Someone

sysadm@diablo:~$ ll /lib/security/
total 460
-rw-r--r-- 1 root root 11564 2006-05-12 19:42 pam_access.so
-rw-r--r-- 1 root root  4996 2006-05-12 19:42 pam_debug.so
-rw-r--r-- 1 root root  2780 2006-05-12 19:42 pam_deny.so
-rw-r--r-- 1 root root 11628 2006-05-12 19:42 pam_env.so
-rw-r--r-- 1 root root 10684 2006-05-12 19:42 pam_filter.so
-rw-r--r-- 1 root root  2784 2006-05-11 13:50 pam_foreground.so
-rw-r--r-- 1 root root  5148 2006-05-12 19:42 pam_ftp.so
-rw-r--r-- 1 root root 11160 2006-05-12 19:42 pam_group.so
-rw-r--r-- 1 root root  7060 2006-05-12 19:42 pam_issue.so
-rw-r--r-- 1 root root  8328 2006-05-12 19:42 pam_lastlog.so
-rwxr-xr-x 1 root root 78809 2007-04-12 17:01 pam_ldap.so
-rw-r--r-- 1 root root 16048 2006-05-12 19:42 pam_limits.so
-rw-r--r-- 1 root root 12268 2006-05-12 19:42 pam_listfile.so
-rw-r--r-- 1 root root  4496 2006-05-12 19:42 pam_localuser.so
-rw-r--r-- 1 root root  9636 2006-05-12 19:42 pam_mail.so
-rw-r--r-- 1 root root 17124 2006-05-12 19:42 pam_mkhomedir.so
-rw-r--r-- 1 root root  4136 2006-05-12 19:42 pam_motd.so
-rw-r--r-- 1 root root  5692 2006-05-12 19:42 pam_nologin.so
-rw-r--r-- 1 root root  3080 2006-05-12 19:42 pam_permit.so
-rw-r--r-- 1 root root 11032 2006-05-12 19:42 pam_rhosts_auth.so
-rw-r--r-- 1 root root  3496 2006-05-12 19:42 pam_rootok.so
-rw-r--r-- 1 root root  6848 2006-05-12 19:42 pam_securetty.so
-rw-r--r-- 1 root root 11452 2006-05-12 19:42 pam_selinux.so
-rw-r--r-- 1 root root  5524 2006-05-12 19:42 pam_shells.so
-rw-r--r-- 1 root root  9596 2006-05-12 19:42 pam_stress.so
-rw-r--r-- 1 root root 13952 2006-05-12 19:42 pam_succeed_if.so
-rw-r--r-- 1 root root  9892 2006-05-12 19:42 pam_tally.so
-rw-r--r-- 1 root root  8484 2006-05-12 19:42 pam_time.so
lrwxrwxrwx 1 root root    11 2007-02-09 12:37 pam_unix_acct.so -> pam_unix.so
lrwxrwxrwx 1 root root    11 2007-02-09 12:37 pam_unix_auth.so -> pam_unix.so
lrwxrwxrwx 1 root root    11 2007-02-09 12:37 pam_unix_passwd.so -> pam_unix.so
lrwxrwxrwx 1 root root    11 2007-02-09 12:37 pam_unix_session.so -> pam_unix.so
-rw-r--r-- 1 root root 53084 2006-05-12 19:42 pam_unix.so
-rw-r--r-- 1 root root  8416 2006-05-12 19:42 pam_userdb.so
-rw-r--r-- 1 root root  4108 2006-05-12 19:42 pam_warn.so
-rw-r--r-- 1 root root  8096 2006-05-12 19:42 pam_wheel.so
-rw-r--r-- 1 root root 14100 2006-05-12 19:42 pam_xauth.so
sysadm@diablo:~$