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program Test;
uses Windows, SysUtils;
{$R resource.Res} // resource.rc = EXE FILE "Hello.exe" //
type
{ Resource Dir String }
PImageResourceDirString = ^TImageResourceDirString;
TImageResourceDirString = packed record
Length: Word;
NameString: array[0..0] of WCHAR;
end;
{ Data Entry }
PImageResourceDataEntry = ^TImageResourceDataEntry;
TImageResourceDataEntry = packed record
OffsetToData: DWORD;
Size: DWORD;
CodePage: DWORD;
Reserved: DWORD;
end;
{ Dir Entry }
PImageResourceDirectoryEntry = ^TImageResourceDirectoryEntry;
TImageResourceDirectoryEntry = packed record
Name: DWORD;
OffsetToData: DWORD;
end;
{ Directory }
PImageResourceDirectory = ^TImageResourceDirectory;
TImageResourceDirectory = packed record
Characteristics: DWORD;
TimeDateStamp: DWORD;
MajorVersion: Word;
MinorVersion: Word;
NumberOfNamedEntries: Word;
NumberOfIdEntries: Word;
end;
const
IMAGE_RESOURCE_DATA_IS_DIRECTORY: DWORD = $80000000;
IMAGE_STRIP_HIGH_BIT: DWORD = $7FFFFFFF;
function StripHighBit(dwValue:DWORD):DWORD;
begin
Result := dwValue and IMAGE_STRIP_HIGH_BIT;
end;
function IsDirectory(dwValue:DWORD):Boolean;
begin
Result := FALSE;
if ((dwValue and IMAGE_RESOURCE_DATA_IS_DIRECTORY) <> 0) then
Result := TRUE;
end;
function WideCharToMultiByteEx(var lp: PWideChar): string; // function from ErazerZ's UntPeFile
var
len: Word;
begin
len := Word(lp^);
SetLength(Result, len);
Inc(lp);
WideCharToMultiByte(CP_ACP, 0, lp, Len, PChar(Result), Len +1, nil, nil);
Inc(lp, len);
Result := PChar(Result);
end;
function GetResource(szResourceType:string; szResourceName:string; var pResource:Pointer; var dwResourceSize:DWORD):Boolean;
var
IDH: PImageDosHeader;
INH: PImageNtHeaders;
i: DWORD;
RootIRD: PImageResourceDirectory;
SubIRD: PImageResourceDirectory;
DataIRD: PImageResourceDirectory;
RootEntry: PImageResourceDirectoryEntry;
SubEntry: PImageResourceDirectoryEntry;
DataEntry: PImageResourceDirectoryEntry;
ResData: PImageResourceDataEntry;
ResType: PImageResourceDirString;
ResName: PImageResourceDirString;
hModule: DWORD;
szResType: string;
szResName: string;
begin
Result := FALSE;
hModule := GetModuleHandle(nil);
if (hModule <> 0) then
begin
IDH := Pointer(hModule);
if (IDH^.e_magic = IMAGE_DOS_SIGNATURE) then
begin
INH := Pointer(hModule + IDH^._lfanew);
if (INH^.Signature = IMAGE_NT_SIGNATURE) then
begin
if (INH^.OptionalHeader.DataDirectory[2].VirtualAddress > 0) then
begin
RootIRD := Pointer(hModule + INH^.OptionalHeader.DataDirectory[2].VirtualAddress);
RootEntry := Pointer(DWORD(RootIRD) + SizeOf(TImageResourceDirectory));
for i := 0 to (RootIRD^.NumberOfNamedEntries + RootIRD^.NumberOfIdEntries) - 1 do
begin
if (IsDirectory(RootEntry^.Name)) then
begin
ResType := Pointer(hModule + INH^.OptionalHeader.DataDirectory[2].VirtualAddress + StripHighBit(RootEntry^.Name));
szResType := WideCharToMultiByteEx(PWideChar(DWORD(ResType)));
if (szResType = szResourceType) then
begin
SubIRD := Pointer(DWORD(RootIRD) + StripHighBit(RootEntry^.OffsetToData));
SubEntry := Pointer(DWORD(SubIRD) + SizeOf(TImageResourceDirectory));
if (IsDirectory(SubEntry^.Name)) then
begin
ResName := Pointer(DWORD(RootIRD) + StripHighBit(SubEntry^.Name));
szResName := WideCharToMultiByteEx(PWideChar(DWORD(ResName)));
if (szResName = szResourceName) then
begin
Result := TRUE;
DataIRD := Pointer(DWORD(RootIRD) + StripHighBit(SubEntry^.OffsetToData));
DataEntry := Pointer(DWORD(DataIRD) + SizeOf(TImageResourceDirectory));
ResData := Pointer(DWORD(RootIRD) + DataEntry^.OffsetToData);
pResource := Pointer(hModule + ResData^.OffsetToData);
dwResourceSize := ResData^.Size;
Exit;
end;
end;
end;
end;
Inc(RootEntry);
end;
end;
end;
end;
end;
end;
var
pRes: Pointer;
dwSize: DWORD;
szMsg: string;
begin
if (GetResource('FILE', 'EXE', pRes, dwSize)) then
begin
szMsg := 'Address: ' + IntToHex(DWORD(pRes), 8) + #13#10 +
'Size: ' + IntToHex(dwSize, 8) + #13#10 +
'First byte: ' + IntToHex(PByte(pRes)^, 0);
MessageBoxA(0, PChar(szMsg), 'RESOURCES', 0);
end;
end.
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