pam_panic

Purpose

The pam_panic PAM module shall protect people who have value data on their computer. It provides a panic function.

How it works

There exist a good and a bad flash drive. The good flash drive will let you pass to the password prompt. The bad flash drive will execute a reboot, poweroff and/or erase the luksHeader which will make your luksContainer undecryptable to anyone.

Installation

You need gcc or something similar. To compile and install it you may want to do the following within this project directory:

make
sudo make install

Compiling notes

The Makefile passes the pathes of reboot, poweroff and cryptsetup using macros to be sure that it will run on different machines. You need libpam's development package. Some call them libpam0g-dev.

Preparation

You need two GPT formatted removable devices. There must be at least one partition on it. Here is an example with fdisk:

$ sudo fdisk /dev/sdc

Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): g
Created a new GPT disklabel (GUID: AAAAAAAA-AAAA-AAAA-AAAA-AAAAAAAAAAAA).

Command (m for help): n
Partition number (1-128, default 1): 
First sector (2048-15661022, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-15661022, default 15661022): 

Created a new partition 1 of type 'Linux filesystem' and of size 7.5 GiB.
Command (m for help): w

You'll find the UUID of your partition in /dev/disk/by-partuuid/. You can find out which device is which typing ls -l /dev/disk/by-partuuid/ in your favourite shell.

Integration

To let it integrate with your system, add the following at the top of of your pam.d config(s):

auth       requisite    pam_panic.so auth=<UUID> reject=<UUID> reboot serious=<UUID>
account    requisite    pam_panic.so

See man 8 pam_panic for more.

TODO

• Asking for man page translations.
• Integrate panic password(?)