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zeroth
Tux's lil' helper
Joined: 27 Feb 2006
Posts: 128
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 Posted: Fri Jul 22, 2011 2:30 pm Post subject: unencrypting on a different system fails |
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I've had this happen before: an encrypted volume will unencrypt with losetup and mount fine on the system it was encrypted on, but on another will instead bail with "must specify file system type" ( usually meaning a bad password, but not the case here ).
the first time this happened was after a large system update, and I was able to chroot from a previous system backup and successfully unencrypt. now I am in the same predicament but have no previous system backup to chroot into.
I've got the encrypted medium (a file) and the correct password and I know the encryption method, but cant unencrypt. so what can I do? whats the issue here?
with the wrong password I always get this:
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mount -oencryption=aes file /mnt/tmp
Password:
mount: you must specify the filesystem type
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but with the correct password, it does this instead:
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mount -oencryption=aes file /mnt/tmp
Password:
mount: wrong fs type, bad option, bad superblock on /dev/loop1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
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and this is what dmesg has to say when I use the correct password:
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init_special_inode: bogus i_mode (166236) for inode loop0:8
EXT3-fs (loop0): error: invalid journal inode
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there are text files on the encrypted medium which would show by doing a `cat /dev/loop0 | strings -n 10` but it shows nothing intelligible. the unencryption is just plain not working like it should... |
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zeroth
Tux's lil' helper
Joined: 27 Feb 2006
Posts: 128
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| Posted: Fri Jul 22, 2011 3:04 pm Post subject: |
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another interesting bit, after losetup'ing to loop0 with correct password:
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cat /dev/loop0 > tst
file tst
tst: Linux rev 1.0 ext3 filesystem data, UUID=d0830430-7237-4dcd-8b68-c9e35c46916d
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zeroth
Tux's lil' helper
Joined: 27 Feb 2006
Posts: 128
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| Posted: Sat Jul 23, 2011 7:20 pm Post subject: |
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| still unresolved |
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zeroth
Tux's lil' helper
Joined: 27 Feb 2006
Posts: 128
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| Posted: Mon Jul 25, 2011 4:41 am Post subject: |
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| bump |
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