using encryption with FC2

[Alexander Dalloz]

Am Mo, den 08.11.2004 schrieb pouet pouet um 10:57:

> I wonder how to use encryption with FC2.
> crypto-api seems to be included and it is possible to mount a loop device 
> with an encryption filter with (losetup -e )but there is no real how-to.

Did you google?

> How-to choose key length ?
> What kind of algoryhtm is available ...

ls /lib/modules/$(uname -r)/kernel/crypto/

Has all available kernel cryptomodules.

> How-to use encrypt and mount a partition ???

modprobe cyrptoloop
modprobe twofish (as example)

dd if=/dev/urandom of=$HOME/cryptedfile bs=1M count=96

losetup -e twofish /dev/loop0 $HOME/cryptedfile

mkfs -t ext2 -m0 /dev/loop0

losetup -d /dev/loop0

chown user:user $HOME/cryptedfile

example fstab entry:
/home/user/cryptedfile	/home/user/cryptedmount		ext2	defaults,noauto,loop,encryption=twofish,user	0 0

To mount the encrypted space of 96MB create first the mountpoint "mkdir
/home/user/cryptedmount" and then run "mount /home/user/cryptedmount".

Alexander


-- 
Alexander Dalloz | Enger, Germany | new address - new key: 0xB366A773
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Fedora GNU/Linux Core 2 (Tettnang) on Athlon kernel 2.6.8-1.521smp 
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