8 django-cas-provider is a provider for the `Central Authentication Service <http://jasig.org/cas>`_. It supports
9 CAS version 1.0 and CAS version 2.0 protocol. It allows remote services to authenticate users for the purposes
10 of Single Sign-On (SSO). For example, a user logs into a CAS server (provided by django-cas-provider) and can
11 then access other services (such as email, calendar, etc) without re-entering her password for each service.
12 For more details, see the `CAS wiki <http://www.ja-sig.org/wiki/display/CAS/Home>`_ and
13 `Single Sign-On on Wikipedia <http://en.wikipedia.org/wiki/Single_Sign_On>`_.
18 To install, run the following command from this directory::
20 python setup.py install
22 Or, put `cas_provider` somewhere on your Python path.
24 If you want use CAS v.2 protocol or above, you must install `lxml` package to correct work.
30 #. Add ``'cas_provider'`` to your ``INSTALLED_APPS`` tuple in *settings.py*.
31 #. In *settings.py*, set ``LOGIN_URL`` to ``'/cas/login/'`` and ``LOGOUT_URL`` to ``'/cas/logout/'``
32 #. In *urls.py*, put the following line: ``(r'^cas/', include('cas_provider.urls')),``
33 #. Create login/logout templates (or modify the samples)
34 #. Use 'cleanuptickets' management command to clean up expired tickets
39 CAS_TICKET_EXPIRATION - minutes to tickets expiration. Default is 5 minutes.
41 CAS_CUSTOM_ATTRIBUTES_CALLBACK - name of callback to provide dictionary with
42 extended user attributes (may be used in CAS v.2 or above). Default is None.
44 CAS_CUSTOM_ATTRIBUTES_FORMAT - name of custom attribute formatter callback will be
45 used to format custom user attributes. This package provide module `attribute_formatters`
46 with formatters for common used formats. Available formats styles are `RubyCAS`, `Jasig`
47 and `Name-Value. Default is Jasig style. See module source code for more details.
49 CAS_AUTO_REDIRECT_AFTER_LOGOUT - If False (default behavior, specified in CAS protocol)
50 after successful logout notification page will be shown. If it's True, after successful logout will
51 be auto redirect back to service without any notification.
54 PROTOCOL DOCUMENTATION
57 * `CAS Protocol <http://www.jasig.org/cas/protocol>`
58 * `CAS 1 Architecture <http://www.jasig.org/cas/cas1-architecture>`
59 * `CAS 2 Architecture <http://www.jasig.org/cas/cas2-architecture>`
60 * `Proxy Authentication <http://www.jasig.org/cas/proxy-authentication>`
61 * `CAS – Central Authentication Service <http://www.jusfortechies.com/cas/overview.html>`
62 * `Proxy CAS Walkthrough <https://wiki.jasig.org/display/CAS/Proxy+CAS+Walkthrough>`
70 It has not required arguments.
74 * template_name - login form template name (default is 'cas/login.html')
75 * success_redirect - redirect after successful login if service GET argument is not provided
76 (default is settings.LOGIN_REDIRECT_URL)
77 * warn_template_name - warning page template name to allow login user to service if he
78 already authenticated in SSO (default is 'cas/warn.html')
80 If request.GET has 'warn' argument and user has already authenticated in SSO it shows
81 warning message instead of generate Service Ticket and redirect.
86 This destroys a client's single sign-on CAS session. The ticket-granting cookie is destroyed,
87 and subsequent requests to login view will not obtain service tickets until the user again
88 presents primary credentials (and thereby establishes a new single sign-on session).
90 It has not required arguments.
94 * template_name - template name for page with successful logout message (default is 'cas/logout.html')
99 It checks the validity of a Service ticket. It is part of the CAS 1.0 protocol and thus does
100 not handle proxy authentication.
105 -------------------------
107 It checks the validity of a Service Ticket and returns an XML-fragment response via CAS 2.0 protocol.
112 -------------------------
114 It checks the validity of a Proxy Ticket and returns an XML-fragment response via CAS 2.0 protocol.
119 -------------------------
120 Creates a proxy ticket for a given Proxy Granting Ticket.
125 CUSTOM USER ATTRIBUTES FORMAT
126 ===========================
128 Custom attribute format style may be changed in project settings with
129 CAS_CUSTOM_ATTRIBUTES_FORMAT constant. You can provide your own formatter callback
130 or specify existing in this package in `attribute_formatters` module.
132 Attribute formatter callback takes two arguments:
134 * `auth_success` - `cas:authenticationSuccess` node. It is `lxml.etree.SubElement`instance;
135 * `attrs` - dictionary with user attributes received from callback specified in
136 CAS_CUSTOM_ATTRIBUTES_CALLBACK in project settings.
138 Example of generated XML below::
140 <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
141 <cas:authenticationSuccess>
142 <cas:user>jsmith</cas:user>
144 <!-- extended user attributes wiil be here -->
146 <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
147 </cas:authenticationSuccess>
148 </cas:serviceResponse>
151 * Name-Value style (provided in `cas_provider.attribute_formatters.name_value`)::
153 <cas:attribute name='attraStyle' value='Name-Value' />
154 <cas:attribute name='surname' value='Smith' />
155 <cas:attribute name='givenName' value='John' />
156 <cas:attribute name='memberOf' value='CN=Staff,OU=Groups,DC=example,DC=edu' />
157 <cas:attribute name='memberOf' value='CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu' />
160 * Jasig Style attributes (provided in `cas_provider.attribute_formatters.jasig`)::
163 <cas:attraStyle>Jasig</cas:attraStyle>
164 <cas:surname>Smith</cas:surname>
165 <cas:givenName>John</cas:givenName>
166 <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
167 <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>
171 * RubyCAS style (provided in `cas_provider.attribute_formatters.ruby_cas`)::
173 <cas:attraStyle>RubyCAS</cas:attraStyle>
174 <cas:surname>Smith</cas:surname>
175 <cas:givenName>John</cas:givenName>
176 <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
177 <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>