fun with masking and shifts

def chunkit(num):
    """
    retun list of 2 byte numbers
    0x12345678 = 0x78, 0x56, 0x34, 0x12
    """
    a = (num & 0xff000000) >> 24
    b = (num & 0x00ff0000) >> 16
    c = (num & 0x0000ff00) >> 8
    d = (num & 0x000000ff)
    return [d,c,b,a]

Hello Python

Hello Python, this is derived from "Ruby in 20 Minutes"1

Enter the python interpreter.
---------------------------------
Define a function that says 'hello world'.
>>> def h():
...     print "hello world"
...
>>> h()
hello world
Define a slightly more complex function that says hello to the passed name.
>>> def h(name):
...     print "Hello %s!" % name
...
>>> h('Guido')
Hello Guido!
Define a function that says hello to the world, or to the passed name.
>>> def h(name = 'World'):
...         print "Hello %s!" % name
...
>>> h()
Hello World!
>>> h('Guido')
Hello Guido!
If we want our object to remember our name, we would use a class. Enter the 'Greeter' class.
>>> class Greeter:
...         def __init__(self, name = "World"):
...                 self.name = name
...         def say_hi(self):
...                 print "Hello %s!" % self.name
...         def say_bye(self):
...                 print "Goodbye %s. Please come again." % self.name
...
>>> g = Greeter('Guido')
>>> g.say_hi()
Hello Guido!
>>> g.say_bye()
Goodbye Guido. Please come again.
>>> g.name
'Guido'
>>>g.name = 'Syn'
>>> g.say_hi()
Hello Syn!
Now for fun lets write a 'MegaGreeter' that can handle multiple names.
>>> class MegaGreeter:
...         def __init__(self, name = "World"):
...                 self.name = name
...         def say_hi(self):
...                 if isinstance(self.name, list) or isinstance(self.name, tuple):
...                         for i in self.name:
...                                 print "Hello %s!" % i
...                 else:
...                         print "Hello %s!" % self.name
...         def say_bye(self):
...                 if isinstance(self.name, list) or isinstance(self.name, tuple):
...                         print "Goodbye %s. Please come again!" % ", ".join(self.name)
...                 else:
...                         print "Goodbye %s. Please come again!" % self.name
...
>>> mg = MegaGreeter(['Guido', 'Syn', 'Ninja'])
>>> mg.say_hi()
Hello Guido!
Hello Syn!
Hello Ninja!
>>> mg.say_bye()
Goodbye Guido, Syn, Ninja. Please come again!
>>> mg = MegaGreeter()
>>> mg.say_hi()
Hello World!
>>> mg.say_bye()
Goodbye World. Please come again!
>>> dir(MegaGreeter)
['__doc__', '__init__', '__module__', 'say_bye', 'say_hi']

simple python stuff

$ ./maps.py -h
Usage: ./maps.py [-h --help] [-s --specify=arg] [-t --automatic]
Mandatory arguments to long options are mandatory for short options too.
-s --specify=ARGUMENT   print specified argument
-a --automatic          print predefined
-h --help               display this help and exit
$ ./maps.py -a
I like Yahoo maps
$ ./maps.py --automatic
I like Yahoo maps
$ ./maps.py -s amazon
I like amazon maps
$ ./maps.py -s google
Google maps is the BEST!
True that, DOUBLE TRUE!

borker.py

Silly little script to modify a file.

$ cat Xorg.0.log
<...>
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
<...>
$ borker.py Xorg.0.log
bork bork bork
$ cat Xorg.0.log
<...>
bork: (--) bork, (**) bork bork bork, (==) bork bork,
        (++) bork bork bork, (!!) bork, (bork) bork,
        (bork) bork, (bork) bork, (bork) bork bork, (??) bork.
<...>

borker.py

python command line hex calculator

This is a _really_ simple command line hex calculator. Mostly just learning more python.

$ ccalc.py 0xa+5
15 0xf 0o17 0b1111
$ ccalc.py 0xa + 5
15 0xf 0o17 0b1111

ccalc.py

wwmii

I recently switched from ion3 to wmii for a change. I really enjoy it. Among other things, you can use whatever programming language you like to customize your setup.

I wrote a python script to give me a little more status for my system. Here is what it does.

$ status.py
--{ *AC* 99% + 81% on + 0.70 0.52 0.45 + N/A 00 + Mon 2007-04-09 11:45:23 MST }--

status.py

simple python brute force script

This is a simple python script to brute force a buffer.

#!/usr/bin/python
# simple buffer brute force tool
# syndrowm 2007-03-16

import sys
import os

def usage():
        print 'Usage: %s <program> [lower] [higher]' % sys.argv[0]
        sys.exit(0)

if len(sys.argv) - 1 < 1:
        usage()

try:
        program = sys.argv[1]
        lower = int(sys.argv[2])
        higher = int(sys.argv[3])
        higher = higher + 1
except:
        print 'Using default range 1 100'
        lower = 1
        higher = 101

if (os.access(program, os.X_OK)) != 1:
        print '%s does not exist' % program
        usage()

n = range(lower,higher)

for x in n:
        b = "A"*x
        #print x, b
        e = os.system('%s %s' % (program, b))
        if e != 0:
                if e == 139:
                        print x, e, "Segmentation fault \m/:(|)\m/"
                else:
                        print x, e, "Unknown"
...
dsl@0[exploitmes]$ brute.py                   
Usage: brute.py  [lower] [higher]
dsl@0[exploitmes]$ brute.py ./01_exploitme01 256 290
268 139 Segmentation fault \m/:(|)\m/
269 139 Segmentation fault \m/:(|)\m/

user input in python

#!/usr/bin/env python

import sys

min = 1

if len(sys.argv) - 1 < 1:
        while 1:
                num = raw_input("Please enter something: ")
                if len(num) > 0:
                        break
else:
        num = sys.argv[1]
print "You entered:", num