Django Enhance Password Policy

Preface

Django build in password policy are by itself provide a great basis toward making sure the password that the user choose is relatively strong enough that its hard to guess.

Build in Password Validators

however usually in a business setting, almost all company will have its own set of password policy that need fine grain control of what is acceptable and what is not.

Things like password require 1 uppercase, 1 lowercase, 1 digit, and 1 special character or thing such as no repeated password for the last x number password change require a special kinda of password validator so that we can make it better. My go to password validator would be django-password-validators.

Installing Django Password Validator

Installing django-password-validators with the command:

pipenv install django-password-validators
pipenv lock -r >requirements.txt

Configuring the settings

If you want to have only the password strength check, just use the following in your settings.py file

INSTALLED_APPS = [
     ...
     'django_password_validators',
     ...
 ]

AUTH_PASSWORD_VALIDATORS = [
    ...
    {
        'NAME': 'django_password_validators.password_character_requirements.password_validation.PasswordCharacterValidator',
        'OPTIONS': {
             'min_length_digit': 1,
             'min_length_alpha': 2,
             'min_length_special': 3,
             'min_length_lower': 4,
             'min_length_upper': 5,
             'special_characters': "~!@#$%^&*()_+{}\":;'[]"
         }
    },
    ...
]

however if you need validator to check with the historical password

INSTALLED_APPS = [
     ...
     'django_password_validators',
     'django_password_validators.password_history',
     ...
 ]

AUTH_PASSWORD_VALIDATORS = [
    ...
    {
        'NAME': 'django_password_validators.password_history.password_validation.UniquePasswordsValidator',
        'OPTIONS': {
             # How many recently entered passwords matter.
             # Passwords out of range are deleted.
             # Default: 0 - All passwords entered by the user. All password hashes are stored.
            'last_passwords': 5 # Only the last 5 passwords entered by the user
        }
    },
    ...
]

# If you want, you can change the default hasher for the password history.
DPV_DEFAULT_HISTORY_HASHER = 'django_password_validators.password_history.hashers.HistoryHasher'