243 lines
7.5 KiB
Bash
Executable File
243 lines
7.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# evoacme is a shell script to manage Let's Encrypt certificate with
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# certbot tool but with a dedicated user (no-root) and from a csr
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#
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# Author: Victor Laborie <vlaborie@evolix.fr>
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# Licence: AGPLv3
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#
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set -e
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usage() {
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echo "Usage: $0 [ --cron ] NAME"
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echo ""
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echo "NAME must be correspond to :"
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echo "- a CSR in ${CSR_DIR}/NAME.csr"
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echo "- a KEY in ${SSL_KEY_DIR}/NAME.key"
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echo ""
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}
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debug() {
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[ "$CRON" = "NO" ] && echo "$1"
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}
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error() {
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echo "error: $1" >&2
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[ "$1" = "invalid argument(s)" ] && usage
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exit 1
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}
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change_cert_path_for_apache() {
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vhost=$1
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vhost_full_path="/etc/apache2/ssl/${vhost}.conf"
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cert_path=$2
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debug "Apache detected... first configuration in ${vhost_full_path}"
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[ -f "${vhost_full_path}" ] && sed -i "s~^SSLCertificateFile.*$~SSLCertificateFile ${cert_path}~" "${vhost_full_path}"
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${APACHE2CTL_BIN} -t
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}
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change_cert_path_for_nginx() {
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vhost=$1
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vhost_full_path="/etc/nginx/ssl/${vhost}.conf"
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cert_path=$2
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debug "Nginx detected... first configuration in ${vhost_full_path}"
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[ -f "${vhost_full_path}" ] && sed -i "s~^ssl_certificate[^_].*$~ssl_certificate ${cert_path};~" "${vhost_full_path}"
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${NGINX_BIN} -t
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}
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x509_verify() {
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file=$1
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${OPENSSL_BIN} x509 -noout -modulus -in "${file}" >/dev/null
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}
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x509_enddate() {
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file=$1
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${OPENSSL_BIN} x509 -noout -enddate -in "${file}"
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}
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main() {
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[ -f /etc/default/evoacme ] && . /etc/default/evoacme
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[ -z "${SSL_KEY_DIR}" ] && SSL_KEY_DIR=/etc/ssl/private
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[ -z "${ACME_DIR}" ] && ACME_DIR=/var/lib/letsencrypt
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[ -z "${CSR_DIR}" ] && CSR_DIR=/etc/ssl/requests
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[ -z "${CRT_DIR}" ] && CRT_DIR=/etc/letsencrypt
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[ -z "${LOG_DIR}" ] && LOG_DIR=/var/log/evoacme
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[ -z "${SSL_MINDAY}" ] && SSL_MINDAY=30
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[ -z "${SELF_SIGNED_DIR}" ] && SELF_SIGNED_DIR=/etc/ssl/self-signed
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[ -z "${DH_DIR}" ] && DH_DIR=etc/ssl/dhparam
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[ "$1" = "-h" ] || [ "$1" = "--help" ] && usage && exit 0
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# check arguments
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[ "$#" -ge 3 ] || [ "$#" -le 0 ] && error "invalid argument(s)"
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[ "$#" -eq 2 ] && [ "$1" != "--cron" ] && error "invalid argument(s)"
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[ "$#" -eq 1 ] && VHOST=$(basename "$1" .conf) && CRON=NO
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[ "$#" -eq 2 ] && VHOST=$(basename "$2" .conf) && CRON=YES
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# check for important programs
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OPENSSL_BIN=$(command -v openssl)
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if [ "$?" -eq 0 ]; then
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error "openssl command not installed"
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fi
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CERTBOT_BIN=$(command -v certbot)
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if [ "$?" -eq 0 ]; then
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error "certbot command not installed"
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fi
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APACHE2CTL_BIN=$(command -v apache2ctl)
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NGINX_BIN=$(command -v nginx)
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# double check for directories
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[ ! -d "${ACME_DIR}" ] && error "${ACME_DIR} is not a directory"
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[ ! -d "${CSR_DIR}" ] && error "${CSR_DIR} is not a directory"
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[ ! -d "${LOG_DIR} "] && error "${LOG_DIR} is not a directory"
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#### CSR VALIDATION
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# verify .csr file
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CSR_FILE="${CSR_DIR}/${VHOST}.csr"
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debug "Using CSR file: ${CSR_FILE}"
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[ ! -f "${CSR_FILE}" ] && error "${CSR_FILE} absent"
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[ ! -r "${CSR_FILE}" ] && error "${CSR_FILE} is not readable"
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x509_verify "${CSR_FILE}" || error "${CSR_FILE} is invalid"
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# Hook for evoadmin-web in cluster mode : check master status
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evoadmin_state_file="/home/${VHOST}/state"
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if [ -f "${evoadmin_state_file}" ]; then
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grep -q "STATE=master" "${evoadmin_state_file}"
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if [ "$?" != 0 ]; then
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debug "We are not the master of this evoadmin cluster. Quit!"
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exit 0
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fi
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fi
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#### INIT OR RENEW?
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LIVE_DIR="${CRT_DIR}/${VHOST}/live"
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LIVE_CERT="${LIVE_DIR}/cert.crt"
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LIVE_FULLCHAIN="${LIVE_DIR}/fullchain.pem"
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LIVE_CHAIN="${LIVE_DIR}/chain.pem"
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# If live symlink already exists, it's not our first time...
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if [ -h "${LIVE_DIR}" ]; then
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# we have a live symlink
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# let's see if there is a cert to renew
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x509_verify "${LIVE_CERT}" || error "${LIVE_CERT} is invalid"
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# Verify if our certificate will expire
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crt_end_date=$(x509_enddate "${LIVE_CERT}" | cut -d= -f2)
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date_renew=$(date -ud "${crt_end_date} - ${SSL_MINDAY} days" +"%s")
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date_today=$(date +'%s')
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if [ "${date_today}" -lt "${date_renew}" ]; then
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debug "Cert ${LIVE_CERT} expires at ${crt_end_date} => more than ${SSL_MINDAY} days: kthxbye."
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exit 0
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fi
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else
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# We don't have a live symlink yet
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# Let's start from scratch and configure our web server(s)
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if [ -n "${APACHE2CTL_BIN}" ]; then
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change_cert_path_for_apache "${VHOST}" "${LIVE_FULLCHAIN}"
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fi
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if [ -n "${NGINX_BIN}" ]; then
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change_cert_path_for_nginx "${VHOST}" "${LIVE_FULLCHAIN}"
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fi
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fi
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#### CERTIFICATE CREATION WITH CERTBOT
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ITERATION=$(date "+%Y%m%d")
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[ -z "${ITERATION}" ] && error "invalid iteration (${ITERATION})"
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NEW_DIR="${CRT_DIR}/${VHOST}/${ITERATION}"
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[ -d "${NEW_DIR}" ] && error "${NEW_DIR} directory already exists, remove it manually."
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mkdir -pm 755 "${NEW_DIR}"
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chown -R acme: "${NEW_DIR}"
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debug "New cert will be created in ${NEW_DIR}"
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NEW_CERT="${NEW_DIR}/cert.crt"
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NEW_FULLCHAIN="${NEW_DIR}/fullchain.pem"
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NEW_CHAIN="${NEW_DIR}/chain.pem"
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CERTBOT_MODE=""
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[ "$TEST" = "YES" ] && CERTBOT_MODE="${CERTBOT_MODE} --test-cert"
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[ "$CRON" = "YES" ] && CERTBOT_MODE="${CERTBOT_MODE} --quiet"
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[ "$DRY_RUN" = "YES" ] && CERTBOT_MODE="${CERTBOT_MODE} --dry-run"
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CERTBOT_REGISTRATION="--agree-tos"
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if [ -n "${SSL_EMAIL}" ]; then
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debug "Registering at certbot with ${SSL_EMAIL} as email"
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CERTBOT_REGISTRATION="${CERTBOT_REGISTRATION} -m ${SSL_EMAIL}"
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else
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debug "Registering at certbot without email"
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CERTBOT_REGISTRATION="${CERTBOT_REGISTRATION} --register-unsafely-without-email"
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fi
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# create a certificate with certbot
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sudo -u acme ${CERTBOT_BIN} \
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certonly \
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${CERTBOT_MODE} \
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${CERTBOT_REGISTRATION} \
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--non-interactive \
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--webroot \
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--csr "${CSR_FILE}" \
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--webroot-path "${ACME_DIR}" \
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--cert-path "${NEW_CERT}" \
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--fullchain-path "${NEW_FULLCHAIN}" \
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--chain-path "${NEW_CHAIN}" \
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--logs-dir "$LOG_DIR" \
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2>&1 \
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| grep -v "certbot.crypto_util"
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# verify if all is right
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x509_verify "${NEW_CERT}" || error "${NEW_CERT} is invalid"
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x509_verify "${NEW_FULLCHAIN}" || error "${NEW_FULLCHAIN} is invalid"
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x509_verify "${NEW_CHAIN}" || error "${NEW_CHAIN} is invalid"
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#### CERTIFICATE ACTIVATION
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# link dance
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if [ -h "${LIVE_DIR}" ]; then
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rm "${LIVE_DIR}"
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debug "Remove ${LIVE_DIR} link"
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fi
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ln -s "${NEW_DIR}" "${LIVE_DIR}"
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debug "Link ${NEW_DIR} to ${LIVE_DIR}"
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# verify final path
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x509_verify "${LIVE_CERT}" || error "${LIVE_CERT} is invalid"
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# disable error catching
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# below this point anything can break
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set +e
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# reload apache if present
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if [ -n "$(pidof apache2)" ]; then
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${APACHE2CTL_BIN} -t 2>/dev/null
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if [ "$?" -eq 0 ]; then
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debug "Apache detected... reloading"
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service apache2 reload
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else
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error "Apache config is broken, you must fix it !"
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fi
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fi
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# reload nginx if present
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if [ -n "$(pidof nginx)" ]; then
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${NGINX_BIN} -t 2>/dev/null
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if [ "$?" -eq 0 ]; then
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debug "Nginx detected... reloading"
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service nginx reload
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else
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error "Nginx config is broken, you must fix it !"
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fi
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fi
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}
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main "$@"
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