GPU610/Team AGC

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Team AGC

Team Members

1. Andy Cooc, Some responsibility
2. Gabriel Castro, Some other responsibility
3. Christopher Markieta, Some other responsibility

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Progress

Assignment 1

Andy's Findings

...

Gabriel's Findings

...

Christopher's Findings

xor_me

xor_me is an open source, brute force password cracker for doc and xls files.

xor_me was written by Benoît Sibaud and is copyrighted under the terms of the GNU Lesser General Public License version 3 only, as published by the Free Software Foundation. Here is a link to my fork of this repository:

https://github.com/Markieta/xor_me

Flat profile:

Each sample counts as 0.01 seconds.
%   cumulative   self              self     total
time   seconds   seconds    calls  Ts/call  Ts/call  name
99.35    10.58    10.58                             lclGetKey(unsigned char const*, long)
0.19     10.60     0.02                             dump_exit(int)
0.00     10.60     0.00        1     0.00     0.00  _GLOBAL__sub_I__Z9lclGetKeyPKhl

As you can see, lclGetKey is the function where I will spend most of my time trying to parallelize code.

This application is quite CPU intensive, but hasn't been optimized for multiple threads. It is using 100% of 1 thread from the 8 available on my CPU. See the list of processes below for an example.

top - 23:25:32 up  1:16,  3 users,  load average: 0.94, 0.65, 0.60
Tasks: 256 total,   2 running, 253 sleeping,   0 stopped,   1 zombie
%Cpu(s): 13.7 us,  0.7 sy,  0.0 ni, 85.5 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:   3979012 total,  3270196 used,   708816 free,   352592 buffers
KiB Swap:  4124668 total,        0 used,  4124668 free.   984048 cached Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                        
 5229 markieta  20   0   12664   1064    896 R 100.0  0.0   1:06.04 brute_force                                    
 1467 root      20   0  538620 208272 166664 S   3.7  5.2   6:55.85 Xorg                                           
 2540 markieta  20   0 1084328 169500  53460 S   3.3  4.3  11:57.88 chrome                                         
 2075 markieta   9 -11  509016   6840   4500 S   2.7  0.2   3:21.47 pulseaudio                                     
 3022 markieta  20   0 1094124  79252  10220 S   2.3  2.0   3:05.77 chrome                                         
 2932 markieta  20   0  829212  43176  19848 S   1.7  1.1   0:31.29 /usr/bin/termin                                
 2989 markieta  20   0 1039100 117292  23968 S   1.7  2.9   1:48.53 chrome                                         
 2296 markieta  20   0 1553220 170248  65592 S   1.0  4.3   3:16.43 compiz                                         
 2789 markieta  20   0 1064160  99040  20116 S   0.7  2.5   1:24.61 chrome                                         
 2993 markieta  20   0 1112596 155316  26192 S   0.7  3.9   1:31.43 chrome                                         
 3482 root      20   0       0      0      0 S   0.3  0.0   0:07.34 kworker/2:2                                    
 4364 root      20   0       0      0      0 S   0.3  0.0   0:00.96 kworker/0:0                                    
 5230 markieta  20   0   24952   1776   1176 R   0.3  0.0   0:00.14 top

I did not run this command for too long, hence the the termination ^C after about 2 minutes.

markieta@Y560:~/Documents/xor_me$ time ./brute_force 0x499a 0xcc61
Key: 499a
Hash: cc61
Password: '1950'
Password: 'w2#1'
^CState: 20:22:48:46:7e:48:62:c3c0:00000184023807d008a011c010800000:6c62477d45472100

real	2m16.888s
user	2m16.082s
sys	0m0.640s