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#!/bin/sh
# vim: expandtab
#
# Copyright (C) Matthieu Patou <mat@matws.net> 2010
#
#
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
name="ktpass.sh"
TEMP=$(getopt -o h --long princ:,pass:,out:,host:,ptype:,enc:,path-to-ldbsearch: \
-n "$name" -- "$@")
eval set -- "$TEMP"
usage()
{
echo -ne "$name --out <keytabfile> --princ <principal> --pass <password>|*\n"
echo -ne " [--host hostname] [--enc <encryption>]\n"
echo -ne " [--ptype <type>] [--path-to-ldbsearch <path>]\n"
echo -ne "\nEncoding should be one of:\n"
echo -ne " * des-cbc-crc\n"
echo -ne " * des-cbc-md5\n"
echo -ne " * rc4-hmac (default)\n"
echo -ne " * aes128-cts\n"
echo -ne " * aes256-cts\n"
exit 0
}
while true; do
case "$1" in
--out)
outfile=$2
shift 2
;;
--princ)
princ=$2
shift 2
;;
--pass)
pass=$2
shift 2
;;
--host)
host=$2
shift 2
;;
--ptype) shift 2 ;;
--enc)
enc=$2
shift 2
;;
--path-to-ldbsearch)
path="$2/"
shift 2
;;
-h) usage ;;
--)
shift
break
;;
*)
echo "Internal error!"
exit 1
;;
esac
done
#RC4-HMAC-NT|AES256-SHA1|AES128-SHA
if [ -z "$enc" ]; then
enc="rc4-hmac"
fi
if [ -z "$path" ]; then
path=$(dirname $0)/../bin/
if [ ! -f ${path}ldbsearch ]; then
path=$(dirname $0)/../../bin/
fi
fi
if [ -z "$outfile" -o -z "$princ" -o -z "$pass" ]; then
echo "At least one mandatory parameter (--out, --princ, --pass) was not specified"
usage
fi
if [ -z $host ]; then
host=$(hostname)
fi
kvno=$(${path}ldbsearch -H ldap://$host "(|(samaccountname=$princ)(serviceprincipalname=$princ)(userprincipalname=$princ))" msds-keyversionnumber -k 1 -N 2>/dev/null | grep -i msds-keyversionnumber)
if [ x"$kvno" = x"" ]; then
echo -ne "Unable to find kvno for principal $princ\n"
echo -ne " check that you are authentified with kerberos\n"
exit 1
else
kvno=$(echo $kvno | sed 's/^.*: //')
fi
if [ "$pass" = "*" ]; then
echo -n "Enter password for $princ: "
stty -echo
read pass
stty echo
echo ""
fi
ktutil >/dev/null <<EOF
add_entry -password -p $princ -k $kvno -e $enc
$pass
wkt $outfile
EOF
if [ $? -eq 0 ]; then
echo "Keytab file $outfile created with success"
else
echo "Error while creating the keytab file $outfile"
fi
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