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#!/bin/sh
# FILE: passwdehd -- Changes a user's efsk.
# AUTHOR: W. Michael Petullo <mike@flyn.org>
# DATE: 06 October 2002
#
# Copyright (C) 2002 W. Michael Petullo <mike@flyn.org>
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
CONF=/etc/security/pam_mount.conf
USAGE="[OPTION]...
-h, -? print this message"
while :;
do case "$1" in
-h | "-?" )
echo -e usage: ${0##*/} "$USAGE" >&2
exit 1 ;;
-?* )
echo "${0##*/}: unrecognised option: $1" >&2
exit 1 ;;
* )
break ;;
esac
shift
done
if [ ! -z $1 ]; then
USER=$1
fi
if [ ! -f $CONF ]; then
echo "${0##*/}: $CONF is missing"
exit 1
fi
REGEX="^volume $USER"
CIPHER=`grep "$REGEX" $CONF | awk '{ print $8 }'`
KEYPATH=`grep "$REGEX" $CONF | awk '{ print $9 }'`
if [ ! -f $KEYPATH.old -a $UID != 0 ]; then
echo "${0##*/}: $KEYPATH.old does not yet exist and you can't create it"
exit 1
fi
if [ -z $OLD_EFSK_PASSWORD ]; then
echo -n "(current) EFSK password: "
stty -echo > /dev/tty
read OLD_EFSK_PASSWORD < /dev/tty; echo
stty echo > /dev/tty
fi
if [ -z $NEW_EFSK_PASSWORD ]; then
echo -n "New EFSK password: "
stty -echo > /dev/tty
read NEW_EFSK_PASSWORD < /dev/tty; echo
echo -n "Retype new EFSK password: "
read VERIFY < /dev/tty; echo
if [ ${NEW_EFSK_PASSWORD} != ${VERIFY} ]; then
echo "Sorry, passwords do not match"
stty echo > /dev/tty
exit 1
fi
stty echo > /dev/tty
fi
export OLD_EFSK_PASSWORD
export NEW_EFSK_PASSWORD
cp $KEYPATH $KEYPATH.old
openssl enc -d -$CIPHER -pass env:OLD_EFSK_PASSWORD -in $KEYPATH | openssl enc -$CIPHER -pass env:NEW_EFSK_PASSWORD > /tmp/passwdehd.$$
cp /tmp/passwdehd.$$ $KEYPATH # Don't use mv because of permission issues.
rm /tmp/passwdehd.$$
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