[pkg-cryptsetup-devel] Bug#536415: Bug#536415: cryptsetup: opening LUKS partitions takes several seconds

[Jonas Meurer]

hello,

On 17/08/2009 Marcus Better wrote:
> >> cryptsetup: opening LUKS partitions takes several seconds
> > 
> > This is probably due to PBKDF2 itself and should also manifest with 
> > crypto mappings created after the systems is up.
> 
> Oh. Can the this be tuned somehow?
> 
> What could explain the difference between my two nearly identical
> laptops (Thinkpad R60 and T61), where the slower one takes noticeably
> less time to unlock the partitions?

as jan already wrote, cipher, hashtype, keysize and last but not least
the keyslot used to unlock the device have impact on the time that
luksOpen takes. also the --iter-time option to luksFormat does make a
change here.

the issue is known upstream and is being worked on:
http://code.google.com/p/cryptsetup/issues/detail?id=25
http://code.google.com/p/cryptsetup/source/detail?r=84

greetings,
 jonas