FS#52306 : Cryptsetup encrypts two partition when it should only encrypt one

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FS#52306 - Cryptsetup encrypts two partition when it should only encrypt one

Attached to Project: Arch Linux
Opened by vespid (vespid) - Thursday, 29 December 2016, 17:33 GMT
Last edited by Doug Newgard (Scimmia) - Friday, 06 January 2017, 16:43 GMT

Task Type	Bug Report
Category	Packages: Core
Status	Closed
Assigned To	No-one
Architecture	x86_64
Severity	Medium
Priority	Normal
Reported Version
Due in Version	Undecided
Due Date	Undecided
Percent Complete
Votes	0
Private	No

Details

Description:
I have encountered a bug when trying to create an encrypted boot partition for use on an EFI system. I create both necessary partitions and instruct cryptsetup to encrypt only one. Both of them end up encrypted with the same passphrase.

Steps to reproduce:

1. Create a 512M EFI partition using gdisk
2. Create a 1G Linux filesystem partition using gdisk
3. Encrypt the 1G partition using cryptsetup eith a serpent-cbc-essiv:256 cipher and a tiger2 hash
4. Attempt to mount the efi partition. The filesystem type is listed as crypto_LUKS
5. Attempt to unlock the efi partition. The passphrase is the same as the one used for the partition that should be encrypted.