Pars Enterprise GNU/Linux

By admin, 2 April, 2020

GNU/Linux Edition Encryption

Pars Enterprise GNU/Linux edition full platform encryption method including Boot system and password on the top with physical token.

Using LVM Method

Pars Enterprise GNU/Linux edition full encryption with EXT filesystem

Required package:

cryptsetup-initramfs: disk encryption support - initramfs integration

Default values for the current existing customized operating system:

### loading Linux operating system from live environment

# /dev/sdx-current (root-ext4-100GB)

# /dev/sdx-current (home-btrfs-100GB)

Creating temporary folders to clone the current volumes and moving home:

# mkdir /mnt/temp0 /mnt/temp1 /mnt/backup

Mounting the current root, home and backup volumes:

# mount /dev/sdx(root) /mnt/temp0

# mount /dev/sdx(home) /mnt/temp1

# mount /dev/sdx(backup) /mnt/backup

Moving the current home folder contents before cloning:

# mv /mnt/temp0/home/* /mnt/temp1

Unmounting the current root and home volumes after moving:

# umount /dev/sdx(root) /dev/sdx(home)

Cloning the current custom, root and home volumes:

# fsarchiver savefs /mnt/backup/image.fsa /dev/sdx1 /dev/sdx2 /dev/sdx3

Unmounting backup volume after cloning:

# umount /dev/sdx(backup)

Removing created folders when volumes were unmounted successfully:

# rm -rf /mnt/temp0 /mnt/temp1 /mnt/backup

Full formatting storage before encryption:

# dd if=/dev/urandom of=/dev/sda bs=1M (optional)

Performing the partitioning scenario after full formatting:

# sdx1 (memory-ext2-boot)

# sda1 (bios_grub) cleared 1MB EF02 hidden

# sda2 (lvm) cleared 100% 8E00 hidden

# /dev/mapper/PEOSG-swapvol (swap-32GB)

# /dev/mapper/PEOSG-rootvol (ext4-100GB)

# /dev/mapper/PEOSG-homevol (ext4-100%)

Starting platform encryption with the following parameters:

# cryptsetup -v -c aes-xts-plain64 -s 256 -h sha256 -i 5000 --use-random luksFormat /dev/sda2(--type luks1 (after Format - for supporting grub2))

# cryptsetup luksOpen /dev/sda2 system

Managing logical volumes before restoration:

# pvcreate /dev/mapper/system

# vgcreate PEOSG /dev/mapper/system

# lvcreate -L 32G PEOSG -n swapvol

# lvcreate -L 100G PEOSG -n rootvol

# lvcreate -l +100%FREE PEOSG -n homevol

Formatting created logical volumes with the following types:

# mkswap /dev/mapper/PEOSG-swapvol

# mkfs.ext4 /dev/mapper/PEOSG-rootvol

# mkfs.btrfs /dev/mapper/PEOSG-homevol

Creating temporary folders to restore cloned volumes and chrooting:

# mkdir /mnt/root /mnt/home /mnt/backup /mnt/token

Mounting backup volume before restoration:

# mount /dev/sdx(backup) /mnt/backup

Restoring cloned volumes to created logical volumes:

# fsarchiver restfs /mnt/backup/image.fsa id=0,dest=/dev/mapper/PEOSG-rootvol id=1,dest=/dev/mapper/PEOSG-homevol

Mounting restored volumes for the modifications:

# swapon /dev/mapper/PEOSG-swapvol

# mount /dev/mapper/PEOSG-rootvol /mnt/root

# mount /dev/mapper/PEOSG-homevol /mnt/home

Mounting prepared volume for using it as physical token:

# mount /dev/sdx(token) /mnt/token

Generating physical token and adding it to the current encrypted storage:

# dd if=/dev/urandom of=/mnt/token/.PEOST bs=1024 count=4

# chmod 000 /mnt/token/.PEOST

# cryptsetup luksAddKey /dev/sda2 /mnt/token/.PEOST

Chrooting the current new created root volume:

# mount -t proc none /mnt/root/proc

# mount -t sysfs none /mnt/root/sys

# mount --bind /dev /mnt/root/dev

# chroot /mnt/root /bin/bash

Changing user password for the current new restored operating system:

# passwd root

# passwd (username)

Editing fstab entries with the following contents:

# nano /etc/fstab

# /dev/mapper/PEOSG-rootvol / ext4 defaults 0 1

# /dev/mapper/PEOSG-homevol /home ext4 defaults 0 2

# /dev/mapper/PEOSG-swapvol none swap sw 0 0

Editing crypttab entries with the following contents:

# nano /etc/crypttab

# system UUID=(sda2 by blkid command) /dev/disk/by-label/BOOT:.PEOST luks,nofail,tries=3,timeout=180,verify,keyscript=/lib/cryptsetup/scripts/passdev

Editing initramfs entries with the following modules:

# nano /etc/initramfs-tools/modules

# dm-crypt dm-mod aes-x86_64 xts sha256

Editing grub entries with the following contents:

# nano /etc/default/grub

# GRUB_CMDLINE_LINUX="cryptdevice=UUID=(sda2 by blkid command):system"

# GRUB_ENABLE_CRYPTODISK=y

# GRUB_PRELOAD_MODULES="cryptodisk luks lvm"

Editing swap entries with the following contents:

# nano /etc/initramfs-tools/conf.d/resume (replacing UUID to the current active swap by lvdisplay command)

# nano /etc/uswsusp.conf (replacing UUID to the current active swap by lvdisplay command)

Updating initramfs and grub configurations via:

# update-initramfs -k all -u -v

# grub-mkconfig -o /boot/grub/grub.cfg

# grub-install /dev/sda

# update-grub /dev/sda

Clearing command line interface history and exiting:

# history -cw

Or

# cat /dev/null > ~/.bash_history && history -c && exit

Changing boot folder permission for the new current restored operating system:

# chmod 000 /mnt/root/boot

Unmounting filesystems after modifications:

# umount /mnt/root/proc

# umount /mnt/root/sys

# umount /mnt/root/dev

# umount /dev/mapper/PEOSG-rootvol

# umount /dev/mapper/PEOSG-homevol

# umount /dev/sdx(backup)

# umount /dev/sdx(token)

Removing created folders when volumes were unmounted successfully:

# rm -rf /mnt/root /mnt/home /mnt/backup /mnt/token

Closing the new current encrypted storage and rebooting:

# cryptsetup luksClose /dev/sda2 system

# sync && reboot

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