samy kamkar samyk

## Drift HD Ghost - Technical Notes and Root

Note: Please don't attempt anything here unless you are comfortable with the possibility of permanently damaging your camera. I also do not guarantee your camera is the same as mine - this is just for information and fun! It goes without saying that I take no responsibility for what you do with this information, and it will probably invalidate your warranty too.

It is reported that the firmware re-flash does not appear to disable the debug network on a Ghost S.

Most of this was found by simply running strings over publically available firmware and software, then searching around for anything interesting.
The camera runs on the Ambarella A5S chipset, which appears to run PrKERNEL (implementing uItron): http://www.esol.com/embedded/prkernelv4.html, then boots Linux as a process inside the uItron OS.
There's lots of references to BOSS in the firmware, presumably a codename for this chipset from Ambarella.
The code on the device-side is a very close im

JavaScript Crypto Libraries

List some crypto libraries for JavaScript out there. Might be a bit out dated. Scroll to the bottom.

WebCryptoAPI

http://www.w3.org/TR/WebCryptoAPI/

This specification describes a JavaScript API for performing basic cryptographic operations in web applications, such as hashing, signature generation and verification, and encryption and decryption. Additionally, it describes an API for applications to generate and/or manage the keying material necessary to perform these operations. Uses for this API range from user or service authentication, document or code signing, and the confidentiality and integrity of communications.

Often referred to as the "swiss army of knife" for TCP/IP networking, [Netcat][1] is an extremely versatile Linux utility that allows you to do anything under the sun using TCP/UDP sockets. It is one of the most favorite tools for system admins when they need to do networking related troubleshooting and experimentation.

In this tutorial, I am sharing a few useful netcat examples, although the sky is the limit when it comes to possible netcat use cases. If you are using netcat regularly, feel free to share your use case.

Note that when you are binding to well-known ports (0-1023) with nc, you need root privilege. Otherwise, run nc as a normal user.

1. Test if a particular TCP port of a remote host is open.

$ nc -vn 192.168.233.208 5000

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

This tutorial uses the "Sample hapi.js REST API" project.

Take a look at: https://github.com/agendor/sample-hapi-rest-api/

##Topics

Introduction
Installing Node.js
Installing MySQL
Setting-up the project

	function getTrilateration(position1, position2, position3) {
	var xa = position1.x;
	var ya = position1.y;
	var xb = position2.x;
	var yb = position2.y;
	var xc = position3.x;
	var yc = position3.y;
	var ra = position1.distance;
	var rb = position2.distance;
	var rc = position3.distance;

	/*
	* WS2812_SCAN.c
	*
	* Created: 10.01.2014 20:46:20
	* Author: tim
	*/

	#include <avr/io.h>

	int main(void)

	/**
	* App Endpoint API Access Example
	*
	* Author: SmartThings
	*/

	preferences {
	section("Allow Endpoint to Control These Things...") {
	input "switches", "capability.switch", title: "Which Switches?", multiple: true
	input "locks", "capability.lock", title: "Which Locks?", multiple: true

	/** A simple kalman filter example by Adrian Boeing
	www.adrianboeing.com
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <math.h>

	double frand() {
	return 2*((rand()/(double)RAND_MAX) - 0.5);

	var str = 'This is a test string.';
	// Let's replace all spaces with ','
	str = str.split(' ').join(',');