geekman’s gists

geekman / get-password.ps1

Last active January 29, 2025 14:56

minimal PowerShell code to retrieve passwords from Windows Credentials

	#
	# PowerShell script to read out generic Windows Credentials
	# this is kinda like macOS Keychain, but for Windows
	#
	# darell tan 2021.04.08
	#

	[String] $CredNativeCode = @"

	using System;

geekman / decrypt-pdf.cmd

Created January 18, 2021 08:42

permanently decrypts PDFs with qpdf

	:: permanently decrypts PDFs and places them into the parent directory
	for %f in (C:\dir\encrypted\*.pdf) do ^
	qpdf.exe --decrypt --password=secretdoc "%f" "%~dpf..\%~nxf"

geekman / normalize-f32le.go

Created November 4, 2020 15:27

Normalizes a float32 LE raw file

	//
	// Normalizes a float32 little-endian raw file to the first few averaged values.
	// The averaged values will be treated as the baseline and all values in the
	// file will be relative to that.
	//
	// 2020.11.04 darell tan
	//

	package main

geekman / qrcode.min.js

Created October 16, 2020 03:37

printable QR WiFi credentials generator (self-contained & offline)

/*! qrcode-svg v1.0.0 | https://github.com/papnkukn/qrcode-svg | MIT license */

function QR8bitByte(t){this.mode=QRMode.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,r=this.data.length;e<r;e++){var o=[],n=this.data.charCodeAt(e);n>65536?(o[0]=240|(1835008&n)>>>18,o[1]=128|(258048&n)>>>12,o[2]=128|(4032&n)>>>6,o[3]=128|63&n):n>2048?(o[0]=224|(61440&n)>>>12,o[1]=128|(4032&n)>>>6,o[2]=128|63&n):n>128?(o[0]=192|(1984&n)>>>6,o[1]=128|63&n):o[0]=n,this.parsedData.push(o)}this.parsedData=Array.prototype.concat.apply([],this.parsedData),this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function QRCodeModel(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}function QRPolynomial(t,e){if(void 0==t.length)throw new Error(t.length+"/"+e);for(var r=0;r<t.length&&0==t[r];)r++;this.num=new Array(t.length-r+e);for(var o=0;o<t.length-r;o++)this.num[o]=t[o+r]}functi

geekman / ax3600_led_show.sh

Created July 29, 2020 16:08

"runway lights" for the Xiaomi AX3600 router

	#!/bin/sh

	PREV=
	while :; do
	for a in led_blue net_blue led_ant led_yellow net_yellow led_ant; do
	[ -n "$PREV" ] && echo 0 > /sys/class/leds/$PREV/brightness
	echo 1 > /sys/class/leds/$a/brightness
	PREV=$a
	sleep 1
	done

geekman / fixup-posts.py

Created June 10, 2020 14:43

script to fix up blog post markdown files

	#
	# rewrite blog posts front matter to fix date format and title
	# 2020.05.26 darell tan
	#

	import re
	import os
	import sys
	import time

geekman / rpmdump.go

Created May 30, 2020 11:33

RPM file dumper, adapted from https://github.com/holocm/holo-build

	/*******************************************************************************
	*
	* RPM File Dumper
	* Adapted to run as a self-contained binary from Holo:
	* https://github.com/holocm/holo-build
	*
	* 2020.05.30 darell tan
	*
	* Copyright 2015 Stefan Majewsky <[email protected]>
	*

geekman / ida-analysis.py

Last active March 10, 2022 08:31

simple IDAPython script for scripting automated binary analysis

	#
	# ida-analysis.py
	# a simple IDAPython binary analysis script
	# 2020.05.24 darell tan
	#
	# invoke with:
	# idat64 -c -A -S"ida-analysis.py $HOME/analysis.txt" <file.bin>
	#

	import sys

geekman / dump_config.sh

Created May 14, 2020 08:33

snippet to look for effective config lines in config files

	# look for non-commented, non-empty lines
	grep -v '^\s$#.$\?$' /etc/someconfig

geekman / gen-link.sh

Created April 25, 2020 09:37

generate systemd network link files to avoid "s0" prefixes

	#!/bin/sh
	#
	# generate systemd .link files for "enpX" devices
	# i don't like the "s0" suffix because it's useless
	#
	# 2020.04.25 darell tan
	#

	umask 022

	# look for non-commented, non-empty lines
	grep -v '^\s\(#.\)\?$' /etc/someconfig