midnight-wonderer

import { default as curry } from 'ramda/src/curry';

function deleteChar(deleteCount: number, word: string): string[] {
  if (!(0 < deleteCount)) {
    return [word];
  }
  const accumulatedWordList = [];
  for (let wordIterator = 0; wordIterator < word.length; wordIterator++) {
    const deletedWord = `${

midnight-wonderer

# frozen_string_literal: true

require 'securerandom'

class RandomCode
  class NotSupported < ::StandardError
  end

  class P_Single < ::StandardError
  end

midnight-wonderer

I get an SSL error when AWS Lambda invokes dependencies that use a Let's Encrypt certificate.

Short description

Some AWS Lambda .NET Core and Ruby runtimes are experiencing certificate errors due to an expired Let's Encrypt cross-signed DST Root CA X3. For compatibility purposes, Let's Encrypt certificates default to using a certificate chain that's cross-signed by the DST Root CA X3 certificate that expired on September 30, 2021. OpenSSL versions 1.0.2 and earlier return an error when one of the verification paths is invalid, which prevents the successful establishment of SSL/TLS connections.

The following resolution removes the expired CA from the CA bundle and forces the system to use the file provided by the layer instead of the file packaged with the base system. OpenSSL versions 1.0.2 and earlier are forced to validate Let's Encrypt certificates using the alternate path provided in the environment variables.

Important: The system's trust store is frequently updated to include new CA root cer

midnight-wonderer

BLAKE3 vs BLAKE2 benchmark for short input

Observed result

blake3 : 335251.50 per second
blake2s: 715722.22 per second
blake2b: 663446.58 per second

Conclusion from the result

midnight-wonderer

path:
/etc/apt/preferences.d

command:
apt policy
apt-cache policy package-name

content:
Package: *
Pin: release o=RepoNameFromPolicyCommand

midnight-wonderer

# start session
ssh-agent $SHELL

ssh-add ./destination-key
ssh -i ./intermediate-key -A -t user@intermediate.example.com ssh -A user@destination.example.com

midnight-wonderer

# Cmnd alias specification
Cmnd_Alias      FIREWALL = /usr/sbin/ufw

# User privilege specification
username  ALL=NOPASSWD: FIREWALL

midnight-wonderer

• Firmware in place
• udev rules

midnight-wonderer

SHELL:=/usr/bin/env bash
SOURCE_DIR=$(strip $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST)))))
PSK=$(shell cat $(SOURCE_DIR)/psk | xargs)
SHADOWSOCKS_VERSION=v0.0.11

shadowsocks-download:
	URL="https://github.com/shadowsocks/go-shadowsocks2/releases/download/$(SHADOWSOCKS_VERSION)/shadowsocks2-linux.gz" && \
	((curl -s -L $$URL | gunzip -q) > $(SOURCE_DIR)/shadowsocks2) && \
	chmod +x $(SOURCE_DIR)/shadowsocks2

midnight-wonderer

SHELL:=/usr/bin/env bash
DEFAULT_INTERFACE=$(shell /sbin/route | grep default | grep -Eo "[a-z0-9]+$$")
VPC_CIDR=10.0.0.0/16

forward-traffic:
	/sbin/iptables -t nat -A POSTROUTING -o $(DEFAULT_INTERFACE) -s $(VPC_CIDR) -j MASQUERADE