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#!/bin/env ruby
require "openssl"
arguments = ARGV
if arguments.size != 3
puts "generate_password <size> <seed_file> <password_key>"
exit
end
size = arguments.shift
seed_file = arguments.shift
password_key = arguments.shift
size = size.to_i
set = ('a' .. 'z').to_a + ('A' .. 'Z').to_a + ('0' .. '9').to_a
key = "#{File.open(seed_file).read}:#{password_key}"
password = size.times.collect do |i|
set[OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha256'), key, i.to_s).to_i(16) % set.size]
end.join
puts password
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