pam_panic is a PAM module that protects sensitive data and provides a panic function for emergency situations.
You can choose from one of two options:
There are two removable media which work as keys: the auth key and the panic key. The auth key will let you pass to the password prompt whereas the panic key, if provided, will securely erase the LUKS header, rendering the data unreadable.
There are two passwords you are able to set: the key password and the panic password. The key password will let you pass to the original password prompt whereas the panic password, if provided, will securely erase the LUKS header, rendering the data unreadable.
There is
- pam_panic - Actual releases and
- pam_panic-git for this actual git repository.
There's a PPA updating for new releases.
To install the package using the PPA:
sudo add-apt-repository ppa:bandie/pampanic
sudo apt-get update
sudo apt-get install pampanic
You will need GCC or similar, as well as the PAM headers. Some distributions package the PAM headers as libpam0g-dev.
Also you need dialog, autoconf and gettext. Some also need autopoint.
To compile and install it, do the following within the project's root directory:
$ [ ! -e ./configure ] && autoreconf -i
$ ./configure
$ make
$ sudo make installNote: the paths of the reboot, poweroff, and cryptsetup commands are passed to the module at compile-time.
If you want to use removable media you'll need two GPT-formatted removable storage devices, and said devices must have at least one partition. Here's an example fdisk session, showing how this might be accomplished:
$ 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): wYou'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.
The more easy way is to run pam_panic_config.
The hard way:
To configure the module, add the following to the appropriate PAM configuration file(s): (see pam.conf(5) for details on these files)
auth requisite /usr/local/lib/security/pam_panic.so auth=<UUID> reject=<UUID> reboot serious=<UUID>
account requisite /usr/local/lib/security/pam_panic.so
auth requisite /usr/local/lib/security/pam_panic.so password reboot serious=<UUID>
account requisite /usr/local/lib/security/pam_panic.so
To set your passwords run pam_panic_pw as root in your preferred shell.
See man 8 pam_panic and man 1 pam_panic_pw for more information.
If you want to be sure to have your memory clear of all information when issuing a reboot/shutdown
you might want to add the options page_poison=on and slub_debug=P to your kernel arguments.
For GRUB2 you just append it on your GRUB_CMDLINE_LINUX entry in /etc/default/grub and then issue a rebuild
of the GRUB2 config: grub-mkconfig -o /boot/grub/grub.cfg
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