bin/generate_password

   1 #!/bin/env ruby
   2
   3 require "openssl"
   4
   5 arguments = ARGV
   6
   7 if arguments.size != 3
   8   puts "generate_password <size> <seed_file> <password_key>"
   9   exit
  10 end
  11
  12 size = arguments.shift
  13 seed_file = arguments.shift
  14 password_key = arguments.shift
  15
  16 size = size.to_i
  17
  18 set = ('a' .. 'z').to_a + ('A' .. 'Z').to_a + ('0' .. '9').to_a
  19
  20 key = "#{File.open(seed_file).read}:#{password_key}"
  21
  22 password = size.times.collect do |i|
  23   set[OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha256'), key, i.to_s).to_i(16) % set.size]
  24 end.join
  25
  26 puts password