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#!/bin/sh
#
# Generate authentication key for booth
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
DFLT_AUTHFILE=/etc/booth/authkey
KEYSIZE=64
# /dev/urandom should be good enough
RND_SRC=/dev/urandom
usage() {
cat<<EOF
usage: $0 [-h] [auth-file]
EOF
exit
}
error() {
echo "ERROR: $*" >&2
}
fatal() {
error $*
exit 1
}
case "$1" in
"-h"|"--help"|"-?") usage;;
/*|"") : ;;
*) fatal "please use absolute path for the key file" ;;
esac
keyf=${1:-$DFLT_AUTHFILE}
if test -f $keyf; then
fatal "file $keyf already exists"
fi
umask 077
errout=`dd if=$RND_SRC of=$keyf bs=$KEYSIZE count=1 2>&1`
rc=$?
if [ $rc -ne 0 ]; then
echo "$errout" >&2
exit $rc
fi
chown root:root $keyf
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