https://www.youtube.com/playlist?list=PLhOuww6rJJNMRNnUQyUkGjpztCBUCiwZt
Create a program that will randomly combine words from given text(s) to create novel, memorable, unbreakable passwords:
$ ./password.py
EchinochloaJapeCollinglyRadiotrician
EthanedithiolRefleePrebudgetPolyphonism
BerriChamaecyparisOutdraftArcifera
By default, the program should read the standard word dictionary /usr/share/dict/words for the word list but should also accept optional positional arguments.
The program should create a list of unique words with all non-word characters removed, randomly select some -w or --num_words for each password, and join the titlecased selections into new passwords:
$ ./password.py -w 3 scarlet/*
ShouldOfferPeculiar
LongDeathWill
LikeVenerableBear
The words selected should have a -m or --min_word_len that defaults to 3 in order to remove short, unmemorable words:
$ ./password.py -m 5 sonnets/*
IndigestPublishPaintingParticular
AccidentImprintDancePosterity
ExcuseGrossStateLaughd
The program should accept a -n and --num flag to control the number of passwords that are created:
$ ./password.py -n 2 const/*
NumberFollowExtraordinaryCompel
ThinkLegislationAppellateEligible
Be sure to accept a -s or --seed option to use as the random seed to ensure reproducibility:
$ ./password.py -s 1
ChromePorometerUnwastableUnconditionated
ThujaAwesomelyEyeglanceCatabolin
OptiveThicketMoratoriaNoncompetent
If the --l33t flag is present, the passwords should be obfuscated by:
- Using the "ransom" algorightm from chapter 13
- Using a character substitution as in chapter 5
- Add a randomly selected punctuation at the end
Here is the substitution table:
a => @
A => 4
o => 0
O => 0
t => +
e => 3
E => 3
I => 1
S => 5
Here is what the output would look like without:
$ ./password.py sonnets/* -s 1
EagerCarcanetLilyDial
WantTempestTwireRondure
HealCrawlVerdictBase
And the same passwords with the encoding:
$ ./password.py sonnets/* -s 1 --l33t
34G3rc4rC4n3TliLydi@L.
5p0r+1V3B@sT@RDhURT5uFf3Rd\
rh3T0r1cC0n+3ndsU1T3Dw1l+`
The program should print a usage for the -h and --help flags:
$ ./password.py -h
usage: password.py [-h] [-n int] [-w int] [-m int] [-s int] [-l]
[FILE [FILE ...]]
Password maker
positional arguments:
FILE Input file(s) (default: [<_io.TextIOWrapper
name='/usr/share/dict/words' mode='r'
encoding='UTF-8'>])
optional arguments:
-h, --help show this help message and exit
-n int, --num int Number of passwords to generate (default: 3)
-w int, --num_words int
Number of words to use for password (default: 4)
-m int, --min_word_len int
Minimum word length (default: 4)
-s int, --seed int Random seed (default: None)
-l, --l33t Obfuscate letters (default: False)
Run the test suite to ensure your program is correct:
$ make test
pytest -xv test.py
============================= test session starts ==============================
...
collected 7 items
test.py::test_exists PASSED [ 14%]
test.py::test_usage PASSED [ 28%]
test.py::test_bad_file PASSED [ 42%]
test.py::test_bad_num PASSED [ 57%]
test.py::test_bad_num_words PASSED [ 71%]
test.py::test_bad_min_word_len PASSED [ 85%]
test.py::test_bad_seed PASSED [100%]
============================== 7 passed in 0.46s ===============================