LUKS-OPs

What is Luks-Ops?

A bash script to automate the most basic usage of LUKS and Cryptsetup in Linux.

Like:

• Creating a virtual disk volume with LUKS format.
• Mounting an existing LUKS volume
• Unmounting a Single LUKS volume or all LUKS volume in the system.
• Creating a LUKS encrypted filesystem on removable disks (like USBs)

What Luks-Ops is not?

• A replacement for LUKS or Cryptsetup.

Why I started writing this script?

• To encrypt my files on Dropbox
• To encrypt some files on my VPS
• To have fun..

Basic Usage

There is an option for a menu:

luks-ops.sh menu

Other options include:

1) luks-ops.sh new DISKNAME 512
2) luks-ops.sh mount /path/to/device MOuntPoint
3) luks-ops.sh unmount-all 
4) luks-ops.sh clean
5) luks-ops.sh usage

1. Will create a virtual-disk named DISKNAME with size 512 MB
2. Will mount device at MountPoint
3. Will unmount all luks volume mounted
4. Will clean all unfinished setups incase of errors (But I recommend using 4)
5. Will print help message

Default Options:

• Virtual-disk size = 512 MB and it's created on /usr/ directory
• Default filesystem used = ext4
• Cipher options:
  • Creating LUKS1: aes-xts-plain64, Key: 256 bits, LUKS header hashing: sha1, RNG: /dev/urandom
  • plain: aes-cbc-essiv:sha256, Key: 256 bits, Password hashing: ripemd160 (about-time 😄)
• Mounting point = /media/luks_* where * is random-string.
• Others.. NB. You can change /dev/urandom to /dev/zero (speed?)

Dependencies (Install applications:)

1. dmsetup -- low level logical volume management
2. cryptsetup -- manage plain dm-crypt and LUKS encrypted volumes

NB: Run as root.

But make sure you read the man pages and other online Doc about LUKS

• man cryptsetup (or cryptsetup --help)
• man dmsetup

TODO

1. Support for multiple user keys
2. Remote unlocking LUKS encrypted LVM
3. ZSH completion
4. [ Include other user requests here ]

Read..

The LUKS website at http://code.google.com/p/cryptsetup/

The cryptsetup FAQ, contained in the distribution package and online at http://code.google.com/p/cryptsetup/wiki/FrequentlyAskedQuestions

The cryptsetup mailing list and list archive, see FAQ entry 1.6.

The LUKS on-disk format specification available at http://code.google.com/p/cryptsetup/wiki/Specification