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This page lists some changes to the EAP module that I'd like to do/see done to the EAP module:

Fully break out EAP-TLS code into libeaptls
This will allow modules that rely on EAP-TLS to each have their own SSL_CTX
The libeaptls code can look for the same option names in each module's config, allowing for modules to have different CA certificates, etc.
Allow multiple instances of each EAP type module to be configured
Allows for "EAP virtual hosting"
Modules will be called by their name2 just like other modules
Users can be made to use a certain list of modules (called by name2) by the presence of an Allowed-EAP-Types attribute in the config_items. This way, usera can be made to use peap_module_a while userb can be made to use peap_module_b, allowing for systems who may have different CA certs, etc.
This way, only one EAP module needs to be configured, but users can be made to use a different set of EAP options/types within the EAP module.
Implement "EAP Autz Wrapping"
The EAP module would call an autz block (configured in the EAP module configuration from within its code to perform authorization lookups
Allows the EAP module to perform both pre and post authorization functions, ie:
Add missing User-Name attribute before calling the autz block
By caching the request and output from the autz block, EAP processing can be optimized.
Allows us to call the autz block only once if non-EAP-related attributes don't change (Since all attributes should be present in the first request, only one autz call after the first request should be required in most cases)
Furthermore, this allows us to only have to make a single call to any external (LDAP, SQL, etc) databases instead of one per round trip in an EAP conversation, removing unnecessary calls and speeding up EAP authentications
Finally, Autz caching will also allow us to much more easily implement EAP Notifications based on Reply-Message attributes present in the Autz output
Alternative to "EAP Autz Wrapping"
Update the EAP handlers so that they set a flag when they expect that the *next* EAP packet from the client will require the username && password.
This matters most for the TLS types.
Looking at debug logs from various machines, the server finishes the TLS tunnel setup in one packet, and the next packet contains the data in the tunnel.
The TLS modules can have a flag "tunnel not done", and the EAP module can return "ok" (not currently used by eap autz) in the authorize section.
Then, configurable failover can do eap {ok = return} in authorize.
The modules needing to do DB lookups, etc. can be listed *after* the EAP module, which means that they won't be called until the TLS tunnel is set up