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PeParser.cpp
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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the LICENSE file distributed with
* this work for additional information regarding copyright ownership.
*
* Also, if exists, check the Licenses directory for information about
* third-party modules.
*
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "PeParser.h"
#include "FileRoutines.h"
#include <stdio.h>
#include <stdlib.h>
#include <winternl.h>
//-----------------------------------------------------------
#define MAX_EXPORTS_COUNT 65536
#define MAX_EXPORTS_FUNCTION_NAME_LENGTH 512
#define MAX_EXPORTS_FORWARDER_NAME_LENGTH 512
#define MAX_IMPORTS_PER_DLL_COUNT 65536
#define MAX_IMPORTS_DLL_NAME_LENGTH 512
#define MAX_IMPORTS_FUNCTION_NAME_LENGTH 512
#define __ALLOCATION_GRANULARITY 65536
#define __CACHE_SIZE (4 * __ALLOCATION_GRANULARITY)
#define ViewShare 1
//-----------------------------------------------------------
namespace MX {
CPEParser::CPEParser() : CBaseMemObj(), CNonCopyableObj()
{
return;
}
CPEParser::~CPEParser()
{
Finalize();
return;
}
HRESULT CPEParser::InitializeFromFileName(_In_z_ LPCWSTR szFileNameW, _In_opt_ DWORD dwParseFlags)
{
CWindowsHandle cFileH;
HRESULT hRes;
Finalize();
//open file
hRes = FileRoutines::OpenFileWithEscalatingSharing(szFileNameW, &cFileH);
if (SUCCEEDED(hRes))
hRes = InitializeFromFileHandle(cFileH.Get(), dwParseFlags);
//done
return hRes;
}
HRESULT CPEParser::InitializeFromFileHandle(_In_ HANDLE _hFile, _In_opt_ DWORD dwParseFlags)
{
ULARGE_INTEGER uliFileSize;
HRESULT hRes;
if (_hFile == NULL || _hFile == INVALID_HANDLE_VALUE)
return E_INVALIDARG;
Finalize();
if (::DuplicateHandle(::GetCurrentProcess(), _hFile, ::GetCurrentProcess(), &hFile, 0, FALSE,
DUPLICATE_SAME_ACCESS) == FALSE)
{
return MX_HRESULT_FROM_LASTERROR();
}
if (::GetFileSizeEx(hFile, (PLARGE_INTEGER)&uliFileSize) == FALSE)
return MX_HRESULT_FROM_LASTERROR();
#if defined(_M_IX86)
nDataSize = (uliFileSize.HighPart != 0) ? 0xFFFFFFFFUL : (SIZE_T)(uliFileSize.LowPart);
#elif defined(_M_X64)
nDataSize = uliFileSize.QuadPart;
#else
#error Unsupported platform
#endif
lpBaseAddress = (LPBYTE)0x100000; //dummy value used as a reference
//parse PE
hRes = DoParse(dwParseFlags);
if (FAILED(hRes))
{
Finalize();
return hRes;
}
//done
return S_OK;
}
HRESULT CPEParser::InitializeFromProcessHandle(_In_opt_ HANDLE _hProc, _In_opt_ DWORD dwParseFlags)
{
LPBYTE lpPeb;
#if defined(_M_X64)
BOOL bIs32BitProcess = FALSE;
#endif //_M_X64
ULONG dwTemp;
SIZE_T nRead;
HRESULT hRes;
//get process' PEB
if (_hProc == NULL || _hProc == MX_CURRENTPROCESS)
{
#if defined(_M_IX86)
lpPeb = (LPBYTE)__readfsdword(0x30); //get PEB from the TIB
#elif defined(_M_X64)
LPBYTE lpPtr = (LPBYTE)__readgsqword(0x30); //get TEB
lpPeb = *((LPBYTE*)(lpPtr + 0x60));
#else
#error Unsupported platform
#endif
}
else
{
#if defined(_M_X64)
ULONGLONG nPeb32;
#endif
PROCESS_BASIC_INFORMATION sPbi;
ULONG k;
NTSTATUS nNtStatus;
if (::DuplicateHandle(::GetCurrentProcess(), _hProc, ::GetCurrentProcess(), &hProc, 0, FALSE,
DUPLICATE_SAME_ACCESS) == FALSE)
{
hRes = MX_HRESULT_FROM_LASTERROR();
Finalize();
return hRes;
}
#if defined(_M_X64)
nNtStatus = ::MxNtQueryInformationProcess(hProc, MxProcessWow64Information, &nPeb32, (ULONG)sizeof(nPeb32), &k);
if (NT_SUCCESS(nNtStatus) && nPeb32 != 0)
{
lpPeb = (LPBYTE)nPeb32;
bIs32BitProcess = TRUE;
}
else
{
#endif //_M_X64
nNtStatus = ::MxNtQueryInformationProcess(hProc, MxProcessBasicInformation, &sPbi, (ULONG)sizeof(sPbi), &k);
if (!NT_SUCCESS(nNtStatus))
{
Finalize();
return MX_HRESULT_FROM_WIN32(::MxRtlNtStatusToDosError(nNtStatus));
}
lpPeb = (LPBYTE)sPbi.PebBaseAddress;
#if defined(_M_X64)
}
#endif //_M_X64
}
if (lpPeb == NULL)
{
Finalize();
return MX_E_ReadFault;
}
//read ImageBaseAddress from PEB
#if defined(_M_X64)
if (bIs32BitProcess == FALSE)
{
ULONGLONG qwTemp;
if (hProc != NULL)
{
if (::ReadProcessMemory(hProc, lpPeb + 0x10, &qwTemp, sizeof(qwTemp), &nRead) == FALSE || nRead != sizeof(qwTemp))
{
Finalize();
return MX_E_ReadFault;
}
}
else
{
if (::MxTryMemCopy(&qwTemp, lpPeb + 0x10, sizeof(qwTemp)) != sizeof(qwTemp))
{
Finalize();
return MX_E_ReadFault;
}
}
lpBaseAddress = (LPBYTE)qwTemp;
}
else
{
#endif //_M_X64
if (hProc != NULL)
{
if (::ReadProcessMemory(hProc, lpPeb + 0x08, &dwTemp, sizeof(dwTemp), &nRead) == FALSE || nRead != sizeof(dwTemp))
{
Finalize();
return MX_E_ReadFault;
}
}
else
{
if (::MxTryMemCopy(&dwTemp, lpPeb + 0x08, sizeof(dwTemp)) != sizeof(dwTemp))
{
Finalize();
return MX_E_ReadFault;
}
}
#if defined(_M_X64)
lpBaseAddress = (LPBYTE)UlongToPtr(dwTemp);
#else //_M_X64
lpBaseAddress = (LPBYTE)dwTemp;
#endif //_M_X64
#if defined(_M_X64)
}
#endif //_M_X64
nDataSize = 0x80000000; //we can do a fine-tunning of image size but this should be enough
//setup image mapping type
bImageIsMapped = TRUE;
//parse PE
hRes = DoParse(dwParseFlags);
if (FAILED(hRes))
{
Finalize();
return hRes;
}
//done
return S_OK;
}
HRESULT CPEParser::InitializeFromMemory(_In_ LPCVOID _lpBaseAddress, _In_ SIZE_T nImageSize, _In_ BOOL _bImageIsMapped,
_In_opt_ DWORD dwParseFlags)
{
HRESULT hRes;
if (_lpBaseAddress == NULL)
return E_POINTER;
if (nImageSize < sizeof(IMAGE_DOS_HEADER))
return MX_HRESULT_FROM_WIN32(ERROR_BAD_EXE_FORMAT);
lpBaseAddress = (LPBYTE)_lpBaseAddress;
nDataSize = nImageSize;
bImageIsMapped = _bImageIsMapped;
//parse PE
hRes = DoParse(dwParseFlags);
if (FAILED(hRes))
{
Finalize();
return hRes;
}
//done
return S_OK;
}
VOID CPEParser::Finalize()
{
if (hFile != NULL && hFile != INVALID_HANDLE_VALUE)
::CloseHandle(hFile);
if (hProc != NULL)
::CloseHandle(hProc);
//----
ClearVars();
return;
}
LPBYTE CPEParser::RvaToVa(_In_ DWORD dwVirtualAddress)
{
PIMAGE_SECTION_HEADER lpFileImgSect;
SIZE_T i;
if (bImageIsMapped != FALSE)
return lpBaseAddress + (SIZE_T)dwVirtualAddress;
lpFileImgSect = cFileImgSect.Get();
for (i = 0; i < nSectionsCount; i++)
{
if (dwVirtualAddress >= lpFileImgSect[i].VirtualAddress &&
dwVirtualAddress < lpFileImgSect[i].VirtualAddress + lpFileImgSect[i].Misc.VirtualSize)
{
return lpBaseAddress + (SIZE_T)dwVirtualAddress - (SIZE_T)(lpFileImgSect[i].VirtualAddress) +
(SIZE_T)(lpFileImgSect[i].PointerToRawData);
}
}
return NULL;
}
_Success_(return != FALSE)
BOOL CPEParser::ReadRaw(_Out_writes_bytes_(nBytes) LPVOID lpDest, _In_ LPCVOID lpSrc, _In_ SIZE_T nBytes)
{
SIZE_T nOffset;
if ((SIZE_T)lpSrc < (SIZE_T)lpBaseAddress)
return FALSE;
nOffset = (SIZE_T)lpSrc - (SIZE_T)lpBaseAddress;
if (nOffset > nDataSize)
return FALSE;
if (nBytes > nDataSize - nOffset)
return FALSE;
if (nBytes == 0)
return TRUE;
if (hProc != NULL)
{
SIZE_T nRead;
if (::ReadProcessMemory(hProc, lpBaseAddress + nOffset, lpDest, nBytes, &nRead) == FALSE || nBytes != nRead)
return FALSE;
}
else if (hFile != NULL)
{
while (nBytes > 0)
{
SIZE_T nOffsetInCache, nToReadThisRound;
//check if data to read is in cache
if (nOffset < sFileCache.nOffset || nOffset >= sFileCache.nOffset + sFileCache.nLength)
{
//cache is invalid, refresh
MX_IO_STATUS_BLOCK sIoStatus;
LARGE_INTEGER liOffset;
LONG nNtStatus;
liOffset.QuadPart = (LONGLONG)(ULONGLONG)nOffset;
//read from file
::MxMemSet(&sIoStatus, 0, sizeof(sIoStatus));
nNtStatus = ::MxNtReadFile(hFile, NULL, NULL, NULL, &sIoStatus, sFileCache.aBuffer,
(ULONG)sizeof(sFileCache.aBuffer), &liOffset, NULL);
if (nNtStatus == STATUS_PENDING)
{
nNtStatus = ::MxNtWaitForSingleObject(hFile, FALSE, NULL);
if (NT_SUCCESS(nNtStatus))
nNtStatus = sIoStatus.Status;
}
if (nNtStatus < 0 || sIoStatus.Information == 0)
{
sFileCache.nOffset = sFileCache.nLength = 0; //invalidate cache
return FALSE;
}
//update cache info
sFileCache.nOffset = nOffset;
sFileCache.nLength = (SIZE_T)(sIoStatus.Information);
}
//here cache is valid, proceed with read
nOffsetInCache = nOffset - sFileCache.nOffset;
nToReadThisRound = nBytes;
if (nToReadThisRound > sFileCache.nLength - nOffsetInCache)
nToReadThisRound = sFileCache.nLength - nOffsetInCache;
//copy data
::MxMemCopy(lpDest, sFileCache.aBuffer + nOffsetInCache, nToReadThisRound);
//advance offset
lpDest = (LPBYTE)lpDest + nToReadThisRound;
nOffset += nToReadThisRound;
nBytes -= nToReadThisRound;
}
}
else
{
if (::MxTryMemCopy(lpDest, lpSrc, nBytes) != nBytes)
return FALSE;
}
return TRUE;
}
HRESULT CPEParser::ReadAnsiString(_Out_ CStringA &cStrA, _In_ LPVOID lpNameAddress, _In_ SIZE_T nMaxLength)
{
CHAR szTempBufA[8];
SIZE_T nThisLen;
cStrA.Empty();
if (cStrA.EnsureBuffer(nMaxLength) == FALSE)
return E_OUTOFMEMORY;
while (cStrA.GetLength() < nMaxLength)
{
if (ReadRaw(szTempBufA, lpNameAddress, MX_ARRAYLEN(szTempBufA)) == FALSE)
return MX_E_ReadFault;
for (nThisLen=0; nThisLen<MX_ARRAYLEN(szTempBufA) && szTempBufA[nThisLen]!=0; nThisLen++);
if (cStrA.ConcatN(szTempBufA, nThisLen) == FALSE)
return E_OUTOFMEMORY;
if (nThisLen < MX_ARRAYLEN(szTempBufA))
break;
lpNameAddress = (LPBYTE)lpNameAddress + MX_ARRAYLEN(szTempBufA);
}
return (cStrA.GetLength() < nMaxLength) ? S_OK : MX_E_InvalidData;
}
VOID CPEParser::ClearVars()
{
hFile = NULL;
hProc = NULL;
wMachine = IMAGE_FILE_MACHINE_UNKNOWN;
lpOriginalImageBaseAddress = NULL;
lpBaseAddress = NULL;
nDataSize = 0;
bImageIsMapped = FALSE;
::MxMemSet(&sDosHdr, 0, sizeof(sDosHdr));
::MxMemSet(&uNtHdr, 0, sizeof(uNtHdr));
nSectionsCount = 0;
cFileImgSect.Reset();
sImportsInfo.aDllList.RemoveAllElements();
sExportsInfo.dwCharacteristics = 0;
sExportsInfo.wMajorVersion = sExportsInfo.wMinorVersion = 0;
sExportsInfo.aEntries.RemoveAllElements();
lpResourceDir = NULL;
cVersionInfo.Reset();
nVersionInfoSize = 0;
return;
}
HRESULT CPEParser::DoParse(_In_ DWORD dwParseFlags)
{
#define DATADIR32(entry) uNtHdr.s32.OptionalHeader.DataDirectory[entry]
#define DATADIR64(entry) uNtHdr.s64.OptionalHeader.DataDirectory[entry]
union {
DWORD dwImageSignature;
IMAGE_FILE_HEADER sFileHeader;
};
LPBYTE lpNtHdr;
HRESULT hRes;
if (ReadRaw(&sDosHdr, lpBaseAddress, sizeof(sDosHdr)) == FALSE)
return MX_E_ReadFault;
if (sDosHdr.e_magic != IMAGE_DOS_SIGNATURE)
return MX_E_InvalidData;
//calculate NT header
lpNtHdr = lpBaseAddress + (SIZE_T)(ULONG)(sDosHdr.e_lfanew);
//check signature
if (ReadRaw(&dwImageSignature, lpNtHdr, sizeof(dwImageSignature)) == FALSE)
return MX_E_ReadFault;
if (dwImageSignature != IMAGE_NT_SIGNATURE)
return MX_E_InvalidData;
//read file header
if (ReadRaw(&sFileHeader, lpNtHdr + sizeof(DWORD), sizeof(sFileHeader)) == FALSE)
return MX_E_ReadFault;
//check machine
switch (wMachine = sFileHeader.Machine)
{
case IMAGE_FILE_MACHINE_I386:
if (ReadRaw(&(uNtHdr.s32), lpNtHdr, sizeof(uNtHdr.s32)) == FALSE)
return MX_E_ReadFault;
//get original image base address
lpOriginalImageBaseAddress = UlongToPtr(uNtHdr.s32.OptionalHeader.ImageBase);
//get PE sections
nSectionsCount = (SIZE_T)(uNtHdr.s32.FileHeader.NumberOfSections);
if (nSectionsCount > 0)
{
cFileImgSect.Attach((PIMAGE_SECTION_HEADER)MX_MALLOC(nSectionsCount * sizeof(IMAGE_SECTION_HEADER)));
if (!cFileImgSect)
return E_OUTOFMEMORY;
if (ReadRaw(cFileImgSect.Get(), (PIMAGE_SECTION_HEADER)(lpNtHdr + sizeof(uNtHdr.s32)),
nSectionsCount * sizeof(IMAGE_SECTION_HEADER)) == FALSE)
{
return MX_E_ReadFault;
}
}
//parse import table
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseImportTables) != 0)
{
if (DATADIR32(IMAGE_DIRECTORY_ENTRY_IMPORT).VirtualAddress != 0 &&
DATADIR32(IMAGE_DIRECTORY_ENTRY_IMPORT).Size != 0)
{
PIMAGE_IMPORT_DESCRIPTOR lpImportDesc;
lpImportDesc = (PIMAGE_IMPORT_DESCRIPTOR)RvaToVa(DATADIR32(IMAGE_DIRECTORY_ENTRY_IMPORT).VirtualAddress);
if (lpImportDesc != NULL)
hRes = DoParseImportTable(lpImportDesc);
else
hRes = MX_E_InvalidData;
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
sImportsInfo.aDllList.RemoveAllElements();
}
}
}
//parse export table
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseExportTable) != 0)
{
if (DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress != 0 &&
DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).Size != 0)
{
PIMAGE_EXPORT_DIRECTORY lpExportDir;
lpExportDir = (PIMAGE_EXPORT_DIRECTORY)RvaToVa(DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress);
if (lpExportDir != NULL)
{
hRes = DoParseExportTable(lpExportDir, DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress,
DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress +
DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).Size);
}
else
{
hRes = MX_E_InvalidData;
}
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
sExportsInfo.dwCharacteristics = 0;
sExportsInfo.wMajorVersion = 0;
sExportsInfo.wMinorVersion = 0;
sExportsInfo.aEntries.RemoveAllElements();
}
}
}
//parse resources
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseResources) != 0)
{
if (DATADIR32(IMAGE_DIRECTORY_ENTRY_RESOURCE).VirtualAddress != 0 &&
DATADIR32(IMAGE_DIRECTORY_ENTRY_RESOURCE).Size != 0)
{
lpResourceDir = (PIMAGE_RESOURCE_DIRECTORY)RvaToVa(DATADIR32(IMAGE_DIRECTORY_ENTRY_RESOURCE).VirtualAddress);
if (lpResourceDir != NULL)
hRes = DoParseResources();
else
hRes = MX_E_InvalidData;
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
lpResourceDir = NULL;
cVersionInfo.Reset();
nVersionInfoSize = 0;
}
}
}
break;
#if defined(_M_X64)
case IMAGE_FILE_MACHINE_AMD64:
if (ReadRaw(&(uNtHdr.s64), lpNtHdr, sizeof(uNtHdr.s64)) == FALSE)
return MX_E_ReadFault;
//get original image base address
lpOriginalImageBaseAddress = (LPVOID)(uNtHdr.s64.OptionalHeader.ImageBase);
//get PE sections
nSectionsCount = (SIZE_T)(uNtHdr.s64.FileHeader.NumberOfSections);
if (nSectionsCount > 0)
{
cFileImgSect.Attach((PIMAGE_SECTION_HEADER)MX_MALLOC(nSectionsCount * sizeof(IMAGE_SECTION_HEADER)));
if (!cFileImgSect)
return E_OUTOFMEMORY;
if (ReadRaw(cFileImgSect.Get(), (PIMAGE_SECTION_HEADER)(lpNtHdr + sizeof(uNtHdr.s64)),
nSectionsCount * sizeof(IMAGE_SECTION_HEADER)) == FALSE)
{
return MX_E_ReadFault;
}
}
//parse import table
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseImportTables) != 0)
{
if (DATADIR64(IMAGE_DIRECTORY_ENTRY_IMPORT).VirtualAddress != 0 &&
DATADIR64(IMAGE_DIRECTORY_ENTRY_IMPORT).Size != 0)
{
PIMAGE_IMPORT_DESCRIPTOR lpImportDesc;
lpImportDesc = (PIMAGE_IMPORT_DESCRIPTOR)RvaToVa(DATADIR64(IMAGE_DIRECTORY_ENTRY_IMPORT).VirtualAddress);
if (lpImportDesc != NULL)
hRes = DoParseImportTable(lpImportDesc);
else
hRes = MX_E_InvalidData;
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
sImportsInfo.aDllList.RemoveAllElements();
}
}
}
//parse export table
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseExportTable) != 0)
{
if (DATADIR64(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress != 0 &&
DATADIR64(IMAGE_DIRECTORY_ENTRY_EXPORT).Size != 0)
{
PIMAGE_EXPORT_DIRECTORY lpExportDir;
lpExportDir = (PIMAGE_EXPORT_DIRECTORY)RvaToVa(DATADIR64(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress);
if (lpExportDir != NULL)
{
hRes = DoParseExportTable(lpExportDir, DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress,
DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).VirtualAddress +
DATADIR32(IMAGE_DIRECTORY_ENTRY_EXPORT).Size);
}
else
{
hRes = MX_E_InvalidData;
}
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
sExportsInfo.dwCharacteristics = 0;
sExportsInfo.wMajorVersion = 0;
sExportsInfo.wMinorVersion = 0;
sExportsInfo.aEntries.RemoveAllElements();
}
}
}
//parse resources
if ((dwParseFlags & MX_PEPARSER_FLAG_ParseResources) != 0)
{
if (DATADIR64(IMAGE_DIRECTORY_ENTRY_RESOURCE).VirtualAddress != 0 &&
DATADIR64(IMAGE_DIRECTORY_ENTRY_RESOURCE).Size != 0)
{
lpResourceDir = (PIMAGE_RESOURCE_DIRECTORY)RvaToVa(DATADIR64(IMAGE_DIRECTORY_ENTRY_RESOURCE).VirtualAddress);
if (lpResourceDir != NULL)
hRes = DoParseResources();
else
hRes = MX_E_InvalidData;
if (FAILED(hRes))
{
if ((hRes != MX_E_InvalidData && hRes != MX_E_ReadFault) ||
(dwParseFlags & MX_PEPARSER_FLAG_IgnoreMalformed) == 0)
{
return hRes;
}
lpResourceDir = NULL;
cVersionInfo.Reset();
nVersionInfoSize = 0;
}
}
}
break;
#endif //_M_X64
default:
return MX_E_Unsupported;
}
//done
return S_OK;
#undef DATADIR64
#undef DATADIR32
}
HRESULT CPEParser::DoParseImportTable(_In_ PIMAGE_IMPORT_DESCRIPTOR lpImportDesc)
{
TAutoDeletePtr<CImportedDll> cDllEntry;
IMAGE_IMPORT_DESCRIPTOR sImportDesc;
LPBYTE lpNameAddress, lpThunk, lpFunctionThunk;
union {
IMAGE_THUNK_DATA32 s32;
#if defined(_M_X64)
IMAGE_THUNK_DATA64 s64;
#endif //_M_X64
} uThunkData;
CStringA cStrFuncNameA;
LPIMPORTED_FUNCTION lpNewEntry;
DWORD dwOrdinal;
LPVOID lpFuncAddress;
HRESULT hRes;
restart:
cDllEntry.Attach(MX_DEBUG_NEW CImportedDll());
if (!cDllEntry)
return E_OUTOFMEMORY;
if (ReadRaw(&sImportDesc, lpImportDesc, sizeof(sImportDesc)) == FALSE)
return MX_E_ReadFault;
// See if we've reached an empty IMAGE_IMPORT_DESCRIPTOR
if (sImportDesc.TimeDateStamp == 0 && sImportDesc.Name == 0)
return S_OK;
lpNameAddress = RvaToVa(sImportDesc.Name);
if (lpNameAddress == NULL)
return MX_E_InvalidData;
hRes = ReadAnsiString(cDllEntry->cStrNameA, lpNameAddress, MAX_IMPORTS_DLL_NAME_LENGTH);
if (FAILED(hRes))
return hRes;
if (cDllEntry->cStrNameA.IsEmpty() != FALSE)
return MX_E_InvalidData;
lpFunctionThunk = NULL;
if (sImportDesc.OriginalFirstThunk == 0)
{
if (sImportDesc.FirstThunk == 0)
return MX_E_InvalidData;
lpThunk = RvaToVa(sImportDesc.FirstThunk);
}
else
{
lpThunk = RvaToVa(sImportDesc.OriginalFirstThunk);
if (bImageIsMapped != FALSE)
{
lpFunctionThunk = RvaToVa(sImportDesc.FirstThunk);
if (lpFunctionThunk == NULL || lpThunk == NULL)
return MX_E_InvalidData;
}
}
switch (wMachine)
{
case IMAGE_FILE_MACHINE_I386:
while (1)
{
if (ReadRaw(&uThunkData, lpThunk, sizeof(uThunkData.s32)) == FALSE)
return MX_E_ReadFault;
if (uThunkData.s32.u1.AddressOfData == 0)
break;
if (uThunkData.s32.u1.Ordinal & IMAGE_ORDINAL_FLAG32)
{
dwOrdinal = (DWORD)IMAGE_ORDINAL32(uThunkData.s32.u1.Ordinal);
cStrFuncNameA.Empty();
}
else
{
dwOrdinal = 0xFFFFFFFFUL;
if (uThunkData.s32.u1.AddressOfData == 0)
return MX_E_InvalidData;
lpNameAddress = RvaToVa((DWORD)(uThunkData.s32.u1.AddressOfData));
if (lpNameAddress == NULL)
return MX_E_InvalidData;
lpNameAddress += 2; //skip hint
hRes = ReadAnsiString(cStrFuncNameA, lpNameAddress, MAX_IMPORTS_FUNCTION_NAME_LENGTH);
if (FAILED(hRes))
return hRes;
}
lpFuncAddress = NULL;
if (lpFunctionThunk != NULL)
{
if (ReadRaw(&uThunkData, lpFunctionThunk, sizeof(uThunkData.s32)) == FALSE)
return MX_E_ReadFault;
lpFuncAddress = ULongToPtr(uThunkData.s32.u1.Function);
}
//create new entry
lpNewEntry = (LPIMPORTED_FUNCTION)MX_MALLOC(sizeof(IMPORTED_FUNCTION) + cStrFuncNameA.GetLength());
if (lpNewEntry == NULL)
return E_OUTOFMEMORY;
lpNewEntry->dwOrdinal = dwOrdinal;
lpNewEntry->lpAddress = lpFuncAddress;
::MxMemCopy(lpNewEntry->szNameA, (LPCSTR)cStrFuncNameA, cStrFuncNameA.GetLength());
lpNewEntry->szNameA[cStrFuncNameA.GetLength()] = 0;
//add to list
if (cDllEntry->aEntries.AddElement(lpNewEntry) == FALSE)
{
MX_FREE(lpNewEntry);
return E_OUTOFMEMORY;
}
//advance to next
lpThunk += sizeof(uThunkData.s32);
if (lpFunctionThunk != NULL)
lpFunctionThunk += sizeof(uThunkData.s32);
}
break;
#if defined(_M_X64)
case IMAGE_FILE_MACHINE_AMD64:
while (1)
{
if (ReadRaw(&uThunkData, lpThunk, sizeof(uThunkData.s64)) == FALSE)
return MX_E_ReadFault;
if (uThunkData.s64.u1.AddressOfData == 0)
break;
if (uThunkData.s64.u1.Ordinal & IMAGE_ORDINAL_FLAG64)
{
dwOrdinal = (DWORD)IMAGE_ORDINAL64(uThunkData.s64.u1.Ordinal);
cStrFuncNameA.Empty();
}
else
{
dwOrdinal = 0xFFFFFFFFUL;
if (uThunkData.s64.u1.AddressOfData == 0)
return MX_E_InvalidData;
lpNameAddress = RvaToVa((DWORD)(uThunkData.s64.u1.AddressOfData));
if (lpNameAddress == NULL)
return MX_E_InvalidData;
lpNameAddress += 2; //skip hint
hRes = ReadAnsiString(cStrFuncNameA, lpNameAddress, MAX_IMPORTS_FUNCTION_NAME_LENGTH);
if (FAILED(hRes))
return hRes;
}
lpFuncAddress = NULL;
if (lpFunctionThunk != NULL)
{
if (ReadRaw(&uThunkData, lpFunctionThunk, sizeof(uThunkData.s64)) == FALSE)
return MX_E_ReadFault;
lpFuncAddress = (LPVOID)(uThunkData.s64.u1.Function);
}
//create new entry
lpNewEntry = (LPIMPORTED_FUNCTION)MX_MALLOC(sizeof(IMPORTED_FUNCTION) + cStrFuncNameA.GetLength());
if (lpNewEntry == NULL)
return E_OUTOFMEMORY;
lpNewEntry->dwOrdinal = dwOrdinal;
lpNewEntry->lpAddress = lpFuncAddress;
::MxMemCopy(lpNewEntry->szNameA, (LPCSTR)cStrFuncNameA, cStrFuncNameA.GetLength());
lpNewEntry->szNameA[cStrFuncNameA.GetLength()] = 0;
//add to list
if (cDllEntry->aEntries.AddElement(lpNewEntry) == FALSE)
{
MX_FREE(lpNewEntry);
return E_OUTOFMEMORY;
}
//advance to next
lpThunk += sizeof(uThunkData.s64);
if (lpFunctionThunk != NULL)
lpFunctionThunk += sizeof(uThunkData.s64);
}
break;
#endif //_M_X64
}
//add dll to list
if (sImportsInfo.aDllList.AddElement(cDllEntry.Get()) == FALSE)
return E_OUTOFMEMORY;
cDllEntry.Detach();
lpImportDesc++;
goto restart;
}
HRESULT CPEParser::DoParseExportTable(_In_ PIMAGE_EXPORT_DIRECTORY lpExportDir, _In_ DWORD dwStartRVA,
_In_ DWORD dwEndRVA)
{
IMAGE_EXPORT_DIRECTORY sExportDir;
LPEXPORTED_FUNCTION lpNewEntry;
CStringA cStrFuncNameA, cStrForwardsToA;
LPDWORD lpdwAddressOfFunctions, lpdwAddressOfNames;
LPWORD lpwAddressOfNameOrdinals;
TAutoFreePtr<WORD> aNameOrdinalsList;
DWORD dw, dw2, dwNumberOfNames, dwFuncAddress, dwNameAddress;
LPVOID lpFuncAddress;
HRESULT hRes;
if (ReadRaw(&sExportDir, lpExportDir, sizeof(sExportDir)) == FALSE)
return MX_E_ReadFault;
sExportsInfo.dwCharacteristics = sExportDir.Characteristics;
sExportsInfo.wMajorVersion = sExportDir.MajorVersion;
sExportsInfo.wMinorVersion = sExportDir.MinorVersion;
//get addresses
lpdwAddressOfFunctions = NULL;
if (sExportDir.NumberOfFunctions > 0)
{
lpdwAddressOfFunctions = (LPDWORD)RvaToVa(sExportDir.AddressOfFunctions);
if (lpdwAddressOfFunctions == NULL)
return MX_E_InvalidData;
}
lpdwAddressOfNames = NULL;
lpwAddressOfNameOrdinals = NULL;
if (sExportDir.NumberOfNames > 0)
{
lpdwAddressOfNames = (LPDWORD)RvaToVa(sExportDir.AddressOfNames);
lpwAddressOfNameOrdinals = (LPWORD)RvaToVa(sExportDir.AddressOfNameOrdinals);
if (lpdwAddressOfNames == NULL || lpwAddressOfNameOrdinals == NULL)
return MX_E_InvalidData;
}
dwNumberOfNames = (sExportDir.NumberOfNames > MAX_EXPORTS_COUNT) ? MAX_EXPORTS_COUNT : sExportDir.NumberOfNames;
if (dwNumberOfNames > 0)
{
aNameOrdinalsList.Attach((LPWORD)MX_MALLOC((SIZE_T)dwNumberOfNames * sizeof(WORD)));
if (!aNameOrdinalsList)
return E_OUTOFMEMORY;
if (ReadRaw(aNameOrdinalsList.Get(), lpwAddressOfNameOrdinals, (SIZE_T)dwNumberOfNames * sizeof(WORD)) == FALSE)
return MX_E_ReadFault;
}
for (dw=0; dw<sExportDir.NumberOfFunctions && dw<MAX_EXPORTS_COUNT; dw++)
{
if (ReadRaw(&dwFuncAddress, &lpdwAddressOfFunctions[dw], sizeof(dwFuncAddress)) == FALSE)
return MX_E_ReadFault;
if (dwFuncAddress == 0)
continue; //skip gaps
lpFuncAddress = NULL;
cStrForwardsToA.Empty();
if (dwFuncAddress >= dwStartRVA && dwFuncAddress < dwEndRVA)
{
//forwarder function
LPBYTE lpNameAddress;
LPCSTR sA;
lpNameAddress = RvaToVa(dwFuncAddress);
if (lpNameAddress == NULL)
return MX_E_InvalidData;
hRes = ReadAnsiString(cStrForwardsToA, lpNameAddress, MAX_EXPORTS_FORWARDER_NAME_LENGTH);
if (FAILED(hRes))
return hRes;
if (cStrForwardsToA.IsEmpty() != FALSE)
return MX_E_InvalidData;
sA = StrChrA((LPCSTR)cStrForwardsToA, '.');
if (sA == NULL || sA == (LPCSTR)cStrForwardsToA || *(sA+1) == 0)
return MX_E_InvalidData;
}
else
{
lpFuncAddress = RvaToVa(dwFuncAddress);
if (lpFuncAddress == NULL)
return MX_E_InvalidData;
}
//check if a name exists
dwNameAddress = 0;
for (dw2=0; dw2<dwNumberOfNames; dw2++)
{
if (aNameOrdinalsList[dw2] == dw)
{
if (ReadRaw(&dwNameAddress, &lpdwAddressOfNames[dw2], sizeof(dwNameAddress)) == FALSE)
return MX_E_ReadFault;
if (dwNameAddress != 0)
{
LPBYTE lpNameAddress;
lpNameAddress = RvaToVa(dwNameAddress);
if (lpNameAddress == NULL)
return MX_E_InvalidData;
hRes = ReadAnsiString(cStrFuncNameA, lpNameAddress, MAX_EXPORTS_FUNCTION_NAME_LENGTH);
if (FAILED(hRes))
return hRes;
}
break;
}
}
//create new entry
lpNewEntry = (LPEXPORTED_FUNCTION)MX_MALLOC(sizeof(EXPORTED_FUNCTION) + cStrFuncNameA.GetLength() +
((cStrForwardsToA.IsEmpty() == FALSE)
? (cStrForwardsToA.GetLength() + 1) : 0));
if (lpNewEntry == NULL)