django-passwords is a reusable app that provides a form field and validators that check the strength of a password.

You can install django-passwords with pip by typing:

pip install django-passwords 

Or with easy_install by typing:

easy_install django-passwords 

Or manually by downloading a tarball and typing:

python setup.py install 

django-passwords is compatible with Django 1.3 through 1.9 RC1. Pythons 2.7 and 3.4 are both supported.

django-passwords adds 6 optional settings

Optional:

Specifies minimum length for passwords:

PASSWORD_MIN_LENGTH = 6 # Defaults to 6

Specifies maximum length for passwords:

PASSWORD_MAX_LENGTH = 120 # Defaults to None

Specifies the location of a dictionary (file with one word per line):

PASSWORD_DICTIONARY = "/usr/share/dict/words" # Defaults to None

Specifies how close a fuzzy match has to be to be considered a match:

PASSWORD_MATCH_THRESHOLD = 0.9 # Defaults to 0.9, should be 0.0 - 1.0 where 1.0 means exactly the same.

Specifies a list of common sequences to attempt to match a password against:

PASSWORD_COMMON_SEQUENCES = [] # Should be a list of strings, see passwords/validators.py for default

Specifies number of characters within various sets that a password must contain:

PASSWORD_COMPLEXITY = { # You can omit any or all of these for no limit for that particular set "UPPER": 1, # Uppercase "LOWER": 1, # Lowercase "LETTERS": 1, # Either uppercase or lowercase letters "DIGITS": 1, # Digits "SPECIAL": 1, # Not alphanumeric, space or punctuation character "WORDS": 1 # Words (alphanumeric sequences separated by a whitespace or punctuation character) }

To use the formfield simply import it and use it:

from django import forms from passwords.fields import PasswordField class ExampleForm(forms.Form): password = PasswordField(label="Password")

You can make use of the validators on your own fields:

from django import forms from passwords.validators import dictionary_words field = forms.CharField(validators=[dictionary_words])

You can also create custom validator instances to specify your own field-specific configurations, rather than using the global configurations:

from django import forms from passwords.validators import ( DictionaryValidator, LengthValidator, ComplexityValidator) field = forms.CharField(validators=[ DictionaryValidator(words=['banned_word'], threshold=0.9), LengthValidator(min_length=8), ComplexityValidator(complexities=dict( UPPER=1, LOWER=1, DIGITS=1 )), ])

Django's password validation API is slightly different than the form validation API and has wrappers in the auth_password_validators module:

AUTH_PASSWORD_VALIDATORS = [ …, {"NAME": "passwords.auth_password_validators.ComplexityValidator"} ]