mirror of
https://github.com/Llewellynvdm/Tomb.git
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387 lines
11 KiB
Bash
Executable File
387 lines
11 KiB
Bash
Executable File
#!/bin/zsh
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#
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# Tomb, the Crypto Undertaker
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#
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# a tool to easily operate file encryption of private and secret data
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#
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# Copyleft (C) 2007-2011 Denis Roio <jaromil@dyne.org>
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#
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# This source code is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This source code is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# Please refer to the GNU Public License for more details.
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#
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# You should have received a copy of the GNU Public License along with
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# this source code; if not, write to:
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# Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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# startup wrapper to open tombs
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TOMBEXEC="tomb"
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if [ "$0" = "./tomb-open" ]; then
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TOMBEXEC="$PWD/tomb"
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fi
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# includes all shell functions in tomb
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source $TOMBEXEC source
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try() {
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which ${1} > /dev/null
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if [ $? = 0 ]; then
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return 0
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else
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return -1
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fi
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}
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# popup notification
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tomb-notify() {
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which notify-send > /dev/null
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if [ $? != 0 ]; then return 1; fi
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# look for our icon in common prefixes
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if [ -r /usr/share/pixmaps/monmort.xpm ]; then icon=/usr/share/pixmaps/monmort.xpm
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elif [ -r /usr/share/icons/monmort.xpm ]; then icon=/usr/share/icons/monmort.xpm
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elif [ -r /usr/local/share/pixmaps/monmort.xpm ]; then icon=/usr/local/share/pixmaps/monmort.xpm
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elif [ -r /usr/local/share/icons/monmort.xpm ]; then icon=/usr/local/share/icons/monmort.xpm
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elif [ -r /opt/share/pixmaps/monmort.xpm ]; then icon=/opt/share/pixmaps/monmort.xpm
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elif [ -r /sw/share/pixmaps/monmort.xpm ]; then icon=/sw/share/pixmaps/monmort.xpm
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fi
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if [ -z $1 ]; then
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notify-send -i $icon \
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-u low -h string:App:Tomb \
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"Tomb version $VERSION" \
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"Hi, I'm the Undertaker.
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Let's start setting your Crypt?"
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else
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notify-send -i $icon ${@}
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fi
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}
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# USB plug auto detect using dmesg
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# tested on ubuntu 10.04 and debian 6.0
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# please test and patch on other systems if you can.
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# TODO: use udev rules, see how archlinux folks document it:
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# https://wiki.archlinux.org/index.php/System_Encryption_with_LUKS_for_dm-crypt
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# here we could modularize the choice of methods using function pointers,
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# so that they are configurable when calling tomb.
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ask_usbkey() {
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unset usbkey_mount
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say "Waiting 1 minute for a usb key to connect"
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act -n "please insert your usb key "
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tomb-notify "Insert your USB KEY" \
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"Tomb is waiting 30 seconds for you to insert an external key."
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plugged=false
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c=0
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while [ "$plugged" != "true" ]; do
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dmesg | tail -n 12 | grep -q 'new.*USB device'
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if [ $? = 0 ]; then plugged=true; fi
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echo -n "."
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sleep .5
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c=`expr $c + 1`
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if [ $c -gt 60 ]; then
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echo
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die "timeout"
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fi
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done
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echo
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act -n "usb key inserted, attaching "
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c=0
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attached=false
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while [ "$attached" != "true" ]; do
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dmesg | tail -n 12| grep -q 'Attached.*removable disk'
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if [ $? = 0 ]; then attached=true; fi
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echo -n "."
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sleep .5
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c=`expr $c + 1`
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if [ $c -gt 30 ]; then
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echo
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export usbkey_mount=none
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die "timeout"
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fi
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done
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echo
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act -n "usb attached, opening "
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# get the first partition
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# usbpart=`dmesg |tail -n 12 | grep ' sd.:' |cut -d: -f2 |tr -d ' '`
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for i in $(seq 1 10); do
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usbpart=$(dmesg | tail -n 12 | sed '/ sd.:/!d;s/^.*: \(sd.[0-9]*\)/\1/')
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if [ -n "$usbpart" ]; then
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break
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elif [ $i -eq 10 ]; then
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die "timeout" 1
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else
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echo -n .
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sleep 1
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fi
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done
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mtmp=`$TOMBEXEC mktemp tomb`
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sudo mount /dev/$usbpart $mtmp
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if [ $? = 0 ]; then
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usbmount=$mtmp
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else
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die "cannot mount usbkey partition $usbmount"
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fi
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echo
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act "usb key mounted on $usbmount"
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usbkey_mount=$usbmount
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return 0
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}
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launch_status() {
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# calculates the correct arguments to launch tomb-status tray
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# applet; it takes the tomb name as an argument and should be
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# launched after a successful tomb mount.
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if ! [ $1 ]; then
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die "cannot launch status tray applet: we don't even know the name of our tomb."
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fi
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if [ $DISPLAY ]; then
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tombname=${1}
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tombbase=`basename $tombname`
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tombmap=`mount -l | awk "/\[${tombbase}\]\$/"' { print $1 } '`
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tombmount=`mount -l | awk "/\[${tombbase}\]\$/"' { print $3 } '`
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if [ -x ./tomb-status ]; then # launch from build dir
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./tomb-status $tombmap $tombname $tombmount &!
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else
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which tomb-status > /dev/null
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if [ $? = 0 ]; then
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tomb-status $tombmap $tombname $tombmount &!
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fi
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fi
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fi
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}
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# got an argument
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if [ $1 ]; then # is it a file?
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tombdir=`dirname $1`
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tombfile=`basename $1`
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tombname=${tombfile%%\.*}
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if [ -f ${tombdir}/${tombfile} ]; then
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# is it a luks partition
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file ${tombdir}/${tombfile} | grep -i LUKS > /dev/null
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if [ $? = 0 ]; then # tomb is a valid LUKS file
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if [ -r ${tombdir}/${tombname}.tomb.key ]; then
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tombkey=${tombdir}/${tombname}.tomb.key
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else
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ask_usbkey
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if ! [ $usbkey_mount ]; then # no usb key was mounted
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die "key not provided for tomb $tombname: operation aborted" 1
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else # usb mounted, check key presence
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if [ -r ${usbkey_mount}/.tomb/${tombname}.tomb.key ]; then
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tombkey=${usbkey_mount}/.tomb/${tombname}.tomb.key
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elif [ -r ${usbkey_mount}/.tomb ]; then
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die "we can't find the right key, have a look yourself:\n$(ls -lha ${usbkey_mount}/.tomb)" 1
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else
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die "there are no keys stored in your usb" 1
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fi
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fi
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fi
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if ! [ ${tombkey} ]; then # just to be sure
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die "key not found, operation aborted." 1
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else
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"${TOMBEXEC}" mount -k ${tombkey} ${tombdir}/${tombfile}
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success=$?
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fi
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if [ $usbkey_mount ]; then
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sudo umount ${usbkey_mount}
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rmdir ${usbkey_mount}
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unset usbkey_mount
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fi
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if [ $success = 0 ]; then # mount was succesfull (with password and all)
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launch_status ${tombname}
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exit 0
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else
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tomb-notify "Tomb cannot open." "Are you knocking the wrong door?"
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exit 1
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fi
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else
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tomb-notify "Not a real Tomb." "We found no real bones in there, or the tomb file permissions won't allow us in."
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exit 1
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fi
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elif [ -d $1 ]; then # its a directory
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# FIXME: somehow xdg-open loses mailcap mimes when executed by tomb-status
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# try xdg-open; if [ $? = 0 ]; then xdg-open ${1}; exit 0; fi
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try gnome-open; if [ $? = 0 ]; then gnome-open ${1}; exit 0; fi
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try thunar; if [ $? = 0 ]; then thunar ${1}; exit 0; fi
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try pcmanfm; if [ $? = 0 ]; then pcmanfm ${1}; exit 0; fi
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try rox; if [ $? = 0 ]; then rox ${1}; exit 0; fi
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try fsviewer; if [ $? = 0 ]; then fsviewer ${1}; exit 0; fi
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# try xnc; if [ $? = 0 ]; then xnc ${1}; exit 0; fi
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tomb-notify "File manager not found." "Tomb cannot guess which filemanager you are using"
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exit 1
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fi
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fi
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# no argument but on graphical display: creation dialog
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if [ "$1" != "wizard" ]; then
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if [ -z $DISPLAY ]; then
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no "tomb-open is a wrapper for the command 'tomb'"
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no "type 'tomb-open wizard' if you want to be guided"
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"${TOMBEXEC}" help
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exit 1
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fi
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fi
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# no arguments: start guided tomb creation
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tomb-notify
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# we do it on the desktop by default
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if [ -r $HOME/Desktop ]; then
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cd $HOME/Desktop;
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# or inside HOME
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else cd $HOME; fi
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say "Tomb - simple commandline tool for encrypted storage"
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say "version $VERSION ($DATE) by Jaromil @ dyne.org"
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say "Guided creation of a new Tomb"
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cat <<EOF
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A Tomb is a special folder that keeps files safe using a password:
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it makes use of strong encryption and helps you keep the keys on a
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separate USB storage for safer transports.
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Inside a Tomb you can store private informations without fear that
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other people possessing it will discover your secrets, unless they
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have your USB key and your password.
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If you choose to proceed now, we'll guide you through the creation
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of a new Tomb.
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If you will, I'll be your Crypto Undertaker.
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Do you want to proceed, Master? (y/n)
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EOF
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echo -n "> "
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read -q
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if [ "$?" != 0 ]; then
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die "Operation aborted" 1
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fi
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# let's proceed
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say "Please type in the name for your new tomb file:"
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echo -n "> "
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read -u 1 tombname
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say "How big you want the Tomb to be?"
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act "Type a size number in Megabytes:"
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echo -n "> "
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read -u 1 tombsize
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if [[ "$tombsize" != <-> ]]; then
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die "Only digit allowed! Operation aborted"
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fi
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clear
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say "You have commanded the creation of this Tomb:"
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act "$tombname ( $tombsize MBytes )";
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echo
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cat <<EOF
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Please confirm if you want to proceed now:
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You will need the super-user (sudo) password for the computer you
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are using, as well time available.
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Depending how big your tomb will be, make sure you are not running
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low on batteries.
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If you are remotely connected to a server, make sure to use a
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detachable screen.
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Considering 1GB takes usually little less than an hour to be digged.
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EOF
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say " Digging will take quite some time! Should we start? (y/n)"
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echo -n "> "
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read -q
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if [ $? != 0 ]; then
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die "Operation aborted." 1
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fi
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cat <<EOF
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Operation confirmed! we will now call the undertaker to do its job,
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but in order to do so you will need to provide your sudo password:
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EOF
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tombfile=${tombname}.tomb
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"${TOMBEXEC}" create --ignore-swap -s $tombsize ${tombfile}
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if [ $? != 0 ]; then
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die "An error occurred creating tomb, operation aborted."
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fi
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tomb-notify "The Tomb is ready!" "We will now open your new Tomb for the first time."
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cat <<EOF
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Would you like to save the key on an external usb device?
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This is recommended for safety:
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Always keep the key in a different place than the door!
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If you answer yes, you'll need a USB KEY now: (y/n)
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EOF
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# tomb-notify "Tomb has forged a key." "Would you like to save it on USB?"
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echo -n " > "
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read -q
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if [ $? = 0 ]; then
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ask_usbkey
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if [ ${usbkey_mount} ]; then
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sudo mkdir -m 0700 -p ${usbkey_mount}/.tomb
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sudo cp -v ${tombfile}.key ${usbkey_mount}/.tomb/
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sudo chmod -R go-rwx ${usbkey_mount}/.tomb
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yes "${tombname}.key succesfully saved on your USB"
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act "now we'll proceed opening your brand new tomb"
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"${TOMBEXEC}" open -k ${tombfile}.key ${tombfile}
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if [ $? = 0 ]; then
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launch_status ${tombname}
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fi
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rm -f ${tombfile}.key
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sudo umount ${usbkey_mount}
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rmdir ${usbkey_mount}
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unset usbkey_mount
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exit 0
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fi
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fi
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cat <<EOF
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Impossible to save the key on USB.
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We recommend to preserve the key in a separate place! You can move
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it yourself later, place it in a hidden directory named .tomb inside
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the first partition of an usb key.
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EOF
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"${TOMBEXEC}" open -k ${tombname}.tomb.key ${tombfile}
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if [ $? = 0 ]; then
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launch_status ${tombname}
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fi
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exit 0
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