Just added Item 2.20 to the FAQ for this. Regards, Arno On Wed, Feb 10, 2016 at 22:50:14 CET, Arno Wagner wrote: > > I should probably update the FAQ with the information about the > "payload offset" field in a separate item. Maybe "How to overwrite > only the LUKS header". > > Keep in mind that much of the statements in the FAQ are still > in their first incarnation and quite a few things may lack > a simplified description, as I like to give the full story. > Hence I am grateful if anybody points out such shortcommings. > > Regards and thanks, > Arno > > > On Wed, Feb 10, 2016 at 21:29:07 CET, Sven Eschenberg wrote: > > Ah, I see. Well the FAQ gives alternatives and more information on > > the size of the header for different keylengths and so on. But as > > the header+keymaterial can hardly be bigger than the offset of the > > encrypted payload on the backing device a dd with > > count=payload-offset and bs=512 indeed does the trick. > > > > Of course you'd have to check the payload offset of that particular > > container and not mix any numbers etc. . > > > > Regards > > > > -Sven > > > > > > Am 10.02.2016 um 21:13 schrieb Michael Kjörling: > > >On 10 Feb 2016 21:07 +0100, from sven@xxxxxxxxxxxxxxxxxxxxx (Sven Eschenberg): > > >>Yes, it will overwrite the header and potential free space after the > > >>header up to the first sector of encrypted data. > > >> > > >>Does this seem so weird? > > > > > >No, but given the somewhat roundabout way this was described in the > > >FAQ at least last I looked, this seems like a much easier way to > > >describe it... > > > > > _______________________________________________ > > dm-crypt mailing list > > dm-crypt@xxxxxxxx > > http://www.saout.de/mailman/listinfo/dm-crypt > > -- > Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx > GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 > ---- > A good decision is based on knowledge and not on numbers. -- Plato > > If it's in the news, don't worry about it. The very definition of > "news" is "something that hardly ever happens." -- Bruce Schneier > _______________________________________________ > dm-crypt mailing list > dm-crypt@xxxxxxxx > http://www.saout.de/mailman/listinfo/dm-crypt -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. -- Plato If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
