../../../C/Sha256.h"
#include "../../../C/Sha512.h"
#include "../../../C/CpuArch.h"
#include "../../Common/ComTry.h"
#include "../../Common/MyLinux.h"
#include "../../Common/MyXml.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/StreamObjects.h"
#include "../Common/StreamUtils.h"
#include "../Compress/BZip2Decoder.h"
#include "../Compress/CopyCoder.h"
#include "../Compress/ZlibDecoder.h"
#include "Common/OutStreamWithSha1.h"
using namespace NWindows;
#define XAR_SHOW_RAW
#define Get16(p) GetBe16(p)
#define Get32(p) GetBe32(p)
#define Get64(p) GetBe64(p)
namespace NArchive {
namespace NXar {
Z7_CLASS_IMP_NOQIB_1(
CInStreamWithSha256
, ISequentialInStream
)
bool _sha512Mode;
CMyComPtr<ISequentialInStream> _stream;
CAlignedBuffer1 _sha256;
CAlignedBuffer1 _sha512;
UInt64 _size;
CSha256 *Sha256() { return (CSha256 *)(void *)(Byte *)_sha256; }
CSha512 *Sha512() { return (CSha512 *)(void *)(Byte *)_sha512; }
public:
CInStreamWithSha256():
_sha256(sizeof(CSha256)),
_sha512(sizeof(CSha512))
{}
void SetStream(ISequentialInStream *stream) { _stream = stream; }
void Init(bool sha512Mode)
{
_sha512Mode = sha512Mode;
_size = 0;
if (sha512Mode)
Sha512_Init(Sha512(), SHA512_DIGEST_SIZE);
else
Sha256_Init(Sha256());
}
void ReleaseStream() { _stream.Release(); }
UInt64 GetSize() const { return _size; }
void Final256(Byte *digest) { Sha256_Final(Sha256(), digest); }
void Final512(Byte *digest) { Sha512_Final(Sha512(), digest, SHA512_DIGEST_SIZE); }
};
Z7_COM7F_IMF(CInStreamWithSha256::Read(void *data, UInt32 size, UInt32 *processedSize))
{
UInt32 realProcessedSize;
const HRESULT result = _stream->Read(data, size, &realProcessedSize);
_size += realProcessedSize;
if (_sha512Mode)
Sha512_Update(Sha512(), (const Byte *)data, realProcessedSize);
else
Sha256_Update(Sha256(), (const Byte *)data, realProcessedSize);
if (processedSize)
*processedSize = realProcessedSize;
return result;
}
Z7_CLASS_IMP_NOQIB_1(
COutStreamWithSha256
, ISequentialOutStream
)
bool _sha512Mode;
CMyComPtr<ISequentialOutStream> _stream;
CAlignedBuffer1 _sha256;
CAlignedBuffer1 _sha512;
UInt64 _size;
CSha256 *Sha256() { return (CSha256 *)(void *)(Byte *)_sha256; }
CSha512 *Sha512() { return (CSha512 *)(void *)(Byte *)_sha512; }
public:
COutStreamWithSha256():
_sha256(sizeof(CSha256)),
_sha512(sizeof(CSha512))
{}
void SetStream(ISequentialOutStream *stream) { _stream = stream; }
void ReleaseStream() { _stream.Release(); }
void Init(bool sha512Mode)
{
_sha512Mode = sha512Mode;
_size = 0;
if (sha512Mode)
Sha512_Init(Sha512(), SHA512_DIGEST_SIZE);
else
Sha256_Init(Sha256());
}
UInt64 GetSize() const { return _size; }
void Final256(Byte *digest) { Sha256_Final(Sha256(), digest); }
void Final512(Byte *digest) { Sha512_Final(Sha512(), digest, SHA512_DIGEST_SIZE); }
};
Z7_COM7F_IMF(COutStreamWithSha256::Write(const void *data, UInt32 size, UInt32 *processedSize))
{
HRESULT result = S_OK;
if (_stream)
result = _stream->Write(data, size, &size);
// if (_calculate)
if (_sha512Mode)
Sha512_Update(Sha512(), (const Byte *)data, size);
else
Sha256_Update(Sha256(), (const Byte *)data, size);
_size += size;
if (processedSize)
*processedSize = size;
return result;
}
// we limit supported xml sizes:
// ((size_t)1 << (sizeof(size_t) / 2 + 28)) - (1u << 14);
static const size_t kXmlSizeMax = ((size_t)1 << 30) - (1u << 14);
static const size_t kXmlPackSizeMax = kXmlSizeMax;
#define XAR_CKSUM_NONE 0
#define XAR_CKSUM_SHA1 1
#define XAR_CKSUM_MD5 2
#define XAR_CKSUM_SHA256 3
#define XAR_CKSUM_SHA512 4
// #define XAR_CKSUM_OTHER 3
// fork version of xar can use (3) as special case,
// where name of hash is stored as string at the end of header
// we do not support such hash still.
static const char * const k_ChecksumNames[] =
{
"NONE"
, "SHA1"
, "MD5"
, "SHA256"
, "SHA512"
};
static unsigned GetHashSize(int algo)
{
if (algo <= XAR_CKSUM_NONE || algo > XAR_CKSUM_SHA512)
return 0;
if (algo == XAR_CKSUM_SHA1)
return SHA1_DIGEST_SIZE;
return (16u >> XAR_CKSUM_MD5) << algo;
}
#define METHOD_NAME_ZLIB "zlib"
static int Find_ChecksumId_for_Name(const AString &style)
{
for (unsigned i = 0; i < Z7_ARRAY_SIZE(k_ChecksumNames); i++)
{
// old xars used upper case in "style"
// new xars use lower case in "style"
if (style.IsEqualTo_Ascii_NoCase(k_ChecksumNames[i]))
return (int)i;
}
return -1;
}
struct CCheckSum
{
int AlgoNumber;
bool Error;
CByteBuffer Data;
AString Style;
CCheckSum(): AlgoNumber(-1), Error(false) {}
void AddNameToString(AString &s) const;
};
void CCheckSum::AddNameToString(AString &s) const
{
if (Style.IsEmpty())
s.Add_OptSpaced("NO-CHECKSUM");
else
{
s.Add_OptSpaced(Style);
if (Error)
s += "-ERROR";
}
}
struct CFile
{
bool IsDir;
bool Is_SymLink;
bool HasData;
bool Mode_Defined;
bool INode_Defined;
bool UserId_Defined;
bool GroupId_Defined;
// bool Device_Defined;
bool Id_Defined;
int Parent;
UInt32 Mode;
UInt64 Size;
UInt64 PackSize;
UInt64 Offset;
UInt64 MTime;
UInt64 CTime;
UInt64 ATime;
UInt64 INode;
UInt64 UserId;
UInt64 GroupId;
// UInt64 Device;
AString Name;
AString Method;
AString User;
AString Group;
// AString Id;
AString Type;
AString Link;
// AString LinkType;
// AString LinkFrom;
UInt64 Id;
CCheckSum extracted_checksum;
CCheckSum archived_checksum;
CFile(int parent):
IsDir(false),
Is_SymLink(false),
HasData(false),
Mode_Defined(false),
INode_Defined(false),
UserId_Defined(false),
GroupId_Defined(false),
// Device_Defined(false),
Id_Defined(false),
Parent(parent),
Mode(0),
Size(0), PackSize(0), Offset(0),
MTime(0), CTime(0), ATime(0),
INode(0)
{}
bool IsCopyMethod() const
{
return Method.IsEmpty() || Method.IsEqualTo("octet-stream");
}
void UpdateTotalPackSize(UInt64 &totalSize) const
{
const UInt64 t = Offset + PackSize;
if (t >= Offset)
if (totalSize < t)
totalSize = t;
}
};
Z7_CLASS_IMP_CHandler_IInArchive_2(
IArchiveGetRawProps,
IInArchiveGetStream
)
bool _is_pkg;
bool _toc_CrcError;
CObjectVector<CFile> _files;
CMyComPtr<IInStream> _inStream;
UInt64 _dataStartPos;
UInt64 _phySize;
CAlignedBuffer _xmlBuf;
size_t _xmlLen;
// UInt64 CreationTime;
AString CreationTime_String;
UInt32 _checkSumAlgo;
Int32 _mainSubfile;
HRESULT Open2(IInStream *stream);
};
static const Byte kArcProps[] =
{
kpidSubType,
// kpidHeadersSize,
kpidMethod,
kpidCTime
};
// #define kpidLinkType 250
// #define kpidLinkFrom 251
static const Byte kProps[] =
{
kpidPath,
kpidSize,
kpidPackSize,
kpidMTime,
kpidCTime,
kpidATime,
kpidPosixAttrib,
kpidType,
kpidUser,
kpidGroup,
kpidUserId,
kpidGroupId,
kpidINode,
// kpidDeviceMajor,
// kpidDeviceMinor,
kpidSymLink,
// kpidLinkType,
// kpidLinkFrom,
kpidMethod,
kpidId,
kpidOffset
};
IMP_IInArchive_Props
IMP_IInArchive_ArcProps
static bool ParseUInt64(const CXmlItem &item, const char *name, UInt64 &res)
{
const AString s (item.GetSubStringForTag(name));
if (s.IsEmpty())
return false;
const char *end;
res = ConvertStringToUInt64(s, &end);
return *end == 0;
}
#define PARSE_NUM(_num_, _dest_) \
{ const char *end; _dest_ = ConvertStringToUInt32(p, &end); \
if ((unsigned)(end - p) != _num_) return 0; \
p += _num_ + 1; }
static UInt64 ParseTime(const CXmlItem &item, const char *name /* , bool z_isRequired */ )
{
const AString s (item.GetSubStringForTag(name));
if (s.Len() < 20 /* (z_isRequired ? 20u : 19u) */)
return 0;
const char *p = s;
if (p[ 4] != '-' ||
p[ 7] != '-' ||
p[10] != 'T' ||
p[13] != ':' ||
p[16] != ':')
return 0;
// if (z_isRequired)
if (p[19] != 'Z')
return 0;
UInt32 year, month, day, hour, min, sec;
PARSE_NUM(4, year)
PARSE_NUM(2, month)
PARSE_NUM(2, day)
PARSE_NUM(2, hour)
PARSE_NUM(2, min)
PARSE_NUM(2, sec)
UInt64 numSecs;
if (!NTime::GetSecondsSince1601(year, month, day, hour, min, sec, numSecs))
return 0;
return numSecs * 10000000;
}
static void ParseChecksum(const CXmlItem &item, const char *name, CCheckSum &checksum)
{
const CXmlItem *checkItem = item.FindSubTag_GetPtr(name);
if (!checkItem)
return; // false;
checksum.Style = checkItem->GetPropVal("style");
const AString s (checkItem->GetSubString());
if ((s.Len() & 1) == 0 && s.Len() <= (2u << 7)) // 1024-bit max
{
const size_t size = s.Len() / 2;
CByteBuffer temp(size);
if ((size_t)(ParseHexString(s, temp) - temp) == size)
{
checksum.Data = temp;
const int index = Find_ChecksumId_for_Name(checksum.Style);
if (index >= 0 && checksum.Data.Size() == GetHashSize(index))
{
checksum.AlgoNumber = index;
return;
}
}
}
checksum.Error = true;
}
static bool AddItem(const CXmlItem &item, CObjectVector<CFile> &files, int parent, int level)
{
if (!item.IsTag)
return true;
if (level >= 1024)
return false;
if (item.Name.IsEqualTo("file"))
{
CFile file(parent);
parent = (int)files.Size();
{
const AString id = item.GetPropVal("id");
const char *end;
file.Id = ConvertStringToUInt64(id, &end);
if (*end == 0)
file.Id_Defined = true;
}
file.Name = item.GetSubStringForTag("name");
z7_xml_DecodeString(file.Name);
{
const CXmlItem *typeItem = item.FindSubTag_GetPtr("type");
if (typeItem)
{
file.Type = typeItem->GetSubString();
// file.LinkFrom = typeItem->GetPropVal("link");
if (file.Type.IsEqualTo("directory"))
file.IsDir = true;
else
{
// file.IsDir = false;
/*
else if (file.Type.IsEqualTo("file"))
{}
else if (file.Type.IsEqualTo("hardlink"))
{}
else
*/
if (file.Type.IsEqualTo("symlink"))
file.Is_SymLink = true;
// file.IsDir = false;
}
}
}
{
const CXmlItem *linkItem = item.FindSubTag_GetPtr("link");
if (linkItem)
{
// file.LinkType = linkItem->GetPropVal("type");
file.Link = linkItem->GetSubString();
z7_xml_DecodeString(file.Link);
}
}
const CXmlItem *dataItem = item.FindSubTag_GetPtr("data");
if (dataItem && !file.IsDir)
{
file.HasData = true;
if (!ParseUInt64(*dataItem, "size", file.Size))
return false;
if (!ParseUInt64(*dataItem, "length", file.PackSize))
return false;
if (!ParseUInt64(*dataItem, "offset", file.Offset))
return false;
ParseChecksum(*dataItem, "extracted-checksum", file.extracted_checksum);
ParseChecksum(*dataItem, "archived-checksum", file.archived_checksum);
const CXmlItem *encodingItem = dataItem->FindSubTag_GetPtr("encoding");
if (encodingItem)
{
AString s (encodingItem->GetPropVal("style"));
if (!s.IsEmpty())
{
const AString appl ("application/");
if (s.IsPrefixedBy(appl))
{
s.DeleteFrontal(appl.Len());
const AString xx ("x-");
if (s.IsPrefixedBy(xx))
{
s.DeleteFrontal(xx.Len());
if (s.IsEqualTo("gzip"))
s = METHOD_NAME_ZLIB;
}
}
file.Method = s;
}
}
}
file.INode_Defined = ParseUInt64(item, "inode", file.INode);
file.UserId_Defined = ParseUInt64(item, "uid", file.UserId);
file.GroupId_Defined = ParseUInt64(item, "gid", file.GroupId);
// file.Device_Defined = ParseUInt64(item, "deviceno", file.Device);
file.MTime = ParseTime(item, "mtime"); // z_IsRequied = true
file.CTime = ParseTime(item, "ctime");
file.ATime = ParseTime(item, "atime");
{
const AString s (item.GetSubStringForTag("mode"));
if (s[0] == '0')
{
const char *end;
file.Mode = ConvertOctStringToUInt32(s, &end);
file.Mode_Defined = (*end == 0);
}
}
file.User = item.GetSubStringForTag("user");
file.Group = item.GetSubStringForTag("group");
files.Add(file);
}
FOR_VECTOR (i, item.SubItems)
if (!AddItem(item.SubItems[i], files, parent, level + 1))
return false;
return true;
}
struct CInStreamWithHash
{
CMyComPtr2_Create<ISequentialInStream, CInStreamWithSha1> inStreamSha1;
CMyComPtr2_Create<ISequentialInStream, CInStreamWithSha256> inStreamSha256;
CMyComPtr2_Create<ISequentialInStream, CLimitedSequentialInStream> inStreamLim;
void SetStreamAndInit(ISequentialInStream *stream, int algo);
bool CheckHash(int algo, const Byte *digest_from_arc) const;
};
void CInStreamWithHash::SetStreamAndInit(ISequentialInStream *stream, int algo)
{
if (algo == XAR_CKSUM_SHA1)
{
inStreamSha1->SetStream(stream);
inStreamSha1->Init();
stream = inStreamSha1;
}
else if (algo == XAR_CKSUM_SHA256
|| algo == XAR_CKSUM_SHA512)
{
inStreamSha256->SetStream(stream);
inStreamSha256->Init(algo == XAR_CKSUM_SHA512);
stream = inStreamSha256;
}
inStreamLim->SetStream(stream);
}
bool CInStreamWithHash::CheckHash(int algo, const Byte *digest_from_arc) const
{
if (algo == XAR_CKSUM_SHA1)
{
Byte digest[SHA1_DIGEST_SIZE];
inStreamSha1->Final(digest);
if (memcmp(digest, digest_from_arc, sizeof(digest)) != 0)
return false;
}
else if (algo == XAR_CKSUM_SHA256)
{
Byte digest[SHA256_DIGEST_SIZE];
inStreamSha256->Final256(digest);
if (memcmp(digest, digest_from_arc, sizeof(digest)) != 0)
return false;
}
else if (algo == XAR_CKSUM_SHA512)
{
Byte digest[SHA512_DIGEST_SIZE];
inStreamSha256->Final512(digest);
if (memcmp(digest, digest_from_arc, sizeof(digest)) != 0)
return false;
}
return true;
}
HRESULT CHandler::Open2(IInStream *stream)
{
const unsigned kHeaderSize = 28;
UInt32 buf32[kHeaderSize / sizeof(UInt32)];
RINOK(ReadStream_FALSE(stream, buf32, kHeaderSize))
const unsigned headerSize = Get16((const Byte *)(const void *)buf32 + 4);
// xar library now writes 1 to version field.
// some old xars could have version == 0 ?
// specification allows (headerSize != 28),
// but we don't expect big value in (headerSize).
// so we restrict (headerSize) with 64 bytes to reduce false open.
const unsigned kHeaderSize_MAX = 64;
if (Get32(buf32) != 0x78617221 // signature: "xar!"
|| headerSize < kHeaderSize
|| headerSize > kHeaderSize_MAX
|| Get16((const Byte *)(const void *)buf32 + 6) > 1 // version
)
return S_FALSE;
_checkSumAlgo = Get32(buf32 + 6);
const UInt64 packSize = Get64(buf32 + 2);
const UInt64 unpackSize = Get64(buf32 + 4);
if (packSize >= kXmlPackSizeMax ||
unpackSize >= kXmlSizeMax)
return S_FALSE;
/* some xar archives can have padding bytes at offset 28,
or checksum algorithm name at offset 28 (in xar fork, if cksum_alg==3)
But we didn't see such xar archives.
*/
if (headerSize != kHeaderSize)
{
RINOK(InStream_SeekSet(stream, headerSize))
}
_dataStartPos = headerSize + packSize;
_phySize = _dataStartPos;
_xmlBuf.Alloc((size_t)unpackSize + 1);
if (!_xmlBuf.IsAllocated())
return E_OUTOFMEMORY;
_xmlLen = (size_t)unpackSize;
CInStreamWithHash hashStream;
{
CMyComPtr2_Create<ICompressCoder, NCompress::NZlib::CDecoder> zlibCoder;
hashStream.SetStreamAndInit(stream, (int)(unsigned)_checkSumAlgo);
hashStream.inStreamLim->Init(packSize);
CMyComPtr2_Create<ISequentialOutStream, CBufPtrSeqOutStream> outStreamLim;
outStreamLim->Init(_xmlBuf, (size_t)unpackSize);
RINOK(zlibCoder.Interface()->Code(hashStream.inStreamLim, outStreamLim, NULL, &unpackSize, NULL))
if (outStreamLim->GetPos() != (size_t)unpackSize)
return S_FALSE;
}
_xmlBuf[(size_t)unpackSize] = 0;
if (strlen((const char *)(const Byte *)_xmlBuf) != (size_t)unpackSize)
return S_FALSE;
CXml xml;
if (!xml.Parse((const char *)(const Byte *)_xmlBuf))
return S_FALSE;
if (!xml.Root.IsTagged("xar") || xml.Root.SubItems.Size() != 1)
return S_FALSE;
const CXmlItem &toc = xml.Root.SubItems[0];
if (!toc.IsTagged("toc"))
return S_FALSE;
// CreationTime = ParseTime(toc, "creation-time", false); // z_IsRequied
CreationTime_String = toc.GetSubStringForTag("creation-time");
{
// we suppose that offset of checksum is always 0;
// but [TOC].xml contains exact offset value in <checksum> block.
const UInt64 offset = 0;
const unsigned hashSize = GetHashSize((int)(unsigned)_checkSumAlgo);
if (hashSize)
{
/*
const CXmlItem *csItem = toc.FindSubTag_GetPtr("checksum");
if (csItem)
{
const int checkSumAlgo2 = Find_ChecksumId_for_Name(csItem->GetPropVal("style"));
UInt64 csSize, csOffset;
if (ParseUInt64(*csItem, "size", csSize) &&
ParseUInt64(*csItem, "offset", csOffset) &&
csSize == hashSize &&
(unsigned)checkSumAlgo2 == _checkSumAlgo)
offset = csOffset;
}
*/
CByteBuffer digest_from_arc(hashSize);
RINOK(InStream_SeekSet(stream, _dataStartPos + offset))
RINOK(ReadStream_FALSE(stream, digest_from_arc, hashSize))
if (!hashStream.CheckHash((int)(unsigned)_checkSumAlgo, digest_from_arc))
_toc_CrcError = true;
}
}
if (!AddItem(toc, _files,
-1, // parent
0)) // level
return S_FALSE;
UInt64 totalPackSize = 0;
unsigned numMainFiles = 0;
FOR_VECTOR (i, _files)
{
const CFile &file = _files[i];
file.UpdateTotalPackSize(totalPackSize);
if (file.Parent == -1)
{
if (file.Name.IsEqualTo("Payload") ||
file.Name.IsEqualTo("Content"))
{
_mainSubfile = (Int32)(int)i;
numMainFiles++;
}
else if (file.Name.IsEqualTo("PackageInfo"))
_is_pkg = true;
}
}
if (numMainFiles > 1)
_mainSubfile = -1;
const UInt64 k_PhySizeLim = (UInt64)1 << 62;
_phySize = (totalPackSize > k_PhySizeLim - _dataStartPos) ?
k_PhySizeLim :
_dataStartPos + totalPackSize;
return S_OK;
}
Z7_COM7F_IMF(CHandler::Open(IInStream *stream,
const UInt64 * /* maxCheckStartPosition */,
IArchiveOpenCallback * /* openArchiveCallback */))
{
COM_TRY_BEGIN
{
Close();
RINOK(Open2(stream))
_inStream = stream;
}
return S_OK;
COM_TRY_END
}
Z7_COM7F_IMF(CHandler::Close())
{
_phySize = 0;
_dataStartPos = 0;
_inStream.Release();
_files.Clear();
_xmlLen = 0;
_xmlBuf.Free();
_mainSubfile = -1;
_is_pkg = false;
_toc_CrcError = false;
_checkSumAlgo = 0;
// CreationTime = 0;
CreationTime_String.Empty();
return S_OK;
}
Z7_COM7F_IMF(CHandler::GetNumberOfItems(UInt32 *numItems))
{
*numItems = _files.Size()
#ifdef XAR_SHOW_RAW
+ 1
#endif
;
return S_OK;
}
static void TimeToProp(UInt64 t, NCOM::CPropVariant &prop)
{
if (t != 0)
{
FILETIME ft;
ft.dwLowDateTime = (UInt32)(t);
ft.dwHighDateTime = (UInt32)(t >> 32);
prop = ft;
}
}
static void Utf8StringToProp(const AString &s, NCOM::CPropVariant &prop)
{
if (!s.IsEmpty())
{
UString us;
ConvertUTF8ToUnicode(s, us);
prop = us;
}
}
Z7_COM7F_IMF(CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value))
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
switch (propID)
{
// case kpidHeadersSize: prop = _dataStartPos; break;
case kpidPhySize: prop = _phySize; break;
case kpidMainSubfile: if (_mainSubfile >= 0) prop = (UInt32)_mainSubfile; break;
case kpidSubType: if (_is_pkg) prop = "pkg"; break;
case kpidExtension: prop = _is_pkg ? "pkg" : "xar"; break;
case kpidCTime:
{
// it's local time. We can transfer it to UTC time, if we use FILETIME.
// TimeToProp(CreationTime, prop); break;
if (!CreationTime_String.IsEmpty())
prop = CreationTime_String;
break;
}
case kpidMethod:
{
AString s;
if (_checkSumAlgo < Z7_ARRAY_SIZE(k_ChecksumNames))
s = k_ChecksumNames[_checkSumAlgo];
else
{
s += "Checksum";
s.Add_UInt32(_checkSumAlgo);
}
prop = s;
break;
}
case kpidWarningFlags:
{
UInt32 v = 0;
if (_toc_CrcError) v |= kpv_ErrorFlags_CrcError;
prop = v;
break;
}
case kpidINode: prop = true; break;
case kpidIsTree: prop = true; break;
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
/*
inline UInt32 MY_dev_major(UInt64 dev)
{
return ((UInt32)(dev >> 8) & (UInt32)0xfff) | ((UInt32)(dev >> 32) & ~(UInt32)0xfff);
}
inline UInt32 MY_dev_minor(UInt64 dev)
{
return ((UInt32)(dev) & 0xff) | ((UInt32)(dev >> 12) & ~(UInt32)0xff);
}
*/
Z7_COM7F_IMF(CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value))
{
COM_TRY_BEGIN
NCOM::CPropVariant prop;
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
{
switch (propID)
{
case kpidName:
case kpidPath:
prop = "[TOC].xml"; break;
case kpidSize:
case kpidPackSize: prop = (UInt64)_xmlLen; break;
}
}
else
#endif
{
const CFile &item = _files[index];
switch (propID)
{
case kpidPath:
{
AString path;
unsigned cur = index;
for (;;)
{
const CFile &item2 = _files[cur];
if (!path.IsEmpty())
path.InsertAtFront(CHAR_PATH_SEPARATOR);
// #define XAR_EMPTY_NAME_REPLACEMENT "[]"
if (item2.Name.IsEmpty())
{
AString s('[');
s.Add_UInt32(cur);
s.Add_Char(']');
path.Insert(0, s);
}
else
path.Insert(0, item2.Name);
if (item2.Parent < 0)
break;
cur = (unsigned)item2.Parent;
}
Utf8StringToProp(path, prop);
break;
}
case kpidName:
{
if (item.Name.IsEmpty())
{
AString s('[');
s.Add_UInt32(index);
s.Add_Char(']');
prop = s;
}
else
Utf8StringToProp(item.Name, prop);
break;
}
case kpidIsDir: prop = item.IsDir; break;
case kpidSize: if (item.HasData && !item.IsDir) prop = item.Size; break;
case kpidPackSize: if (item.HasData && !item.IsDir) prop = item.PackSize; break;
case kpidMethod:
{
if (item.HasData)
{
AString s = item.Method;
item.extracted_checksum.AddNameToString(s);
item.archived_checksum.AddNameToString(s);
Utf8StringToProp(s, prop);
}
break;
}
case kpidMTime: TimeToProp(item.MTime, prop); break;
case kpidCTime: TimeToProp(item.CTime, prop); break;
case kpidATime: TimeToProp(item.ATime, prop); break;
case kpidPosixAttrib:
if (item.Mode_Defined)
{
UInt32 mode = item.Mode;
if ((mode & MY_LIN_S_IFMT) == 0)
mode |= (
item.Is_SymLink ? MY_LIN_S_IFLNK :
item.IsDir ? MY_LIN_S_IFDIR :
MY_LIN_S_IFREG);
prop = mode;
}
break;
case kpidType: Utf8StringToProp(item.Type, prop); break;
case kpidUser: Utf8StringToProp(item.User, prop); break;
case kpidGroup: Utf8StringToProp(item.Group, prop); break;
case kpidSymLink: if (item.Is_SymLink) Utf8StringToProp(item.Link, prop); break;
case kpidUserId: if (item.UserId_Defined) prop = item.UserId; break;
case kpidGroupId: if (item.GroupId_Defined) prop = item.GroupId; break;
case kpidINode: if (item.INode_Defined) prop = item.INode; break;
case kpidId: if (item.Id_Defined) prop = item.Id; break;
// Utf8StringToProp(item.Id, prop);
/*
case kpidDeviceMajor: if (item.Device_Defined) prop = (UInt32)MY_dev_major(item.Device); break;
case kpidDeviceMinor: if (item.Device_Defined) prop = (UInt32)MY_dev_minor(item.Device); break;
case kpidLinkType:
if (!item.LinkType.IsEmpty())
Utf8StringToProp(item.LinkType, prop);
break;
case kpidLinkFrom:
if (!item.LinkFrom.IsEmpty())
Utf8StringToProp(item.LinkFrom, prop);
break;
*/
case kpidOffset:
if (item.HasData)
prop = _dataStartPos + item.Offset;
break;
}
}
prop.Detach(value);
return S_OK;
COM_TRY_END
}
// for debug:
// #define Z7_XAR_SHOW_CHECKSUM_PACK
#ifdef Z7_XAR_SHOW_CHECKSUM_PACK
enum
{
kpidChecksumPack = kpidUserDefined
};
#endif
static const Byte kRawProps[] =
{
kpidChecksum
#ifdef Z7_XAR_SHOW_CHECKSUM_PACK
, kpidCRC // instead of kpidUserDefined / kpidCRC
#endif
};
Z7_COM7F_IMF(CHandler::GetNumRawProps(UInt32 *numProps))
{
*numProps = Z7_ARRAY_SIZE(kRawProps);
return S_OK;
}
Z7_COM7F_IMF(CHandler::GetRawPropInfo(UInt32 index, BSTR *name, PROPID *propID))
{
*propID = kRawProps[index];
*name = NULL;
#ifdef Z7_XAR_SHOW_CHECKSUM_PACK
if (index != 0)
{
*propID = kpidChecksumPack;
*name = NWindows::NCOM::AllocBstrFromAscii("archived-checksum");
}
#endif
return S_OK;
}
Z7_COM7F_IMF(CHandler::GetParent(UInt32 index, UInt32 *parent, UInt32 *parentType))
{
*parentType = NParentType::kDir;
*parent = (UInt32)(Int32)-1;
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
return S_OK;
#endif
{
const CFile &item = _files[index];
*parent = (UInt32)(Int32)item.Parent;
}
return S_OK;
}
Z7_COM7F_IMF(CHandler::GetRawProp(UInt32 index, PROPID propID, const void **data, UInt32 *dataSize, UInt32 *propType))
{
*data = NULL;
*dataSize = 0;
*propType = 0;
// COM_TRY_BEGIN
NCOM::CPropVariant prop;
if (propID == kpidChecksum)
{
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
{
// case kpidPath: prop = "[TOC].xml"; break;
}
else
#endif
{
const CFile &item = _files[index];
const size_t size = item.extracted_checksum.Data.Size();
if (size != 0)
{
*dataSize = (UInt32)size;
*propType = NPropDataType::kRaw;
*data = item.extracted_checksum.Data;
}
}
}
#ifdef Z7_XAR_SHOW_CHECKSUM_PACK
if (propID == kpidChecksumPack)
{
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
{
// we can show digest check sum here
}
else
#endif
{
const CFile &item = _files[index];
const size_t size = (UInt32)item.archived_checksum.Data.Size();
if (size != 0)
{
*dataSize = (UInt32)size;
*propType = NPropDataType::kRaw;
*data = item.archived_checksum.Data;
}
}
}
#endif
return S_OK;
}
Z7_COM7F_IMF(CHandler::Extract(const UInt32 *indices, UInt32 numItems,
Int32 testMode, IArchiveExtractCallback *extractCallback))
{
COM_TRY_BEGIN
const bool allFilesMode = (numItems == (UInt32)(Int32)-1);
if (allFilesMode)
numItems = _files.Size()
#ifdef XAR_SHOW_RAW
+ 1
#endif
;
if (numItems == 0)
return S_OK;
UInt64 totalSize = 0;
UInt32 i;
for (i = 0; i < numItems; i++)
{
const UInt32 index = allFilesMode ? i : indices[i];
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
totalSize += _xmlLen;
else
#endif
totalSize += _files[index].Size;
}
RINOK(extractCallback->SetTotal(totalSize))
CMyComPtr2_Create<ICompressProgressInfo, CLocalProgress> lps;
lps->Init(extractCallback, false);
CInStreamWithHash inHashStream;
CMyComPtr2_Create<ISequentialOutStream, COutStreamWithSha1> outStreamSha1;
CMyComPtr2_Create<ISequentialOutStream, COutStreamWithSha256> outStreamSha256;
CMyComPtr2_Create<ISequentialOutStream, CLimitedSequentialOutStream> outStreamLim;
CMyComPtr2_Create<ICompressCoder, NCompress::CCopyCoder> copyCoder;
CMyComPtr2_Create<ICompressCoder, NCompress::NZlib::CDecoder> zlibCoder;
CMyComPtr2_Create<ICompressCoder, NCompress::NBZip2::CDecoder> bzip2Coder;
bzip2Coder->FinishMode = true;
UInt64 cur_PackSize, cur_UnpSize;
for (i = 0;; i++,
lps->InSize += cur_PackSize,
lps->OutSize += cur_UnpSize)
{
cur_PackSize = 0;
cur_UnpSize = 0;
RINOK(lps->SetCur())
if (i >= numItems)
break;
CMyComPtr<ISequentialOutStream> realOutStream;
const Int32 askMode = testMode ?
NExtract::NAskMode::kTest :
NExtract::NAskMode::kExtract;
const UInt32 index = allFilesMode ? i : indices[i];
RINOK(extractCallback->GetStream(index, &realOutStream, askMode))
if (index < _files.Size())
{
const CFile &item = _files[index];
if (item.IsDir)
{
RINOK(extractCallback->PrepareOperation(askMode))
realOutStream.Release();
RINOK(extractCallback->SetOperationResult(NExtract::NOperationResult::kOK))
continue;
}
}
if (!testMode && !realOutStream)
continue;
RINOK(extractCallback->PrepareOperation(askMode))
Int32 opRes = NExtract::NOperationResult::kOK;
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
{
cur_PackSize = cur_UnpSize = _xmlLen;
if (realOutStream)
RINOK(WriteStream(realOutStream, _xmlBuf, _xmlLen))
realOutStream.Release();
}
else
#endif
{
const CFile &item = _files[index];
if (!item.HasData)
realOutStream.Release();
else
{
cur_PackSize = item.PackSize;
cur_UnpSize = item.Size;
RINOK(InStream_SeekSet(_inStream, _dataStartPos + item.Offset))
inHashStream.SetStreamAndInit(_inStream, item.archived_checksum.AlgoNumber);
inHashStream.inStreamLim->Init(item.PackSize);
const int checksum_method = item.extracted_checksum.AlgoNumber;
if (checksum_method == XAR_CKSUM_SHA1)
{
outStreamLim->SetStream(outStreamSha1);
outStreamSha1->SetStream(realOutStream);
outStreamSha1->Init();
}
else if (checksum_method == XAR_CKSUM_SHA256
|| checksum_method == XAR_CKSUM_SHA512)
{
outStreamLim->SetStream(outStreamSha256);
outStreamSha256->SetStream(realOutStream);
outStreamSha256->Init(checksum_method == XAR_CKSUM_SHA512);
}
else
outStreamLim->SetStream(realOutStream);
realOutStream.Release();
// outStreamSha1->Init(item.Sha1IsDefined);
outStreamLim->Init(item.Size);
HRESULT res = S_OK;
ICompressCoder *coder = NULL;
if (item.IsCopyMethod())
{
if (item.PackSize == item.Size)
coder = copyCoder;
else
opRes = NExtract::NOperationResult::kUnsupportedMethod;
}
else if (item.Method.IsEqualTo(METHOD_NAME_ZLIB))
coder = zlibCoder;
else if (item.Method.IsEqualTo("bzip2"))
coder = bzip2Coder;
else
opRes = NExtract::NOperationResult::kUnsupportedMethod;
if (coder)
res = coder->Code(inHashStream.inStreamLim, outStreamLim, NULL, &item.Size, lps);
if (res != S_OK)
{
if (!outStreamLim->IsFinishedOK())
opRes = NExtract::NOperationResult::kDataError;
else if (res != S_FALSE)
return res;
if (opRes == NExtract::NOperationResult::kOK)
opRes = NExtract::NOperationResult::kDataError;
}
if (opRes == NExtract::NOperationResult::kOK)
{
if (outStreamLim->IsFinishedOK())
{
if (checksum_method == XAR_CKSUM_SHA1)
{
Byte digest[SHA1_DIGEST_SIZE];
outStreamSha1->Final(digest);
if (memcmp(digest, item.extracted_checksum.Data, SHA1_DIGEST_SIZE) != 0)
opRes = NExtract::NOperationResult::kCRCError;
}
else if (checksum_method == XAR_CKSUM_SHA256)
{
Byte digest[SHA256_DIGEST_SIZE];
outStreamSha256->Final256(digest);
if (memcmp(digest, item.extracted_checksum.Data, sizeof(digest)) != 0)
opRes = NExtract::NOperationResult::kCRCError;
}
else if (checksum_method == XAR_CKSUM_SHA512)
{
Byte digest[SHA512_DIGEST_SIZE];
outStreamSha256->Final512(digest);
if (memcmp(digest, item.extracted_checksum.Data, sizeof(digest)) != 0)
opRes = NExtract::NOperationResult::kCRCError;
}
if (opRes == NExtract::NOperationResult::kOK)
if (!inHashStream.CheckHash(
item.archived_checksum.AlgoNumber,
item.archived_checksum.Data))
opRes = NExtract::NOperationResult::kCRCError;
}
else
opRes = NExtract::NOperationResult::kDataError;
}
if (checksum_method == XAR_CKSUM_SHA1)
outStreamSha1->ReleaseStream();
else if (checksum_method == XAR_CKSUM_SHA256)
outStreamSha256->ReleaseStream();
}
outStreamLim->ReleaseStream();
}
RINOK(extractCallback->SetOperationResult(opRes))
}
return S_OK;
COM_TRY_END
}
Z7_COM7F_IMF(CHandler::GetStream(UInt32 index, ISequentialInStream **stream))
{
*stream = NULL;
COM_TRY_BEGIN
#ifdef XAR_SHOW_RAW
if (index >= _files.Size())
{
Create_BufInStream_WithNewBuffer(_xmlBuf, _xmlLen, stream);
return S_OK;
}
else
#endif
{
const CFile &item = _files[index];
if (item.HasData && item.IsCopyMethod() && item.PackSize == item.Size)
return CreateLimitedInStream(_inStream, _dataStartPos + item.Offset, item.Size, stream);
}
return S_FALSE;
COM_TRY_END
}
// 0x1c == 28 is expected header size value for most archives.
// but we want to support another (rare case) headers sizes.
// so we must reduce signature to 4 or 5 bytes.
static const Byte k_Signature[] =
// { 'x', 'a', 'r', '!', 0, 0x1C, 0 };
{ 'x', 'a', 'r', '!', 0 };
REGISTER_ARC_I(
"Xar", "xar pkg xip", NULL, 0xE1,
k_Signature,
0,
0,
NULL)
}}
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