skybirdsoar/libobf

Forcing Weak Obfuscation Onto Developers™

libobf

Forcing Weak Obfuscation Onto Developers™

libobf encourages and supports the use of non-alphanumeric letters to obfuscate code.

Note: Your code is difficult to read, but very easy to deobfuscate.

Examples

Example: Run-length encoding

_m = %i[to_s partition empty? unshift map]
_=$-o[?.][_,_m[0]]
a =->_{$-o[?.][_,_m[1],%r{(.)\1{0,}}]}
b =->_{$-o[?.][_,_m[2]]? []:(_=a[_];$-o[?.][b[_[$-o[?-]+$-o[?-]]],_m[3],_[$-o[?-]]])}
$-o[?+][b[_],[_m[4], ->_{[_[$-o[?_]],$-o[?.<<?.][$-o[?s<<??],_]]}]]

...and decoding

$-o[?.][_,:reduce,$-o[?s],->_,__{_+(__[$-o[?_]]*__[$-o[?-]])}]

More examples are available in examples/

Tips and Tricks

1. Even and Odd

number&1

If number&1 is 0, it is even If it is 1, it is odd.

It can be used like this:

number&1<1?even:odd

2. Calling $-o

For 2 characters+ keys, there are different ways to call them.

$-o[?.<<?.]
$-o['..']
$-o[%[..]] # and other %sym
$-o[%q[..]]
$-o[$-o[?s]+'..']
# etc

3. Obfuscating method calls

libobf provides methods for you to obfuscate your method names! Just fire up IRB and obfuscate your methods names!

irb> require 'libobf'
  => true
irb> $-o[?[]["map"]
  => (obfuscated)

Copy and paste them into source and you are ready to go!

m = [(obfuscated), (obfuscated), (obfuscated)]
Object.send($-o[?:][m[0]])

If you are lazy, you can also just map(&:$-o[?:]) over m

4. More method calling obfuscation

Ruby allows us to call [] using the ol' way, so let's do it!

$-o.[](?+).[](Kernel, [:puts, "hello"])