longpass's Introduction

longpass

rule-based passphrase generator with custom Diceware-ish dictionaries

Overview

While Diceware is the way to go when you need to be sure your passphrase is secure, sometimes you need to generate them in bulk, and comply with policies about mixed-case and special characters.

Files

longpass -- generate a bunch of strong dictionary-based passphrases that follow a defined pattern.
rulesets/* -- a bunch of possible ruleset files
cache/rulesets/* -- cached JSON rulesets for performance
make-japanese -- use JMDict_e to generate a Japanese ruleset or Diceware file (with -d).
diceware/diceware-jp.txt -- output of make-japanese.rb -d

Usage

% longpass -l rulesets/japanese.txt 
Ruleset: rulesets/japanese.txt
Array Sizes:
   a 9695
   d 10
   s 4
   v 10
Patterns:
   1 ( 88.10): a a a a a a vsd
   2 (114.59): a a a a a a a a vsd
   3 (101.35): a a a a a a a vsd
   4 ( 74.86): a a a a a vsd
   5 ( 61.62): a a a a vsd
   6 (105.94): a a a a a a a a
   7 ( 92.70): a a a a a a a
   8 ( 79.46): a a a a a a
   9 ( 66.22): a a a a a
  10 ( 52.97): a a a a

Random printable ASCII passwords (6.57 bits/char):
   8=52.56  10=65.70  12=78.84  14=91.98  16=105.12  18=118.26

% longpass -c 5 rulesets/japanese.txt 
hansei boken tekubi kicho konro tokoya A*9
daga hiritsu chojin wakaru keigen kiseru X-5
kippo miukeru ensei kiseru yozora kansho Y-6
orei sokutei omutsu tagaku kakeru kome Y-2
yui kanku haikyo gairoju inritsu mokunin X+3

% longpass -p 14 -c 5 rulesets/eff4dice1.txt
prizebooth emptyice awokejoy Z-6
mardistony decalhash icetug Q*7
thosepurr bagelhut acidwife B*1
payeromen booklurk slamdress Y*7
happyslice denimarmed relayrebel N-2

% longpass -c 100000 rulesets/tolkien.txt > /dev/null

real    0m1.987s
user    0m1.892s
sys     0m0.065s