Hi,

As my first statement to the creators of fprint, I would like to 
congratulate you on creating and maintaining this much needed library.

I'm currently using libfprint to authenticate users in a system where 
the data is stored in a central database. This seems to be an overlooked 
use-case of libfprint, as I cannot seem to find a way (in the 
documentation or examples) to validate fingerprints from data stored in 
a database.

The process of enrollment is only done once for a user and the 
fingerprint (or minutiae) data is stored in a database. When a user 
later tries to login at _any terminal_ running client software, the new 
scanned data is used to validate against all fingerprint data in the 
database. The enrollment process of libfprint is thus skipped and 
handled by my application itself. I emphasize the fact that logins are 
not necessarily done on the same computer where the user was enrolled.

Ideally I would like to be able to scan a fingerprint from my 
application and match it against the fingerprint data in my database. 
This would require me to either have the scan and verify functions 
separate, or to have a way for my program to enroll all data in the 
database into its local gallery without having any actual scans performed.

Is there any way for me to achieve this behavior, or would I have to 
consider the major architectural changes needed to work with libfprint 
as documented?


Thanks in regards,

Walter
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