ClosedPort22

Export Google Authenticator secret OTP-keys

I recently got myself a Yubikey and wanted to set up the Yubico Authenticator with all the OTPs I had in Google Authenticator. Unfortunately Yubico Authenticator doesn't support scanning the QR-code that the Google Authenticator generates when you export the OTP-keys, and it seemed like quite the daunting task to log in to every service to generate new OTP-keys. So I decided to have a look at the contents of the QR code, to see if I could import the keys into Yubico Authenticator in one go. Luckily I found a blog post by Alex Bakker that describes the data format.

Transfer QR-code to computer

Unfortunately, but likely for the best, the security policy of Google Authenticator won't allow you to take a screenshot of

Resize Ghidra for High DPI screens

If you run Ghidra on a high DPI screen, you will probably find the GUI to be scaled down so small to be almost of no use.

There is a setting that you can adjust to scale the Ghidra GUI:

in $GHIDRA_ROOT/support is a file named launch.properties. In this launch.properties file is the following configuration key:

VMARGS_LINUX=-Dsun.java2d.uiScale=1

mcd

Make and Change Directory

mkdir && cd

It's an often used pattern when setting up to first make a directory with mkdir and then immediately moving into the new directory with cd.

mkdir my_dir
cd my_dir

	global
	lua-load /path/to/haproxy_minecraft.lua
	[...]

	defaults
	[...]

	frontend mc_listener
	bind *:25565
	mode tcp

	#
	# How to do domain fronting in Python with Requests.
	#
	# Send a request to an arbitrary IP address and force the
	# SNI field and Host HTTP header to a certain value.
	#
	import http.client

	import requests
	import urllib3

	swagger: '2.0'

	info:
	title: "Pixiv App API"
	description: "Unofficial API specification extracted from Pixiv Android App v5.0.17"
	version: "1.0"

	host: app-api.pixiv.net
	schemes:
	- https

	#
	## aria2 config
	#
	# man page = http://aria2.sourceforge.net/manual/en/html/aria2c.html
	# file path = $HOME/.aria2/aria2.conf

	# Download Directory: specify the directory all files will be downloaded to.
	# When this directive is commented out, aria2 will download the files to the
	# current directory where you execute the aria2 binary.
	#dir=/some/download/