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
commit d074cc7c07
3848 changed files with 1076682 additions and 0 deletions
@@ -0,0 +1,643 @@
+// MbrHandler.cpp
+
+#include "StdAfx.h"
+
+// #define SHOW_DEBUG_INFO
+
+#ifdef SHOW_DEBUG_INFO
+#include <stdio.h>
+#endif
+
+#include "../../../C/CpuArch.h"
+
+#include "../../Common/ComTry.h"
+#include "../../Common/IntToString.h"
+#include "../../Common/MyBuffer.h"
+
+#include "../../Windows/PropVariant.h"
+
+#include "../Common/RegisterArc.h"
+#include "../Common/StreamUtils.h"
+
+#include "HandlerCont.h"
+
+#ifdef SHOW_DEBUG_INFO
+#define PRF(x) x
+#else
+#define PRF(x)
+#endif
+
+using namespace NWindows;
+
+namespace NArchive {
+
+namespace NFat {
+API_FUNC_IsArc IsArc_Fat(const Byte *p, size_t size);
+}
+
+namespace NMbr {
+
+struct CChs
+{
+  Byte Head;
+  Byte SectCyl;
+  Byte Cyl8;
+  
+  UInt32 GetSector() const { return SectCyl & 0x3F; }
+  UInt32 GetCyl() const { return ((UInt32)SectCyl >> 6 << 8) | Cyl8; }
+  void ToString(NCOM::CPropVariant &prop) const;
+
+  void Parse(const Byte *p)
+  {
+    Head = p[0];
+    SectCyl = p[1];
+    Cyl8 = p[2];
+  }
+  bool Check() const { return GetSector() > 0; }
+};
+
+
+// Chs in some MBRs contains only low bits of "Cyl number". So we disable check.
+/*
+#define RINOZ(x) { int _t_ = (x); if (_t_ != 0) return _t_; }
+static int CompareChs(const CChs &c1, const CChs &c2)
+{
+  RINOZ(MyCompare(c1.GetCyl(), c2.GetCyl()));
+  RINOZ(MyCompare(c1.Head, c2.Head));
+  return MyCompare(c1.GetSector(), c2.GetSector());
+}
+*/
+
+void CChs::ToString(NCOM::CPropVariant &prop) const
+{
+  AString s;
+  s.Add_UInt32(GetCyl());
+  s.Add_Minus();
+  s.Add_UInt32(Head);
+  s.Add_Minus();
+  s.Add_UInt32(GetSector());
+  prop = s;
+}
+
+struct CPartition
+{
+  Byte Status;
+  CChs BeginChs;
+  Byte Type;
+  CChs EndChs;
+  UInt32 Lba;
+  UInt32 NumBlocks;
+
+  CPartition() { memset (this, 0, sizeof(*this)); }
+  
+  bool IsEmpty() const { return Type == 0; }
+  bool IsExtended() const { return Type == 5 || Type == 0xF; }
+  UInt32 GetLimit() const { return Lba + NumBlocks; }
+  // bool IsActive() const { return Status == 0x80; }
+  UInt64 GetPos(unsigned sectorSizeLog) const { return (UInt64)Lba << sectorSizeLog; }
+  UInt64 GetSize(unsigned sectorSizeLog) const { return (UInt64)NumBlocks << sectorSizeLog; }
+
+  bool CheckLbaLimits() const { return (UInt32)0xFFFFFFFF - Lba >= NumBlocks; }
+  bool Parse(const Byte *p)
+  {
+    Status = p[0];
+    BeginChs.Parse(p + 1);
+    Type = p[4];
+    EndChs.Parse(p + 5);
+    Lba = GetUi32(p + 8);
+    NumBlocks = GetUi32(p + 12);
+    if (Type == 0)
+      return true;
+    if (Status != 0 && Status != 0x80)
+      return false;
+    return BeginChs.Check()
+       && EndChs.Check()
+       // && CompareChs(BeginChs, EndChs) <= 0
+       && NumBlocks > 0
+       && CheckLbaLimits();
+  }
+
+  #ifdef SHOW_DEBUG_INFO
+  void Print() const
+  {
+    NCOM::CPropVariant prop, prop2;
+    BeginChs.ToString(prop);
+    EndChs.ToString(prop2);
+    printf("   %2x %2x %8X %8X %12S %12S", (int)Status, (int)Type, Lba, NumBlocks, prop.bstrVal, prop2.bstrVal);
+  }
+  #endif
+};
+
+struct CPartType
+{
+  UInt32 Id;
+  const char *Ext;
+  const char *Name;
+};
+
+#define kFat "fat"
+
+/*
+if we use "format" command in Windows 10 for existing partition:
+  - if we format to ExFAT, it sets type=7
+  - if we format to UDF, it doesn't change type from previous value.
+*/
+  
+static const unsigned kType_Windows_NTFS = 7;
+
+static const CPartType kPartTypes[] =
+{
+  { 0x01, kFat, "FAT12" },
+  { 0x04, kFat, "FAT16 DOS 3.0+" },
+  { 0x05, NULL, "Extended" },
+  { 0x06, kFat, "FAT16 DOS 3.31+" },
+  { 0x07, "ntfs", "NTFS" },
+  { 0x0B, kFat, "FAT32" },
+  { 0x0C, kFat, "FAT32-LBA" },
+  { 0x0E, kFat, "FAT16-LBA" },
+  { 0x0F, NULL, "Extended-LBA" },
+  { 0x11, kFat, "FAT12-Hidden" },
+  { 0x14, kFat, "FAT16-Hidden < 32 MB" },
+  { 0x16, kFat, "FAT16-Hidden >= 32 MB" },
+  { 0x1B, kFat, "FAT32-Hidden" },
+  { 0x1C, kFat, "FAT32-LBA-Hidden" },
+  { 0x1E, kFat, "FAT16-LBA-WIN95-Hidden" },
+  { 0x27, "ntfs", "NTFS-WinRE" },
+  { 0x82, NULL, "Solaris x86 / Linux swap" },
+  { 0x83, NULL, "Linux" },
+  { 0x8E, "lvm", "Linux LVM" },
+  { 0xA5, NULL, "BSD slice" },
+  { 0xBE, NULL, "Solaris 8 boot" },
+  { 0xBF, NULL, "New Solaris x86" },
+  { 0xC2, NULL, "Linux-Hidden" },
+  { 0xC3, NULL, "Linux swap-Hidden" },
+  { 0xEE, NULL, "GPT" },
+  { 0xEE, NULL, "EFI" }
+};
+
+static int FindPartType(UInt32 type)
+{
+  for (unsigned i = 0; i < Z7_ARRAY_SIZE(kPartTypes); i++)
+    if (kPartTypes[i].Id == type)
+      return (int)i;
+  return -1;
+}
+
+struct CItem
+{
+  bool IsReal;
+  bool IsPrim;
+  bool WasParsed;
+  const char *FileSystem;
+  UInt64 Size;
+  CPartition Part;
+
+  CItem():
+      WasParsed(false),
+      FileSystem(NULL)
+      {}
+};
+
+
+Z7_class_CHandler_final: public CHandlerCont
+{
+  Z7_IFACE_COM7_IMP(IInArchive_Cont)
+
+  CObjectVector<CItem> _items;
+  UInt64 _totalSize;
+  CByteBuffer _buffer;
+
+  UInt32 _signature;
+  unsigned _sectorSizeLog;
+
+  virtual int GetItem_ExtractInfo(UInt32 index, UInt64 &pos, UInt64 &size) const Z7_override Z7_final
+  {
+    const CItem &item = _items[index];
+    pos = item.Part.GetPos(_sectorSizeLog);
+    size = item.Size;
+    return NExtract::NOperationResult::kOK;
+  }
+
+  HRESULT ReadTables(IInStream *stream, UInt32 baseLba, UInt32 lba, unsigned level);
+};
+
+/*
+static bool IsEmptyBuffer(const Byte *data, size_t size)
+{
+  for (unsigned i = 0; i < size; i++)
+    if (data[i] != 0)
+      return false;
+  return true;
+}
+*/
+
+const char *GetFileSystem(ISequentialInStream *stream, UInt64 partitionSize);
+
+HRESULT CHandler::ReadTables(IInStream *stream, UInt32 baseLba, UInt32 lba, unsigned level)
+{
+  if (level >= 128 || _items.Size() >= 128)
+    return S_FALSE;
+
+  const unsigned kNumHeaderParts = 4;
+  CPartition parts[kNumHeaderParts];
+
+  if (level == 0)
+    _sectorSizeLog = 9;
+  const UInt32 kSectorSize = (UInt32)1 << _sectorSizeLog;
+  UInt32 bufSize  = kSectorSize;
+  if (level == 0 && _totalSize >= (1 << 12))
+    bufSize = (1 << 12);
+  _buffer.Alloc(bufSize);
+  {
+    Byte *buf = _buffer;
+    const UInt64 newPos = (UInt64)lba << _sectorSizeLog;
+    if (newPos + bufSize > _totalSize)
+      return S_FALSE;
+    RINOK(InStream_SeekSet(stream, newPos))
+    RINOK(ReadStream_FALSE(stream, buf, bufSize))
+    if (buf[0x1FE] != 0x55 || buf[0x1FF] != 0xAA)
+      return S_FALSE;
+    if (level == 0)
+      _signature = GetUi32(buf + 0x1B8);
+    for (unsigned i = 0; i < kNumHeaderParts; i++)
+      if (!parts[i].Parse(buf + 0x1BE + 16 * i))
+        return S_FALSE;
+  }
+
+  // 23.02: now we try to detect 4kn format (4 KB sectors case)
+  if (level == 0)
+  // if (_totalSize >= (1 << 28)) // we don't expect small images with 4 KB sectors
+  if (bufSize >= (1 << 12))
+  {
+    UInt32 lastLim = 0;
+    UInt32 firstLba = 0;
+    UInt32 numBlocks = 0; // in first partition
+    for (unsigned i = 0; i < kNumHeaderParts; i++)
+    {
+      const CPartition &part = parts[i];
+      if (part.IsEmpty())
+        continue;
+      if (firstLba == 0 && part.NumBlocks != 0)
+      {
+        firstLba = part.Lba;
+        numBlocks = part.NumBlocks;
+      }
+      const UInt32 newLim = part.GetLimit();
+      if (newLim < lastLim)
+        return S_FALSE;
+      lastLim = newLim;
+    }
+    if (lastLim != 0)
+    {
+      const UInt64 lim12 = (UInt64)lastLim << 12;
+      if (lim12 <= _totalSize
+          // && _totalSize - lim12 < (1 << 28) // we can try to exclude false positive cases
+          )
+      // if (IsEmptyBuffer(&_buffer[(1 << 9)], (1 << 12) - (1 << 9)))
+      if (InStream_SeekSet(stream, (UInt64)firstLba << 12) == S_OK)
+      if (GetFileSystem(stream, (UInt64)numBlocks << 12))
+        _sectorSizeLog = 12;
+    }
+  }
+
+  PRF(printf("\n# %8X", lba));
+
+  UInt32 limLba = lba + 1;
+  if (limLba == 0)
+    return S_FALSE;
+
+  for (unsigned i = 0; i < kNumHeaderParts; i++)
+  {
+    CPartition &part = parts[i];
+    
+    if (part.IsEmpty())
+      continue;
+    PRF(printf("\n   %2d ", (unsigned)level));
+    #ifdef SHOW_DEBUG_INFO
+    part.Print();
+    #endif
+    
+    unsigned numItems = _items.Size();
+    UInt32 newLba = lba + part.Lba;
+    
+    if (part.IsExtended())
+    {
+      // if (part.Type == 5) // Check it!
+      newLba = baseLba + part.Lba;
+      if (newLba < limLba)
+        return S_FALSE;
+      const HRESULT res = ReadTables(stream, level < 1 ? newLba : baseLba, newLba, level + 1);
+      if (res != S_FALSE && res != S_OK)
+        return res;
+    }
+    if (newLba < limLba)
+      return S_FALSE;
+    part.Lba = newLba;
+    if (!part.CheckLbaLimits())
+      return S_FALSE;
+
+    CItem n;
+    n.Part = part;
+    bool addItem = false;
+    if (numItems == _items.Size())
+    {
+      n.IsPrim = (level == 0);
+      n.IsReal = true;
+      addItem = true;
+    }
+    else
+    {
+      const CItem &back = _items.Back();
+      const UInt32 backLimit = back.Part.GetLimit();
+      const UInt32 partLimit = part.GetLimit();
+      if (backLimit < partLimit)
+      {
+        n.IsReal = false;
+        n.Part.Lba = backLimit;
+        n.Part.NumBlocks = partLimit - backLimit;
+        addItem = true;
+      }
+    }
+    if (addItem)
+    {
+      if (n.Part.GetLimit() < limLba)
+        return S_FALSE;
+      limLba = n.Part.GetLimit();
+      n.Size = n.Part.GetSize(_sectorSizeLog);
+      _items.Add(n);
+    }
+  }
+  return S_OK;
+}
+
+
+static const Byte k_Ntfs_Signature[] = { 'N', 'T', 'F', 'S', ' ', ' ', ' ', ' ', 0 };
+
+static bool Is_Ntfs(const Byte *p)
+{
+  if (p[0x1FE] != 0x55 || p[0x1FF] != 0xAA)
+    return false;
+  switch (p[0])
+  {
+    case 0xE9: /* codeOffset = 3 + (Int16)Get16(p + 1); */ break;
+    case 0xEB: if (p[2] != 0x90) return false; /* codeOffset = 2 + (int)(signed char)p[1]; */ break;
+    default: return false;
+  }
+  return memcmp(p + 3, k_Ntfs_Signature, Z7_ARRAY_SIZE(k_Ntfs_Signature)) == 0;
+}
+
+static const Byte k_ExFat_Signature[] = { 'E', 'X', 'F', 'A', 'T', ' ', ' ', ' ' };
+
+static bool Is_ExFat(const Byte *p)
+{
+  if (p[0x1FE] != 0x55 || p[0x1FF] != 0xAA)
+    return false;
+  if (p[0] != 0xEB || p[1] != 0x76 || p[2] != 0x90)
+    return false;
+  return memcmp(p + 3, k_ExFat_Signature, Z7_ARRAY_SIZE(k_ExFat_Signature)) == 0;
+}
+
+static bool AllAreZeros(const Byte *p, size_t size)
+{
+  for (size_t i = 0; i < size; i++)
+    if (p[i] != 0)
+      return false;
+  return true;
+}
+
+static const UInt32 k_Udf_StartPos = 0x8000;
+static const Byte k_Udf_Signature[] = { 0, 'B', 'E', 'A', '0', '1', 1, 0 };
+
+static bool Is_Udf(const Byte *p)
+{
+  return memcmp(p + k_Udf_StartPos, k_Udf_Signature, sizeof(k_Udf_Signature)) == 0;
+}
+
+
+const char *GetFileSystem(ISequentialInStream *stream, UInt64 partitionSize)
+{
+  const size_t kHeaderSize = 1 << 9;
+  if (partitionSize >= kHeaderSize)
+  {
+    Byte buf[kHeaderSize];
+    if (ReadStream_FAIL(stream, buf, kHeaderSize) == S_OK)
+    {
+      // NTFS is expected default filesystem for (Type == 7)
+      if (Is_Ntfs(buf))
+        return "NTFS";
+      if (Is_ExFat(buf))
+        return "exFAT";
+      if (NFat::IsArc_Fat(buf, kHeaderSize))
+        return "FAT";
+      const size_t kHeaderSize2 = k_Udf_StartPos + (1 << 9);
+      if (partitionSize >= kHeaderSize2)
+      {
+        if (AllAreZeros(buf, kHeaderSize))
+        {
+          CByteBuffer buffer(kHeaderSize2);
+          // memcpy(buffer, buf, kHeaderSize);
+          if (ReadStream_FAIL(stream, buffer + kHeaderSize, kHeaderSize2 - kHeaderSize) == S_OK)
+            if (Is_Udf(buffer))
+              return "UDF";
+        }
+      }
+    }
+  }
+  return NULL;
+}
+
+
+Z7_COM7F_IMF(CHandler::Open(IInStream *stream,
+    const UInt64 * /* maxCheckStartPosition */,
+    IArchiveOpenCallback * /* openArchiveCallback */))
+{
+  COM_TRY_BEGIN
+  Close();
+  RINOK(InStream_GetSize_SeekToEnd(stream, _totalSize))
+  RINOK(ReadTables(stream, 0, 0, 0))
+  if (_items.IsEmpty())
+    return S_FALSE;
+  {
+    const UInt32 lbaLimit = _items.Back().Part.GetLimit();
+    const UInt64 lim = (UInt64)lbaLimit << _sectorSizeLog;
+    if (lim < _totalSize)
+    {
+      CItem n;
+      n.Part.Lba = lbaLimit;
+      n.Size = _totalSize - lim;
+      n.IsReal = false;
+      _items.Add(n);
+    }
+  }
+
+  FOR_VECTOR (i, _items)
+  {
+    CItem &item = _items[i];
+    if (item.Part.Type != kType_Windows_NTFS)
+      continue;
+    if (InStream_SeekSet(stream, item.Part.GetPos(_sectorSizeLog)) != S_OK)
+      continue;
+    item.FileSystem = GetFileSystem(stream, item.Size);
+    item.WasParsed = true;
+  }
+
+  _stream = stream;
+  return S_OK;
+  COM_TRY_END
+}
+
+
+Z7_COM7F_IMF(CHandler::Close())
+{
+  _totalSize = 0;
+  _items.Clear();
+  _stream.Release();
+  return S_OK;
+}
+
+
+enum
+{
+  kpidPrimary = kpidUserDefined,
+  kpidBegChs,
+  kpidEndChs
+};
+
+static const CStatProp kProps[] =
+{
+  { NULL, kpidPath, VT_BSTR},
+  { NULL, kpidSize, VT_UI8},
+  { NULL, kpidFileSystem, VT_BSTR},
+  { NULL, kpidOffset, VT_UI8},
+  { "Primary", kpidPrimary, VT_BOOL},
+  { "Begin CHS", kpidBegChs, VT_BSTR},
+  { "End CHS", kpidEndChs, VT_BSTR}
+};
+
+static const Byte kArcProps[] =
+{
+  kpidSectorSize,
+  kpidId
+};
+
+IMP_IInArchive_Props_WITH_NAME
+IMP_IInArchive_ArcProps
+
+
+Z7_COM7F_IMF(CHandler::GetArchiveProperty(PROPID propID, PROPVARIANT *value))
+{
+  NCOM::CPropVariant prop;
+  switch (propID)
+  {
+    case kpidMainSubfile:
+    {
+      int mainIndex = -1;
+      FOR_VECTOR (i, _items)
+        if (_items[i].IsReal)
+        {
+          if (mainIndex >= 0)
+          {
+            mainIndex = -1;
+            break;
+          }
+          mainIndex = (int)i;
+        }
+      if (mainIndex >= 0)
+        prop = (UInt32)(Int32)mainIndex;
+      break;
+    }
+    case kpidPhySize: prop = _totalSize; break;
+    case kpidSectorSize: prop = (UInt32)((UInt32)1 << _sectorSizeLog); break;
+    case kpidId: prop = _signature; break;
+  }
+  prop.Detach(value);
+  return S_OK;
+}
+
+Z7_COM7F_IMF(CHandler::GetNumberOfItems(UInt32 *numItems))
+{
+  *numItems = _items.Size();
+  return S_OK;
+}
+
+Z7_COM7F_IMF(CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *value))
+{
+  COM_TRY_BEGIN
+  NCOM::CPropVariant prop;
+
+  const CItem &item = _items[index];
+  const CPartition &part = item.Part;
+  switch (propID)
+  {
+    case kpidPath:
+    {
+      AString s;
+      s.Add_UInt32(index);
+      if (item.IsReal)
+      {
+        s.Add_Dot();
+        const char *ext = NULL;
+        if (item.FileSystem)
+        {
+          ext = "";
+          AString fs (item.FileSystem);
+          fs.MakeLower_Ascii();
+          s += fs;
+        }
+        else if (!item.WasParsed)
+        {
+          const int typeIndex = FindPartType(part.Type);
+          if (typeIndex >= 0)
+            ext = kPartTypes[(unsigned)typeIndex].Ext;
+        }
+        if (!ext)
+          ext = "img";
+        s += ext;
+      }
+      prop = s;
+      break;
+    }
+    case kpidFileSystem:
+      if (item.IsReal)
+      {
+        char s[32];
+        ConvertUInt32ToString(part.Type, s);
+        const char *res = s;
+        if (item.FileSystem)
+        {
+          // strcat(s, "-");
+          // strcpy(s, item.FileSystem);
+          res = item.FileSystem;
+        }
+        else if (!item.WasParsed)
+        {
+          const int typeIndex = FindPartType(part.Type);
+          if (typeIndex >= 0 && kPartTypes[(unsigned)typeIndex].Name)
+            res = kPartTypes[(unsigned)typeIndex].Name;
+        }
+        prop = res;
+      }
+      break;
+    case kpidSize:
+    case kpidPackSize: prop = item.Size; break;
+    case kpidOffset: prop = part.GetPos(_sectorSizeLog); break;
+    case kpidPrimary: if (item.IsReal) prop = item.IsPrim; break;
+    case kpidBegChs: if (item.IsReal) part.BeginChs.ToString(prop); break;
+    case kpidEndChs: if (item.IsReal) part.EndChs.ToString(prop); break;
+  }
+  prop.Detach(value);
+  return S_OK;
+  COM_TRY_END
+}
+
+
+  // 3, { 1, 1, 0 },
+  // 2, { 0x55, 0x1FF },
+
+REGISTER_ARC_I_NO_SIG(
+  "MBR", "mbr", NULL, 0xDB,
+  0,
+  NArcInfoFlags::kPureStartOpen,
+  NULL)
+
+}}