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Knowledge Base

Locks screen automatically on smart card removal on Ubuntu 18.4, 16.4, SLED12SP3, SLES12SP3 and SLED11SP4 (71068)

Last Updated: 7/19/2019Categories: TroubleshootingTotal Views: 21656Language:
Chinese (Simplified)JapaneseEnglish

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Symptoms

Redhat support screen lock on card removal, user could enable this option on the authentication setup UI, but Ubuntu 18.4, 16.4, SLED12SP3, SLES12SP3 and SLED11SP4 don't support this. So we have this workaround to enable screen lock on card removal on Ubuntu and SLED.

Cause

Ubuntu 18.4, 16.4, SLED12SP3, SLES12SP3 and SLED11SP4 Do Not support screen lock on smart card removal.

Resolution

By default, Ubuntu 18.4, 16.4, SLED12SP3, SLES12SP3 and SLED11SP4 Do Not support screen lock on smart card removal.

If you want to lock screen after smartcard removal, use pkcs11_eventmgr. For example, on ubuntu 18.4:

apt-get install gnome-screensaver.

vi /etc/pam_pkcs11/pkcs11_eventmgr.conf:

pkcs11_eventmgr {
# Run in background? Implies debug=false if true
daemon = true;

# show debug messages?
debug = false;

# polling time in seconds
polling_time = 1;

# expire time in seconds
# default = 0 ( no expire )
expire_time = 0;

# pkcs11 module to use
pkcs11_module = /usr/lib/libcmP11.so;

#
# list of events and actions
# Card inserted
event card_insert {
# what to do if an action fail?
# ignore : continue to next action
# return : end action sequence
# quit : end program
on_error = ignore ;

# You can enter several, comma-separated action entries
# they will be executed in turn
action = "gnome-screensaver-command --poke";
}

# Card has been removed
event card_remove {
on_error = ignore;
action = "gnome-screensaver-command --lock";
}

# Too much time card removed
event expire_time {
on_error = ignore;
action = "/bin/false";
}
}

Run the following command in terminal.

/usr/bin/pkcs11_eventmgr &

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