doegox’s gists

doegox / fingerprint_mfc.py

Created September 10, 2024 20:22

Crappy script for fingerprinting MFC cards

doegox / ECDSA_public_key_recovery.py

Created September 16, 2020 14:36

Public Key Recovery from the ECDSA Signature

	#!/usr/bin/env python3

	# Example from https://cryptobook.nakov.com/digital-signatures/ecdsa-sign-verify-examples
	# updated to latest pycoin & OpenSSL APIs (2020-09)
	# pip install --user pycoin
	# pip install --user secrets

	from pycoin import intbytes
	from pycoin.ecdsa.secp256k1 import secp256k1_generator
	import hashlib, secrets

doegox / hf-mf-A2D9B91E-dump.eml

Last active July 10, 2020 22:09

PoC MFC image being also a ZIP and a PDF

	A2D9B91EDC88040044C2770731343938
	00000000000000000000000000000000
	00000000000000000000000000000000
	FFFFFFFFFFFFFF078069FFFFFFFFFFFF
	00000000000000000000000000000000
	00000000000000000000000000000000
	00000000000000000000000000000000
	FFFFFFFFFFFFFF078069FFFFFFFFFFFF
	00000000000000000000000000000000
	00000000000000000000000000000000

doegox / example.txt

Created July 18, 2019 20:41

Crappy script to get some stats on Proxmark3 FW

	proxmark3-RRG.git$ ./show-sizes.sh
	Bootphase1 @00000: 512/512
	Bootphase2 @00200: 3488/7680 = 45.4167%
	Text+Data @02000: 234576/253952 = 92.3702%
	234576/516096 = 45.452%

	10 largest .text:
	=================
	text data bss dec hex filename
	21339 166 132 21637 5485 armsrc/obj/iso14443a.o

doegox / test-flash.sh

Last active August 1, 2019 09:19

Testing script for Proxmark3 RDV4 external flash

	#!/bin/bash

	for ((i=0; i<100; i++)); do
	echo -e "\n\nIteration $i"
	rm -f test_flash_in.bin test_flash_out.bin
	dd if=/dev/urandom of=test_flash_in.bin bs=65536 count=3
	./proxmark3.sh -c "
	mem wipe p 0;
	mem wipe p 1;
	mem wipe p 2;

doegox / troopers2019_img2badge.py

Last active April 16, 2019 04:18

Image to badge shitty script, with script helper for uploading it directly on the badge via USB

	#!/usr/bin/env python3
	# TROOPERS2019
	# @doegox
	# The script will resize the image and convert it to BW image if needed but
	# I would advise to do it yourself first with e.g. Gimp for a better control
	# of the aspect ration and the BW threshold.
	# Target: 296x128, black & white (no grey)


	# Shall we display the result locally?

doegox / notmydigest.cpp

Created October 20, 2017 19:08

Write-up of the Hack.lu 2017 CTF challenge "Not My Digest"

	/*
	MIT License

	Copyright (c) 2017:
	Marc Stevens
	Cryptology Group
	Centrum Wiskunde & Informatica
	P.O. Box 94079, 1090 GB Amsterdam, Netherlands
	[email protected]

doegox / RPi3_readonly.sh

Created September 11, 2017 00:10

Commands to make a RPi3 read-only

	# From https://hallard.me/raspberry-pi-read-only/
	# DON'T APPLY IT BLINDLY! USE IT AS A GUIDE

	apt-get install -y busybox-syslogd; dpkg --purge rsyslog
	sed -i 's/rootwait/rootwait fastboot noswap ro/' /boot/cmdline.txt
	rm -rf /var/lib/dhcp/ /var/run /var/spool /var/lock /etc/resolv.conf
	ln -s /tmp /var/lib/dhcp
	ln -s /tmp /var/run
	ln -s /tmp /var/spool
	ln -s /tmp /var/lock

doegox / st_srx.c

Created August 31, 2017 23:37

LIBNFC: Quick start example that presents how to discover a ST SRx tag

	/**
	* @file st_srx.c
	* @brief Quick start example that presents how to discover a ST SRx tag
	*/

	// To compile this simple example:
	// $ gcc -o st_srx st_srx.c -lnfc

	#include <stdlib.h>
	#include <nfc/nfc.h>

doegox / gh16_stego200.py

Last active November 23, 2016 15:20

GreHack 2016 CTF Daytonaaaaaaaaaa!!!!! write-up

Philippe Teuwen doegox