[Mageia-dev] unable to mount encrypted partitions created with drakdisk

Thu Mar 29 03:40:36 CEST 2012

2012/3/29 simple w8 <simplew8 at gmail.com>:
+> 2012/3/21 David W. Hodgins <davidwhodgins at gmail.com>:
+>> On Tue, 20 Mar 2012 20:57:47 -0400, simple w8 <simplew8 at gmail.com> wrote:
+>>
+>>> Hi,
+>>>
+>>> I use sometimes to boo Windows, and if i need some file i use to mount
+>>> my /home encrypted partition using FreeOTFE (or TrueCrypt) to access
+>>> the files i need, but i saw today that the /home partition that was
+>>> created in mageia is not possible to mount with FreeOTFE or TrueCrypt.
+>>>
+>>> But the /home partition created with mandriva drakdisk can be mounted
+>>> with those 2 applications, so seams that Mageia drakdisk isnt doing
+>>> something right.
+>>
+>>
+>> That's likely a result of
+>> https://bugs.mageia.org/show_bug.cgi?id=3092
+>>
+>> With the default settings, cryptsetup uses cbc mode encryption,
+>> which makes it much more likely that it can be cracked.
+>>
+>> See http://clemens.endorphin.org/nmihde/nmihde-A4-os.pdf
+>> for an explanation of how this is done.
+>>
+>> In Mageia's diskdrake, the setting is overridden to use xts mode,
+>> instead of cbc mode.
+>
+> Something is not right, Free-OTFE says is does support xts but its not
+> being able to mount the partitions encrypted in Mageia, what can be
+> the cause?
+>
+> You may see the FreeOTFE supported cypher modes here:
+> http://www.freeotfe.org/docs/Main/Linux_volumes.htm
+
+I have been looking to the supported cyphers and hashes in FreeOTFE
+and i see that the cypher XTS with keysize 512 is not supported,
+however supports keysizes 128,192,256 and 1024.
+
+You have chosen thekeysize 512 thats the one is not supported under
+the FreeOTFE project...
+Isnt possible to change the keysize to a value that can be supported
+under Windows?
+