cinnamon-udev-locker

Lock Cinnamon desktop session through device status (i.e YubiKey)

Usage

Run in INIT mode with an empty YAML configuration:

> touch ~/.config/cinnamon-udev-locker/config.yml > cinnamon-udev-locker --init

This will print out all available properties for a UDev event. With a YubiKey just plug it in after executing the above steps and it will output something like this:

add: * ACTION: add * BUSNUM: 003 * DEVNAME: /dev/bus/usb/003/030 * DEVNUM: 030 * DEVPATH: /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1 * DEVTYPE: usb_device * DRIVER: usb * ID_BUS: usb * ID_FOR_SEAT: usb-pci-0000_00_14_0-usb-0_1_1 * ID_MODEL: Yubikey_4_U2F+CCID * ID_MODEL_ENC: Yubikeyx204x20U2F+CCID * ID_MODEL_FROM_DATABASE: Yubikey 4 U2F+CCID * ID_MODEL_ID: 0406 * ID_PATH: pci-0000:00:14.0-usb-0:1.1 * ID_PATH_TAG: pci-0000_00_14_0-usb-0_1_1 * ID_REVISION: 0427 * ID_SERIAL: Yubico_Yubikey_4_U2F+CCID * ID_SMARTCARD_READER: 1 * ID_SMARTCARD_READER_DRIVER: gnupg * ID_USB_INTERFACES: :030000:0b0000: * ID_VENDOR: Yubico * ID_VENDOR_ENC: Yubico * ID_VENDOR_FROM_DATABASE: Yubico.com * ID_VENDOR_ID: 1050 * MAJOR: 189 * MINOR: 285 * PRODUCT: 1050/406/427 * SEQNUM: 3746 * SUBSYSTEM: usb * SYSTEMD_WANTS: smartcard.target * TAGS: :uaccess:systemd:seat: * TYPE: 0/0/0 * USEC_INITIALIZED: 359396531717

You can now create rules in the config file based on the above attributes and their values. Values are matched against regular expressions to provide more felxibility.

To have the screen locked when a YubiKey is disconnected and to activate the password prompt to unlock the screen once it is reconnected, use the following rule in ~/.config/cinnamon-udev-locker/config.yml:

--- - devices:

• ID_VENDOR: ^Yubico$ ID_MODEL: ^Yubikey.*

add: wakeup remove: lock

It is possible to define more than one rule with different behaviours. To have a second device that only activates the password prompt on connect but does not lock the screen on disconnect just append to the YAML list of rules:

--- - devices:

• ID_VENDOR: ^Yubico$ ID_MODEL: ^Yubikey.*

add: wakeup remove: lock

• devices: - ID_VENDOR: ^ACME$

  ID_MODEL_FROM_DATABASE: ^Detonator$

  add: wakeup

Afterwards make sure to have cinnamon-udev-locker automatically started for your Cinnamon session.

Installation

pip install cinnamon-udev-locker

Requirements

• click
• click-log
• pygobject
• pyxdg

Compatibility

This script was written for Python3 only.

Licence

Published under MIT/Expat license.

Authors

cinnamon-udev-locker was written by Michael Fladischer.