[Bug 324871] [NEW] cryptsetup: Cannot delete a Keyslot from itselfs

[Pierre Dinh-van]

Public bug reported:

Binary package hint: cryptsetup

lsb_release -rd :
Description:	Ubuntu 8.04.2
Release:	8.04

apt-cache policy cryptsetup :
cryptsetup:
  Installed: 2:1.0.5-2ubuntu12
  Candidate: 2:1.0.5-2ubuntu12
  Version table:
 *** 2:1.0.5-2ubuntu12 0
        500 http://archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

The bug I reported for debian (etch/lenny) also exists under debian
hardy.

see : http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513596

It is not possible to "suicide" a luks encrypted disk, however it is a
"feature" (there is a warning message before doing that)

This is the output that explains the problem :

root at computer:~# cryptsetup luksFormat /dev/loop0 key0.bin

WARNING!
========
This will overwrite data on /dev/loop0 irrevocably.

Are you sure? (Type uppercase yes): YES
Command successful.
root at computer:~# cryptsetup luksAddKey --key-file key0.bin /dev/loop0 key1.bin 
key slot 0 unlocked.
Command successful.
root at computer:~# cryptsetup luksDelKey --key-file key0.bin /dev/loop0 0
key slot 0 unlocked.
No remaining key available with this passphrase.
Command failed.
root at computer:~# cryptsetup luksDelKey --key-file key0.bin /dev/loop0 1
key slot 0 unlocked.
Command successful.
root at computer:~# cryptsetup luksDelKey --key-file key0.bin /dev/loop0 0

WARNING!
========
This is the last keyslot. Device will become unusable after purging this key.

Are you sure? (Type uppercase yes): YES
key slot 0 unlocked.
No remaining key available with this passphrase.
Command failed.


A patch solving this issue for hardy is attached

** Affects: cryptsetup (Ubuntu)
     Importance: Undecided
         Status: New

-- 
cryptsetup: Cannot delete a Keyslot from itselfs
https://bugs.launchpad.net/bugs/324871
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