Hritik Vijay Hritik14

Postviewer - writeup

Challenge's overview

The rumor tells that adm1n stores their secret split into multiple documents. Can you catch 'em all? https://postviewer-web.2022.ctfcompetition.com

The challenge consisted of an all client-side simple page, i.e. no backend code was involved. A user can upload any file which will be then locally stored in indexedDB. They can preview their files by either clicking on the title or by visiting file's URL, for example https://postviewer-web.2022.ctfcompetition.com/#file-01d6039e3e157ebcbbf6b2f7cb2dc678f3b9214d. The preview of the file is rendered inside a blob created from data: URL. The rendering occurs by sending file's contents to the iframe via postMessage({ body, mimeType }, '*')

Additionally, there is a /bot endpoint which lets players send URLs to an xss-bot imitating another user. The goal is to steal their documents.

True Color (24-bit) and italics with alacritty + tmux + vim (neovim)

This should make True Color (24-bit) and italics work in your tmux session and vim/neovim when using Alacritty (and should be compatible with any other terminal emulator, including Kitty).

Testing colors

Running this script should look the same in tmux as without.

curl -s https://gist.githubusercontent.com/lifepillar/09a44b8cf0f9397465614e622979107f/raw/24-bit-color.sh >24-bit-color.sh

The right way to override any highlighting if you don't want to edit the colorscheme file directly

Generalities first

Suppose you have weird taste and you absolutely want:

your visual selection to always have a green background and black foreground,
your active statusline to always have a white background and red foreground,
your very own deep blue background.

collapsible markdown?

CLICK ME

yes, even hidden code blocks!

print("hello world!")

The following are instructions for connecting a Bluetooth device for serial communication on Arch Linux using BlueZ 5.31.

Prerequisites

The following packages are required:

bluez: bluetoothd
bluez-utils: bluetoothctl, rfcomm

This configuration is not maintained anymore. You should think twice before using it, Breaking change and security issue will likely eventually happens as any abandonned project.

	#!/usr/bin/env python3
	# esc-pos-image.py - print image files given as command line arguments
	# to simple ESC-POS image on stdout
	# scruss - 2014-07-26 - WTFPL (srsly)
	# - 2021-01-09 (made python3 compatible - tvm Carko!)

	# if you want a proper CUPS driver for a 58mm thermal printer
	# that uses this command set, go here:
	# https://github.com/klirichek/zj-58

	#!/bin/bash

	# i3lock blurred screen inspired by /u/patopop007 and the blog post
	# http://plankenau.com/blog/post-10/gaussianlock

	# Timings are on an Intel i7-2630QM @ 2.00GHz

	# Dependencies:
	# imagemagick
	# i3lock

	urlencode() {
	# urlencode <string>

	old_lc_collate=$LC_COLLATE
	LC_COLLATE=C

	local length="${#1}"
	for (( i = 0; i < length; i++ )); do
	local c="${1:$i:1}"
	case $c in