evandrix evandrix

## pep20_by_example.py
#!/usr/bin/env python

"""
=====================================
PEP 20 (The Zen of Python) by example
=====================================

Usage: %prog

:Author: Hunter Blanks, hblanks@artifex.org / hblanks@monetate.com

## README.md

      
              1 file
            
          
              61 forks
            
          
              17 comments
            
          
              259 stars
            
          
                evandrix
                / README.md
            
            
              Created
              September 11, 2012 00:06
            
              
                Headless web browsers
              
          
    Here are a list of headless browsers that I know about:

[HtmlUnit][1] - Java. Custom browser engine. JavaScript support/DOM emulated. Open source.
[Ghost][2] - Python only. WebKit-based. Full JavaScript support. Open source.
[Twill][3] - Python/command line. Custom browser engine. No JavaScript. Open source.
[PhantomJS][4] - Command line/all platforms. WebKit-based. Full JavaScript support. Open source.
[Awesomium][5] - C++/.Net/all platforms. Chromium-based. Full JavaScript support. Commercial/free.
[SimpleBrowser][6] - .Net 4/C#. Custom browser engine. No JavaScript support. Open source.
[ZombieJS][7] - Node.js. Custom browser engine. JavaScript support/emulated DOM. Open source.
[EnvJS][8] - JavaScript via Java/Rhino. Custom browser engine. JavaScript support/emulated DOM. Open source.


## gist:1130954
@ http://altdevblogaday.com/2011/08/06/demise-low-level-programmer/

Floating Point Numbers
They are very useful but often used in situations where they simply don’t suit the solution the programmer is attempting to write. The following links should provide some background and info on where they are not so useful, what the pitfalls are and sometimes even how to avoid them.
http://www.cprogramming.com/tutorial.html#fptutorial
http://www.johndcook.com/blog/2009/04/06/numbers-are-a-leaky-abstraction/
http://www.codeproject.com/KB/recipes/float_point.aspx
http://drdobbs.com/184402741?pgno=4
http://users.tkk.fi/jhi/infnan.html

## gist:1901352
Stripe CTF - Work Notes
mpetrov (petrov.michael@gmail.com)

These notes are very rough. They should give a general idea of how each level was solved.

---- LEVEL 01 (login: e9gx26YEb2) -----
Solution: modifying PATH env variable
Password: kxlVXUvzv

date.c

## invsqrt.c
float InvSqrt(float x){
   float xhalf = 0.5f * x;
   int i = *(int*)&x; // store floating-point bits in integer
   i = 0x5f3759d5 - (i >> 1); // initial guess for Newton's method
   x = *(float*)&i; // convert new bits into float
   x = x*(1.5f - xhalf*x*x); // One round of Newton's method
   return x;
}

## AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8"/>

    <uses-permission android:name="android.permission.READ_CONTACTS" />

    <application android:label="@string/app_name">

## exploit
Writing to Memory
Exploiting format string vulnerabilities is all about providing input that uses a format character that expects its value to be passed by reference and you control that reference. I used ‘%s’ to read from memory. I’m going to use %n to write to memory.

%n	      Number of characters written by this printf.

Lucky for us, there is a really easy way to control the number of characters written by printf. When you specify a format character, you can optionally give it an integer for the width of the format character.

%#x	      Number of characters prepended as padding.

We can use this to control how many characters are written by printf.

## README.md

      
              5 files
            
          
              2 forks
            
          
              0 comments
            
          
              3 stars
            
          
                evandrix
                / README.md
            
            
              Created
              December 29, 2013 15:44
            
              
                Gmail API
              
          
    Gmail.js - JavaScript API for Gmail

TL;DR Summary


Lots of api methods to work with gmail. Useful for chrome extensions
Most of them dont take arguments, they work on what is currently visible on the screen
I still need to add implementation for chrome extension, works by injecting js for now
Main method is gmail.observe.on('lots_of_actions_here', callback())
Click on a method link to view more detailed docs
Create an issue/pull request for feedback, requests and fixes


## print_dir_tree.py
#! /usr/bin/env python

# tree.py
#
# Written by Doug Dahms
#
# Prints the tree structure for the path specified on the command line

from os import listdir, sep
from os.path import abspath, basename, isdir

## p438.cpp
#include <iostream>
#include <cmath>
#include <stdlib.h>
#include <cstring>

using namespace std;
/**
 * Problem 438
 *
 * Example:
	#!/usr/bin/env python

	"""
	=====================================
	PEP 20 (The Zen of Python) by example
	=====================================

	Usage: %prog

	:Author: Hunter Blanks, hblanks@artifex.org / hblanks@monetate.com
	@ http://altdevblogaday.com/2011/08/06/demise-low-level-programmer/

	Floating Point Numbers
	They are very useful but often used in situations where they simply don’t suit the solution the programmer is attempting to write. The following links should provide some background and info on where they are not so useful, what the pitfalls are and sometimes even how to avoid them.
	http://www.cprogramming.com/tutorial.html#fptutorial
	http://www.johndcook.com/blog/2009/04/06/numbers-are-a-leaky-abstraction/
	http://www.codeproject.com/KB/recipes/float_point.aspx
	http://drdobbs.com/184402741?pgno=4
	http://users.tkk.fi/jhi/infnan.html
	Stripe CTF - Work Notes
	mpetrov (petrov.michael@gmail.com)

	These notes are very rough. They should give a general idea of how each level was solved.

	---- LEVEL 01 (login: e9gx26YEb2) -----
	Solution: modifying PATH env variable
	Password: kxlVXUvzv

	date.c
	float InvSqrt(float x){
	float xhalf = 0.5f * x;
	int i = (int)&x; // store floating-point bits in integer
	i = 0x5f3759d5 - (i >> 1); // initial guess for Newton's method
	x = (float)&i; // convert new bits into float
	x = x(1.5f - xhalfx*x); // One round of Newton's method
	return x;
	}
	<?xml version="1.0" encoding="utf-8"?>
	<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	package="com.example"
	android:versionCode="1"
	android:versionName="1.0">
	<uses-sdk android:minSdkVersion="8"/>

	<uses-permission android:name="android.permission.READ_CONTACTS" />

	<application android:label="@string/app_name">
	Writing to Memory
	Exploiting format string vulnerabilities is all about providing input that uses a format character that expects its value to be passed by reference and you control that reference. I used ‘%s’ to read from memory. I’m going to use %n to write to memory.

	%n Number of characters written by this printf.

	Lucky for us, there is a really easy way to control the number of characters written by printf. When you specify a format character, you can optionally give it an integer for the width of the format character.

	%#x Number of characters prepended as padding.

	We can use this to control how many characters are written by printf.
	#! /usr/bin/env python

	# tree.py
	#
	# Written by Doug Dahms
	#
	# Prints the tree structure for the path specified on the command line

	from os import listdir, sep
	from os.path import abspath, basename, isdir
	#include <iostream>
	#include <cmath>
	#include <stdlib.h>
	#include <cstring>

	using namespace std;
	/**
	* Problem 438
	*
	* Example: