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|
// Checksum Tool
// By Bio (C) 2012
#define _VERSION_ "2.0"
#include "commonheaders.h"
//#define DEBUG_SECTIONS 1
// Return codes
#define RESULT_OK 0
#define RESULT_NOTFOUND 10
#define RESULT_READERROR 20
#define RESULT_NOTPE 30
#define RESULT_CORRUPTED 40
#define RESULT_INVALID 50
#define RESULT_NONE 100
int PEChecksum( TCHAR *filename, mir_md5_byte_t digest[16] )
{
HANDLE hFile = INVALID_HANDLE_VALUE;
HANDLE hMap;
PBYTE ptr = 0;
int res = RESULT_OK;
DWORD filesize;
DWORD hsize = 0;
WORD machine = 0;
DWORD sections = 0;
hFile = CreateFile( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if ( hFile == INVALID_HANDLE_VALUE ) {
return RESULT_NOTFOUND;
}
// check minimum and maximum size
filesize = GetFileSize( hFile, &hsize );
if ( !filesize || filesize == INVALID_FILE_SIZE || hsize )
{
CloseHandle( hFile );
return RESULT_INVALID;
}
if ( filesize < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS) )
{
CloseHandle( hFile );
return RESULT_NOTPE;
}
hMap = CreateFileMapping( hFile, NULL, PAGE_WRITECOPY, 0, 0, NULL );
if ( hMap )
ptr = (PBYTE)MapViewOfFile( hMap, FILE_MAP_COPY, 0, 0 ,0 );
if ( ptr )
{
PIMAGE_DOS_HEADER pIDH = 0;
PIMAGE_NT_HEADERS pINTH = 0;
pIDH = (PIMAGE_DOS_HEADER)ptr;
if ( pIDH->e_magic == IMAGE_DOS_SIGNATURE )
pINTH = (PIMAGE_NT_HEADERS)( ptr + pIDH->e_lfanew );
if ( !pINTH)
res = RESULT_NOTPE;
else
if ( (PBYTE)pINTH + sizeof(IMAGE_NT_HEADERS) >= ptr + filesize )
res = RESULT_CORRUPTED;
else
if ( pINTH->Signature != IMAGE_NT_SIGNATURE )
res = RESULT_NOTPE;
else
{
machine = pINTH->FileHeader.Machine;
/*
switch(machine)
{
case IMAGE_FILE_MACHINE_I386:
_ftprintf( stderr, _T("(x86) ") );
break;
case IMAGE_FILE_MACHINE_AMD64:
_ftprintf( stderr, _T("(x64) ") );
break;
case IMAGE_FILE_MACHINE_IA64:
_ftprintf( stderr, _T("(IA64 :-) ") );
break;
default:
_ftprintf( stderr, _T("(unknown) ") );
break;
}
*/
sections = pINTH->FileHeader.NumberOfSections;
if ( !sections )
res = RESULT_INVALID;
else
{
PIMAGE_DATA_DIRECTORY pIDD = 0;
DWORD dbgsize = 0;
DWORD dbgvaddr = 0;
DWORD expsize = 0;
DWORD expvaddr = 0;
if ( ( 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 ) );
}
else
if ( ( 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 ) );
}
else
res = RESULT_CORRUPTED;
if ( pIDD )
{
// Debugging information entry
dbgvaddr = pIDD[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
dbgsize = pIDD[IMAGE_DIRECTORY_ENTRY_DEBUG].Size;
// Export information entry
expvaddr = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
expsize = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
}
if ( res == RESULT_OK )
{
PIMAGE_SECTION_HEADER pISH = 0;
DWORD offset;
DWORD idx = 0;
mir_md5_state_t pms;
mir_md5_init( &pms );
// try to found correct offset independent of architectures
offset = pIDH->e_lfanew + pINTH->FileHeader.SizeOfOptionalHeader + sizeof(IMAGE_NT_HEADERS) - sizeof(IMAGE_OPTIONAL_HEADER);
while ( idx < sections )
{
pISH = (PIMAGE_SECTION_HEADER)( ptr + offset + idx * sizeof(IMAGE_SECTION_HEADER) );
if ( (PBYTE)pISH + sizeof(IMAGE_SECTION_HEADER) > ptr + filesize )
{
res = RESULT_CORRUPTED;
break;
}
if ( pISH->PointerToRawData + pISH->SizeOfRawData > filesize )
{
res = RESULT_CORRUPTED;
break;
}
#ifdef DEBUG_SECTIONS
_ftprintf( stderr, _T("%s - %08X - %d "), pISH->Name, pISH->PointerToRawData, pISH->SizeOfRawData);
{
int i;
mir_md5_byte_t digest2[16];
mir_md5_state_t pms2;
mir_md5_init( &pms2 );
mir_md5_append( &pms2, ptr + pISH->PointerToRawData, pISH->SizeOfRawData );
mir_md5_finish( &pms2, digest2 );
for ( i = 0; i < sizeof( digest2 ) / sizeof( digest2[0] ); i++ )
_ftprintf( stderr, _T("%02X"), digest2[i] );
_ftprintf( stderr, _T("\n") );
}
#endif
// erase timestamp and debug information
if (( dbgsize >= sizeof( IMAGE_DEBUG_DIRECTORY ) ) &&
( dbgvaddr >= pISH->VirtualAddress ) &&
( dbgvaddr + dbgsize <= pISH->VirtualAddress + pISH->SizeOfRawData ) )
{
DWORD shift = dbgvaddr - pISH->VirtualAddress;
PIMAGE_DEBUG_DIRECTORY pDBG = (PIMAGE_DEBUG_DIRECTORY)( ptr + shift + pISH->PointerToRawData );
pDBG->TimeDateStamp = 0;
#ifdef DEBUG_SECTIONS
_ftprintf( stderr, _T("found debug section entry %08X ( %d ), data %08X ( %d ) \n"), pISH->PointerToRawData + shift, dbgsize, pDBG->PointerToRawData, pDBG->SizeOfData );
#endif
if ( pDBG->SizeOfData > 0 &&
( pDBG->PointerToRawData >= pISH->PointerToRawData ) &&
( pDBG->PointerToRawData + pDBG->SizeOfData <= pISH->PointerToRawData + pISH->SizeOfRawData ) )
{
ZeroMemory( ptr + pDBG->PointerToRawData, pDBG->SizeOfData );
}
//ZeroMemory( ptr + pISH->PointerToRawData + shift, dbgsize );
}
// erase export timestamp
if (( expsize >= sizeof( IMAGE_EXPORT_DIRECTORY ) ) &&
( expvaddr >= pISH->VirtualAddress ) &&
( expvaddr + expsize <= pISH->VirtualAddress + pISH->SizeOfRawData ) )
{
DWORD shift = expvaddr - pISH->VirtualAddress;
PIMAGE_EXPORT_DIRECTORY pEXP = (PIMAGE_EXPORT_DIRECTORY)( ptr + shift + pISH->PointerToRawData );
pEXP->TimeDateStamp = 0;
#ifdef DEBUG_SECTIONS
_ftprintf( stderr, _T("found export section entry %08X\n"), pISH->PointerToRawData + shift );
#endif
}
mir_md5_append( &pms, ptr + pISH->PointerToRawData, pISH->SizeOfRawData );
idx++;
}
if ( res == RESULT_OK )
mir_md5_finish( &pms, digest );
}
}
}
}
else
res = RESULT_READERROR;
if ( ptr )
UnmapViewOfFile( ptr );
if ( hMap )
CloseHandle( hMap );
CloseHandle( hFile );
return res;
}
TCHAR* trtrim( TCHAR *str )
{
if ( str == NULL )
return NULL;
TCHAR* p = _tcschr( str, 0 );
while ( --p >= str )
{
switch ( *p )
{
case L' ': case L'\t': case L'\n': case L'\r':
*p = 0; break;
default:
return str;
}
}
return str;
}
int process(TCHAR *filename)
{
int res;
mir_md5_byte_t digest[16] = {0};
res = PEChecksum( filename, digest);
switch(res)
{
case RESULT_NOTFOUND:
_ftprintf( stderr, _T("'%s'... not found!\n"), filename );
break;
case RESULT_READERROR:
_ftprintf( stderr, _T("'%s'... read error!\n"), filename );
break;
case RESULT_NOTPE:
_ftprintf( stderr, _T("'%s'... not PE type!\n"), filename );
break;
case RESULT_CORRUPTED:
_ftprintf( stderr, _T("'%s'... corrupted!\n"), filename );
break;
case RESULT_OK:
{
int i;
_ftprintf( stdout, _T("%s "), filename );
for ( i = 0; i < sizeof( digest ) / sizeof( digest[0] ); i++ )
_ftprintf( stdout, _T("%02X"), digest[i] );
_ftprintf( stdout, _T("\n") );
break;
}
default:
break;
}
return res;
}
int _tmain( int argc, TCHAR *argv[] )
{
TCHAR buf[ MAX_PATH ];
int res = 0;
int cnt = 0;
_ftprintf( stderr, _T("* PE CHECKSUM TOOL * VERSION %s\n\n"), _VERSION_ );
if ( argc > 1 )
{
WIN32_FIND_DATA ffd;
HANDLE hFind = INVALID_HANDLE_VALUE;
_ftprintf( stderr, _T("Processing ... \n") );
for ( int i=1; i < argc; i++ )
{
hFind = FindFirstFile( argv[i], &ffd );
while( hFind != INVALID_HANDLE_VALUE )
{
if ( ! ( ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) )
{
res = process( ffd.cFileName );
cnt++;
}
if ( !FindNextFile( hFind, &ffd ) )
break;
}
FindClose( hFind );
}
_ftprintf( stderr, _T("%d file(s) processed.\n"), cnt );
}
else
{
while ( _fgetts( buf, sizeof( buf ), stdin ) != NULL )
{
if ( !cnt )
_ftprintf( stderr, _T("Processing ... \n") );
trtrim( buf );
res = process( buf );
cnt++;
}
if ( cnt )
_ftprintf( stderr, _T("%d file(s) processed.\n"), cnt );
else
{
_ftprintf( stderr, _T("Usage: checksum.exe [*.dll] ... [*.exe]\n") );
_ftprintf( stderr, _T("Example: dir /b /s | checksum.exe > hashes.txt\n") );
res = RESULT_NONE;
}
}
return res;
}
|
