FreeOTP Tokens.xml Exporter

gistfile1.rb

#!/usr/bin/env ruby
module GoogleBase32

  Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567" #RFC4648
  Digits = Alphabet.chars
  Mask = Digits.length - 1
  Shift = Digits.length.to_s(2).match(/0*\Z/)[0].length

  def self.encode_array(array)

    return '' if array.empty?

    raise ArgumentError if array.length >= (1<<28)

    result = ''

    buffer = array.first
    nxt = 1
    bits_left = 8

    while bits_left > 0 or nxt < array.length

      if bits_left < Shift
        if nxt < array.length
          buffer <<= 8
          buffer = (buffer | (array[nxt] & 0xff))
          nxt += 1
          bits_left += 8
        else
          pad = Shift - bits_left
          buffer <<= pad
          bits_left += pad
        end
      end

      index = Mask & (buffer >> (bits_left - Shift))
      bits_left -= Shift

      result << Digits[index]
    end

    return result
  end

end

require 'nokogiri'
require 'json'
require 'uri'

f = File.open ARGV[0]
n = Nokogiri.parse f

n.xpath("//string").each do |string|
  j = JSON.parse(string.inner_text)
  next unless j.is_a? Hash and j.has_key? 'secret'

  r = "otpauth://#{j['type'].downcase}/#{j['issuerAlt']}"
  r << "?secret=#{GoogleBase32.encode_array j['secret']}"
  r << "&period=#{j['period']}"
  r << "&digits=#{j['digits']}"
  r << "&algorithm=#{j['algo']}"

  if not j['issuerInt'].to_s.empty?
    r << "&issuer=#{j['issuerInt']}"
  elsif not j['issuerExt'].to_s.empty?
    r << "&issuer=#{j['issuerExt']}"
  end

  r << "&counter=#{j['counter'] + 1}" if j['type'] == 'HOTP'

  puts r
end

f.close