#!/bin/sh

SEC_DRIVE=$1
SEC_MOUNT=$2
ENC_PARTITION=$3
ENC_MOUNT=$4

[ ! -e $ENC_PARTITION ] && { echo "encrypted partition not found"; exit 1; }

mkdir -p $SEC_MOUNT
mount $SEC_DRIVE $SEC_MOUNT
NAME=`hostname`
ID=`cat /private/id.txt` # id.txt is zeroed out

DATA="${NAME}${ID:0:3}"
echo "cryptsetup: opening $ENC_PARTITION"
echo -n $DATA | openssl sha1 | awk '{print $NF}' | cryptsetup open $ENC_PARTITION part
mkdir -p $ENC_MOUNT
mount /dev/mapper/part $ENC_MOUNT