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Zend Framework: Zend_Auth_Adapter_Cas Component Proposal

Table of Contents

1. Overview

Zend_Auth_Adapter_Cas is authentication adapter for CAS (Central Authentication Service) single-sign on protocol.

Central Authentication Service project, more commonly referred to as CAS. CAS is an authentication system originally created by Yale University to provide a trusted way for an application to authenticate a user.

2. References

• JA-SIG Central Authentication Service
• Central Authentication Service (at Wikipedia)

3. Component Requirements, Constraints, and Acceptance Criteria

• This component will implement Zend_Auth_Adapter_Interface.
• This component will authenticate CAS ticket against CAS server.
• This component will return Zend_Auth_Result::SUCCESS when CAS ticket is valid.
• This component will return Zend_Auth_Result::FAILURE when CAS ticket is invalid.
• This component must support optional SSL / TLS encrypted transport.
• This component will not handle user redirects.
• This component will not save any data.

4. Dependencies on Other Framework Components

• Zend_Http_Client
• simplexml_load_string with support for namespaces:

5. Theory of Operation

CAS authentication is typically handled by a remote server.

6. Milestones / Tasks

This CAS authentication adapter is capable of working with CAS versions 1, 2 and 3

• Milestone 1: [DONE] Initial proposal published for review.
• Milestone 2: [DONE] Working prototype and some examples.
• Milestone 3: [DONE] Working prototype checked into the incubator supporting use cases.
• Milestone 4: Unit tests exist, work, and are checked into SVN.
• Milestone 5: Initial documentation exists.

7. Class Index

• Zend_Auth_Adapter_Cas

8. Use Cases

Load parameters from Zend_Config:

cas.ini

or load directly:

Authenticate in an action

Standalone instance for non-MVC environments

9. Class Skeletons

http://framework.zend.com/svn/framework/standard/incubator/library/Zend/Auth/Adapter/Cas.php