Back-end and Front-end password validation with ZXCVBN
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README.rst

Django ZXCVBN Password

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Back-end and Front-end password validation with ZXCVBN.

A combination of pirandig’s django-zxcvbn and aj-may’s django-password-strength Django apps. It combines back-end and front-end validation with strength meter display.

License

Software licensed under ISC license.

Installation

pip install django-zxcvbn-password

Requirements

The JavaScript code of this application uses JQuery, but JQuery is not bundled with it. Please install it separately. You might also want to use Bootstrap.

Usage

# settings.py

INSTALLED_APPS = [
    ...
    'zxcvbn_password',
    ...
]

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
    {
        'NAME': 'zxcvbn_password.ZXCVBNValidator',
        'OPTIONS': {
            'min_score': 3,
            'user_attributes': ('username', 'email', 'first_name', 'last_name')
        }
    }
]
# forms.py

from django import forms
from zxcvbn_password.fields import PasswordField, PasswordConfirmationField

class RegisterForm(forms.Form):
    password1 = PasswordField()
    password2 = PasswordConfirmationField(confirm_with=’password1’)
# views.py

if form.is_valid():
    user = User.objects.create_user(
        username=...,
        password=form.cleaned_data['password1']
    )

By default, other inputs won't be used to compute the score, but you can enforce it like this:

# forms.py

from django import forms
from zxcvbn_password import zxcbnn
from zxcvbn_password.fields import PasswordField, PasswordConfirmationField

class RegisterForm(forms.Form):
    password1 = PasswordField()
    password2 = PasswordConfirmationField(confirm_with=’password1’)

    def clean():
        password = self.cleaned_data.get('password1')
        other_field1 = ...
        other_field2 = ...

        if password:
            score = zxcvbn(password, [other_field1, other_field2])['score']
            # score is between 0 and 4
            # raise forms.ValidationError if needed

        return self.cleaned_data

Screen-shot

https://cloud.githubusercontent.com/assets/3999221/23079032/5ae1513a-f54b-11e6-9d66-90660ad5fb2d.png

Important

The password field's widget declares two JavaScript files that must be added to the HTML page. To do so, add {{ form.media }} in your template, something like:

<form role="form" action="my_url" method="post">
  {% csrf_token %}
  {{ form }}
</form>

{% block js %}
  {{ block.super }}
  {{ form.media }}
{% endblock %}

Note

If you are not using Bootstrap, the strength bar will not have colors. You can fix this with these three CSS rules:

.progress-bar-warning {
    background-color: yellow;
}

.progress-bar-danger {
    background-color: red;
}

.progress-bar-success {
    background-color: green;
}

Documentation

On ReadTheDocs

Development

To run all the tests: tox