Re: Decrypting Lua 5.0 Bytecode

[Kein-Hong Man <mkh@...>]

Alias Zero wrote:
> C:\PSP\GTA\LUASCRIPTS\ChunkSpy-win32-bin-0.9.7\5.0.2>chunkspy.exe DEFENDTHEBASE.
> LUA.LC DEFENDTHEBASE.LUA.LC -o DEFENDTHEBASE.lst
> ChunkSpy: A Lua 5.0.2 binary chunk disassembler
> Version 0.9.7 (20050605)  Copyright (c) 2004-2005 Kein-Hong Man
> The COPYRIGHT file describes the conditions under which this
> software may be distributed (basically a Lua 5-style license.)
>
> * Run with option -h or --help for usage information
> ChunkSpy:1127: mismatch in number size (needs 8 but read 4)

It means Lua_Number is probably an int or a float. By default, 
ChunkSpy dies when the chunk header does not match that of the 
host platform. However, look at the help options. Read the README 
file too. The '--auto' option might work; ChunkSpy can decode 
different Lua_Number types (but that has not been extensively 
tested.)

Do note that ChunkSpy works only for standard 5.0.2 at the moment 
(I am testing a 5.1 update) so if the format used in the files you 
want to decode is non-standard, you will need to modify ChunkSpy 
itself, i.e. you are on your own. If you are not familiar with how 
binary chunks are put together, try reading: 
ANoFrillsIntroToLua5VMInstructions.pdf

HTH,
--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia