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# -*- coding: utf-8 -*-
##
## passwd.py v0.1
##
## modified by David Fraser <davidf@sjsoft.com>, 2001-08-10
## based on pgenerate.py (Author and description below)
## simple func generates an english-looking lowercase word with no funny chars
##
## Randomly creates a password with specified length, or picks
## a password from a dictionary. Also randomly warps the characters,
## making passwords from a dictionary more or less readable but
## slightly more difficult to crack.
##
##
## Author: Rikard Bosnjakovic <bos@hack.org>, 2001-06-12
##
from whrandom import choice, randint
# choose your dictionary
dictionary_file = '/usr/share/dict/words'
def createpassword(min_chars = 6, max_chars = 8):
"""createpassword([min_chars = 6, max_chars = 8):
Picks a password from a dictionary and warps it, with minimum and maximum chars as specified (default 6,8)."""
# Get a word from a dictionary with minimum [min_chars] and maximum [max_chars] characters.
word = ""
words = open(dictionary_file, "r").readlines()
while (len(word) < min_chars) or (len(word) > max_chars):
word = choice(words)
password = word.lower().strip()
# Warps around the chars in the password.
import string
warps = {}
# add the alphabet to the warplist
for x in xrange(ord('a'), ord('z')+1):
x = chr(x)
warps[x] = [x]
# add some specials
specialchars = (("a", ["e", "y"]),
("b", ["p", "m"]),
("c", ["k", "s"]),
("d", ["t", "n"]),
("e", ["i"]),
("f", ["v", "ph"]),
("g", ["k", "ng"]),
("i", ["y"]),
("j", ["z"]),
("k", ["g"]),
("l", ["y"]),
("m", ["b", "p"]),
("n", ["d", "t"]),
("o", ["u"]),
("p", ["b", "m"]),
("q", ["k"]),
("s", ["z"]),
("t", ["d", "n"]),
("u", ["o", "a"]),
("v", ["f"]),
("x", ["k"]),
("z", ["s"]))
for (a,b) in specialchars:
warps[a] += b
warped_password = ""
# warp the chars in the password
for i in password:
if i in warps.keys():
warped = password.startswith(warped_password)
# 50% probability if warped, 75% if as yet unwarped
if (warped and randint(0, 3)) or ((not warped) and randint(0, 1)):
warped_password += choice(warps[i])
else:
warped_password += i
else:
warped_password += i
return warped_password
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