Protection - obfuscating and masking routines <- get
'em while th 2003-12-12 - By Barry Swan
Back
Stuff I'm working on.
Works for me, although your mileage may vary because they are written
for my coding style.
http://www.theburrow.co.uk/d85/obfuscator121203.zip <- 25k
The file contains a random behaviour of mine you can test on - just type
Obfuscate()
And
Maskfunctions()
In the message window. Or for 'fun', try Obfuscate(TRUE) instead. It's
'wacky' :/
To get 'em to work in your own movies, copy the reserved word list and
script into your movie, and run the routines.
The obfuscate routine DOES NEED TWEAKING - you'll be bloody lucky to
have it work straight out of the box.
As an example, here's the tags I needed in my FPS game to get it to
work:
-- ---- --> IGNORES
-- OBFUSCATE ignore 'register'
-- OBFUSCATE ignore 'move_cursor'
-- OBFUSCATE ignore 'l, o, c, d, r'
-- OBFUSCATE ignore 'shaders, p, s, q, v, t, b, l'
-- OBFUSCATE ignore 'view, lighting, scenery, effects, filtering,
renderformat, detail, brightness, modeldetail'
-- OBFUSCATE ignore 'misc, music, target'
-- OBFUSCATE ignore 'layout'
-- OBFUSCATE ignore 'standard'
-- OBFUSCATE ignore 'join, joins, entities, block, blocks, models, root,
plan, b_wp, b_sp'
-- OBFUSCATE ignore 'north, east, south, west'
-- OBFUSCATE ignore 'mml_trigger, t, tn'
-- OBFUSCATE ignore 'keys, mouse'
-- OBFUSCATE ignore 'up, down, left, right, strafeleft, straferight,
jump, fire'
-- OBFUSCATE ignore 'leftmousebutton, rightmousebutton, sensitivity'
-- OBFUSCATE ignore 'active, on, off'
Basically anything (well, property list-wise) that came from a
non-script source (preference file and fields loading data).
Now I've tweaked it a bit, it does my entire game in under 30 seconds,
so it's quick enough just to have a play with.
It's up to you if you do a recompile all scripts afterwards, I'd
probably recommend it. For behaviours just make sure you choose to keep
current values, and don't reset 'em.
The maskfunction routine should be simple enough to tweak what does or
doesn't get masked in each script type, and of course you can set what
you want to happen when masked functions are called - I'm using the
'guaranteed crash' line courtesy of our very own Rasmus - cheers, it's
good to pick up tips on how to annoy people!
Special thanks to Rasmus and Robert for their input and time while I was
covering my security thing.
Shame we still haven't come up with a definitive reserved word list, but
my code has routines to make adding new-found ones easy enough.
BACK UP BACK UP BACK UP before you use either - they OVERWRITE YOUR
ORIGINAL SCRIPTS - pay careful note especially if you use external
scripts!
DO NOT USE MASKFUNCTIONS BEFORE YOU OBFUSCATE. Obfuscate uses some of
the features that MaskFunctions covers, so if you DO do it in the wrong
order, expect Director to crash.
Any / all feedback / improvements / bug-fixes just let me know - the
code is 'freeware' as it goes, 'cos the protection thing is something
close to a lot of our heartson this list, be it anti-hack or simple DCR
theft-protection.
Barry
gerbil@(protected)
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