HP-UX AAA Server A.08.00.01 Administrator's Guide

information on AATV writing, compiling, installing, and debugging, see Chapter 28
(page 437).
You can configure EAP-SIM and EAP-AKA to support pseudonyms. To perform a full
authentication using pseudonym, you must map an assigned pseudonym to the real
identity. EAP-SIM and EAP-AKA can manage the pseudonym mapping internally.
Alternatively, using customer-supplied plug-ins, they can store the mapping in an
external database using SQL Access and retrieve, when required. In accordance with
the RFCs, the HP-UX AAA Server must save at least two pseudonyms: the last one
used by the peer and the last one assigned by the HP-UX AAA Server. If you save the
attributes in an external database, the database record must include the following
attributes:
• Real-Username
• Real-Realm
• Last-Used-Pseudonym-Username
• Last-Used-Pseudonym-Expiration-Time
• Last-Assigned-Pseudonym-Username
• Last-Assigned-Pseudonym-Expiration-Time
These attributes are described as follows:
The database can also include the authentication information and the reply items. The
AATV, which retrieves the mapping information, must look for a match for the
Last-Used-Pseudonym-Username attribute or the
Last-Assigned-Pseudonym-Username attribute.
The AATV, which retrieves the mapping information, can check whether the matching
field has expired. If the mapping retrieval AATV checks for expiration, the
corresponding expiration time attribute need not be placed on the
AUTHREQ_REPLY_QUEUE list of the authreq. If the mapping retrieval AATV is not
configured to check for expiration, the expiration time attributes must be placed in the
authreq. Consequently, the EAP-SIM or the EAP-AKA AATV, which handles the
result of the lookup, checks for expiration.
If you write your own AATVs, which are necessary if an external database is employed,
a set of input attributes in the AUTHREQ_REPLY_QUEUE list of the authreq can be
used by the AATVs. Also, a set of returned attributes, that the lookup AATV adds to
the AUTHREQ_REPLY_QUEUE list of the authreq to interface with the HP-UX AAA
Server, can be used by the AATVs.
There are two AATVs involved in pseudonym handling. One AATV performs the
lookup and the other performs the update. This section describes the following AATVs:
• “Pseudonym Database Update AATV” (page 259)
• “Pseudonym Database Lookup AATV” (page 260)
258 Configuring EAP-SIM and EAP-AKA Authentication Methods