The TYPO3 extension, 'srijan_aselectauth' utilizes native TYPO3 hooks to authenticate TYPO3 users against A-Select. A custom socket based API for A-Select abstracts the communication between A-Select and the extension. Since the API itself is TYPO3 independent, this can be easily used in non-TYPO3 scenarios as well. Apart from authentication, the extension has some other features:

• The extension can synchronize (one-way) A-Select AuthSP users with TYPO3 during authentication.
• Alternatively, if we have generic users with no need for unique identity, the extension can map them to a single TYPO3 user.
• The extension uses 'invisible' authentication by default i.e. the user will know that they are being authenticated by A-Select only by analyzing the URL string. However, the option exists to make authentication via the AuthSP visible to the user, in order to comply with environments where user trust is critical e.g. credit card transactions, etc.

The extension has been partially sponsored by the Delft University of Technology (www.tudelft.nl). The extension can be found in the TYPO3 TER.