Umang's Blog

A Deep Dive into iOS Code Signing

Apple's code signing is a complex beast, consisting of several different components, each serving its own unique purpose. When I first started working on Meteorite, I found that while there were several resources detailing the internals of code signing, none of them had enough

talks

The Art of WebKit Exploitation

I have just presented my first ever talk, "The Art of WebKit Exploitation" at BSides Delhi 2019 — for those not at the conference, it's a talk about everything I've learnt exploiting the WebKit browser engine. Preparing and presenting this talk has been an amazing

security

Persistent R/W on iOS 11.2.6+

The following write-up corresponds to the hash I posted here. I will also be publishing a better write-up in the coming days. Lastly, the contents of the following write-up are under the CC-BY-SA 2.0. You're welcome to use this for whatever you wish,

code

Which framework do I choose?

Choosing a framework is not that easy. For my latest project I had to choose one, and trust me - it's difficult. There are a plethora of frameworks out there for you to take a pick from, irrespective of whatever language you core in.

code

A Day of Poking into Android

Today was the single-most crazy day in my life. I seriously doubt that I've faced worse issues before. It all began when Dad asked me to flash his Moto X (2013) back to stock from Cyanogenmod 12, due to some camera issues. I assumed

jekyll

Jekyllist

This week, I made Jekyllist. Quite simply, Jekyllist is a web UI for Jekyll. I found booting up my laptop and firing up my Git client to do something as simple writing a blog post useless. I wanted the convenience of WordPress, but the

code

Caching with Rails

While I was building Statusify, I stumbled across the power of caching, in Ruby on Rails. Here's what I did which reduced render times from 110 ms to 10 ms. Ruby on Rails provides powerful methods for caching everything - database queries, view fragments,

code

Why does the 'Open Core' model suck?

Recently, I deployed GitLab CE on a VPS. GitLab (just in case you don't know), is an amazing piece of software used for version control. Now, GitLab has two pricing models - Community Edition, which is free, and Enterprise Edition, which is paid. But