GSSAPI authentication for Django

Provide GSSAPI (SPNEGO) authentication to Django applications.

It’s a rewrite of django-kerberos using python-gssapi.

It’s only tested with MIT Kerberos 5 using package k5test.

Python 2 and 3, Django >1.8 are supported.

Basic usage

Add this to your project urls.py:

url('^auth/gssapi/', include('django_gssapi.urls')),

And use the default authentication backend, by adding that to your settings.py file:

AUTHENTICATION_BACKENDS = (
    'django_gssapi.backends.GSSAPIBackend',
)

View

django-gssapi provide a base LoginView that you can subclass to get the behaviour your need, the main extension points are:

• challenge() returns the 401 response with the challenge, you should override it to show a template explaining the failure,

• success(user) it should log the given user and redirect to REDIRECT_FIELD_NAME,

• get_service_name() it should return a gssapi.Name for your service, by default it returns None, so GSSAPI will match any name available (for example with Kerberos it will match any name in your keytab, like @HTTP/my.domain.com@).

Settings

To make your application use GSSAPI as its main login method:

LOGIN_URL = 'gssapi-login'

Your application need an environment where the GSSAPI mechanism like Kerberos will work, for Kerberos it means having a default keytab of creating one and setting its path in KRB5_KTNAME or you can use GSSAPI_STORE with MIT Kerberos 5 and credential store extension to indicate a keytab:

GSSAPI_STORE = {'keytab': 'FILE:/var/lib/mykeytab'}

You can also force a GSSAPI name for you service with:

import gssapi

GSSAPI_NAME = gssapi.Name('HTTP/my.service.com', gssapi.MechType.hostbased_service)

GSSAPI authentication backend

A dummy backend is provided in django_gssapi.backends.GSSAPIBackend it looks up user with the same username as the GSSAPI name. You should implement it for your use case.

A custom authentication backend must have the following signature:

class CustomGSSAPIBackend(object):
    def authenticate(self, request, gssapi_name):
        pass

The parameter gssapi_name is a gssapi.Name object, it can be casted to string to get the raw name.

Kerberos username/password backend

If your users does not have their browser configured for SPNEGO HTTP authentication you can also provide a classic login/password form which check passwords using Kerberos. For this use django_gssapi.backends.KerberosPasswordBackend, the username is used as the raw principal name.

django-rest-framework authentication backend

To authenticate users with GSSAPI you can use django_gssapi.drf.GSSAPIAuthentication, it uses the configured GSSAPI authentication backend to find an user and returns the GSSAPI name in request.auth.