Hi all,
and thanks a lot for your work.
I'm a happy user of cryptsetup.
I need to store hospital data, and I would like to use a big key
file.
Well, I checked for compile limits (Ubuntu 12.10)
$ cryptsetup --help|grep -i maximum
Maximum keyfile size: 8192kB, Maximum interactive passphrase length 512 (characters)
Anyway, if I check with the simple script under, it seems cryptsetup ignore
everything where $size > 32.
What I am doing wrong?
Thanks a lot for your time,
A.
------------
#!/bin/bash
fdloopback="/tmp/loopback.dd"
fdkey="/tmp/key_master"
fdkeytmp="/tmp/key"
cryptname="keytest"
dd if=/dev/zero of=$fdloopback bs=1G count=0 seek=1
nettle-lfib-stream | dd of=$fdkey bs=1K count=8192 iflag=fullblock
losetup /dev/loop0 $fdloopback
cryptsetup create $cryptname /dev/loop0 --key-file $fdkey
mkfs.ext4 -q /dev/mapper/$cryptname -F
sync
cryptsetup remove $cryptname
losetup -d /dev/loop0
for size in $(seq 2 2 8192)
do
dd if=$fdkey of=$fdkeytmp bs=1 count=$size
losetup /dev/loop0 $fdloopback
cryptsetup create $cryptname /dev/loop0 --key-file $fdkeytmp
fsck /dev/mapper/$cryptname && echo "------> Good, " $size || echo "------> Bad, " $size
sync
cryptsetup remove $cryptname
losetup -d /dev/loop0
echo "Enter to go on";read trash
done
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