Well this year i decided to enter the International Obfuscated C Code Contest. This was my first attempt at writing obfuscated C (at least purposely), so I am sure that this is kids-stuff for the real obfuscation gurus. Anyway, the results are out, and I am not a finalist (I wasn't expecting to be), so I figured I would share my code with you all, just for fun. If anyone else made an entry this year, please share them!
Here are the remarks included with my entry:
This program grew out of a non-obfuscated utility that I threw
together a while ago. I use it as a reference from time to
time since different architectures produce different results (at
least, the output is different on my HP-UX box than it is on my
Intel box). It simply outputs a nicely formatted ascii character
table. It is run with no arguments and produces its report on
the standard out. I achieved obfuscation by using a couple of
levels of recursion, plus some confusingly named variables and
functions. I also included some additional code which does
absolutley nothing just to confuse things a little more.
I strived for "-Wall" cleanness. As a result I had to give up
a couple minor obfuscations, but I think it is still sufficiently
convoluted. This is my first attempt at obfuscated C -- it was
written over the course of several weeks as a diversion. By
the end it became very difficult to improve as I could no longer
understand how it worked without a serious amount of thought!
The code is neatly arranged in the form of my initials.
Code:
# include <stdio.h>
# define d (
# define I1 1<<
# define b )
# define Il(l) \
return(l)
# define lI \
I*((I1 3)-1)+(I*(I1\
1))-(I-\
(I1 4))
#define \
_l(l) \
ll_l(l)
#define \
ll(l) l
#define \
l1 main(
long i,l,ll(I)=d(I1 5)-(I1 1)b;int _l(l)
{putchar d ll(l)b;Il(l);}int II(l,L){_l(
(l/L)+48);l-=((l/L)*L);d L/=10 b?II(l,L)
:0;Il(l);}int l1
b{*d d l b?&I:&l
b=I;if d l>(I1 8
b b Il(I1 0);_l(
32);_l(I1 5);II(
l,25<<2);_l(58);
_l(I1 5);_l(ll(l
));l%(I1 2)?0:_l
((I1 3)+(ll(I1 1)
)b;l++;Il(l1 l));
}
ello, I am trying to remove obfuscated code in multiple files on a server, the malicious code is surronded by
/*km0ae9gr6m*//*qhk6sa6g1c*/
I had success removing from some files using this command
sed -i ':strt;s|/\*km0ae9gr6m\*/*/\*qhk6sa6g1c\*/||g;/\/\*km0ae9gr6m\*\//{N;b strt}'... (5 Replies)
I have this following file and I would quite like to get it decoded - any help / advice is appreciated. I would like to know how to decrypt it, however if someone is able to do it for me I would be equally grateful.
<?php
//Obfuscation provided by FOPO - Free Online PHP Obfuscator v1.2:... (6 Replies)
Obfuscated Hello World! in Python 2.7.x
This is seriously impressive:-
Obfuscating "Hello world!" - Ben Kurtovic (2 Replies)
Discussion started by: wisecracker
2 Replies
LEARN ABOUT MINIX
uuid_compare
UUID_COMPARE(3) Libuuid API UUID_COMPARE(3)NAME
uuid_compare - compare whether two UUIDs are the same
SYNOPSIS
#include <uuid.h>
int uuid_compare(uuid_t uu1, uuid_t uu2)
DESCRIPTION
The uuid_compare function compares the two supplied uuid variables uu1 and uu2 to each other.
RETURN VALUE
Returns an integer less than, equal to, or greater than zero if uu1 is found, respectively, to be lexicographically less than, equal, or
greater than uu2.
AUTHOR
Theodore Y. Ts'o
AVAILABILITY
libuuid is part of the util-linux package since version 2.15.1 and is available from https://www.kernel.org/pub/linux/utils/util-linux/.
SEE ALSO uuid(3), uuid_clear(3), uuid_copy(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_unparse(3)util-linux May 2009 UUID_COMPARE(3)
03-28-2002
Obfuscated C
