Merge pull request #401 from edx/feature/ichuang/cas-authentication

Provide CAS authentication integration

lms/envs/common.py

@@ -92,6 +92,7 @@ MITX_FEATURES = {
     'AUTH_USE_MIT_CERTIFICATES': False,
     'AUTH_USE_OPENID_PROVIDER': False,
     'AUTH_USE_SHIB': False,
+    'AUTH_USE_CAS': False,
 
     # This flag disables the requirement of having to agree to the TOS for users registering
     # with Shib.  Feature was requested by Stanford's office of general counsel
@@ -856,3 +857,14 @@ def enable_theme(theme_name):
     # avoid collisions with default edX static files
     STATICFILES_DIRS.append((u'themes/%s' % theme_name,
                              theme_root / 'static'))
+
+######################## CAS authentication ###########################
+
+if MITX_FEATURES.get('AUTH_USE_CAS'):
+    CAS_SERVER_URL = 'https://provide_your_cas_url_here'
+    AUTHENTICATION_BACKENDS = (
+        'django.contrib.auth.backends.ModelBackend',
+        'django_cas.backends.CASBackend',
+    )
+    INSTALLED_APPS += ('django_cas',)
+    MIDDLEWARE_CLASSES += ('django_cas.middleware.CASMiddleware',)

lms/urls.py

@@ -363,6 +363,12 @@ if settings.MITX_FEATURES.get('AUTH_USE_SHIB'):
         url(r'^shib-login/$', 'external_auth.views.shib_login', name='shib-login'),
     )
 
+if settings.MITX_FEATURES.get('AUTH_USE_CAS'):
+    urlpatterns += (
+        url(r'^cas-auth/login/$', 'external_auth.views.cas_login', name="cas-login"),
+        url(r'^cas-auth/logout/$', 'django_cas.views.logout', {'next_page': '/'}, name="cas-logout"),
+    )
+
 if settings.MITX_FEATURES.get('RESTRICT_ENROLL_BY_REG_METHOD'):
     urlpatterns += (
         url(r'^course_specific_login/(?P<course_id>[^/]+/[^/]+/[^/]+)/$',