[dm-crypt] LUKS header cksum?

Two Spirit twospirit6905 at gmail.com
Fri Jul 20 20:25:13 CEST 2012


I was wondering if there is a checksum on the LUKS header? I didn't read
the whole thing, but a quick look at
the
http://wiki.cryptsetup.googlecode.com/git/LUKS-standard/on-disk-format.pdf
specs, seems to only have
a checksum of the master-key, not of the whole header.

When I found my corruption, the cryptsetup seemed to work fine and nothing
indicated to me that there was some corruption.
I didn't run isLuks to see what that would have said. Evidently there was
enough information around to consider the LUKS was
there, and keep the running system working OK, but not enough to recognize
that there was corruption and that my
passphrases wouldn't work.
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