Essential Python Libraries for Hackers and Security Researchers
Native Libraries Most up-to date reference for important native libraries is the official documentations. Since all native libraries are equally… more
Notes of a Java Geek Learning Python - Language Reference Review
This post consists of quick notes taken while going through “Python 3 - Language Reference”. Please note that this is… more
Using Raspberry Pi to Program BLE400 / NRF51822
Connect the BLE400 according to diagram shown in: https://rlangoy.github.io/OpenOCD_MBED_FRONTEND/HWExample.htm RPi GPIO PIN 24 to SWDIO (SWD, pin7) RPi GPIO PIN… more
SSO Salesforce with WSO2 Identity Server using OpenID Connect
This post summarizes steps relevant to configuring OpenID Connect based SSO with Salesforce using WSO2 Identity Server as the Identity… more
Analyzing Network Traffic with OpenWrt
Please go through “Getting Started with OpenWrt - Linuxfying Routers” if you are new to OpenWrt. I will be using the… more
Getting started with OpenWrt - Linuxfying Routers
I just got myself a GL-MT300A (GL.iNet) mini router. GL.iNet routers have OpenWrt pre-installed, unlike other mini routers with which you have to… more
CVE Probe — Apache Tomcat — CVE-2016–0706
Apache Tomcat disclosed CVE-2016–0706 on 02/24/2016 with below overview : Apache Tomcat 6.x before 6.0.45, 7.x before 7.0.68, 8.x before 8.0.31,… more
Man in the Middle Attack — Lab Setup with VirtualBox
Man in the Middle (MitM) attack concept has been around for a long time and it dates back even to 1981,… more
Swagger Core Jersey 2 - Empty API listing / Resources not listed
Recently, I tried following “Swagger-Core-Jersey-2.X-Project-Setup-1.5” guide. After doing everything correct, identified that “swagger.json” file does not contain API listing. Output… more
{jaggery.js} Enabling Java Security Manager in Jaggery
This post summarizes steps relevant to enabling Java Security Manager in Jaggery server. Steps are summarised for using default keystore to… more
Homebrew Home Automation
First sensor node as well as most of the work relevant to hardware prototype of my homebrew home automation system… more
WSO2 ESB Walk-through - S̶h̶o̶r̶t̶e̶s̶t̶ Smartest Path
WSO2 Enterprise Service Bus is a lightweight, free and open source product with 100+ ready-made connectors [1], which is being… more
DIY 3D printer - Building RepRap Prusa i3 in Sri Lanka (work in progress)
This post summarizes building a RepRap Prusa i3 3D printer here in Sri Lanka, with my father’s help as well (who… more
GY-GPS6MV2 - NEO6MV2 (Neo 6M) GPS Module with Arduino / USB TTL
Ublox Neo 6M (Ublox NEO6MV2) is a I2C compliant GPS module. This post discusses details on wiring Ublox Neo 6M… more
Installing latest Wireshark on Ubuntu / Linux (Build from source)
Note that even though this article discusses building Wireshark from the source and relevant installation steps, same can be applied… more
SIM800 - Controlling Arduino with SMS (IoT Backup Route)
This post further discusses on extracting commands sent to an Arduino in form of an SMS, using SIM800 module. Discussed… more
Quickstart SIM800 (SIM800L) with Arduino
SIM800 is one of the most commonly used GSM module among hobbyists and Arduino community. Even though AT command reference… more
Modular Web Applications with OSGi - Part 2 - Dynamic Web Resources
This is part 2 of a series of posts regarding developing modular Java web applications with OSGi. Please go through… more
Modular Web Applications with OSGi - Part 1- Modules and Dynamic Menus
This is beginning of a series of posts regarding developing modular Java web applications with OSGi. I must add that… more
Android R not regenerating
Recently, I had to face few strange problems in regenerating R.java file after clean building an Eclipse based Android project.… more
Samsung Note 2 - Updating to Android 4.3 Stock ROM and Re-rooting Guide
Below steps were tested with Samsung Note 2 (GT-N7100) running Android 4.1.2 having PDA N7100XXDMB5 / baseband N7100XXDLK7. After the… more
Malware Analyzer for Android ( Anubis, NVT, URLVoid & Comodo, All in One )
I have always been a fan of Anubis binary analyzer, though I prefer Sandboxie in some serious situations. As Anubis… more
Yii Vertical Operations Menu (CMenu)
Yii framework provides a nice, dynamic “Operations Menu” with CRUD views generated by Gii application. In one of my projects… more
XSS (Cross-site scripting)
Cross-site scripting is a vulnerability that exists in many web applications. It is rated as a top threat for web… more
Fetch-execute cycle and impact of operation types.
What is a fetch-execute cycle in a processor. Conventional processor consist five units called ALU, Controller, Internal Storage, Internal Interconnections… more
Guessing Game in Assembly
This assembly language program is designed to create a very simple game where user is allowed to guess a hard… more
Coupling, Loosely Coupling and Tightly Coupling
Coupling refers to dependencies that exists between two things. Consider two classes for an example. If one class is highly… more
Keeping broadband connection alive (avoid frequent disconnects)
(Keep Alive, Wireless Broadband Connections) If you are using HSDPA, WCDMA, EDGE, 3G or such wireless broadband connections, you might… more
CPU Scheduling
Introduction to multiprogramming In the early days of computer science, a computer could run only one program at a time.… more
Endless looping of packets in TCP/IP networks (Routing Loops)
How endless looping of packets in a TCP/IP network might occur? Router is a device used to interconnect two or… more
Address Space of IPv4 and IPv6
Introduction to IP Addresses When ARPANET was launched in year 1969, Network Control Protocol (NCP) was used to facilitate communication… more
Static Data Structures vs. Dynamic Data Structures
With the daily evolution of information technology, computer is used for many purposes than it was used to. So that,… more
Endian mismatch
Basically, “byte ordering” refers to the order that is used while storing sequence of bytes in computer memory. Two major… more
Essentials of Counter-Controlled Repetition
What is “Counter-Controlled Repetition” ? Counter-Controlled Repetition which seems bit ruff at the first sight is nothing but a simple… more
Get FREE Symbian OPDA Developer Certificate (Update - 2009 Nov) - required to hack Nokia N97, 5800 & More
NOTE This article is quite old and English site of opda.cn seems to be down at the moment. However you… more
Happy Birth Day Firefox!
It’s the fifth B’Day of my favorite web browser, Firefox. Honestly, I’m so proud to be a part of it.… more