https://replit.com/@numinit/DC30Keygen?v=1

dc30-keygen.rb

#!/usr/bin/env ruby
# usage: $0 <badge ID, in hex or decimal> (this is the number on the Call Jenny screen)
# keygen by numinit
# gr33tz dc858; Distractions, Inc
# NixOS rules

raise ArgumentError, <<EOF if ARGV.empty?
usage: #$0 <badge ID, in hex or decimal> (this is the number on the Call Jenny screen)
Note that you have to enter the following on the Play screen first:

GED CDE GED
CDE GEG AEA
GED CGE DCD
EGE DCD EDE
GEG AEA BG#F#
EBG# F#
EOF

id = Integer(ARGV.first)
stuff = [
  0xa5fa3b7f,
  0xe35c2742,
  0xbec5ca0f,
  0x87e35d46,
  0x5acd14f9,
  0xabde1fcf
]

names = %w[
  Alice Bob Carol Dan Eve Trevor
]

stuff.zip(names).each do |thing, name|
  key = (thing ^ id).to_s(10).rjust(10, ?0).chars.rotate(-1).join
  puts "Unlock for #{name} is: #{key}"
end