django-zxcvbn-password-validator

A translatable password validator for django, based on zxcvbn-python and available with pip.

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Translating the project

This project is available in multiple language. Your contribution would be very appreciated if you know a language that is not yet available. See how to contribute

Language available

The software is developed in english. Other available languages are :

• [x] Dutch thanks to Thom Wiggers
• [x] French thanks to Pierre Sassoulas and Lionel Sausin
• [x] Brazilian Portuguese thanks to Andrés Martano
• [x] English

Creating a user with django-zxcvbn-password-validator

If the password is not strong enough, we provide errors explaining what you need to do :

The error message are translated to your target language (even the string given by zxcvbn that are in english only) :

How to use

Add django-zxcvbn-password-validator to your requirements and get it with pip. Then everything happens in your settings file.

Add 'django_zxcvbn_password_validator' in the INSTALLED_APPS :

INSTALLED_APPS = [
    # ...
    "django_zxcvbn_password_validator"
]

Modify AUTH_PASSWORD_VALIDATORS :

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
    },
    {
        "NAME": "django_zxcvbn_password_validator.ZxcvbnPasswordValidator",
    },
    # ...
]

You could choose to use zxcvbn alone, but I personally still use Django's UserAttributeSimilarityValidator, because there seems to be still be some problem with it integrating user information with zxcvbn (as of june 2018).

Finally, you can set the PASSWORD_MINIMAL_STRENGTH to your liking (default is 2), every password scoring lower than this number will be rejected :

# 0 too guessable: risky password. (guesses < 10^3)
# 1 very guessable: protection from throttled online attacks.
# (guesses < 10^6)
# 2 somewhat guessable: protection from unthrottled online attacks.
# (guesses < 10^8)
# 3 safely unguessable: moderate protection from offline slow-hash scenario.
# (guesses < 10^10)
# 4 very unguessable: strong protection from offline slow-hash scenario.
# (guesses >= 10^10)
PASSWORD_MINIMAL_STRENGTH = 0 if DEBUG else 4