simple-password-generation

Generate and check secure passwords in Python.

This is intended for use as a password strength checking and suggestion library for APIs, though it could also be integrated into a password database application.

Usage

>>> from simple_pass import create_password, check_havebeenpwned, scoring
>>> password = create_password()
>>> print(password)
unfurcate necessitate nonfact retrogradation swathband orthitic

>>> check_havebeenpwned(password)
True
>>> scoring(password)
(True, 75)

HaveIBeenPwned

Generated passwords are automatically securely checked against the HaveIBeenPwned database. Partial hashes are sent using the HaveIBeenPwned API. This can not be reconstructed to determine the checked password.

User generated passwords can be checked by calling check_havebeenpwned(password).

Scoring Options

Passwords can be checked with a scoring based system using the following options.

def scoring(
    password,
    *,
    minimum_length=8,
    minimum_score=20,
    points_for_lower=2,
    points_for_upper=2,
    points_for_numbers=2,
    points_per_special=2,
    special_characters=" !@#$%^&*()-=_+.,<>[]{}/?\\|",
    points_per_character=1,
):

I believe this scoring system encourages long and difficult to guess passwords by rewarding lengthy passwords and special characters, but without requiring a specific password format or frustrating rules.

XKCD, Comics, Horses, and batteries

For wisdom on what makes a good password see the famous xkcd correct horse battery staple comic. The correct horse battery staple example passes with a score of 36 using the default parameters. It does not pass the HaveIBeenPwned check, however, as it is a well known password that has probably been found in many breaches.