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PEImage.cpp
618 lines (509 loc) · 19.5 KB
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PEImage.cpp
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#include "../PE/PEImage.h"
#include "../Include/Macro.h"
#include "../Misc/Utils.h"
#include "../Misc/DynImport.h"
#include <algorithm>
#define TLS32(ptr) ((const IMAGE_TLS_DIRECTORY32*)ptr) // TLS directory
#define TLS64(ptr) ((const IMAGE_TLS_DIRECTORY64*)ptr) // TLS directory
#define THK32(ptr) ((const IMAGE_THUNK_DATA32*)ptr) // Import thunk data
#define THK64(ptr) ((const IMAGE_THUNK_DATA64*)ptr) // Import thunk data
namespace blackbone
{
namespace pe
{
PEImage::PEImage( void )
{
}
PEImage::~PEImage( void )
{
Release();
}
/// <summary>
/// Load image from file
/// </summary>
/// <param name="path">File path</param>
/// <param name="skipActx">If true - do not initialize activation context</param>
/// <returns>Status code</returns>
NTSTATUS PEImage::Load( const std::wstring& path, bool skipActx /*= false*/ )
{
Release( true );
_imagePath = path;
_noFile = false;
_hFile = CreateFileW(
path.c_str(), FILE_GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, 0, NULL
);
if (_hFile)
{
// Try mapping as image
_hMapping = CreateFileMappingW( _hFile, NULL, SEC_IMAGE | PAGE_READONLY, 0, 0, NULL );
if (_hMapping)
{
_isPlainData = false;
_pFileBase = Mapping( MapViewOfFile( _hMapping, FILE_MAP_READ, 0, 0, 0 ) );
}
// Map as simple datafile
else
{
_isPlainData = true;
_hMapping = CreateFileMappingW( _hFile, NULL, PAGE_READONLY, 0, 0, NULL );
if (_hMapping)
_pFileBase = Mapping( MapViewOfFile( _hMapping, FILE_MAP_READ, 0, 0, 0 ) );
}
// Mapping failed
if (!_pFileBase)
return LastNtStatus();
}
else
return LastNtStatus();
auto status = Parse();
if (!NT_SUCCESS( status ))
return status;
return skipActx ? status : PrepareACTX( _imagePath.c_str() );
}
/// <summary>
/// Load image from memory location
/// </summary>
/// <param name="pData">Image data</param>
/// <param name="size">Data size.</param>
/// <param name="plainData">If false - data has image layout</param>
/// <returns>Status code</returns>
NTSTATUS PEImage::Load( void* pData, size_t size, bool plainData /*= true */ )
{
Release( true );
_noFile = true;
_pFileBase = pData;
_isPlainData = plainData;
auto status = Parse();
if (!NT_SUCCESS( status ))
return status;
return PrepareACTX();
}
/// <summary>
/// Reload closed image
/// </summary>
/// <returns>Status code</returns>
NTSTATUS PEImage::Reload()
{
return Load( _imagePath );
}
/// <summary>
/// Release mapping, if any
/// </summary>
/// <param name="temporary">Preserve file paths for file reopening</param>
void PEImage::Release( bool temporary /*= false*/ )
{
_pFileBase.reset();
_hMapping.reset();
_hFile.reset();
_hctx.reset();
// Reset pointers to data
_pImageHdr32 = nullptr;
_pImageHdr64 = nullptr;
if(!temporary)
{
_imagePath.clear();
// Ensure temporary file is deleted
if (_noFile)
DeleteFileW( _manifestPath.c_str() );
_manifestPath.clear();
}
}
/// <summary>
/// Parses PE image
/// </summary>
/// <returns>Status code</returns>
NTSTATUS PEImage::Parse( void* pImageBase /*= nullptr*/ )
{
const IMAGE_DOS_HEADER *pDosHdr = nullptr;
const IMAGE_SECTION_HEADER *pSection = nullptr;
if (pImageBase != nullptr)
_pFileBase = pImageBase;
// Something went wrong
if (!_pFileBase)
return STATUS_INVALID_ADDRESS;
// Get DOS header
pDosHdr = reinterpret_cast<const IMAGE_DOS_HEADER*>(_pFileBase.get());
// File not a valid PE file
if (pDosHdr->e_magic != IMAGE_DOS_SIGNATURE)
return STATUS_INVALID_IMAGE_FORMAT;
// Get image header
_pImageHdr32 = reinterpret_cast<PCHDR32>(reinterpret_cast<const uint8_t*>(pDosHdr) + pDosHdr->e_lfanew);
_pImageHdr64 = reinterpret_cast<PCHDR64>(_pImageHdr32);
// File not a valid PE file
if (_pImageHdr32->Signature != IMAGE_NT_SIGNATURE)
return STATUS_INVALID_IMAGE_FORMAT;
auto GetHeaderData = [this, &pSection]( auto pImageHeader )
{
_imgBase = pImageHeader->OptionalHeader.ImageBase;
_imgSize = pImageHeader->OptionalHeader.SizeOfImage;
_hdrSize = pImageHeader->OptionalHeader.SizeOfHeaders;
_epRVA = pImageHeader->OptionalHeader.AddressOfEntryPoint;
_subsystem = pImageHeader->OptionalHeader.Subsystem;
_DllCharacteristics = pImageHeader->OptionalHeader.DllCharacteristics;
pSection = reinterpret_cast<const IMAGE_SECTION_HEADER*>(pImageHeader + 1);
};
// Detect x64 image
if (_pImageHdr32->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
{
_is64 = true;
GetHeaderData( _pImageHdr64 );
}
else
{
_is64 = false;
GetHeaderData( _pImageHdr32 );
}
// Exe file
_isExe = !(_pImageHdr32->FileHeader.Characteristics & IMAGE_FILE_DLL);
// Pure IL image
auto pCorHdr = reinterpret_cast<PIMAGE_COR20_HEADER>(DirectoryAddress( IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR ));
_isPureIL = (pCorHdr && (pCorHdr->Flags & COMIMAGE_FLAGS_ILONLY)) ? true : false;
if (_isPureIL)
{
_ILFlagOffset = static_cast<int32_t>(
reinterpret_cast<uint8_t*>(pCorHdr)
- reinterpret_cast<uint8_t*>(_pFileBase.get())
+ static_cast<int32_t>(offsetof( IMAGE_COR20_HEADER, Flags )));
#ifdef COMPILER_MSVC
if (_netImage.Init( _imagePath ))
_netImage.Parse();
#endif
}
// Sections
for (int i = 0; i < _pImageHdr32->FileHeader.NumberOfSections; ++i, ++pSection)
_sections.emplace_back( *pSection );
return STATUS_SUCCESS;
}
/// <summary>
/// Processes image imports
/// </summary>
/// <param name="useDelayed">Process delayed import instead</param>
/// <returns>Import data</returns>
mapImports& PEImage::GetImports( bool useDelayed /*= false*/ )
{
if(useDelayed)
{
auto pImportTbl = reinterpret_cast<PIMAGE_DELAYLOAD_DESCRIPTOR>(DirectoryAddress( IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT ));
if (!pImportTbl)
return _delayImports;
// Delayed Imports
for (; pImportTbl->DllNameRVA; ++pImportTbl)
{
uint8_t* pRVA = nullptr;
DWORD IAT_Index = 0;
char *pDllName = reinterpret_cast<char*>(ResolveRVAToVA( pImportTbl->DllNameRVA ));
auto dllStr = Utils::AnsiToWstring( pDllName );
pRVA = reinterpret_cast<uint8_t*>(ResolveRVAToVA( pImportTbl->ImportNameTableRVA ));
while (_is64 ? THK64( pRVA )->u1.AddressOfData : THK32( pRVA )->u1.AddressOfData)
{
uint64_t AddressOfData = _is64 ? THK64( pRVA )->u1.AddressOfData : THK32( pRVA )->u1.AddressOfData;
auto pAddressTable = reinterpret_cast<IMAGE_IMPORT_BY_NAME*>(ResolveRVAToVA( static_cast<uintptr_t>(AddressOfData) ));
ImportData data;
// import by name
if (AddressOfData < (_is64 ? IMAGE_ORDINAL_FLAG64 : IMAGE_ORDINAL_FLAG32) && pAddressTable->Name[0])
{
data.importByOrd = false;
data.importName = reinterpret_cast<const char*>(pAddressTable->Name);
data.importOrdinal = 0;
}
// import by ordinal
else
{
data.importByOrd = true;
data.importOrdinal = static_cast<WORD>(AddressOfData & 0xFFFF);
}
data.ptrRVA = pImportTbl->ImportAddressTableRVA + IAT_Index;
_delayImports[dllStr].emplace_back( data );
// Go to next entry
pRVA += _is64 ? sizeof(IMAGE_THUNK_DATA64) : sizeof(IMAGE_THUNK_DATA32);
IAT_Index += _is64 ? sizeof(uint64_t) : sizeof(uint32_t);
}
}
return _delayImports;
}
else
{
auto *pImportTbl = reinterpret_cast<PIMAGE_IMPORT_DESCRIPTOR>(DirectoryAddress( IMAGE_DIRECTORY_ENTRY_IMPORT ));
if (!pImportTbl)
return _imports;
// Imports
for (; pImportTbl->Name; ++pImportTbl)
{
uint8_t* pRVA = nullptr;
DWORD IAT_Index = 0;
char *pDllName = reinterpret_cast<char*>(ResolveRVAToVA( pImportTbl->Name ));
auto dllStr = Utils::AnsiToWstring( pDllName );
pRVA = reinterpret_cast<uint8_t*>(ResolveRVAToVA(
pImportTbl->OriginalFirstThunk ?
pImportTbl->OriginalFirstThunk :
pImportTbl->FirstThunk ));
while (_is64 ? THK64( pRVA )->u1.AddressOfData : THK32( pRVA )->u1.AddressOfData)
{
uint64_t AddressOfData = _is64 ? THK64( pRVA )->u1.AddressOfData : THK32( pRVA )->u1.AddressOfData;
auto* pAddressTable = reinterpret_cast<IMAGE_IMPORT_BY_NAME*>(ResolveRVAToVA( static_cast<uintptr_t>(AddressOfData) ));
ImportData data;
// import by name
if (AddressOfData < (_is64 ? IMAGE_ORDINAL_FLAG64 : IMAGE_ORDINAL_FLAG32) && pAddressTable->Name[0])
{
data.importByOrd = false;
data.importName = reinterpret_cast<const char*>(pAddressTable->Name);
data.importOrdinal = 0;
}
// import by ordinal
else
{
data.importByOrd = true;
data.importOrdinal = static_cast<WORD>(AddressOfData & 0xFFFF);
}
// Save address to IAT
if (pImportTbl->FirstThunk)
data.ptrRVA = pImportTbl->FirstThunk + IAT_Index;
// Save address to OrigianlFirstThunk
else
data.ptrRVA = static_cast<uintptr_t>(AddressOfData) - reinterpret_cast<uintptr_t>(_pFileBase.get());
_imports[dllStr].emplace_back( data );
// Go to next entry
pRVA += _is64 ? sizeof(IMAGE_THUNK_DATA64) : sizeof(IMAGE_THUNK_DATA32);
IAT_Index += _is64 ? sizeof(uint64_t) : sizeof(uint32_t);
}
}
return _imports;
}
}
/// <summary>
/// Retrieve all exported functions with names
/// </summary>
/// <param name="names">Found exports</param>
void PEImage::GetExports( vecExports& exports )
{
exports.clear();
Reload();
auto pExport = reinterpret_cast<PIMAGE_EXPORT_DIRECTORY>(DirectoryAddress( IMAGE_DIRECTORY_ENTRY_EXPORT ));
if (pExport == 0)
return;
DWORD *pAddressOfNames = reinterpret_cast<DWORD*>(pExport->AddressOfNames + reinterpret_cast<uintptr_t>(_pFileBase.get()));
DWORD *pAddressOfFuncs = reinterpret_cast<DWORD*>(pExport->AddressOfFunctions + reinterpret_cast<uintptr_t>(_pFileBase.get()));
WORD *pAddressOfOrds = reinterpret_cast<WORD*> (pExport->AddressOfNameOrdinals + reinterpret_cast<size_t>(_pFileBase.get()));
for (DWORD i = 0; i < pExport->NumberOfNames; ++i)
exports.push_back( ExportData( reinterpret_cast<const char*>(_pFileBase.get())+pAddressOfNames[i], pAddressOfFuncs[pAddressOfOrds[i]] ) );
std::sort( exports.begin(), exports.end() );
return Release( true );
}
/// <summary>
/// Retrieve data directory address
/// </summary>
/// <param name="index">Directory index</param>
/// <param name="keepRelative">Keep address relative to image base</param>
/// <returns>Directory address</returns>
uintptr_t PEImage::DirectoryAddress( int index, AddressType type /*= VA*/ ) const
{
// Sanity check
if (index < 0 || index >= IMAGE_NUMBEROF_DIRECTORY_ENTRIES)
return 0;
const auto idd = _is64 ? _pImageHdr64->OptionalHeader.DataDirectory : _pImageHdr32->OptionalHeader.DataDirectory;
return idd[index].VirtualAddress == 0 ? 0 : ResolveRVAToVA( idd[index].VirtualAddress, type );
}
/// <summary>
/// Get data directory size
/// </summary>
/// <param name="index">Data directory index</param>
/// <returns>Data directory size</returns>
size_t PEImage::DirectorySize( int index ) const
{
// Sanity check
if (index < 0 || index >= IMAGE_NUMBEROF_DIRECTORY_ENTRIES)
return 0;
const IMAGE_DATA_DIRECTORY* idd = _is64 ? _pImageHdr64->OptionalHeader.DataDirectory : _pImageHdr32->OptionalHeader.DataDirectory;
return idd[index].VirtualAddress != 0 ? static_cast<size_t>(idd[index].Size) : 0;
}
/// <summary>
/// Resolve virtual memory address to physical file offset
/// </summary>
/// <param name="Rva">Memory address</param>
/// <param name="keepRelative">Keep address relative to file start</param>
/// <returns>Resolved address</returns>
uintptr_t PEImage::ResolveRVAToVA( uintptr_t Rva, AddressType type /*= VA*/ ) const
{
switch (type)
{
case blackbone::pe::RVA:
return Rva;
case blackbone::pe::VA:
case blackbone::pe::RPA:
if (_isPlainData)
{
for (auto& sec : _sections)
{
if (Rva >= sec.VirtualAddress && Rva < sec.VirtualAddress + sec.Misc.VirtualSize)
if (type == VA)
return reinterpret_cast<uintptr_t>(_pFileBase.get()) + Rva - sec.VirtualAddress + sec.PointerToRawData;
else
return Rva - sec.VirtualAddress + sec.PointerToRawData;
}
return 0;
}
else
return (type == VA) ? (reinterpret_cast<uintptr_t>(_pFileBase.get()) + Rva) : Rva;
default:
return 0;
}
}
/// <summary>
/// Retrieve image TLS callbacks
/// Callbacks are rebased for target image
/// </summary>
/// <param name="targetBase">Target image base</param>
/// <param name="result">Found callbacks</param>
/// <returns>Number of TLS callbacks in image</returns>
int PEImage::GetTLSCallbacks( module_t targetBase, std::vector<ptr_t>& result ) const
{
uint8_t *pTls = reinterpret_cast<uint8_t*>(DirectoryAddress( IMAGE_DIRECTORY_ENTRY_TLS ));
uint64_t* pCallback = 0;
if (!pTls)
return 0;
uint64_t offset = _is64 ? TLS64( pTls )->AddressOfCallBacks : TLS32( pTls )->AddressOfCallBacks;
if (offset == 0)
return 0;
// Not at base
if (imageBase() != reinterpret_cast<module_t>(_pFileBase.get()))
pCallback = reinterpret_cast<uint64_t*>(ResolveRVAToVA( static_cast<size_t>(offset - imageBase()) ));
else
pCallback = reinterpret_cast<uint64_t*>(offset);
if(_is64)
{
for (; *pCallback; pCallback++)
result.push_back( REBASE( *pCallback, imageBase(), targetBase ) );
}
else
{
for (uint32_t *pCallback2 = reinterpret_cast<uint32_t*>(pCallback); *pCallback2; pCallback2++)
result.push_back( REBASE( *pCallback2, imageBase(), targetBase ) );
}
return (int)result.size();
}
/// <summary>
/// Prepare activation context
/// </summary>
/// <param name="filepath">Path to PE file. If nullptr - manifest is extracted from memory to disk</param>
/// <returns>Status code</returns>
NTSTATUS PEImage::PrepareACTX( const wchar_t* filepath /*= nullptr*/ )
{
wchar_t tempPath[256] = { 0 };
uint32_t manifestSize = 0;
ACTCTXW act = { 0 };
act.cbSize = sizeof( act );
// No manifest found, skip
auto pManifest = GetManifest( manifestSize, _manifestIdx );
if (!pManifest)
return STATUS_SUCCESS;
//
// Dump manifest to TMP folder
//
if (filepath == nullptr)
{
wchar_t tempDir[256] = { 0 };
GetTempPathW( ARRAYSIZE( tempDir ), tempDir );
if (GetTempFileNameW( tempDir, L"ImageManifest", 0, tempPath ) == 0)
return STATUS_SXS_CANT_GEN_ACTCTX;
auto hTmpFile = Handle( CreateFileW( tempPath, FILE_GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, 0, NULL ) );
if (hTmpFile)
{
DWORD bytes = 0;
WriteFile( hTmpFile, pManifest, manifestSize, &bytes, NULL );
hTmpFile.reset();
act.lpSource = tempPath;
_manifestPath = tempPath;
}
else
return LastNtStatus();
}
else
{
act.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID;
act.lpResourceName = MAKEINTRESOURCEW( _manifestIdx );
act.lpSource = filepath;
_manifestPath = _imagePath;
}
// Create ACTX
_hctx = CreateActCtxW( &act );
if (_hctx)
return STATUS_SUCCESS;
// Return success if current process is protected
if (LastNtStatus() == STATUS_ACCESS_DENIED)
{
_manifestIdx = 0;
return STATUS_SUCCESS;
}
return LastNtStatus();
}
/// <summary>
/// Get manifest from image data
/// </summary>
/// <param name="size">Manifest size</param>
/// <param name="manifestID">Mmanifest ID</param>
/// <returns>Manifest data</returns>
void* PEImage::GetManifest( uint32_t& size, int32_t& manifestID )
{
// 3 levels of pointers to nodes
const IMAGE_RESOURCE_DIRECTORY_ENTRY *pDirNode1 = nullptr;
const IMAGE_RESOURCE_DIRECTORY_ENTRY *pDirNode2 = nullptr;
const IMAGE_RESOURCE_DIRECTORY_ENTRY *pDirNode3 = nullptr;
// 3 levels of nodes
const IMAGE_RESOURCE_DIRECTORY *pDirNodePtr1 = nullptr;
const IMAGE_RESOURCE_DIRECTORY *pDirNodePtr2 = nullptr;
// resource entry data
const IMAGE_RESOURCE_DATA_ENTRY *pDataNode = nullptr;
size_t ofst_1 = 0; // first level nodes offset
size_t ofst_2 = 0; // second level nodes offset
size_t ofst_3 = 0; // third level nodes offset
// Get section base
auto secBase = DirectoryAddress( IMAGE_DIRECTORY_ENTRY_RESOURCE );
if (secBase == 0)
{
size = 0;
manifestID = 0;
return nullptr;
}
pDirNodePtr1 = reinterpret_cast<const IMAGE_RESOURCE_DIRECTORY*>(secBase);
ofst_1 += sizeof( IMAGE_RESOURCE_DIRECTORY );
// first-level nodes
for (int i = 0; i < pDirNodePtr1->NumberOfIdEntries + pDirNodePtr1->NumberOfNamedEntries; ++i)
{
pDirNode1 = reinterpret_cast<const IMAGE_RESOURCE_DIRECTORY_ENTRY*>(secBase + ofst_1);
// Not a manifest directory
if (!pDirNode1->DataIsDirectory || pDirNode1->Id != 0x18)
{
ofst_1 += sizeof( IMAGE_RESOURCE_DIRECTORY_ENTRY );
continue;
}
pDirNodePtr2 = reinterpret_cast<const IMAGE_RESOURCE_DIRECTORY*>(secBase + pDirNode1->OffsetToDirectory);
ofst_2 = pDirNode1->OffsetToDirectory + sizeof( IMAGE_RESOURCE_DIRECTORY );
// second-level nodes
for (int j = 0; j < pDirNodePtr2->NumberOfIdEntries + pDirNodePtr2->NumberOfNamedEntries; ++j)
{
pDirNode2 = reinterpret_cast<const IMAGE_RESOURCE_DIRECTORY_ENTRY*>(secBase + ofst_2);
if (!pDirNode2->DataIsDirectory)
{
ofst_2 += sizeof( IMAGE_RESOURCE_DIRECTORY_ENTRY );
continue;
}
// Check if this is a valid manifest resource
if (pDirNode2->Id == 1 || pDirNode2->Id == 2 || pDirNode2->Id == 3)
{
ofst_3 = pDirNode2->OffsetToDirectory + sizeof( IMAGE_RESOURCE_DIRECTORY );
pDirNode3 = reinterpret_cast<const IMAGE_RESOURCE_DIRECTORY_ENTRY*>(secBase + ofst_3);
pDataNode = reinterpret_cast<const IMAGE_RESOURCE_DATA_ENTRY*>(secBase + pDirNode3->OffsetToData);
manifestID = pDirNode2->Id;
size = pDataNode->Size;
return reinterpret_cast<void*>(ResolveRVAToVA( pDataNode->OffsetToData ));
}
ofst_2 += sizeof( IMAGE_RESOURCE_DIRECTORY_ENTRY );
}
ofst_1 += sizeof( IMAGE_RESOURCE_DIRECTORY_ENTRY );
}
return nullptr;
}
}
}