pam_fprintd - PAM module to authenticate against fprintd, the fingerprint daemon

fprintd was written by Bastien Nocera.

       The pam_fprintd module is used to verify a user's fingerprints against fingerprints enrolled using
       fprintd, the fingerprint management daemon.

       The PAM stack is by design a serialised authentication, so it is not possible for  pam_fprintd  to  allow
       authentication through passwords and fingerprints at the same time.

       It  is  up to the application using the PAM services to implement separate PAM processes and run separate
       authentication stacks separately. This is the way multiple authentication methods are made  available  to
       users of gdm for example.

       pam_fprintd - PAM module to authenticate against fprintd, the fingerprint daemon

debugdebug=[on|off|true|false|1|0]
               Whether debug should be turned on or off. Debug messages will be generated using pam_syslog which
               means that they will be saved in the systemd journal by default.

       max-tries=MAX_TRIES
               The  number  of  attempts at fingerprint authentication to try before returning an authentication
               failure. The minimum number of tries is 1 while the default is 3.

               Use a negative value to set no limit at all, so that the module  won't  ever  error  on  multiple
               retries, but in such case it's suggested for the module loader to handle this.

       timeout=TIMEOUT
               The amount of time before returning an authentication failure. The default timeout is 30 seconds,
               with 1 second being the minimum.

               Use  a  negative  value to set no limit at all, so that fingerprint authentication will be always
               active while this module is loaded.

fprintd, PAM

freedesktop                                        2025-04-02                                     pam_fprintd(8)

pam_fprintd.so [debug|debug=[on|off|true|false|1|0]] [max-tries=MAX_TRIES] [timeout=TIMEOUT]