rgov’s gists

rgov / index.html

Last active August 9, 2019 20:14

	<!DOCTYPE html>
	<html>
	<head>
	<title>Map demo</title>

	<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" />
	<script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>

	<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.draw.css" />
	<script src="https://unpkg.com/[email protected]/dist/leaflet.draw-src.js"></script>

rgov / shelldiff.sh

Created May 5, 2019 19:42

	#!/bin/sh

	TMPDIR="$(mktemp -d)"

	# Capture the default shell options, before we enter POSIX mode
	set +o \| sort > "$TMPDIR/shellopts.old"
	echo "set -$-" >> "$TMPDIR/shellopts.old"
	set -o posix

	# Capture global variables

rgov / dockerize.py

Created April 25, 2019 02:24

	#!/usr/bin/env python
	# Copyright (C) 2019 Woods Hole Oceanographic Institution
	#
	# This file is part of the CGSN Mooring Project ("cgsn-mooring").
	#
	# cgsn-mooring is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 2 of the License, or
	# (at your option) any later version.
	#

rgov / cryptoscope-crack.py

Last active April 24, 2019 00:53

	#!/usr/bin/env python

	import random

	# Here is our plaintext message
	message = 'THISISATESTITISONLYATEST'

	# Insert random spaces into the message
	while len(message) < 72:
	i = random.randrange(len(message))

rgov / gist:77d71681ae3a9cee6792d90fb490dd16

Created April 16, 2019 17:09

crash course in managing a database with django-admin

	# See also:
	# https://docs.djangoproject.com/en/2.2/intro/tutorial01/

	# Install Django
	python -m pip install django


	# This creates a blank new Django project in mysite/
	django-admin startproject mysite
	cd mysite/

rgov / gist:32acd7005c175fed68e86a82d58d5b81

Created April 16, 2019 17:09

crash course in managing a database with django-admin

	# See also:
	# https://docs.djangoproject.com/en/2.2/intro/tutorial01/

	# Install Django
	python -m pip install django


	# This creates a blank new Django project in mysite/
	django-admin startproject mysite
	cd mysite/

rgov / tc32-asm.py

Created April 13, 2019 17:47

Telink TC32 instructions

	'''
	This is a list of opcodes for the TC32 MCU, as disassembled by the objdump
	binary provided (without source) with the Telink IDE.

	The format is (value, mask, assembly).

	See
	http://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=opcodes/arm-dis.c;hb=HEAD#l2508
	'''
	[

rgov / gist:f1fb93a34a6ec30fe88cf6602776b620

Created April 13, 2019 17:34

Ghidra - Dump array of structures

	# Quickly written script to enumerate an array of structures and dump them
	# as a Python object for further processing.
	#
	# This is NOT a good example of Ghidra scripting; I basically figured out
	# the API by brute force. Hopefully there is a more elegant way to do this.

	#@author Ryan Govostes
	#@category Data
	#@keybinding
	#@menupath

rgov / gist:7e1135bd697790a2d9f09308fe2aaa11

Created March 27, 2019 23:34

Z3 example of finding parameters to a CRC-16 algorithm

	import crcmod
	from z3 import *

	# This is a CRC-16 algorithm coded to be able to use Z3's symbolic types
	def crc16_py(buffer, initial, poly, xorout):
	crc = initial
	for b in buffer:
	crc = crc ^ (b << 8)
	for i in range(8):
	crc = If(crc & 0x8000 != 0, (crc << 1) ^ poly, crc << 1)

rgov / gist:cbee899187e6db489ef9a8460e8e6167

Created March 24, 2019 15:51

write to stdout after closing it?

	/* doesn't work */

	#include <fcntl.h>
	#include <stdio.h>
	#include <unistd.h>

	int main() {
	close(STDOUT_FILENO);
	if (open("/dev/null", O_WRONLY) != STDOUT_FILENO) {
	fprintf(stderr, "Could not open /dev/null as fd %d", STDOUT_FILENO);

Ryan Govostes rgov