AlmaLinux OS 9 must use the CAC smart card driver.

Smart card login provides two-factor authentication stronger than that provided by a username and password combination.

Smart cards leverage public key infrastructure to provide and verify credentials.

Configuring the smart card driver in use by the organization helps to prevent users from using unauthorized smart cards.

Satisfies: SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058

Verify that AlmaLinux OS 9 loads the CAC driver with the following command:

$ grep card_drivers /etc/opensc.conf

card_drivers = cac;

If "cac" is not listed as a card driver, or there is no line returned for "card_drivers", this is a finding.

Configure AlmaLinux OS 9 to load the CAC driver.

Add or modify the following line in the "/etc/opensc.conf" file:

card_drivers = cac;