- A Cloud Guru
Create and Mount an Encrypted Block Device Using dm-crypt
In this lab you will create an encrypted block device using `dm-crypt` and LUKS. Then you will open the encrypted device and create a filesystem on it. You are working as a System Administrator at a large financial institution and have been tasked with enabling whole-disk encryption on a portable drive. The portable drive is attached as `/dev/loop0` to the user's workstation, which is running the CentOS Linux 7.7 operating system.
Table of Contents
Create an Encrypted Volume on the Target Device
Create an encrypted volume on the target device:
$ sudo cryptsetup luksFormat /loopbackfile.img
Open the Encrypted Volume
Open the encrypted volume:
$ sudo cryptsetup luksOpen /dev/loop0 encvol $ ls /dev/mapper/ -l
Create a Filesystem on the Encrypted Volume
Create a filesystem on the encrypted volume:
$ sudo mkfs.ext4 /dev/mapper/encvol $ sudo mount /dev/mapper/encvol /mnt/
Unmount the Filesystem and Close the Encrypted Volume
Unmount the filesystem and close the encrypted volume:
$ sudo umount /mnt/ $ sudo cryptsetup luksClose encvol
Create a Keyfile and Add It to the Encrypted Volume
Create a keyfile and add it to the encrypted volume:
$ sudo dd if=/dev/urandom of=/root/lukskey bs=4096 count=1 $ sudo chmod 600 /root/lukskey $ sudo cryptsetup luksAddKey /dev/loop0 /root/lukskey
Open the Encrypted Volume Using the Keyfile and Mount the Filesystem
Open the encrypted volume using the keyfile and mount the filesystem:
sudo cryptsetup luksOpen /dev/loop0 encvol --key-file /root/lukskey sudo mount /dev/mapper/encvol /mnt/
What's a lab?
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