dupuy

Markdown and reStructuredText

GitHub supports several lightweight markup languages for documentation; the most popular ones (generally, not just at GitHub) are Markdown and reStructuredText. Markdown is sometimes considered easier to use, and is often preferred when the purpose is simply to generate HTML. On the other hand, reStructuredText is more extensible and powerful, with native support (not just embedded HTML) for tables, as well as things like automatic generation of tables of contents.

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

aras-p

// Just before switching jobs:
// Add one of these.
// Preferably into the same commit where you do a large merge.
//
// This started as a tweet with a joke of "C++ pro-tip: #define private public",
// and then it quickly escalated into more and more evil suggestions.
// I've tried to capture interesting suggestions here.
//
// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

bluehat

Privacy Guide for Activists with Haters

In light of the gamergate fiasco, we realized that most of the targeted individuals had their private information trivially publicly online. Later, several authors had more immediate experience with online harassment. This guide is meant to help people take basic steps required to protect their online privacy, hopefully reducing the number of crazies who threaten to show up at your house.

We do not believe that leaving your information online means you deserve harassment, we simply wish to arm people who want to speak up with all the defensive tools available.

This guide is not an anti-government-surveillance document, as it only helps you make your information private and does not remove it. Fighting back against surveilance is a very different problem, and there is a separate guide for that.

Hiding Your Whois Data

This one should be easy, but it is the number one privacy failure w

secretsquirrel

import os
import struct
import shutil
import subprocess


class macho_intel32_shellcode():
    """
    Mach-O Intel x32 shellcode class
    """

Fuzion24

This is a brief guide on how I patched the CVE-2015-1474 for my Nexus 5 - 5.0.1. This involes downloading and building AOSP with the patch for the vuln applied. I have attached a pre-built patched version of libui.so for the Nexus5 5.0.1 in the case you are too lazy to build it yourself (and you trust me).

Building patched libui for your nexus device

repo init -u https://android.googlesource.com/platform/manifest -b android-5.0.1_r1
repo sync -j16

cd frameworks/native
# https://android.googlesource.com/platform/frameworks/native/+/38803268570f90e97452cd9a30ac831661829091%5E%21/#F0
git cherry-pick 2bc5e811a817a8c667bca4318ae98582b0ee6dc6

worawit

#!/usr/bin/python

"""
Stagefright PoC for https://android.googlesource.com/platform/frameworks/av/+/2b50b7aa7d16014ccf35db7a7b4b5e84f7b4027c
"""
from struct import pack

def create_box(atom_type, data):
    return pack("!I", len(data)+4+4) + atom_type + data

yann2192

Hardening the USB Armory

As a good crypto nerd, I usually use an entirely encrypted linux FS: / but also /boot using grub LUKS support. It's a good setup but it's not perfect, the BIOS and the bootloader are not protected.

I recently got a USBArmory and I wanted to apply the same (or a better) setup.

I found some useful links but no clear howto. So this is my setup.

Integralist

import asyncio
import time


def timeit(func):
    async def process(func, *args, **params):
        if asyncio.iscoroutinefunction(func):
            print('this function is a coroutine: {}'.format(func.__name__))
            return await func(*args, **params)
        else:

adulau

Introduction

As the Ghidra open source community is growing, trying to document the new projects around Ghidra. Feel free to fork the gist and propose improvements.

CPU support

• New 6502 language module for Ghidra
• Atmel AVR helpers for Ghidra - ATmega328p
• Processor definitions for DMG and CGB in Ghidra - Gameboy CPU (LR35902) (WiP)
• ghidra based disassembly of the x68000's IPL.