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|
#!/bin/sh
# Open Infrastructure: service-tools
# Copyright (C) 2014-2022 Daniel Baumann <daniel.baumann@open-infrastructure.net>
#
# SPDX-License-Identifier: GPL-3.0+
#
# 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 <https://www.gnu.org/licenses/>.
set -e
PROJECT="open-infrastructure"
SOFTWARE="service-tools"
PROGRAM="ssh-keycheck"
Parameters ()
{
GETOPT_LONGOPTIONS="bits:,filename:,help,type:,verbose,"
GETOPT_OPTIONS="b:,f:,h,t:,v,"
PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${PROGRAM} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
if [ "${?}" != "0" ]
then
echo "'${PROGRAM}': getopt exit" >&2
exit 1
fi
eval set -- "${PARAMETERS}"
while true
do
case "${1}" in
-b|--bits)
BITS="${2}"
shift 2
;;
-f|--filename)
FILES="${2}"
shift 2
;;
-h|--help)
HELP="true"
shift 1
;;
-t|--type)
TYPES="${2}"
shift 2
;;
-v|--verbose)
VERBOSE="true"
shift 1
;;
--)
shift 1
break
;;
*)
echo "'${PROGRAM}': getopt error" >&2
exit 1
;;
esac
done
}
Usage ()
{
echo "Usage: ${PROGRAM} -f KEY_FILE[,KEY_FILE] [-b BITS[,BITS]] [-t TYPE[,TYPE]]" >&2
echo
echo "See ${PROGRAM}(1) and ${SOFTWARE}(7) for more information."
exit 1
}
Parameters "${@}"
if [ -z "${FILES}" ] || [ -n "${HELP}" ]
then
Usage
fi
EXIT="0"
for FILE in ${FILES}
do
if [ ! -e "${FILE}" ]
then
echo "'${FILE}': no such key file" >&2
exit 1
fi
# Run
SSH_KEYGEN="$(ssh-keygen -l -f "${FILE}" 2>&1 || true)"
KEY_TYPE="$(echo "${SSH_KEYGEN}" | awk '{ print $NF }' | sed -e 's|(||' -e 's|)||' | tr '[A-Z]' '[a-z]')"
KEY_BITS="$(echo "${SSH_KEYGEN}" | awk '{ print $1 }')"
case "${KEY_TYPE}" in
dsa|ecdsa|ecdsa-sk|ed25519|ed25519-sk|rsa)
;;
*)
case "${VERBOSE}" in
true)
echo "'${FILE}': invalid key file" >&2
;;
esac
KEY_TYPE="unknown"
EXIT="1"
;;
esac
if [ "${KEY_TYPE}" != "unknown" ] && [ -n "${TYPES}" ]
then
case "${KEY_TYPE}" in
$(echo ${TYPES} | sed -e 's|,| |g'))
;;
*)
echo "'${FILE}': wrong type ('${KEY_TYPE}' instead of '${TYPES}')" >&2
EXIT="1"
;;
esac
fi
if [ "${KEY_TYPE}" != "unknown" ] && [ -n "${BITS}" ]
then
case "${KEY_BITS}" in
$(echo ${BITS} | sed -e 's|,| |g'))
;;
*)
echo "'${FILE}': wrong bits ('${KEY_BITS}' instead of '${BITS}')" >&2
EXIT="1"
;;
esac
fi
case "${EXIT}" in
0)
case "${VERBOSE}" in
true)
cat << EOF
filename: ${FILE}
bits: ${KEY_BITS}
type: ${KEY_TYPE}
EOF
;;
esac
;;
esac
done
exit "${EXIT}"
|
