SAML2 authentication for Zope
Project description
Introduction
hl.pas.samlplugin provides a SAML2 plugin for Zope’s PluggableAuthService. It provides the IExtractionPlugin, IAuthenticationPlugin, IChallengePlugin, ICredentialsResetPlugin interfaces.
hl.pas.samlplugin so far has been tested with OpenAM.
Installation
Add the package to your buildout
Install xmlsec
Run buildout
Restart Zope
Visit your site’s Pluggable Auth Service in ZMI and add a SAML2 PAS plugin
Configuration
You will need to provide your IDP with an endpoint configuration for your Zope site containing your sites’ settings for AssertionConsumerService and SingleLogoutService. This will be an XML file looking like e.g:
<EntityDescriptor entityID="http://zopehost:8080/spEntityID" xmlns="urn:oasis:names:tc:SAML:2.0:metadata"> <SPSSODescriptor AuthnRequestsSigned="false" WantAssertionsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol"> <SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="http://zopehost:8080/site/logout" ResponseLocation="https://zopehost:8080/site/logout"/> <NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</NameIDFormat> <AssertionConsumerService isDefault="true" index="0" Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="http://zopehost:8080/site"/> </SPSSODescriptor> <RoleDescriptor xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:query="urn:oasis:names:tc:SAML:metadata:ext:query" xsi:type="query:AttributeQueryDescriptorType" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol"> </RoleDescriptor> </EntityDescriptor>
At the moment the bindings specified in the above example (i.e. HTTP-Redirect for the SingleLogoutService and HTTP-POST for the AssertionConsumerService) are the only ones that are supported. For the authentication request, HTTP-Redirect is used.
Please refer to available SAML2 documentation for further information.
On the SAML2 PAS plugins’ properties tab, you will need to specify some more properties to make things work:
the absolute path to the IDP config file. This XML file should be provided by your IDP
the service endpoint URL, i.e. http://zopehost:8080/site in the example above
the service endpoint entity id as given to the IDP
the AuthnContextClass to use with the authentication request
the service URL binding to use for the passive session check
the absolute path to the xmlsec executable
the attribute provided by the IDP that should be used as the users login attribute (i.e. the user id used by Zope)
additional user properties given by the IDP that should be stored in the users session
Please have a look in the browser and the skins/auth subdirectories for examples on how to handle login/logout for a CMFSite.
It seems important to note that this PAS plugin (and the SAML2 protocol) only provides authentication. It is rather likely that you will have to implement your own plugins to provide the IPropertiesPlugin and the IUserEnumerationPlugin interfaces, at least if you have to deal with user generated content or want to use the Zope CMF.
Credits
Most of the code in the saml2 subfolder was taken from the pysaml2 package.
Changelog
1.3 (2015-03-02)
keywords
1.2 (2015-02-24)
added parts of the pysaml2 library (https://github.com/rohe/pysaml2) in subdirectory “saml2” to fix dependency issues with repoze.who and current Zope versions
changed license from GPL to Apache 2.0
the “passive”, “active” and “checksession” methods now take an optional parameter to override the default AuthnContextClass (from properties) on a per request basis
1.1 (2014-06-04)
pop SAMLart from request form to prevent endless redirect in certain cases
handle artifact response encoding correctly
updated keywords
1.0 (2014-04-22)
fix test
0.9 (2014-04-17)
added support for artifact service url binding
0.8 (2013-11-25)
added support for AuthnContextClass
0.7.1 (2013-09-06)
require pysaml2 == 1.0.2 (1.0.3 not working)
0.7 (2013-08-19)
Python 2.6 compatibility
0.6 (2013-08-16)
use pysaml2 >= 1.0
0.5 (2013-07-24)
fixed configuration caching issue (when using multiple plugins)
0.4 (2013-07-04)
improved config caching
add sample data for unittests
0.3 (2013-07-02)
add icon
0.2 (2013-07-02)
fix MANIFEST.in
0.1 (2013-07-02)
initial release
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