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How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

Overview

Stable enough for my initial use-case, light-duty laptop for travel and presentations, running Linux all the time but retain a small ChromeOS volume for firmware updates and restoring settings.

1st attempt I wiped the drive and then found that when the machine attempted to suspect when the lid closed it wiped the NVRAM with no other option to boot into legacy mode than to restore ChromeOS and enable it again.

Setup base system in ChromeOS
Fully encrypted Btrfs root partition & ext4 boot
Install Arch Linux

UB-Touch installer

1- download and extract flo-newkernel-2.zip from https://github.com/ubports/ubuntu-touch/issues/300#issuecomment-450403133 2- after extracting , run the following :

fastboot flash boot flo-boot-new.img
fastboot flash recovery flo-recovery-new.img

3- download and install ubuntu-device-flash

	import requests
	import base64
	from tqdm import tqdm


	master_json_url = 'https://178skyfiregce-a.akamaihd.net/exp=1474107106~acl=%2F142089577%2F%2A~hmac=0d9becc441fc5385462d53bf59cf019c0184690862f49b414e9a2f1c5bafbe0d/142089577/video/426274424,426274425,426274423,426274422/master.json?base64_init=1'
	base_url = master_json_url[:master_json_url.rfind('/', 0, -26) + 1]

	resp = requests.get(master_json_url)
	content = resp.json()

	USER_NAME=marcy

	sed -i "s/.RSAAuthentication./RSAAuthentication yes/g" /etc/ssh/sshd_config
	sed -i "s/.PubkeyAuthentication./PubkeyAuthentication yes/g" /etc/ssh/sshd_config
	sed -i "s/.PasswordAuthentication./PasswordAuthentication no/g" /etc/ssh/sshd_config
	sed -i "s/.AuthorizedKeysFile./AuthorizedKeysFile\t\.ssh\/authorized_keys/g" /etc/ssh/sshd_config
	sed -i "s/.PermitRootLogin./PermitRootLogin no/g" /etc/ssh/sshd_config
	echo "${USER_NAME} ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
	service sshd restart

	##########
	# Win10 Optimization Script With Extra GPD Win Tweaks
	# Adapted version of https://github.com/Disassembler0/Win10-Initial-Setup-Script by Disassembler <[email protected]>
	# Author: BlackDragonBE
	# Version: v2.2.1 (2017-12-02)
	# Copied from https://www.reddit.com/r/gpdwin/comments/6ipa6c/windows_10_optimization_script_for_gpd_win/
	##########
	<#
	Copyright:

	cat >> ping << EOF
	#!/usr/bin/env bash

	traceroute 10.5.2.2
	traceroute 10.5.1.1
	traceroute 10.5.1.2
	traceroute 10.5.4.1
	traceroute 10.5.4.2
	traceroute 10.5.3.1
	traceroute 10.5.3.2

	$remoteport = bash.exe -c "ifconfig eth0 \| grep 'inet '"
	$found = $remoteport -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';

	if( $found ){
	$remoteport = $matches[0];
	} else{
	echo "The Script Exited, the ip address of WSL 2 cannot be found";
	exit;
	}

	https://scene-si.org/2016/06/13/advanced-go-tips-and-tricks/
	https://medium.com/@trevor4e/learning-gos-concurrency-through-illustrations-8c4aff603b3
	https://golangcode.com/run-code-once-with-sync/
	https://bbengfort.github.io/snippets/2017/02/21/synchronizing-structs.html