Simple generation of readable tokens using Ruby

readable_token.rb

#!/usr/bin/env ruby
# encoding: UTF-8

# Simple readable password generation in Ruby.
#
# Generate reasonably secure random passwords of any chosen length,
# designed to be somewhat easy for humans to read and remember.
# Each password has a capitalized letter and a digit.
#
# Example:
#
#   pwgen = PasswordGenerator.new
#   for i in 0..10
#     puts pwgen.generate(8)
#   end
#
#   pwgen.generate_laywersafe(8)
#
class ReadableToken

  # These are some koremutake syllables, plus the most common 2 and 3 letter 
  # syllables taken from the most common 5,000 words in Brazillian Portuguese (pt_br), minus a few
  # syllables removed so that combinations cannot generate common rude
  # words in Brazillian Portuguese (pt_br).
  SYLLABLES = %w(ba be bi bo bu da de di do du fa fe fi fo fu ga ge gi
    go gu ho ja je ji jo ju ka ke ko ku la le li lo lu ma me mi mo mu na ne 
    ni no nu pa pe pi po pu ra re ri ro ru sa se si so su ta te ti to tu va 
    ve vi vo vu bra bri bro bru dre dri dro dru fra fri fro fru gra gri 
    gro gru pra pre pri pro pru nte ao es ndo ca co ter com cal nho ver ter ser 
    ora rda za ze zi zo zu xa xe xi xo xu)

  CURSES = %w(fod fud ralho puta bucet vagin pau pica rola saco escrot babaca bagos
    baitola besta bicha bixa biscate bisca boceta boiola bolagato boquete bolcat bosseta
    boceta bosta bostana bronha buceta bund burr busseta cachorra cadela caga cagao cagad
    cagona canalha caralho cassete cacete checheca chereca chifrud chota chochota chupad
    cocaina coco corn corrupt cretin cu curalho cuzao cuzuada cuzudo debil demonio doid egua
    escrot estupid fedid fedor fedorenta feio feia felaçao fod fornica fudendo fudecao
    fudid gay gonorreia gonorrea gosment homo sexo sexual homosexual homossexual idiot imbecil
    iscrot ladra ladrao ladro lepros lesbic macac machona machorra manguaca masturb
    melec merda mija mijad mijo mocrea mocreia moleca moleque mondrog nojent otar paspalh
    pau peid pemba penis pentelho perereca pica picao pilantra piranha piru porra prostibul
    prostitut punhet pus pustula puta puts putaria puxa-saco puxasaco rabao rabud rachadinh
    ramelao retadard retardad ridicul rola rolinha rolao rosca rapariga safad sapatao sifilis
    siririca tarad testud narigud cabecuda tezuda tezao trocha trouxa troucha trolha troxa vaca
    vagabund vagina vead viad xerereca cherereca xexeca xota chota xoxot chochot xana chana
    xaninha chaninha)
    
  def self::generate(length)
    srand    
    recursion_countdown=20
    result = self.generate_token(length)
    while CURSES.include?(result) && recursion_countdown>0
      if recursion_countdown<=0
        raise "Token generator too dirty, prepare the lawyers!"
      end
      sleep 0.001
      result = self.generate_token(length)
      recursion_countdown-=1
    end
    return result
  end

private
  def self::generate_token(length)
    result = ''
    while result.length < length
      syl = SYLLABLES[rand(SYLLABLES.length)]
      result += syl
    end
    result = result[0,length]
    # Stick in a digit
    dpos = rand(length)
    
    wrapped_numbers="-#{rand(9).to_s}#{rand(9).to_s}-"
    
    result.insert dpos,wrapped_numbers
    
    if result[0]=='-'
      result=result[1..result.size-1]
    end
    if result[result.size]=='-'
      result=result[0..result.size-2]
    end
    
    # Make a letter capitalized
    #cpos = rand(length)
    #result[cpos,1] = result[cpos,1].swapcase
    return result.upcase
  end
  
end