368 lines
10 KiB
Bash
Executable file
368 lines
10 KiB
Bash
Executable file
#!/bin/sh
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#
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# shellpki is a wrapper around openssl to manage a small PKI
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#
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set -eu
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init() {
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umask 0177
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if [ -f "${CADIR}/private.key" ]; then
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echo "${CADIR}/private.key already exists, do you really want to erase it ?\n"
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echo "Press return to continue..."
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read -r REPLY
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fi
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[ -d "${CADIR}" ] || mkdir -pm 0700 "${CADIR}"
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[ -d "${CADIR}/certs" ] || mkdir -m 0777 "${CADIR}/certs"
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[ -d "${CADIR}/tmp" ] || mkdir -m 0700 "${CADIR}/tmp"
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[ -f "${CADIR}/index.txt" ] || touch "${CADIR}/index.txt"
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[ -f "${CADIR}/serial" ] || echo "01" > "${CADIR}/serial"
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"${OPENSSL}" req \
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-config "${CONFFILE}" \
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-newkey rsa:4096 -sha512 \
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-x509 -days 3650 \
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-extensions v3_ca \
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-keyout "${CADIR}/private.key" \
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-out "${CADIR}/cacert.pem"
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}
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usage() {
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cat <<EOF
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Usage: ${0} <subcommand> [options] [CommonName]
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Initialize PKI (create CA key and self-signed cert) :
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${0} init
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Create a client cert with key and CSR directly generated on server
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(use -p for set a password on client key) :
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${0} create [-p] <commonName>
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Create a client cert from a CSR (doesn't need key) :
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${0} create -f <path>
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Revoke a client cert with is commonName (CN) :
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${0} revoke <commonName>
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List all actually valid commonName (CN) :
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${0} list [-a|v|r]
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EOF
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}
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error() {
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echo "${1}" >&2
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exit 1
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}
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warning() {
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echo "${1}" >&2
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}
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ask_ca_password() {
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[ ! -f "${CADIR}/private.key" ] && error "You must initialize your's PKI with shellpki init !"
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attempt=$((${1} + 1))
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[ "${attempt}" -gt 1 ] && warning "Invalid password, retry."
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trap 'unset CA_PASSWORD' 0
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stty -echo
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printf "Password for CA key : "
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read CA_PASSWORD
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stty echo
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printf "\n"
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[ "${CA_PASSWORD}" != "" ] || ask_ca_password "${attempt}"
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CA_PASSWORD="${CA_PASSWORD}" "${OPENSSL}" rsa \
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-in "${CADIR}/private.key" \
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-passin env:CA_PASSWORD \
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>/dev/null 2>&1 \
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|| ask_ca_password "${attempt}"
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}
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create() {
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from_csr=1
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with_pass=1
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while getopts ":f:p" opt; do
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case "$opt" in
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f)
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[ ! -f "${OPTARG}" ] && error "${OPTARG} must be a file"
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from_csr=0
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csr_file=$(readlink -f "${OPTARG}")
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shift 2;;
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p)
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with_pass=0
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shift;;
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:)
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error "Option -$OPTARG requires an argument."
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esac
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done
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cn="${1:-}"
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[ "${cn}" = "--" ] && shift
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if [ "${from_csr}" -eq 0 ]; then
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[ "${with_pass}" -eq 0 ] && warning "Warning: -p made nothing with -f"
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# ask for CA passphrase
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ask_ca_password 0
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# check if csr_file is a CSR
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"${OPENSSL}" req \
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-noout -subject \
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-in "${csr_file}" \
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>/dev/null 2>&1 \
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|| error "${csr_file} is not a valid CSR !"
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# check if csr_file contain a CN
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"${OPENSSL}" req \
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-noout -subject \
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-in "${csr_file}" \
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| grep -Eo "CN\s*=[^,/]*" \
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>/dev/null 2>&1 \
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|| error "${csr_file} don't contain a CommonName !"
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# get CN from CSR
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cn=$("${OPENSSL}" req -noout -subject -in "${csr_file}"|grep -Eo "CN\s*=[^,/]*"|cut -d'=' -f2|xargs)
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# check if CN already exist
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[ -f "${CADIR}/certs/${cn}.crt" ] && error "${cn} already used !"
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# ca sign and generate cert
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CA_PASSWORD="${CA_PASSWORD}" "${OPENSSL}" ca \
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-config "${CONFFILE}" \
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-in "${csr_file}" \
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-passin env:CA_PASSWORD \
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-out "${CADIR}/certs/${cn}.crt"
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else
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[ -z "${cn}" ] && usage >&2 && exit 1
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# check if CN already exist
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[ -f "${CADIR}/certs/${cn}.crt" ] && error "${cn} already used !"
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# ask for client key passphrase
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if [ "${with_pass}" -eq 0 ]; then
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trap 'unset PASSWORD' 0
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stty -echo
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printf "Password for user key : "
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read PASSWORD
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stty echo
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printf "\n"
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fi
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# ask for CA passphrase
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ask_ca_password 0
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# generate private key
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if [ "${with_pass}" -eq 0 ]; then
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PASSWORD="${PASSWORD}" "$OPENSSL" genrsa \
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-aes256 -passout env:PASSWORD \
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-out "${KEYDIR}/${cn}-${TIMESTAMP}.key" \
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2048 >/dev/null 2>&1
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else
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"$OPENSSL" genrsa \
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-out "${KEYDIR}/${cn}-${TIMESTAMP}.key" \
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2048 >/dev/null 2>&1
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fi
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if [ "${with_pass}" -eq 0 ]; then
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# generate csr req
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PASSWORD="${PASSWORD}" "$OPENSSL" req \
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-batch -new \
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-key "${KEYDIR}/${cn}-${TIMESTAMP}.key" \
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-passin env:PASSWORD \
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-out "${CSRDIR}/${cn}-${TIMESTAMP}.csr" \
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-config /dev/stdin <<EOF
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$(cat "${CONFFILE}")
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commonName_default = ${cn}
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EOF
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else
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# generate csr req
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"$OPENSSL" req \
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-batch -new \
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-key "${KEYDIR}/${cn}-${TIMESTAMP}.key" \
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-out "${CSRDIR}/${cn}-${TIMESTAMP}.csr" \
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-config /dev/stdin <<EOF
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$(cat "${CONFFILE}")
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commonName_default = ${cn}
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EOF
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fi
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# ca sign and generate cert
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CA_PASSWORD="${CA_PASSWORD}" "${OPENSSL}" ca \
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-config "${CONFFILE}" \
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-passin env:CA_PASSWORD \
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-in "${CSRDIR}/${cn}-${TIMESTAMP}.csr" \
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-out "${CADIR}/certs/${cn}.crt"
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# check if CRT is a valid
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"${OPENSSL}" x509 \
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-noout -subject \
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-in "${CADIR}/certs/${cn}.crt" \
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>/dev/null 2>&1 \
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|| rm -f "${CADIR}/certs/${cn}.crt"
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[ -f "${CADIR}/certs/${cn}.crt" ] || error "Error in CSR creation"
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# generate pem format
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cat "${CADIR}/certs/${cn}.crt" "${CADIR}/cacert.pem" "${KEYDIR}/${cn}-${TIMESTAMP}.key" >> "${PEMDIR}/${cn}-${TIMESTAMP}.pem"
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# generate pkcs12 format
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if [ "${with_pass}" -eq 0 ]; then
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PASSWORD="${PASSWORD}" "${OPENSSL}" pkcs12 -export -nodes -passin env:PASSWORD -passout env:PASSWORD -inkey "${KEYDIR}/${cn}-${TIMESTAMP}.key" -in "${CADIR}/certs/${cn}.crt" -out "${PKCS12DIR}/${cn}-${TIMESTAMP}.p12"
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else
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"${OPENSSL}" pkcs12 -export -nodes -passout pass: -inkey "${KEYDIR}/${cn}-${TIMESTAMP}.key" -in "${CADIR}/certs/${cn}.crt" -out "${PKCS12DIR}/${cn}-${TIMESTAMP}.p12"
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fi
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# generate openvpn format
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if [ -e "${PREFIX}/ovpn.conf" ]; then
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cat "${PREFIX}/ovpn.conf" > "${OVPNDIR}/${cn}-${TIMESTAMP}.ovpn" <<EOF
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<ca>
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$(cat "${CADIR}/cacert.pem")
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</ca>
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<cert>
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$(cat "${CADIR}/certs/${cn}.crt")
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</cert>
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<key>
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$(cat "${KEYDIR}/${cn}-${TIMESTAMP}.key")
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</key>
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EOF
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echo "The configuration file is available in ${OVPNDIR}/${cn}.ovpn"
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fi
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fi
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}
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revoke() {
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[ "${1}" = "" ] && usage >&2 && exit 1
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# get CN from param
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cn="${1}"
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# check if CRT exists
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[ ! -f "${CADIR}/certs/${cn}.crt" ] && error "Unknow CN : ${cn}"
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# check if CRT is a valid
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"${OPENSSL}" x509 -noout -subject -in "${CADIR}/certs/${cn}.crt" >/dev/null 2>&1 || error "${CADIR}/certs/${cn}.crt is not a valid CRT, you msust delete it !"
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# ask for CA passphrase
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ask_ca_password 0
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echo "Revoke certificate ${CADIR}/certs/${cn}.crt :"
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CA_PASSWORD="${CA_PASSWORD}" "$OPENSSL" ca \
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-config "${CONFFILE}" \
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-passin env:CA_PASSWORD \
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-revoke "${CADIR}/certs/${cn}.crt" \
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&& rm "${CADIR}/certs/${cn}.crt"
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CA_PASSWORD="${CA_PASSWORD}" "$OPENSSL" ca \
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-config "${CONFFILE}" \
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-passin env:CA_PASSWORD \
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-gencrl -out "${CADIR}/crl.pem"
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}
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list() {
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[ -f /etc/shellpki/ca/index.txt ] || exit 0
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list_valid=0
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list_revoked=1
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while getopts "avr" opt; do
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case "$opt" in
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a)
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list_valid=0
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list_revoked=0
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shift;;
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v)
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list_valid=0
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list_revoked=1
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shift;;
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r)
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list_valid=1
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list_revoked=0
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shift;;
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esac
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done
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[ "${list_valid}" -eq 0 ] && certs=$(grep "^V" "${CADIR}/index.txt")
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[ "${list_revoked}" -eq 0 ] && certs=$(grep "^R" "${CADIR}/index.txt")
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[ "${list_valid}" -eq 0 ] && [ "${list_revoked}" -eq 0 ] && certs=$(cat "${CADIR}/index.txt")
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echo "${certs}" | grep -Eo "CN\s*=[^,/]*" | cut -d'=' -f2 | xargs -n1
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}
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main() {
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[ "$(id -u)" -eq 0 ] || error "Please become root before running ${0} !"
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# main vars
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PREFIX="/etc/shellpki"
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PKIUSER="shellpki"
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CONFFILE="${PREFIX}/openssl.cnf"
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CADIR=$(grep -E "^dir" "${CONFFILE}" | cut -d'=' -f2|xargs -n1)
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OPENSSL=$(command -v openssl)
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TIMESTAMP=$(/bin/date +"%s")
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# directories for clients key, csr, crt
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KEYDIR="${PREFIX}/private"
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CSRDIR="${PREFIX}/requests"
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PEMDIR="${PREFIX}/pem"
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PKCS12DIR="${PREFIX}/pkcs12"
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OVPNDIR="${PREFIX}/openvpn"
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if ! getent passwd "${PKIUSER}" >/dev/null || ! getent group "${PKIUSER}" >/dev/null; then
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error "You must create ${PKIUSER} user and group !"
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fi
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[ -e "${CONFFILE}" ] || error "${CONFFILE} is missing"
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# create needed dir
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[ -d "${PREFIX}" ] || mkdir -p "${PREFIX}"
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[ -d "${KEYDIR}" ] || mkdir -m 0750 "${KEYDIR}"
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[ -d "${CSRDIR}" ] || mkdir -m 0755 "${CSRDIR}"
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[ -d "${PEMDIR}" ] || mkdir -m 0750 "${PEMDIR}"
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[ -d "${PKCS12DIR}" ] || mkdir -m 0750 "${PKCS12DIR}"
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[ -d "${OVPNDIR}" ] || mkdir -m 0750 "${OVPNDIR}"
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# fix right
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find "${PREFIX}" ! -path "${CADIR}" -exec chown "${PKIUSER}":"${PKIUSER}" {} \; -exec chmod u=rwX,g=rX,o= {} \;
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command=${1:-help}
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case "${command}" in
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init)
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shift
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init
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;;
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create)
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shift
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create "$@"
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;;
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revoke)
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shift
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revoke "$@"
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;;
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list)
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shift
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list "$@"
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;;
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*)
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usage >&2
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exit 1
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;;
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esac
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}
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main "$@"
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