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>
function PointerToFunctionAddress(Code: Pointer): PPointer;
Var func: PImportCode;
begin
Result:=nil;
if Code=nil then exit;
try
func:=code;
if (func.JumpInstruction=$25FF) then begin
Result:=func.AddressOfPointerToFunction;
end;
except
Result:=nil;
end;
end;
function FinalFunctionAddress(Code: Pointer): Pointer;
Var func: PImportCode;
begin
Result:=Code;
if Code=nil then exit;
try
func:=code;
if (func.JumpInstruction=$25FF) then begin
Result:=func.AddressOfPointerToFunction^;
end;
except
Result:=nil;
end;
end;
Function PatchAddress(OldFunc, NewFunc: Pointer): Integer;
Var BeenDone: TList;
Function PatchAddressInModule(hModule: THandle; OldFunc, NewFunc: Pointer): Integer;
Var Dos: PImageDosHeader; NT: PImageNTHeaders;
ImportDesc: PImage_Import_Entry; rva: DWORD;
Func: PPointer; DLL: String; f: Pointer; written: DWORD;
begin
Result:=0;
Dos:=Pointer(hModule);
if BeenDone.IndexOf(Dos)>=0 then exit;
BeenDone.Add(Dos);
OldFunc:=FinalFunctionAddress(OldFunc);
if IsBadReadPtr(Dos,SizeOf(TImageDosHeader)) then exit;
if Dos.e_magic<>IMAGE_DOS_SIGNATURE then exit;
NT :=Pointer(Integer(Dos) + dos._lfanew);
// if IsBadReadPtr(NT,SizeOf(TImageNtHeaders)) then exit;
RVA:=NT^.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
if RVA=0 then exit;
ImportDesc := pointer(integer(Dos)+RVA);
While (ImportDesc^.Name<>0) do begin
DLL:=PChar(Integer(Dos)+ImportDesc^.Name);
PatchAddressInModule(GetModuleHandle(PChar(DLL)),OldFunc,NewFunc); Func:=Pointer(Integer(DOS)+ImportDesc.LookupTable);
While Func^<>nil do begin
f:=FinalFunctionAddress(Func^);
if f=OldFunc then begin
WriteProcessMemory(GetCurrentProcess,Func,@NewFunc,4,written); If Written>0 then Inc(Result);
end;
Inc(Func);
end;
Inc(ImportDesc);
end;
end;
begin
BeenDone:=TList.Create;
try
Result:=PatchAddressInModule(GetModuleHandle(nil),OldFunc,NewFunc); finally
BeenDone.Free;
end;
end;
procedure HookTextOut(ConvertFunction: TConvertTextFunction);
begin
if @OldTextOutA=nil then
@OldTextOutA:=FinalFunctionAddress(@TextOutA);
if @OldTextOutW=nil then
@OldTextOutW:=FinalFunctionAddress(@TextOutW);
if @OldExtTextOutA=nil then
@OldExtTextOutA:=FinalFunctionAddress(@ExtTextOutA);
if @OldExtTextOutW=nil then
@OldExtTextOutW:=FinalFunctionAddress(@ExtTextOutW);
if @OldDrawTextA=nil then
@OldDrawTextA:=FinalFunctionAddress(@DrawTextA);
if @OldDrawTextW=nil then
@OldDrawTextW:=FinalFunctionAddress(@DrawTextW);
if @OldDrawTextExA=nil then
@OldDrawTextExA:=FinalFunctionAddress(@DrawTextExA);
if @OldDrawTextExW=nil then
@OldDrawTextExW:=FinalFunctionAddress(@DrawTextExW);
if @OldTabbedTextOutA=nil then
@OldTabbedTextOutA:=FinalFunctionAddress(@TabbedTextOutA);
if @OldTabbedTextOutW=nil then
@OldTabbedTextOutW:=FinalFunctionAddress(@TabbedTextOutW);
if @OldPolyTextOutA=nil then
@OldPolyTextOutA:=FinalFunctionAddress(@PolyTextOutA);
if @OldPolyTextOutW=nil then
@OldPolyTextOutW:=FinalFunctionAddress(@PolyTextOutW);
if @OldGetTextExtentExPointA=nil then
@OldGetTextExtentExPointA:=FinalFunctionAddress(@GetTextExtentExPointA);
if @OldGetTextExtentExPointW=nil then
@OldGetTextExtentExPointW:=FinalFunctionAddress(@GetTextExtentExPointW);
if @OldGetTextExtentPoint32A=nil then
@OldGetTextExtentPoint32A:=FinalFunctionAddress(@GetTextExtentPoint32A);
if @OldGetTextExtentPoint32W=nil then
@OldGetTextExtentPoint32W:=FinalFunctionAddress(@GetTextExtentPoint32W);
if @OldGetTextExtentPointA=nil then
@OldGetTextExtentPointA:=FinalFunctionAddress(@GetTextExtentPointA);
if @OldGetTextExtentPointW=nil then
@OldGetTextExtentPointW:=FinalFunctionAddress(@GetTextExtentPointW);
@ConvertTextFunction:=@ConvertFunction;
procedure UnhookTextOut;
begin
If @OldTextOutA<>nil then begin
PatchAddress(@NewTextOutA, @OldTextOutA);
PatchAddress(@NewTextOutW, @OldTextOutW);
PatchAddress(@NewExtTextOutA, @OldExtTextOutA);
PatchAddress(@NewExtTextOutW, @OldExtTextOutW);
PatchAddress(@NewDrawTextA, @OldDrawTextA);
PatchAddress(@NewDrawTextW, @OldDrawTextW);
PatchAddress(@NewDrawTextExA, @OldDrawTextExA);
PatchAddress(@NewDrawTextExW, @OldDrawTextExW);
PatchAddress(@NewTabbedTextOutA, @OldTabbedTextOutA);
PatchAddress(@NewTabbedTextOutW, @OldTabbedTextOutW);
PatchAddress(@NewPolyTextOutA, @OldPolyTextOutA);
PatchAddress(@NewPolyTextOutW, @OldPolyTextOutW);
PatchAddress(@NewGetTextExtentExPointA, @OldGetTextExtentExPointA); PatchAddress(@NewGetTextExtentExPointW, @OldGetTextExtentExPointW); PatchAddress(@NewGetTextExtentPoint32A, @OldGetTextExtentPoint32A); PatchAddress(@NewGetTextExtentPoint32W, @OldGetTextExtentPoint32W); PatchAddress(@NewGetTextExtentPointA, @OldGetTextExtentPointA); PatchAddress(@NewGetTextExtentPointW, @OldGetTextExtentPointW); end;
end;
initialization
finalization
UnhookTextOut;
end.
===================================================
unit PEStuff;
interface
uses Windows;
type
PImageDosHeader = ^TImageDosHeader;
_IMAGE_DOS_HEADER = packed record { DOS .EXE
header }
e_magic: Word; { Magic
number }
e_cblp: Word; { Bytes on last page of file }
e_cp: Word; { Pages in
file }
e_crlc: Word; {
Relocations }
e_cparhdr: Word; { Size of header in
paragraphs }
e_minalloc: Word; { Minimum extra paragraphs needed }
e_maxalloc: Word; { Maximum extra paragraphs needed }
e_ss: Word; { Initial (relative) SS value }
e_sp: Word; { Initial SP
value }
e_csum: Word; {
Checksum }
e_ip: Word; { Initial 上一页 [1] [2] [3] [4] [5] [6] 下一页
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