Fixed SDDM fingerprint not working.

- Added a new custom flake input of pam_fprintd_grosshack so it accepts either password or fingerprint

modules/configuration.nix

@@ -13,6 +13,7 @@
   host,
   version,
   system,
+  pam-fprint-grosshack-pkg,
   ...
 }: {
   #Assign Swap to the PC
@@ -313,14 +314,28 @@
     sudo.wheelNeedsPassword = false;
 
     pam.services = {
-      sddm.fprintAuth = false; #Because of the bug with 30 seconds on sddm login
-      sddm-autologin.fprintAuth = false; #Same as above
       login.fprintAuth = false;
       sudo.fprintAuth = false; #Disabled because of security risk: https://nvd.nist.gov/vuln/detail/cve-2024-37408
       kscreenlocker.fprintAuth = true;
       polkit-1.fprintAuth = false; #Disabled because of security risk: https://nvd.nist.gov/vuln/detail/cve-2024-37408
       kde.fprintAuth = false;
       hyprlock = {};
+
+      sddm = {
+        fprintAuth = false; # prevent NixOS from adding its own pam_fprintd block
+
+        text = lib.mkForce ''
+          auth sufficient ${pam-fprint-grosshack-pkg}/lib/security/pam_fprintd_grosshack.so
+          auth sufficient pam_unix.so try_first_pass nullok
+          auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so
+
+          account required pam_unix.so
+          password required pam_deny.so
+
+          session required pam_unix.so
+          session optional ${pkgs.systemd}/lib/security/pam_systemd.so
+        '';
+      };
     };
   };