Stuart Longland sjlongland

X25519 / COSE example program

This is a demonstration program meant to nut out some details of how COSE and X25519 key exchange are supposed to work.

Requirements

pycose
python-cryptography

How does this work?

What is this?

It's a very crude script that allows two machines that share a possibly untrusted network (e.g. WiFi) to connect to each-other and establish a secure tunnel.

How does it work?

The assumption is both machines can see each-other via multicast DNS, and can send UDP traffic between each-other. If you're using a WiFi network that isolates its clients, you're out of luck.

KISS traffic dump between two connected BPQ32 stations

This is the raw hexdump obtained from socat from two station running LinBPQ32 (i386 and armv5) communicating via a virtual tunnelled serial link.

> 2024/05/05 16:16:28.000714544  length=20 from=0 to=19
 c0 01 1e c0 c0 02 40 c0 c0 03 0a c0 c0 04 03 c0 c0 05 00 c0
< 2024/05/05 16:16:28.000716883  length=9 from=0 to=8
 5e 43 c0 c0 5e 45 5e 40 c0

See https://cloudisland.nz/@xssfox/111729661516543468

Source for this spreadsheet is https://www.wia.org.au/members/bandplans/data/documents/Australian%20Band%20Plans%20200901.pdf

	CALLSIGNS ?= vk4msl ax4msl
	VARIANTS ?= empty cq-sstv morning-all afternoon-all evening-all 73-all 73-gotta-fly

	CALLSIGN ?=
	VARIANT ?=

	ifeq ($(VARIANT),)
	# VARIANT not set, iterate over VARIANTS
	.PHONY: all

	#!/usr/bin/env python3

	"""
	Dummy rigctld implementation for controlling a radio PTT signal via a GPIO
	pin.

	This is intended for devices like the NWDR UDRC-II and DRAWS boards, which
	attach to the top of a Raspberry Pi 2/3/4/5 single-board computer and provide
	control signals for PTT and COS along with an audio interface for digital mode
	operation.

	#!/usr/bin/env python3

	# Button box component, lays out buttons in a horizontal or vertical layout
	# evenly.

	# GUI stuff
	import tkinter
	from tkinter import ttk

	#!/usr/bin/env python
	# vim: ai ts=4 sw=4 sts=4 expandtab fileencoding=utf-8

	from mpd import MPDClient

	## SETTINGS
	##
	HOST = 'localhost'
	PORT = '6600'
	PASSWORD = False

	#
	# Automatically generated file; DO NOT EDIT.
	# Linux/x86 6.5.7 Kernel Configuration
	#
	CONFIG_CC_VERSION_TEXT="gcc (Gentoo Hardened 13.2.1_p20230826 p7) 13.2.1 20230826"
	CONFIG_CC_IS_GCC=y
	CONFIG_GCC_VERSION=130201
	CONFIG_CLANG_VERSION=0
	CONFIG_AS_IS_GNU=y
	CONFIG_AS_VERSION=24000

	2023-10-19 10:29:38,098 socatscraper.port14[socat-scrape.py: 50] INFO Decoded frame:
	[AX25SetAsyncBalancedModeFrame]
	header.destination = VK4MSL-4*
	header.source = VK4MSL-5
	header.repeaters =
	header.cr = True
	header.src_cr = False
	body.control = 63 (0x3f)
	body.pf = True (0x1)
	body.modifier = 47 (0x2f)