diff --git a/.travis.yml b/.travis.yml new file mode 100644 index 00000000..94719e61 --- /dev/null +++ b/.travis.yml @@ -0,0 +1,9 @@ +language: python +python: + - "2.7" +install: + - pip install -qr requirements.txt + - pip install coveralls +script: ./test.sh +after_success: + coveralls diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 00000000..50708c39 --- /dev/null +++ b/AUTHORS @@ -0,0 +1 @@ +Renzo Lucioni diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst new file mode 100644 index 00000000..10b3156f --- /dev/null +++ b/CONTRIBUTING.rst @@ -0,0 +1,9 @@ +How To Contribute +================= + +Contributions are very welcome. + +Please read `How To Contribute `_ for details. + +Even though it was written with ``edx-platform`` in mind, the guidelines +should be followed for Open edX code in general. diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100644 index 00000000..1eb391f3 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,671 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. + +EdX Inc. wishes to state, in clarification of the above license terms, that +any public, independently available web service offered over the network and +communicating with edX's copyrighted works by any form of inter-service +communication, including but not limited to Remote Procedure Call (RPC) +interfaces, is not a work based on our copyrighted work within the meaning +of the license. "Corresponding Source" of this work, or works based on this +work, as defined by the terms of this license do not include source code +files for programs used solely to provide those public, independently +available web services. diff --git a/MANIFEST.in b/MANIFEST.in new file mode 100644 index 00000000..9561fb10 --- /dev/null +++ b/MANIFEST.in @@ -0,0 +1 @@ +include README.rst diff --git a/README.md b/README.md deleted file mode 100644 index 7222a177..00000000 --- a/README.md +++ /dev/null @@ -1 +0,0 @@ -# auth-backends diff --git a/README.rst b/README.rst new file mode 100644 index 00000000..c9ee0ac6 --- /dev/null +++ b/README.rst @@ -0,0 +1,77 @@ +auth-backends |Travis|_ |Coveralls|_ +============= +.. |Travis| image:: https://travis-ci.org/edx/auth-backends.svg?branch=master +.. _Travis: https://travis-ci.org/edx/auth-backends + +.. |Coveralls| image:: https://img.shields.io/coveralls/edx/auth-backends.svg +.. _Coveralls: https://coveralls.io/r/edx/auth-backends?branch=master + +This repo houses custom authentication backends and pipeline steps used by edX +projects such as the `edx-analytics-dashboard `_ +and `edx-ecommerce `_. + +This project is new and under active development. + +Overview +-------- + +Included backends: + +=============== ============================================ +Backend Purpose +--------------- -------------------------------------------- +Open ID Connect Authenticate with the LMS, an OIDC provider. +=============== ============================================ + +This package requires Django 1.7. Required Django settings: + +============================================ ============================================ +Setting Default +-------------------------------------------- -------------------------------------------- +SOCIAL_AUTH_EDX_OIDC_KEY None +SOCIAL_AUTH_EDX_OIDC_SECRET None +SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY None +SOCIAL_AUTH_EDX_OIDC_URL_ROOT None +EXTRA_SCOPE [] +COURSE_PERMISSIONS_CLAIMS [] +============================================ ============================================ + +Set these to the correct values for your OAuth2/OpenID Connect provider. ``SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY`` +should be the same as ``SOCIAL_AUTH_EDX_OIDC_SECRET``. Set ``EXTRA_SCOPE`` equal to a list of scope strings to request +additional information from the edX OAuth2 provider at the moment of authentication (e.g., provide course permissions bits +to get a full list of courses). + +Testing +------- + +Execute ``test.sh`` to run the test suite. + +License +------- + +The code in this repository is licensed under the AGPL unless otherwise noted. + +Please see ``LICENSE.txt`` for details. + +How To Contribute +----------------- + +Contributions are very welcome! + +Please read `How To Contribute `_ for details. + +Even though it was written with `edx-platform `_ in mind, +the guidelines should be followed for Open edX code in general. + +Reporting Security Issues +------------------------- + +Please do not report security issues in public. Please email security@edx.org. + +Mailing List and IRC Channel +---------------------------- + +You can discuss this code on the `edx-code Google Group`__ or in the +``#edx-code`` IRC channel on Freenode. + +__ https://groups.google.com/forum/#!forum/edx-code diff --git a/auth_backends/__init__.py b/auth_backends/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/auth_backends/backends.py b/auth_backends/backends.py new file mode 100644 index 00000000..79007450 --- /dev/null +++ b/auth_backends/backends.py @@ -0,0 +1,114 @@ +"""Django authentication backends. + +For more information visit https://docs.djangoproject.com/en/dev/topics/auth/customizing/. +""" +import json + +from django.conf import settings +import django.dispatch +from social.backends.open_id import OpenIdConnectAuth + + +# pylint: disable=abstract-method +class EdXOpenIdConnect(OpenIdConnectAuth): + name = 'edx-oidc' + + ACCESS_TOKEN_METHOD = 'POST' + REDIRECT_STATE = False + ID_KEY = 'preferred_username' + + DEFAULT_SCOPE = ['openid', 'profile', 'email'] + getattr(settings, 'EXTRA_SCOPE', []) + ID_TOKEN_ISSUER = getattr(settings, 'SOCIAL_AUTH_EDX_OIDC_URL_ROOT', None) + AUTHORIZATION_URL = '{0}/authorize/'.format(ID_TOKEN_ISSUER) + ACCESS_TOKEN_URL = '{0}/access_token/'.format(ID_TOKEN_ISSUER) + USER_INFO_URL = '{0}/user_info/'.format(ID_TOKEN_ISSUER) + + PROFILE_TO_DETAILS_KEY_MAP = { + 'preferred_username': u'username', + 'email': u'email', + 'name': u'full_name', + 'given_name': u'first_name', + 'family_name': u'last_name', + 'locale': u'language', + } + + auth_complete_signal = django.dispatch.Signal(providing_args=["user", "id_token"]) + + def user_data(self, _access_token, *_args, **_kwargs): + # Include decoded id_token fields in user data. + return self.id_token + + def auth_complete_params(self, state=None): + params = super(EdXOpenIdConnect, self).auth_complete_params(state) + + # TODO: Due a limitation in the OIDC provider in the LMS, the list of all course permissions + # is computed during the authentication process. As an optimization, we explicitly request + # the list here, avoiding further roundtrips. This is no longer necessary once the limitation + # is resolved and instead the course permissions can be requested on a need to have basis, + # reducing overhead significantly. + claim_names = getattr(settings, 'COURSE_PERMISSIONS_CLAIMS', []) + courses_claims_request = {name: {'essential': True} for name in claim_names} + params['claims'] = json.dumps({'id_token': courses_claims_request}) + + return params + + def auth_complete(self, *args, **kwargs): + # WARNING: During testing, the user model class is `social.tests.models` and not the one + # specified for the application. + user = super(EdXOpenIdConnect, self).auth_complete(*args, **kwargs) + self.auth_complete_signal.send(sender=self.__class__, user=user, id_token=self.id_token) + return user + + def get_user_claims(self, access_token, claims=None): + """Returns a dictionary with the values for each claim requested.""" + + data = self.get_json( + self.USER_INFO_URL, + headers={'Authorization': 'Bearer {0}'.format(access_token)} + ) + + if claims: + claims_names = set(claims) + data = {k: v for (k, v) in data.iteritems() if k in claims_names} + + return data + + def get_user_details(self, response): + details = self._map_user_details(response) + + # Limits the scope of languages we can use + locale = response.get('locale') + if locale: + details[u'language'] = _to_language(response['locale']) + + # Set superuser bit if the provider determines the user is an administrator + details[u'is_superuser'] = details[u'is_staff'] = response.get('administrator', False) + + return details + + def _map_user_details(self, response): + """Maps key/values from the response to key/values in the user model. + + Does not transfer any key/value that is empty or not present in the reponse. + """ + dest = {} + for source_key, dest_key in self.PROFILE_TO_DETAILS_KEY_MAP.items(): + value = response.get(source_key) + if value is not None: + dest[dest_key] = value + + return dest + + +def _to_language(locale): + """Convert locale name to language code if necessary. + + OpenID Connect locale needs to be converted to Django's language + code. In general however, the differences between the locale names + and language code are not very clear among different systems. + + For more information, refer to: + http://openid.net/specs/openid-connect-basic-1_0.html#StandardClaims + https://docs.djangoproject.com/en/1.6/topics/i18n/#term-translation-string + """ + return locale.replace('_', '-').lower() diff --git a/auth_backends/pipeline.py b/auth_backends/pipeline.py new file mode 100644 index 00000000..6ec76c2b --- /dev/null +++ b/auth_backends/pipeline.py @@ -0,0 +1,31 @@ +"""Python-social-auth pipeline functions. + +For more info visit http://python-social-auth.readthedocs.org/en/latest/pipeline.html. +""" +from django.contrib.auth import get_user_model + + +User = get_user_model() + + +# pylint: disable=unused-argument +# The function parameters must be named exactly as they are below. +# Do not change them to appease Pylint. +def get_user_if_exists(strategy, details, user=None, *args, **kwargs): + """Return a User with the given username iff the User exists.""" + if user: + return {'is_new': False} + try: + username = details.get('username') + + # Return the user if it exists + return { + 'is_new': False, + 'user': User.objects.get(username=username) + } + except User.DoesNotExist: + # Fall to the default return value + pass + + # Nothing to return since we don't have a user + return {} diff --git a/auth_backends/tests/__init__.py b/auth_backends/tests/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/auth_backends/tests/test_backends.py b/auth_backends/tests/test_backends.py new file mode 100644 index 00000000..7a1508e7 --- /dev/null +++ b/auth_backends/tests/test_backends.py @@ -0,0 +1,21 @@ +from django.conf import settings +from social.tests.backends.oauth import OAuth2Test +from social.tests.backends.open_id import OpenIdConnectTestMixin + + +class EdXOpenIdConnectTests(OpenIdConnectTestMixin, OAuth2Test): + backend_path = 'auth_backends.backends.EdXOpenIdConnect' + issuer = getattr(settings, 'SOCIAL_AUTH_EDX_OIDC_URL_ROOT', None) + expected_username = 'test_user' + + def get_id_token(self, *args, **kwargs): + data = super(EdXOpenIdConnectTests, self).get_id_token(*args, **kwargs) + + # Set the field used to derive the username of the logged user. + data['preferred_username'] = self.expected_username + + return data + + def test_login(self): + user = self.do_login() + self.assertIsNotNone(user) diff --git a/auth_backends/tests/test_pipeline.py b/auth_backends/tests/test_pipeline.py new file mode 100644 index 00000000..6dae4891 --- /dev/null +++ b/auth_backends/tests/test_pipeline.py @@ -0,0 +1,27 @@ +from django.contrib.auth import get_user_model +from django.test import TestCase +from django_dynamic_fixture import G + +from auth_backends.pipeline import get_user_if_exists + + +class PipelineTests(TestCase): + def setUp(self): + self.user = get_user_model() + + def test_get_user_if_exists(self): + username = 'edx' + details = {'username': username} + + # If no user exists, return an empty dict + actual = get_user_if_exists(None, details) + self.assertDictEqual(actual, {}) + + # If user exists, return dict with user and any additional information + user = G(self.user, username=username) + actual = get_user_if_exists(None, details) + self.assertDictEqual(actual, {'is_new': False, 'user': user}) + + # If user passed to function, just return the additional information + actual = get_user_if_exists(None, details, user=user) + self.assertDictEqual(actual, {'is_new': False}) diff --git a/manage.py b/manage.py new file mode 100644 index 00000000..dc935d61 --- /dev/null +++ b/manage.py @@ -0,0 +1,10 @@ +#!/usr/bin/env python +import os +import sys + +if __name__ == "__main__": + os.environ.setdefault("DJANGO_SETTINGS_MODULE", "tests.settings") + + from django.core.management import execute_from_command_line + + execute_from_command_line(sys.argv) diff --git a/requirements.txt b/requirements.txt new file mode 100644 index 00000000..74d07465 --- /dev/null +++ b/requirements.txt @@ -0,0 +1,12 @@ +Django>=1.7 # BSD + +# PSA package on PyPI hasn't been updated to include a fix for a breaking change in PyJWT +# python-social-auth==0.2.1 # BSD License +git+https://github.com/omab/python-social-auth.git@bdf69d67d109acfda1016d4a2a63a1cc0a3aba84#egg=python-social-auth + +# For running tests +django-dynamic-fixture==1.8.1 # MIT +django-nose==1.3 +httpretty==0.6.5 +unittest2==0.5.1 +coverage==3.7.1 diff --git a/setup.py b/setup.py new file mode 100644 index 00000000..59b12b4d --- /dev/null +++ b/setup.py @@ -0,0 +1,37 @@ +from setuptools import setup + + +def readme(): + with open('README.rst') as f: + return f.read() + + +setup( + name='edx-auth-backends', + version='0.1', + description='Custom edX authentication backends and pipeline steps', + long_description=readme(), + classifiers=[ + 'Development Status :: 4 - Beta', + 'License :: OSI Approved :: GNU Affero General Public License v3', + 'Programming Language :: Python :: 2.7', + 'Topic :: Internet', + 'Intended Audience :: Developers', + 'Environment :: Web Environment', + ], + keywords='authentication edx', + url='https://github.com/edx/auth-backends', + author='edX', + author_email='oscm@edx.org', + license='AGPL', + packages=['auth_backends'], + install_requires=[ + 'Django>=1.7', + # PSA package on PyPI hasn't been updated to include a fix for a breaking change in PyJWT. + # For reference on how dependency_links is used here, see http://goo.gl/D5g4Qq. + 'python-social-auth<=0.2.2' + ], + dependency_links=[ + 'git+https://github.com/omab/python-social-auth.git@bdf69d67d109acfda1016d4a2a63a1cc0a3aba84#egg=python-social-auth-0.2.2', + ] +) diff --git a/test.sh b/test.sh new file mode 100755 index 00000000..bb9ee9b1 --- /dev/null +++ b/test.sh @@ -0,0 +1,3 @@ +#!/bin/sh + +python manage.py test auth_backends --with-coverage --cover-package=auth_backends diff --git a/tests/__init__.py b/tests/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/tests/settings.py b/tests/settings.py new file mode 100644 index 00000000..8641e6c0 --- /dev/null +++ b/tests/settings.py @@ -0,0 +1,102 @@ +"""Django settings used when testing.""" + + +########## MANAGER CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#admins +ADMINS = ( + ('admin', 'admin@example.com'), +) + +# See: https://docs.djangoproject.com/en/dev/ref/settings/#managers +MANAGERS = ADMINS +########## END MANAGER CONFIGURATION + + +########## IN-MEMORY TEST DATABASE +# See: https://docs.djangoproject.com/en/dev/ref/settings/#databases +DATABASES = { + 'default': { + 'ENGINE': 'django.db.backends.sqlite3', + 'NAME': ':memory:', + 'USER': '', + 'PASSWORD': '', + 'HOST': '', + 'PORT': '', + } +} +########## END DATABASE CONFIGURATION + + +########## GENERAL CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#site-id +SITE_ID = 1 + + +########## MEDIA CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-root +MEDIA_ROOT = '' + +# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-url +MEDIA_URL = '' +########## END MEDIA CONFIGURATION + + +########## STATIC FILE CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-root +STATIC_ROOT = '' + +# See: https://docs.djangoproject.com/en/dev/ref/settings/#media-url +STATIC_URL = '/static/' +########## END STATIC FILE CONFIGURATION + + +########## SECRET CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#secret-key +# Note: This key should only be used for testing. +SECRET_KEY = 'insecure-secret-key' +########## END SECRET CONFIGURATION + + +########## MIDDLEWARE CONFIGURATION +# See: https://docs.djangoproject.com/en/dev/ref/settings/#middleware-classes +MIDDLEWARE_CLASSES = ( + 'django.contrib.sessions.middleware.SessionMiddleware', + 'django.middleware.locale.LocaleMiddleware', + 'django.middleware.common.CommonMiddleware', + 'django.middleware.csrf.CsrfViewMiddleware', + 'django.contrib.auth.middleware.AuthenticationMiddleware', + 'django.contrib.messages.middleware.MessageMiddleware', + 'django.middleware.clickjacking.XFrameOptionsMiddleware', +) +########## END MIDDLEWARE CONFIGURATION + + +########## APP CONFIGURATION +INSTALLED_APPS = ( + 'django.contrib.auth', + 'django.contrib.contenttypes', + 'django.contrib.sessions', + 'django.contrib.sites', + 'django.contrib.messages', + 'django.contrib.staticfiles', + 'django.contrib.admin', + 'auth_backends', +) +########## END APP CONFIGURATION + + +########## TEST SETTINGS +SOCIAL_AUTH_EDX_OIDC_URL_ROOT = 'http://example.com' +SOCIAL_AUTH_EDX_OIDC_KEY = 'dummy-key' +SOCIAL_AUTH_EDX_OIDC_SECRET = 'dummy-secret' +SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY = 'dummy-secret' + +EXTRA_SCOPE = [] +COURSE_PERMISSIONS_CLAIMS = [] + +INSTALLED_APPS += ( + 'django_nose', +) + +TEST_RUNNER = 'django_nose.NoseTestSuiteRunner' +########## END TEST SETTINGS