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FormatPE.hpp
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FormatPE.hpp
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#pragma once
/*
Copyright (c) 2020 Victor Sheinmann, [email protected]
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma warning(push)
#pragma warning(disable:4200) // Overflow in a key transformation is expected
#pragma warning(disable:4244)
#pragma warning(disable:4311) // Type cast (WinAPI compatibility)
#pragma warning(disable:4312) // Type cast (WinAPI compatibility)
#pragma warning(disable:4302) // Type cast (WinAPI compatibility)
#pragma warning(disable:4244) // Type cast (WinAPI compatibility)
struct NPEFMT
{
static const ULONG PLATMEMALIGN = 0x00001000;
static const ULONG PLATMEMALIGNMSK = ~(PLATMEMALIGN-1); // TODO: Move to 'platform.hpp'
//==============================================================================
//#define ALIGN_FORWARD(Value,Alignment) ((((Value)/(Alignment))+((bool)((Value)%(Alignment))))*(Alignment))
//#define ALIGN_BACKWARD(Value,Alignment) (((Value)/(Alignment))*(Alignment))
//---------------------------------------------------------------------------
static const ULONG SIGN_MZ = 0x5A4D;
static const ULONG SIGN_PE = 0x4550;
//---------------------------------------------------------------------------
static const ULONG SECTION_TYPE_DSECT = 0x00000001; // Reserved.
static const ULONG SECTION_TYPE_NOLOAD = 0x00000002; // Reserved.
static const ULONG SECTION_TYPE_GROUP = 0x00000004; // Reserved.
static const ULONG SECTION_TYPE_NO_PAD = 0x00000008; // Reserved.
static const ULONG SECTION_TYPE_COPY = 0x00000010; // Reserved.
static const ULONG SECTION_CNT_CODE = 0x00000020; // Section contains code.
static const ULONG SECTION_CNT_INITIALIZED_DATA = 0x00000040; // Section contains initialized data.
static const ULONG SECTION_CNT_UNINITIALIZED_DATA = 0x00000080; // Section contains uninitialized data.
static const ULONG SECTION_LNK_OTHER = 0x00000100; // Reserved.
static const ULONG SECTION_LNK_INFO = 0x00000200; // Section contains comments or some other type of information.
static const ULONG SECTION_TYPE_OVER = 0x00000400; // Reserved.
static const ULONG SECTION_LNK_REMOVE = 0x00000800; // Section contents will not become part of image.
static const ULONG SECTION_LNK_COMDAT = 0x00001000; // Section contents comdat.
static const ULONG SECTION_UNKNOW = 0x00002000; // Reserved.
static const ULONG SECTION_NO_DEFER_SPEC_EXC = 0x00004000; // Reset speculative exceptions handling bits in the TLB entries for this section.
static const ULONG SECTION_MEM_FARDATA = 0x00008000; // Section content can be accessed relative to GP
static const ULONG SECTION_MEM_SYSHEAP = 0x00010000; // Obsolete
static const ULONG SECTION_MEM_PURGEABLE = 0x00020000; //
static const ULONG SECTION_MEM_LOCKED = 0x00040000; //
static const ULONG SECTION_MEM_PRELOAD = 0x00080000; //
static const ULONG SECTION_ALIGN_1BYTES = 0x00100000; //
static const ULONG SECTION_ALIGN_2BYTES = 0x00200000; //
static const ULONG SECTION_ALIGN_4BYTES = 0x00300000; //
static const ULONG SECTION_ALIGN_8BYTES = 0x00400000; //
static const ULONG SECTION_ALIGN_16BYTES = 0x00500000; // Default alignment if no others are specified.
static const ULONG SECTION_ALIGN_32BYTES = 0x00600000; //
static const ULONG SECTION_ALIGN_64BYTES = 0x00700000; //
static const ULONG SECTION_ALIGN_128BYTES = 0x00800000; //
static const ULONG SECTION_ALIGN_256BYTES = 0x00900000; //
static const ULONG SECTION_ALIGN_512BYTES = 0x00A00000; //
static const ULONG SECTION_ALIGN_1024BYTES = 0x00B00000; //
static const ULONG SECTION_ALIGN_2048BYTES = 0x00C00000; //
static const ULONG SECTION_ALIGN_4096BYTES = 0x00D00000; //
static const ULONG SECTION_ALIGN_8192BYTES = 0x00E00000; //
static const ULONG SECTION_ALIGN_MASK = 0x00F00000; // UNUSED - Helps reading align value
static const ULONG SECTION_LNK_NRELOC_OVFL = 0x01000000; // Section contains extended relocations.
static const ULONG SECTION_MEM_DISCARDABLE = 0x02000000; // Section can be discarded.
static const ULONG SECTION_MEM_NOT_CACHED = 0x04000000; // Section is not cachable.
static const ULONG SECTION_MEM_NOT_PAGED = 0x08000000; // Section is not pageable.
static const ULONG SECTION_MEM_SHARED = 0x10000000; // Section is shareable.
static const ULONG SECTION_MEM_EXECUTE = 0x20000000; // Section is executable.
static const ULONG SECTION_MEM_READ = 0x40000000; // Section is readable.
static const ULONG SECTION_MEM_WRITE = 0x80000000; // Section is writeable.
typedef ULONGLONG PETYPE64;
typedef ULONG PETYPE32;
typedef ULONG_PTR PECURRENT;
#pragma pack( push, 1 )
//---------------------------------------------------------------------------
struct DOS_HEADER
{
WORD FlagMZ; // Magic number 0x00
WORD LastPageSize; // Bytes on last page of file 0x02
WORD PageCount; // Pages in file (Page = 512 bytes) 0x04
WORD RelocCount; // Elements count in Relocations table 0x06
WORD HeaderSize; // Size of header in paragraphs 0x08
WORD MinMemory; // Min. extra paragraphs needed 0x0A
WORD MaxMemory; // Max. extra paragraphs needed 0x0C
WORD ValueSS; // Initial SS value 0x0E
WORD ValueSP; // Initial SP value 0x10
WORD CheckSum; // Checksum of the file 0x12
WORD ValueIP; // Initial IP value 0x14
WORD ValueCS; // Initial CS value 0x16
WORD RelocTableOffset; // Address of relocation table 0x18
WORD OverlayNumber; // Overlay number (0 for main module) 0x1A
DWORD Compl20h; // Double paragraph align 0x1C
DWORD Reserved1; // Reserved words 0x20
WORD OemID; // OEM identifier 0x24
WORD OemInfo; // OEM information 0x26
BYTE Reserved2[20]; // Reserved bytes 0x28
DWORD OffsetHeaderPE; // File address of new exe header 0x3C
};
//---------------------------------------------------------------------------
struct DATA_DIRECTORY
{
DWORD DirectoryRVA; // RVA of the location of the directory. 0x00
DWORD DirectorySize; // Size of the directory. 0x04
};
//---------------------------------------------------------------------------
struct DATA_DIRECTORIES_TABLE
{
DATA_DIRECTORY ExportTable; // Export Directory 0x78
DATA_DIRECTORY ImportTable; // Import Directory 0x80
DATA_DIRECTORY ResourceTable; // Resource Directory 0x88
DATA_DIRECTORY ExceptionTable; // Exception Directory 0x90
DATA_DIRECTORY SecurityTable; // Security Directory 0x98
DATA_DIRECTORY FixUpTable; // Base Relocation Table 0xA0
DATA_DIRECTORY DebugTable; // Debug Directory 0xA8
DATA_DIRECTORY ImageDescription; // Description String 0xB0
DATA_DIRECTORY MachineSpecific; // Machine Value (MIPS GP) 0xB8
DATA_DIRECTORY TlsDirectory; // TLS Directory 0xC0
DATA_DIRECTORY LoadConfigDir; // Load Configuration Directory 0xC8
DATA_DIRECTORY BoundImportDir; // Bound(Delayed) Import Dir 0xD0
DATA_DIRECTORY ImportAddrTable; // Import Address Table 0xD8
DATA_DIRECTORY DelayImportDir; // 0xE0
DATA_DIRECTORY DotNetMetaDir; // .NET metadata directory 0xE8
DATA_DIRECTORY Reserved3; // Reserved (Must be NULL) 0xF0
};
//---------------------------------------------------------------------------
struct FILE_HEADER
{
WORD TypeCPU; // Machine((Alpha/Motorola/.../0x014C = I386) 0x04
WORD SectionsNumber; // Number of sections in the file 0x06
DWORD TimeDateStamp; // Number of seconds since Dec 31,1969,4:00PM 0x08
DWORD TablePtrCOFF; // Used in OBJ files and PE with debug info 0x0C
DWORD TableSizeCOFF; // The number of symbols in COFF table 0x10
WORD HeaderSizeNT; // Size of the OptionalHeader structure 0x14
WORD Flags; // 0000-Program; 0001-NoReloc; 0002-Can Exec; 0x16
}; // 0200-Address fixed; 2000-This DLL
//---------------------------------------------------------------------------
template<typename T> struct OPTIONAL_HEADER
{
WORD Magic; // 0107-ROM projection;010B-Normal projection 0x18
BYTE MajLinkerVer; // Linker version number 0x1A
BYTE MinLinkerVer; // Linker version number 0x1B
DWORD CodeSize; // Sum of sizes all code sections(ordinary one) 0x1C
DWORD InitDataSize; // Size of the initialized data 0x20
DWORD UnInitDataSize; // Size of the uninitialized data section (BSS) 0x24
DWORD EntryPointRVA; // Address of 1st instruction to be executed 0x28
DWORD BaseOfCode; // Address (RVA) of beginning of code section 0x2C
union
{
struct
{
DWORD BaseOfData; // Address (RVA) of beginning of data section 0x30
ULONG ImageBase; // The *preferred* load address of the file 0x34
};
ULONGLONG ImageBase64;
};
DWORD SectionAlign; // Alignment of sections when loaded into mem 0x38
DWORD FileAlign; // Align. of sections in file(mul of 512 bytes) 0x3C
WORD MajOperSysVer; // Version number of required OS 0x40
WORD MinOperSysVer; // Version number of required OS 0x42
WORD MajImageVer; // Version number of image 0x44
WORD MinImageVer; // Version number of image 0x46
WORD MajSubSysVer; // Version number of subsystem 0x48
WORD MinSubSysVer; // Version number of subsystem 0x4A
DWORD Win32Version; // Dunno! But I guess for future use. 0x4C
DWORD SizeOfImage; // Total size of the PE image in memory 0x50
DWORD SizeOfHeaders; // Size of all headers & section table 0x54
DWORD FileCheckSum; // Image file checksum 0x58
WORD SubSystem; // 1-NotNeeded;2-WinGUI;3-WinCON;5-OS2;7-Posix 0x5C
WORD FlagsDLL; // Used to indicate if a DLL image includes EPs 0x5E
T StackReserveSize;// Size of stack to reserve 0x60
T StackCommitSize; // Size of stack to commit 0x64 / 0x68
T HeapReserveSize; // Size of local heap space to reserve 0x68 / 0x70
T HeapCommitSize; // Size of local heap space to commit 0x6C / 0x78
DWORD LoaderFlags; // Choose Break/Debug/RunNormally(def) on load 0x70 / 0x80
DWORD NumOfSizesAndRVA;// Length of next DataDirectory array(alw10h) 0x74 / 0x84
DATA_DIRECTORIES_TABLE DataDirectories; // 0x78 / 0x88
};
//---------------------------------------------------------------------------
template<typename T> struct WIN_HEADER // Must be QWORD aligned
{
DWORD FlagPE; // PE File Signature 0x00
FILE_HEADER FileHeader; // File header 0x04
OPTIONAL_HEADER<T> OptionalHeader; // Optional file header 0x18
};
//---------------------------------------------------------------------------
struct EXPORT_DIR
{
DWORD Characteristics; // Reserved MUST BE NULL 0x00
DWORD TimeDateStamp; // Date of Creation 0x04
DWORD Version; // Export Version - Not Used 0x08
DWORD NameRVA; // RVA of Module Name 0x0C
DWORD OrdinalBase; // Base Number of Functions 0x10
DWORD FunctionsNumber; // Number of all exported functions 0x14
DWORD NamePointersNumber; // Number of functions names 0x18
DWORD AddressTableRVA; // RVA of Functions Address Table 0x1C
DWORD NamePointersRVA; // RVA of Functions Name Pointers Table 0x20
DWORD OrdinalTableRVA; // RVA of Functions Ordinals Table 0x24
};
//---------------------------------------------------------------------------
struct IMPORT_DESC
{
DWORD LookUpTabRVA; // 0x00
DWORD TimeDateStamp; // 0x04
DWORD ForwarderChain; // 0x08
DWORD ModuleNameRVA; // 0x0C
DWORD AddressTabRVA; // 0x10
};
//---------------------------------------------------------------------------
struct SECTION_HEADER
{
char SectionName[8]; // 00
DWORD VirtualSize; // 08
DWORD SectionRva; // 0C
DWORD PhysicalSize; // 10
DWORD PhysicalOffset; // 14
DWORD PtrToRelocations; // 18
DWORD PtrToLineNumbers; // 1C
WORD NumOfRelocations; // 20
WORD NumOfLineNumbers; // 22
DWORD Characteristics; // 24
};
//---------------------------------------------------------------------------
struct DEBUG_DIR
{
DWORD Characteristics;
DWORD TimeDateStamp;
WORD MajorVersion;
WORD MinorVersion;
DWORD Type;
DWORD SizeOfData;
DWORD AddressOfRawData;
DWORD PointerToRawData;
};
//---------------------------------------------------------------------------
/*struct RELOCATION_DESC // IMAGE_LINENUMBER ???????????????????????????????????????
{
union
{
DWORD VirtualAddress;
DWORD RelocCount; // Set to the real count when IMAGE_SCN_LNK_NRELOC_OVFL is set
};
DWORD SymbolTableIndex;
WORD Type;
}; */
//---------------------------------------------------------------------------
struct RELOCATION_DESC // Max for 4k page // There may be more than one such block on Relocaton Directory
{
DWORD BaseRVA;
DWORD BlkSize;
struct
{
WORD Offset : 12;
WORD Type : 4;
}Records[0];
UINT Count(void){return (this->BlkSize - sizeof(RELOCATION_DESC)) / sizeof(WORD);}
};
//---------------------------------------------------------------------------
struct RESOURCE_DIR_ENTRY // _IMAGE_RESOURCE_DIRECTORY_ENTRY
{
union
{
struct
{
DWORD NameOffset : 31;
DWORD NameIsString : 1;
};
DWORD Name;
WORD Id;
};
union
{
DWORD OffsetToData;
struct
{
DWORD OffsetToDirectory : 31;
DWORD DataIsDirectory : 1;
};
};
};
//---------------------------------------------------------------------------
struct RESOURCE_DIR
{
DWORD Characteristics;
DWORD TimeDateStamp;
WORD MajorVersion;
WORD MinorVersion;
WORD NumberOfNamedEntries;
WORD NumberOfIdEntries;
IMAGE_RESOURCE_DIRECTORY_ENTRY DirectoryEntries[]; // Difined in WINNT.H
};
//---------------------------------------------------------------------------
template<typename T> struct TLS_DIR
{
T StartAddressOfRawData;
T EndAddressOfRawData;
T AddressOfIndex; // PDWORD
T AddressOfCallBacks; // PIMAGE_TLS_CALLBACK *;
DWORD SizeOfZeroFill;
DWORD Characteristics;
};
//---------------------------------------------------------------------------
template<typename T> struct LOAD_CONFIG_DIR
{
DWORD Size;
DWORD TimeDateStamp;
WORD MajorVersion;
WORD MinorVersion;
DWORD GlobalFlagsClear;
DWORD GlobalFlagsSet;
DWORD CriticalSectionDefaultTimeout;
T DeCommitFreeBlockThreshold;
T DeCommitTotalFreeThreshold;
T LockPrefixTable;
T MaximumAllocationSize;
T VirtualMemoryThreshold;
T ProcessAffinityMask;
DWORD ProcessHeapFlags;
WORD CSDVersion;
WORD DependentLoadFlags;
T EditList;
T SecurityCookie;
T SEHandlerTable;
T SEHandlerCount;
T GuardCFCheckFunctionPointer;
T GuardCFDispatchFunctionPointer;
T GuardCFFunctionTable;
T GuardCFFunctionCount;
DWORD GuardFlags;
};
//---------------------------------------------------------------------------
struct VERSION_INFO // The only version info? // VS_VERSION_INFO
{
WORD Length;
WORD ValueLength;
WORD Type;
WCHAR Key[0]; // Zero terminated
// WORD Padding1[]; // To make Value aligned to DWORD
// VS_FIXEDFILEINFO Value;
// WORD Padding2[]; // To make Children aligned to DWORD
// WORD Children[];
};
//---------------------------------------------------------------------------
struct SImportByName
{
WORD Hint;
BYTE Name[1];
};
template<typename T> struct SImportThunk
{
T Value; // ForwarderString; Function; Ordinal; AddressOfData;
};
//---------------------------------------------------------------------------
struct SRichRec
{
WORD Ver; // MinVer
WORD PId; // Product Identifier
DWORD Cntr; // Counter of what?
};
#pragma pack( pop )
//---------------------------------------------------------------------------
static bool IsValidPEHeader(PVOID Header)
{
DOS_HEADER* DosHdr = (DOS_HEADER*)Header;
if((DosHdr->FlagMZ != SIGN_MZ))return false;
WIN_HEADER<PECURRENT>* WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)Header)[DosHdr->OffsetHeaderPE]);
if((WinHdr->FlagPE != SIGN_PE))return false;
return true;
}
//---------------------------------------------------------------------------
static bool IsValidPEHeaderBlk(PVOID Header, UINT Size)
{
if(Size < sizeof(DOS_HEADER))return false;
DOS_HEADER* DosHdr = (DOS_HEADER*)Header;
if((DosHdr->FlagMZ != SIGN_MZ))return false;
if(Size < (DosHdr->OffsetHeaderPE + sizeof(WIN_HEADER<PECURRENT>)))return false;
WIN_HEADER<PECURRENT>* WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)Header)[DosHdr->OffsetHeaderPE]);
if((WinHdr->FlagPE != SIGN_PE))return false;
return true;
}
//---------------------------------------------------------------------------
static bool IsValidExeFile(PVOID Header) // TODO: Use IsBadReadPtr or specify a memory range as argument to test WinHdr? // Leave IsBadReadPtr for now because in a mapped images not all segments readable
{
if(!IsValidPEHeader(Header))return false;
DOS_HEADER *DosHdr = (DOS_HEADER*)Header;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)Header)[DosHdr->OffsetHeaderPE]);
if(IsBadReadPtr(WinHdr,sizeof(*WinHdr)))return false;
return !(WinHdr->FileHeader.Flags & 0x2000); // IsDll flag
}
//---------------------------------------------------------------------------
static bool IsValidModuleX64(PVOID Header)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)Header;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)Header)[DosHdr->OffsetHeaderPE]);
return (WinHdr->OptionalHeader.Magic == 0x020B);
}
//---------------------------------------------------------------------------
static bool IsRvaInSection(SECTION_HEADER *Sec, UINT Rva)
{
if(Sec->SectionRva > Rva)return false;
if((Sec->SectionRva+Sec->VirtualSize) <= Rva)return false;
return true;
}
//---------------------------------------------------------------------------
static UINT GetPEImageSize(PVOID Header)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)Header;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)Header)[DosHdr->OffsetHeaderPE]);
return WinHdr->OptionalHeader.SizeOfImage;
}
//---------------------------------------------------------------------------
// NOTE: Assumed that section offsets is sequential!
static UINT SizeOfSections(PVOID ModuleBase, UINT MaxSecs=-1, bool IncludeHdr=true, bool RawSizes=false)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&((PBYTE)ModuleBase)[HdrLen];
UINT Base = 0;
UINT Size = 0;
UINT SMax = (MaxSecs > WinHdr->FileHeader.SectionsNumber)?WinHdr->FileHeader.SectionsNumber:MaxSecs;
for(UINT ctr=0;ctr < SMax;ctr++)
{
if(!Base)Base = RawSizes?(CurSec[ctr].PhysicalOffset):(CurSec[ctr].SectionRva);
Size += RawSizes?(AlignFrwd(CurSec[ctr].PhysicalSize, WinHdr->OptionalHeader.FileAlign)):(AlignFrwd(CurSec[ctr].VirtualSize, WinHdr->OptionalHeader.SectionAlign));
}
if(!Base)Base = RawSizes?WinHdr->OptionalHeader.SizeOfHeaders:(AlignFrwd(WinHdr->OptionalHeader.SizeOfHeaders, WinHdr->OptionalHeader.SectionAlign));
return Base + Size;
}
//---------------------------------------------------------------------------
static UINT RvaToFileOffset(PBYTE ModuleBase, UINT Rva)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&ModuleBase[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&ModuleBase[HdrLen];
for(int ctr = 0;ctr < WinHdr->FileHeader.SectionsNumber;ctr++,CurSec++)
{
if(!IsRvaInSection(CurSec, Rva))continue;
Rva -= CurSec->SectionRva;
if(Rva >= CurSec->PhysicalSize)return 0; // Not present in the file as physical
return (CurSec->PhysicalOffset + Rva);
}
return 0;
}
//---------------------------------------------------------------------------
template<typename T> static UINT TFileOffsetToRva(PBYTE ModuleBase, UINT Offset)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&ModuleBase[HdrLen];
for(int ctr = 0;ctr < WinHdr->FileHeader.SectionsNumber;ctr++,CurSec++)
{
if((Offset >= CurSec->PhysicalOffset)&&(Offset < (CurSec->PhysicalOffset+CurSec->PhysicalSize)))
{
return ((Offset-CurSec->PhysicalOffset)+CurSec->SectionRva);
}
}
return 0;
}
//---------------------------------------------------------------------------
static UINT FileOffsetToRvaConvert(PVOID ModuleBase, UINT Offset)
{
if(!IsValidPEHeader(ModuleBase))return 0;
if(IsValidModuleX64(ModuleBase))return TFileOffsetToRva<PETYPE64>((PBYTE)ModuleBase, Offset);
return TFileOffsetToRva<PETYPE32>((PBYTE)ModuleBase, Offset);
}
//---------------------------------------------------------------------------
static PWSTR FindVerValue(VERSION_INFO* RootBlk, PWSTR Name, UINT Type)
{
//if(RootBlk->ValueLength && ((Type == (UINT)-1)||(Type == RootBlk->Type)) && (lstrcmpW((PWSTR)&RootBlk->Key,Name)==0)return (PWSTR)&RootBlk->Key;
}
//---------------------------------------------------------------------------
// TODO: Make it correct for search by a name
// Name is more a Lng here
/*
int _pe_iterate_resources(
PE* pe,
PIMAGE_RESOURCE_DIRECTORY resource_dir,
uint8_t* rsrc_data,
int rsrc_tree_level,
int* type,
int* id,
int* language,
uint8_t* type_string,
uint8_t* name_string,
uint8_t* lang_string,
RESOURCE_CALLBACK_FUNC callback,
void* callback_data)
{
*/
template<typename T> static PVOID TGetResBodyRaw(PBYTE ModuleBase, PBYTE ResBase, RESOURCE_DIR* Resour, UINT RootID, PUINT ResIdx, PUINT Size, LPSTR* Name, IMAGE_RESOURCE_DATA_ENTRY** DEntr)
{
for(UINT ctr=0;ctr < Resour->NumberOfIdEntries;ctr++)
{
IMAGE_RESOURCE_DIRECTORY_ENTRY* entr = &Resour->DirectoryEntries[ctr];
if((RootID != (UINT)-1)&&((PBYTE)Resour == ResBase))
{
if(entr->Name & 0x80000000)continue; // Name instead of ID encountered in the Root
if(RootID != (UINT)entr->Name)continue;
}
if(entr->OffsetToData & 0x80000000)
{
RESOURCE_DIR* RDir = (RESOURCE_DIR*)&ResBase[entr->OffsetToData & ~0x80000000];
PVOID res = TGetResBodyRaw<T>(ModuleBase, ResBase, RDir, RootID, ResIdx, Size, Name, DEntr);
if(res)return res; // Found resource
}
else
{
if(ResIdx && *ResIdx){(*ResIdx)--; continue;}
LPSTR LNam = NULL;
if(entr->Name & 0x80000000) // Here it is a LangID only?
{
IMAGE_RESOURCE_DIRECTORY_STRING* str = (IMAGE_RESOURCE_DIRECTORY_STRING*)&ResBase[entr->Name & ~0x80000000];
LNam = (LPSTR)&str->NameString; // -2(WORD) is size of the string
}
else LNam = (LPSTR)entr->Name; // Type // x64 ????????????????????????????
if(*Name)
{
if(entr->Name & 0x80000000){if(!IsNamesEqual(LNam,*Name))continue;} // lstrcmp(LNam,*Name) != 0
else if(LNam != *Name)continue;
}
else *Name = LNam;
IMAGE_RESOURCE_DATA_ENTRY* Dentry = (IMAGE_RESOURCE_DATA_ENTRY*)&ResBase[entr->OffsetToData];
*Size = Dentry->Size;
if(DEntr)*DEntr = Dentry;
return &ModuleBase[RvaToFileOffset(ModuleBase,Dentry->OffsetToData)];
}
}
return NULL;
}
//---------------------------------------------------------------------------
template<typename T> static PVOID TGetResourceBodyRaw(PBYTE ModuleBase, UINT RootID, UINT ResIdx, PUINT Size, LPSTR* Name, IMAGE_RESOURCE_DATA_ENTRY** DEntr)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
DATA_DIRECTORY *ResDir = &WinHdr->OptionalHeader.DataDirectories.ResourceTable;
RESOURCE_DIR *Resour = (RESOURCE_DIR*)&ModuleBase[RvaToFileOffset(ModuleBase,ResDir->DirectoryRVA)];
return TGetResBodyRaw<T>(ModuleBase, (PBYTE)Resour, Resour, RootID, &ResIdx, Size, Name, DEntr);
}
//---------------------------------------------------------------------------
static PVOID GetResourceBodyRaw(PVOID ModuleBase, UINT RootID, UINT ResIdx, PUINT Size, LPSTR* Name, IMAGE_RESOURCE_DATA_ENTRY** DEntr=NULL)
{
if(!IsValidPEHeader(ModuleBase))return NULL;
if(IsValidModuleX64(ModuleBase))return TGetResourceBodyRaw<PETYPE64>((PBYTE)ModuleBase, RootID, ResIdx, Size, Name, DEntr);
return TGetResourceBodyRaw<PETYPE32>((PBYTE)ModuleBase, RootID, ResIdx, Size, Name, DEntr);
}
//---------------------------------------------------------------------------
/*template<typename T> static UINT GetEntryPointersForApiName(PSTRING ModuleName, PSTRING ApiName, PVOID ModuleBase, T* *EntryA, T* *EntryB)
{
if(!IsValidPEHeader(ModuleBase))return 1;
DBGMSG("ModuleName='%Z', ApiName='%Z', ModuleBase=%p",ModuleName,ApiName,ModuleBase);
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY *ImportDir = &WinHdr->OptionalHeader.DataDirectories.ImportTable;
if(!ImportDir->DirectoryRVA)return 1;
IMPORT_DESC *Import = (IMPORT_DESC*)&((PBYTE)ModuleBase)[RvaToFileOffset(ModuleBase,ImportDir->DirectoryRVA,NULL)];
for(UINT tctr=0;Import[tctr].AddressTabRVA;tctr++)
{
STRING CurModlName;
T* LTable = (Import[tctr].LookUpTabRVA )?((T*)&((PBYTE)ModuleBase)[RvaToFileOffset(ModuleBase,Import[tctr].LookUpTabRVA, NULL)]):(NULL);
T* ATable = (Import[tctr].AddressTabRVA)?((T*)&((PBYTE)ModuleBase)[RvaToFileOffset(ModuleBase,Import[tctr].AddressTabRVA,NULL)]):(NULL); // Will be converted to API addresses by loader
T* Table = (LTable)?(LTable):(ATable);
CurModlName.Buffer = (LPSTR)&((PBYTE)ModuleBase)[RvaToFileOffset(ModuleBase,Import[tctr].ModuleNameRVA,NULL)];
CurModlName.Length = strlen(CurModlName.Buffer);
CurModlName.MaximumLength = CurModlName.Length+sizeof(CHAR);
if(!RtlEqualString(&CurModlName,ModuleName,TRUE))continue;
DBGMSG("Module <%s>, LTable=%p, ATable=%p",CurModlName.Buffer,LTable,ATable);
for(UINT actr=0;Table[actr];actr++)
{
STRING CurProcName;
if((Table[actr] & 0xFFFF0000)==0x80000000)continue; // Skip imports by ordinal
CurProcName.Buffer = (Table[actr] > 103809024)?((LPSTR)(Table[actr]+2)):((LPSTR)&((PBYTE)ModuleBase)[RvaToFileOffset(ModuleBase,Table[actr]+2,NULL)]); // May be already address, not offset // 103809024 = Max offset
CurProcName.Length = strlen(CurProcName.Buffer);
CurProcName.MaximumLength = CurProcName.Length+sizeof(CHAR);
//DBGMSG("Proc <%s>",CurProcName.Buffer);
if(RtlEqualString(&CurProcName,ApiName,FALSE))
{
if(EntryA)*EntryA = (LTable)?(<able[actr]):(NULL);
if(EntryB)*EntryB = (ATable)?(&ATable[actr]):(NULL);
DBGMSG("Found Import: <%s> %s",CurModlName.Buffer,CurProcName.Buffer);
return 0;
}
}
}
return 1;
}*/
//---------------------------------------------------------------------------
template<typename T> static LPSTR TGetExpModuleName(PBYTE ModuleBase, bool Raw) // Not for EXE // TODO: Optional Pointer validation mode
{
DOS_HEADER* DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T>* WinHdr = (WIN_HEADER<T>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY* ExportDir = &WinHdr->OptionalHeader.DataDirectories.ExportTable;
if(!ExportDir->DirectoryRVA)return NULL;
EXPORT_DIR* Export = (EXPORT_DIR*)&((PBYTE)ModuleBase)[ExportDir->DirectoryRVA];
return (LPSTR)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Export->NameRVA)):(Export->NameRVA)];
}
//---------------------------------------------------------------------------
static LPSTR GetExpModuleName(PVOID ModuleBase, bool Raw)
{
if(IsValidModuleX64(ModuleBase))return TGetExpModuleName<PETYPE64>((PBYTE)ModuleBase, Raw);
return TGetExpModuleName<PETYPE32>((PBYTE)ModuleBase, Raw);
}
//---------------------------------------------------------------------------
static PVOID ModuleAddressToBase(PVOID Address) // Not all module sections may be present in memory (discarded)
{
PBYTE Base = (PBYTE)(((ULONG_PTR)Address) & ~0xFFF);
while(IsBadReadPtr(Base,sizeof(DOS_HEADER)) || !IsValidPEHeader(Base))Base -= 0x1000; // !MmIsAddressValid(Base) // Why not all pages of ntoskrnl.exe are available on x64?
DBGMSG("Found module base: %p", Base);
return Base;
}
//---------------------------------------------------------------------------
/*static PVOID GetSystemRoutineAddress(CHAR *ProcName)
{
UNICODE_STRING ustr;
WCHAR Name[256];
ustr.Buffer = (PWSTR)&Name;
ustr.Length = ustr.MaximumLength = 0;
for(int ctr=0;ProcName[ctr] && (ctr < ((sizeof(Name)/2)-1));ctr++){Name[ctr] = ProcName[ctr];ustr.Length = ++ustr.MaximumLength;}
ustr.Buffer[ustr.Length] = 0;
ustr.Length = ustr.MaximumLength = ustr.Length * 2;
return MmGetSystemRoutineAddress(&ustr);
} */
//---------------------------------------------------------------------------
static CHAR CharCaseUpper(CHAR Chr)
{
if((Chr > 0x60)&&(Chr < 0x7B))Chr -= 0x20;
return Chr;
}
//------------------------------------------------------------------------------
static BOOL IsCharsEqualIC(CHAR ChrA, CHAR ChrB)
{
return (CharCaseUpper(ChrA) == CharCaseUpper(ChrB));
}
//------------------------------------------------------------------------------
static BOOL IsSectionNamesEqual(CHAR *NameA, CHAR *NameB)
{
for(int ctr=0;ctr<8;ctr++)
{
if(!IsCharsEqualIC(NameA[ctr], NameB[ctr]))return FALSE;
if(!NameA[ctr])break; // Both are ZERO
}
return TRUE;
}
//------------------------------------------------------------------------------
static BOOL IsNamesEqual(CHAR *NameA, CHAR *NameB)
{
for(;;NameA++,NameB++)
{
if(*NameA != *NameB)return FALSE;
if(!*NameA)break;
}
return TRUE;
}
//------------------------------------------------------------------------------
static BOOL IsNamesEqualIC(CHAR *NameA, CHAR *NameB)
{
for(;;NameA++,NameB++)
{
if(!IsCharsEqualIC(*NameA, *NameB))return FALSE;
if(!*NameA)break;
}
return TRUE;
}
//------------------------------------------------------------------------------
static bool GetSectionForAddress(PVOID ModuleBase, PVOID Address, SECTION_HEADER **ResSec)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&((BYTE*)ModuleBase)[HdrLen];
for(UINT ctr = 0;ctr < WinHdr->FileHeader.SectionsNumber;ctr++,CurSec++)
{
if(((PBYTE)Address >= ((PBYTE)ModuleBase + CurSec->SectionRva)) && ((PBYTE)Address < ((PBYTE)ModuleBase + CurSec->SectionRva + CurSec->VirtualSize)))
{
if(ResSec)*ResSec = CurSec; // NULL for only a presense test
return true;
}
}
return false;
}
//---------------------------------------------------------------------------
static bool GetModuleSection(PVOID ModuleBase, char *SecName, SECTION_HEADER **ResSec)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE]; // Size of PE header structure(x32/x64) is not important here
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&((BYTE*)ModuleBase)[HdrLen];
for(UINT ctr = 0;ctr < WinHdr->FileHeader.SectionsNumber;ctr++,CurSec++)
{
if(((SIZE_T)SecName == ctr) || IsSectionNamesEqual((char*)&CurSec->SectionName, SecName))
{
if(ResSec)*ResSec = CurSec; // NULL for only a presense test
return true;
}
}
return false;
}
//---------------------------------------------------------------------------
static bool GetModuleSection(PVOID ModuleBase, UINT SecIdx, SECTION_HEADER **ResSec)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE]; // Size of PE header structure(x32/x64) is not important here
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&((BYTE*)ModuleBase)[HdrLen];
if(SecIdx >= WinHdr->FileHeader.SectionsNumber)return false;
if(ResSec)*ResSec = &CurSec[SecIdx];
return true;
}
//---------------------------------------------------------------------------
template<typename T> static UINT TCalcRawModuleSize(PVOID ModuleBase)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
UINT HdrLen = DosHdr->OffsetHeaderPE+WinHdr->FileHeader.HeaderSizeNT+sizeof(FILE_HEADER)+sizeof(DWORD);
SECTION_HEADER *CurSec = (SECTION_HEADER*)&((BYTE*)ModuleBase)[HdrLen];
if(!WinHdr->FileHeader.SectionsNumber)return WinHdr->OptionalHeader.SizeOfHeaders + WinHdr->OptionalHeader.CodeSize + WinHdr->OptionalHeader.InitDataSize + WinHdr->OptionalHeader.UnInitDataSize;
SECTION_HEADER *LstSec = CurSec;
for(UINT ctr = 0;ctr < WinHdr->FileHeader.SectionsNumber;ctr++,CurSec++)
{
if(CurSec->PhysicalOffset > LstSec->PhysicalOffset)LstSec = CurSec;
}
return LstSec->PhysicalOffset + LstSec->PhysicalSize;
}
//---------------------------------------------------------------------------
static bool GetModuleSizes(PBYTE ModuleBase, UINT* RawSize, UINT* VirSize)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&((PBYTE)ModuleBase)[DosHdr->OffsetHeaderPE];
if(VirSize)*VirSize = WinHdr->OptionalHeader.SizeOfImage;
if(RawSize)
{
if(IsValidModuleX64(ModuleBase))*RawSize = TCalcRawModuleSize<PETYPE64>(ModuleBase);
else *RawSize = TCalcRawModuleSize<PETYPE32>(ModuleBase);
}
return true;
}
//---------------------------------------------------------------------------
static PVOID GetLoadedModuleEntryPoint(PVOID ModuleBase)
{
if(!IsValidPEHeader(ModuleBase))return NULL;
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<PECURRENT> *WinHdr = (WIN_HEADER<PECURRENT>*)&(((BYTE*)ModuleBase)[DosHdr->OffsetHeaderPE]);
if(!WinHdr->OptionalHeader.EntryPointRVA)return NULL;
return &((PBYTE)ModuleBase)[WinHdr->OptionalHeader.EntryPointRVA];
}
//---------------------------------------------------------------------------
template<typename T> static UINT TGetModuleEntryOffset(PBYTE ModuleBase, bool Raw)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
if(!WinHdr->OptionalHeader.EntryPointRVA)return 0;
return (Raw)?(RvaToFileOffset(ModuleBase,WinHdr->OptionalHeader.EntryPointRVA)):(WinHdr->OptionalHeader.EntryPointRVA);
}
//---------------------------------------------------------------------------
static UINT GetModuleEntryOffset(PBYTE ModuleBase, bool Raw)
{
if(IsValidModuleX64(ModuleBase))return TGetModuleEntryOffset<PETYPE64>(ModuleBase, Raw);
return TGetModuleEntryOffset<PETYPE32>(ModuleBase, Raw);
}
//---------------------------------------------------------------------------
template<typename T> static LPSTR TFindImportTable(PBYTE ModuleBase, LPSTR LibName, SImportThunk<T>** LookUpRec, SImportThunk<T>** AddrRec, bool Raw)
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY *ImportDir = &WinHdr->OptionalHeader.DataDirectories.ImportTable;
if(!ImportDir->DirectoryRVA)return NULL;
IMPORT_DESC *Import = (IMPORT_DESC*)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,ImportDir->DirectoryRVA)):(ImportDir->DirectoryRVA)];
for(DWORD tctr=0;Import[tctr].AddressTabRVA;tctr++)
{
LPSTR ModName = (LPSTR)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].ModuleNameRVA)):(Import[tctr].ModuleNameRVA)];
if(LibName && !IsNamesEqualIC(ModName,LibName))continue; // Can search for a proc of any module
SImportThunk<T>* Table = (SImportThunk<T>*)&((BYTE*)ModuleBase)[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].LookUpTabRVA)):(Import[tctr].LookUpTabRVA)];
SImportThunk<T>* LtRVA = (SImportThunk<T>*)&((BYTE*)ModuleBase)[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].AddressTabRVA)):(Import[tctr].AddressTabRVA)];
if(AddrRec)*AddrRec = &LtRVA[tctr];
if(LookUpRec)*LookUpRec = &Table[tctr];
return ModName;
}
return NULL;
}
//---------------------------------------------------------------------------
struct SImportRec
{
LPSTR RealLibName;
LPSTR LibName;
LPSTR ProcName;
PVOID Pointer;
};
//---------------------------------------------------------------------------
template<typename T> static bool TFindImportRecord(PBYTE ModuleBase, LPSTR LibName, LPSTR ProcName, SImportThunk<T>** LookUpRec, SImportThunk<T>** AddrRec, bool Raw) // Possible not fully correct // TODO: By ordinal
{
DOS_HEADER *DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T> *WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY *ImportDir = &WinHdr->OptionalHeader.DataDirectories.ImportTable;
if(!ImportDir->DirectoryRVA)return NULL;
IMPORT_DESC *Import = (IMPORT_DESC*)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,ImportDir->DirectoryRVA)):(ImportDir->DirectoryRVA)];
T OMask = ((T)1 << ((sizeof(T)*8)-1));
bool ByOrd = ((T)ProcName <= 0xFFFF);
for(DWORD tctr=0;Import[tctr].AddressTabRVA;tctr++)
{
LPSTR ModName = (LPSTR)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].ModuleNameRVA)):(Import[tctr].ModuleNameRVA)];
if(LibName && !IsNamesEqualIC(ModName,LibName))continue; // Can search for a proc of any module
SImportThunk<T>* Table = (SImportThunk<T>*)&((BYTE*)ModuleBase)[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].LookUpTabRVA)):(Import[tctr].LookUpTabRVA)];
SImportThunk<T>* LtRVA = (SImportThunk<T>*)&((BYTE*)ModuleBase)[(Raw)?(RvaToFileOffset(ModuleBase,Import[tctr].AddressTabRVA)):(Import[tctr].AddressTabRVA)];
if(ProcName == LibName) // Secret :) // If we need just any address inside that module
{
for(;!(*Table).Value || !(*LtRVA).Value;Table++,LtRVA++);
if(AddrRec)*AddrRec = LtRVA;
if(LookUpRec)*LookUpRec = Table;
return true;
}
for(DWORD actr=0;Table[actr].Value;actr++)
{
bool OnlyOrd = (Table[actr].Value & OMask);
WORD OIndex = 0;
if(OnlyOrd)
{
if(!ByOrd)continue;
T Ord = Table[actr].Value & ~OMask;
if((T)ProcName != Ord)continue;
OIndex = Ord; // LONGLONG ordinal?
}
else
{
SImportByName* INam = (SImportByName*)&ModuleBase[Table[actr].Value];
if(ByOrd)
{
if(((T)ProcName != INam->Hint))continue;
}
else
{
if(!IsNamesEqual((LPSTR)&INam->Name, ProcName))continue;
}
OIndex = OIndex;
}
if(AddrRec)*AddrRec = &LtRVA[actr];
if(LookUpRec)*LookUpRec = &Table[actr];
return true;
}
}
return false;
}
//---------------------------------------------------------------------------
template<typename T> static PVOID TResolveImportRecord(PVOID ModuleBase, SImportRec* IRec)
{
SImportThunk<T>* AddrRec;
SImportThunk<T>* LookUpRec;
bool ByOrd = ((T)IRec->ProcName <= 0xFFFF);
if(!TFindImportRecord<T>((PBYTE)ModuleBase, IRec->LibName, IRec->ProcName, &LookUpRec, &AddrRec, false))return NULL;
PVOID Old = (PVOID)AddrRec->Value; // What about x64 ???????????????????????????
AddrRec->Value = (T)IRec->Pointer; // NOTE: Offset of address not always have same index as SImportThunk entry!
return Old;
}
//---------------------------------------------------------------------------
static PVOID ResolveImportRecord(PVOID ModuleBase, SImportRec* IRec)
{
if(!IsValidPEHeader(ModuleBase))return NULL;
if(IsValidModuleX64(ModuleBase))return TResolveImportRecord<PETYPE64>(ModuleBase, IRec);
return TResolveImportRecord<PETYPE32>(ModuleBase,IRec);
}
//---------------------------------------------------------------------------
// NOTE: Kernel32.dll exports some functions with a different names(i.e. lstrlen and lstrlenA)
// Will not find a forwarded address
//
template<typename T> _declspec(noinline) static LPSTR TGetProcedureInfoByAddr(PBYTE ModuleBase, PVOID ProcAddr, PDWORD OrdinalOut=NULL, int MatchIdx=0)
{
DOS_HEADER* DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T>* WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY* ExportDir = &WinHdr->OptionalHeader.DataDirectories.ExportTable;
EXPORT_DIR* Export = (EXPORT_DIR*)&ModuleBase[ExportDir->DirectoryRVA];
PDWORD NamePointers = (PDWORD)&ModuleBase[Export->NamePointersRVA];
PDWORD AddressTable = (PDWORD)&ModuleBase[Export->AddressTableRVA];
PWORD OrdinalTable = (PWORD )&ModuleBase[Export->OrdinalTableRVA];
for(UINT Ordinal=0; (Ordinal < Export->FunctionsNumber) && (Ordinal <= 0xFFFF);Ordinal++)
{
PBYTE Addr = &ModuleBase[AddressTable[Ordinal]];
if(Addr != ProcAddr)continue;
MatchIdx--;
if(MatchIdx > 0)continue;
for(DWORD ctr=0;ctr < Export->NamePointersNumber;ctr++) // By name
{
if(Ordinal != OrdinalTable[ctr])continue;
DWORD nrva = NamePointers[ctr];
if(OrdinalOut)*OrdinalOut = Ordinal;
return (LPSTR)&ModuleBase[nrva];
}
break;
}
return NULL;
}
//---------------------------------------------------------------------------
template<typename T, bool Raw=false> _declspec(noinline) static PVOID TGetProcedureAddress(PBYTE ModuleBase, LPSTR ProcName, LPSTR* Forwarder=NULL, PVOID* ProcEntry=NULL) // No forwarding support, no ordinals
{
DOS_HEADER* DosHdr = (DOS_HEADER*)ModuleBase;
WIN_HEADER<T>* WinHdr = (WIN_HEADER<T>*)&ModuleBase[DosHdr->OffsetHeaderPE];
DATA_DIRECTORY* ExportDir = &WinHdr->OptionalHeader.DataDirectories.ExportTable;
if(!ExportDir->DirectoryRVA || !ExportDir->DirectorySize)return NULL; // No export directory!
EXPORT_DIR* Export = (EXPORT_DIR*)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,ExportDir->DirectoryRVA)):(ExportDir->DirectoryRVA)];
PDWORD NamePointers = (PDWORD)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Export->NamePointersRVA)):(Export->NamePointersRVA)];
PDWORD AddressTable = (PDWORD)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Export->AddressTableRVA)):(Export->AddressTableRVA)];
PWORD OrdinalTable = (PWORD )&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,Export->OrdinalTableRVA)):(Export->OrdinalTableRVA)];
SIZE_T Ordinal = (SIZE_T)ProcName;
if(Ordinal <= 0xFFFF) // By Ordnal
{
if(Ordinal < Export->OrdinalBase)return NULL;
Ordinal -= Export->OrdinalBase;
}
else
{
for(DWORD ctr=0;ctr < Export->NamePointersNumber;ctr++) // By name
{
DWORD nrva = NamePointers[ctr];
if(!nrva || !IsNamesEqual((LPSTR)&ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,nrva)):(nrva)],ProcName))continue;
Ordinal = OrdinalTable[ctr]; // Name Ordinal
break;
}
if(Ordinal > 0xFFFF)return NULL;
}
PBYTE Addr = &ModuleBase[(Raw)?(RvaToFileOffset(ModuleBase,AddressTable[Ordinal])):(AddressTable[Ordinal])];
if(ProcEntry)*ProcEntry = &AddressTable[Ordinal];
if(Forwarder && (Addr >= (PBYTE)Export) && (Addr < ((PBYTE)Export+ExportDir->DirectorySize)))*Forwarder = (LPSTR)Addr;
return Addr;
}
//---------------------------------------------------------------------------
static PVOID GetProcedureAddress(PVOID ModuleBase, LPSTR ApiName, LPSTR* Forwarder=NULL, PVOID* ProcEntry=NULL)
{
// DBGMSG("ApiName: %s",ApiName);
if(!ModuleBase)return NULL;
if(!IsValidPEHeader(ModuleBase))return NULL;
if(IsValidModuleX64(ModuleBase))return TGetProcedureAddress<PETYPE64>((PBYTE)ModuleBase,ApiName,Forwarder,ProcEntry);
return TGetProcedureAddress<PETYPE32>((PBYTE)ModuleBase,ApiName,Forwarder,ProcEntry);
}
//---------------------------------------------------------------------------
static PVOID GetProcAddr(PVOID ModuleBase, LPSTR ApiName)
{
LPSTR Forwarder = NULL;
PVOID Addr = GetProcedureAddress(ModuleBase, ApiName, &Forwarder);
if(Addr && Forwarder)
{
int DotPos = 0;
char StrBuf[256];
for(int ctr=0;Forwarder[ctr];ctr++)
if(Forwarder[ctr]=='.')DotPos = ctr;
memcpy(&StrBuf,Forwarder,DotPos);
StrBuf[DotPos] = 0;
ModuleBase = NNTDLL::GetModuleBaseLdr(StrBuf); // GetModuleHandleA(StrBuf); // TODO: Use PEB // How to decode 'api-ms-win-core-com-l1-1-0.dll' ?
if(!ModuleBase)return NULL;
return GetProcAddr(ModuleBase, &Forwarder[DotPos+1]);
}
return Addr;
}
//---------------------------------------------------------------------------
static int ParseForwarderStr(LPSTR InStr, LPSTR OutDllName, LPSTR OutProcName) // NTDLL.RtlDeleteCriticalSection, NTDLL.#491
{
int namctr = 0;
for(;InStr[namctr] && (InStr[namctr] != '.');namctr++)OutDllName[namctr] = InStr[namctr];
OutDllName[namctr++] = '.';
OutDllName[namctr+0] = 'd';
OutDllName[namctr+1] = 'l';
OutDllName[namctr+2] = 'l';
OutDllName[namctr+3] = 0;
if(InStr[namctr] == '#')
{
*OutProcName = 0;
return DecStrToNum<int>(&InStr[++namctr]);
}
else
{
int ctr=0;
for(;InStr[namctr];ctr++,namctr++)OutProcName[ctr] = InStr[namctr];
OutProcName[ctr] = 0;
}
return -1;
}
//---------------------------------------------------------------------------
template<typename T> static SIZE_T TBaseOfImage(PBYTE ModuleBase)