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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (c) 2012-14 Miranda NG project (http://miranda-ng.org),
Copyright (c) 2000-12 Miranda IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "..\..\core\commonheaders.h"
#include "plugins.h"
static IMAGE_SECTION_HEADER *getSectionByRVA(IMAGE_SECTION_HEADER *pISH, int nSections, IMAGE_DATA_DIRECTORY *pIDD)
{
for (int i=0; i < nSections; i++, pISH++)
if (pIDD->VirtualAddress >= pISH->VirtualAddress && pIDD->VirtualAddress + pIDD->Size <= pISH->VirtualAddress + pISH->SizeOfRawData )
return pISH;
return NULL;
}
MUUID* GetPluginInterfaces(const TCHAR* ptszFileName, bool& bIsPlugin)
{
bIsPlugin = false;
HANDLE hFile = CreateFile( ptszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if (hFile == INVALID_HANDLE_VALUE)
return NULL;
MUUID* pResult = NULL;
BYTE* ptr = NULL;
HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL );
__try {
__try {
if ( !hMap )
__leave;
DWORD dwHSize = 0, filesize = GetFileSize( hFile, &dwHSize );
if ( !filesize || filesize == INVALID_FILE_SIZE || dwHSize)
__leave;
if ( filesize < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS) )
__leave;
ptr = (BYTE*)MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
if (ptr == NULL)
__leave;
PIMAGE_NT_HEADERS pINTH;
PIMAGE_DOS_HEADER pIDH = (PIMAGE_DOS_HEADER)ptr;
if ( pIDH->e_magic == IMAGE_DOS_SIGNATURE )
pINTH = (PIMAGE_NT_HEADERS)(ptr + pIDH->e_lfanew);
else
__leave;
if ((PBYTE)pINTH + sizeof(IMAGE_NT_HEADERS) >= ptr + filesize )
__leave;
if ( pINTH->Signature != IMAGE_NT_SIGNATURE )
__leave;
int nSections = pINTH->FileHeader.NumberOfSections;
if ( !nSections )
__leave;
INT_PTR base;
PIMAGE_DATA_DIRECTORY pIDD;
if ( pINTH->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 &&
pINTH->FileHeader.SizeOfOptionalHeader >= sizeof(IMAGE_OPTIONAL_HEADER32) &&
pINTH->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)
{
pIDD = (PIMAGE_DATA_DIRECTORY)( (PBYTE)pINTH + offsetof( IMAGE_NT_HEADERS32, OptionalHeader.DataDirectory ));
base = *(DWORD*)((PBYTE)pINTH + offsetof(IMAGE_NT_HEADERS32, OptionalHeader.ImageBase));
}
else if ( pINTH->FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64 &&
pINTH->FileHeader.SizeOfOptionalHeader >= sizeof(IMAGE_OPTIONAL_HEADER64) &&
pINTH->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
{
pIDD = (PIMAGE_DATA_DIRECTORY)( (PBYTE)pINTH + offsetof( IMAGE_NT_HEADERS64, OptionalHeader.DataDirectory ));
base = *(ULONGLONG*)((PBYTE)pINTH + offsetof(IMAGE_NT_HEADERS64, OptionalHeader.ImageBase ));
}
else __leave;
// Export information entry
DWORD expvaddr = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
DWORD expsize = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
if (expsize < sizeof(IMAGE_EXPORT_DIRECTORY)) __leave;
BYTE* pImage = ptr + pIDH->e_lfanew + pINTH->FileHeader.SizeOfOptionalHeader + sizeof(IMAGE_NT_HEADERS) - sizeof(IMAGE_OPTIONAL_HEADER);
IMAGE_SECTION_HEADER *pExp = getSectionByRVA((IMAGE_SECTION_HEADER *)pImage, nSections, pIDD);
if ( !pExp) __leave;
BYTE *pSecStart = ptr + pExp->PointerToRawData - pExp->VirtualAddress;
IMAGE_EXPORT_DIRECTORY *pED = (PIMAGE_EXPORT_DIRECTORY)&pSecStart[expvaddr];
DWORD *ptrRVA = (DWORD*)&pSecStart[pED->AddressOfNames];
WORD *ptrOrdRVA = (WORD*)&pSecStart[pED->AddressOfNameOrdinals];
DWORD *ptrFuncList = (DWORD*)&pSecStart[pED->AddressOfFunctions];
MUUID* pIds;
bool bHasLoad = false, bHasUnload = false, bHasInfo = false, bHasMuuids = false;
for (size_t i=0; i < pED->NumberOfNames; i++, ptrRVA++, ptrOrdRVA++) {
char *szName = (char*)&pSecStart[*ptrRVA];
if ( !lstrcmpA(szName, "Load"))
bHasLoad = true;
if ( !lstrcmpA(szName, "MirandaPluginInfoEx"))
bHasInfo = true;
else if ( !lstrcmpA(szName, "Unload"))
bHasUnload = true;
else if ( !lstrcmpA(szName, "MirandaInterfaces")) {
bHasMuuids = true;
pIds = (MUUID*)&pSecStart[ ptrFuncList[*ptrOrdRVA]];
}
// old plugin, skip it
else if ( !lstrcmpA(szName, "MirandaPluginInterfaces"))
__leave;
}
// a plugin might have no interfaces
if (bHasLoad && bHasUnload && bHasInfo)
bIsPlugin = true;
if (!bHasLoad || !bHasMuuids || !bHasUnload)
__leave;
int nLength = 1; // one for MIID_LAST
for (MUUID* p = pIds; !equalUUID(*p, miid_last); p++)
nLength++;
pResult = (MUUID*)mir_alloc( sizeof(MUUID)*nLength);
if (pResult)
memcpy(pResult, pIds, sizeof(MUUID)*nLength);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{};
}
__finally
{
if (ptr) UnmapViewOfFile(ptr);
if (hMap) CloseHandle(hMap);
CloseHandle(hFile);
};
return pResult;
}
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