#!/bin/sh
# created January 03, 2005
# create and mount an encrypted file system on loop back device loop0
# will not mount the c: drive
#

/sbin/modprobe blowfish
/sbin/modprobe cryptoloop

# size in k for new device
# 5000000=5Gig
SIZE=5000000
# where to mount
MPOINT="/home/user/mount"

df | grep loop0
if [ "$?" = "0" ]
then
   echo loop0 is in use
   exit
fi

if [ ! -f file.crypt ]
then
  echo file.crypt not found.  creating...
  # this can take a few minutes if a multi gig file is being created
  dd if=/dev/zero of=file.crypt bs=1024 count=$SIZE
  NEW=1
fi

/sbin/losetup -e blowfish /dev/loop0 ./file.crypt
if [ "$?" = "1" ]
then
   echo "loopback setup failed"
   exit
fi

if [ "$NEW" = "1" ] 
then
   echo new filesystem.  formating device to ${SIZE}k.
   /sbin/mkfs -t ext2 /dev/loop0 $SIZE
fi

mount /dev/loop0 $MPOINT

echo
echo mount information:
df -h | grep $MPOINT
echo