#!/bin/bash set -o pipefail exec 5>&1 source /srv/functions.sh # Thanks to https://github.com/cvmiller -> https://github.com/cvmiller/expand6 source /srv/expand6.sh # Skipping IP check when we like to live dangerously if [[ "${SKIP_IP_CHECK}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then SKIP_IP_CHECK=y fi # Skipping HTTP check when we like to live dangerously if [[ "${SKIP_HTTP_VERIFICATION}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then SKIP_HTTP_VERIFICATION=y fi # Request certificate for MAILCOW_HOSTNAME only if [[ "${ONLY_MAILCOW_HOSTNAME}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then ONLY_MAILCOW_HOSTNAME=y fi # Request individual certificate for every domain if [[ "${ENABLE_SSL_SNI}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then ENABLE_SSL_SNI=y fi if [[ "${SKIP_LETS_ENCRYPT}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then log_f "SKIP_LETS_ENCRYPT=y, skipping Let's Encrypt..." sleep 365d exec $(readlink -f "$0") fi log_f "Waiting for Docker API..." no_nl until ping dockerapi -c1 > /dev/null; do sleep 1 done log_f "OK" no_date ACME_BASE=/var/lib/acme SSL_EXAMPLE=/var/lib/ssl-example mkdir -p ${ACME_BASE}/acme # Migrate [[ -f ${ACME_BASE}/acme/private/privkey.pem ]] && mv ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/acme/key.pem [[ -f ${ACME_BASE}/acme/private/account.key ]] && mv ${ACME_BASE}/acme/private/account.key ${ACME_BASE}/acme/account.pem if [[ -f ${ACME_BASE}/acme/key.pem && -f ${ACME_BASE}/acme/cert.pem ]]; then if verify_hash_match ${ACME_BASE}/acme/cert.pem ${ACME_BASE}/acme/key.pem; then log_f "Migrating to SNI folder structure..." no_nl CERT_DOMAIN=($(openssl x509 -noout -text -in ${ACME_BASE}/acme/cert.pem | grep "Subject:" | sed -e 's/\(Subject:\)\|\(CN = \)\|\(CN=\)//g' | sed -e 's/^[[:space:]]*//')) CERT_DOMAINS=(${CERT_DOMAIN} $(openssl x509 -noout -text -in ${ACME_BASE}/acme/cert.pem | grep "DNS:" | sed -e 's/\(DNS:\)\|,//g' | sed "s/${CERT_DOMAIN}//" | sed -e 's/^[[:space:]]*//')) mkdir -p ${ACME_BASE}/${CERT_DOMAIN} mv ${ACME_BASE}/acme/cert.pem ${ACME_BASE}/${CERT_DOMAIN}/cert.pem # key is only copied, not moved, because it is used by all other requests too cp ${ACME_BASE}/acme/key.pem ${ACME_BASE}/${CERT_DOMAIN}/key.pem chmod 600 ${ACME_BASE}/${CERT_DOMAIN}/key.pem echo -n ${CERT_DOMAINS[*]} > ${ACME_BASE}/${CERT_DOMAIN}/domains mv ${ACME_BASE}/acme/acme.csr ${ACME_BASE}/${CERT_DOMAIN}/acme.csr log_f "OK" no_date fi fi [[ ! -f ${ACME_BASE}/dhparams.pem ]] && cp ${SSL_EXAMPLE}/dhparams.pem ${ACME_BASE}/dhparams.pem if [[ -f ${ACME_BASE}/cert.pem ]] && [[ -f ${ACME_BASE}/key.pem ]] && [[ $(stat -c%s ${ACME_BASE}/cert.pem) != 0 ]]; then ISSUER=$(openssl x509 -in ${ACME_BASE}/cert.pem -noout -issuer) if [[ ${ISSUER} != *"Let's Encrypt"* && ${ISSUER} != *"mailcow"* && ${ISSUER} != *"Fake LE Intermediate"* ]]; then log_f "Found certificate with issuer other than mailcow snake-oil CA and Let's Encrypt, skipping ACME client..." sleep 3650d exec $(readlink -f "$0") fi else if [[ -f ${ACME_BASE}/${MAILCOW_HOSTNAME}/cert.pem ]] && [[ -f ${ACME_BASE}/${MAILCOW_HOSTNAME}/key.pem ]] && verify_hash_match ${ACME_BASE}/${MAILCOW_HOSTNAME}/cert.pem ${ACME_BASE}/${MAILCOW_HOSTNAME}/key.pem; then log_f "Restoring previous acme certificate and restarting script..." cp ${ACME_BASE}/${MAILCOW_HOSTNAME}/cert.pem ${ACME_BASE}/cert.pem cp ${ACME_BASE}/${MAILCOW_HOSTNAME}/key.pem ${ACME_BASE}/key.pem # Restarting with env var set to trigger a restart, exec env TRIGGER_RESTART=1 $(readlink -f "$0") else log_f "Restoring mailcow snake-oil certificates and restarting script..." cp ${SSL_EXAMPLE}/cert.pem ${ACME_BASE}/cert.pem cp ${SSL_EXAMPLE}/key.pem ${ACME_BASE}/key.pem exec env TRIGGER_RESTART=1 $(readlink -f "$0") fi fi chmod 600 ${ACME_BASE}/key.pem log_f "Waiting for database... " no_nl while ! mysqladmin status --socket=/var/run/mysqld/mysqld.sock -u${DBUSER} -p${DBPASS} --silent; do sleep 2 done log_f "OK" no_date log_f "Waiting for Nginx... " no_nl until $(curl --output /dev/null --silent --head --fail http://nginx:8081); do sleep 2 done log_f "OK" no_date # Waiting for domain table log_f "Waiting for domain table... " no_nl while [[ -z ${DOMAIN_TABLE} ]]; do curl --silent http://nginx/ >/dev/null 2>&1 DOMAIN_TABLE=$(mysql --socket=/var/run/mysqld/mysqld.sock -u ${DBUSER} -p${DBPASS} ${DBNAME} -e "SHOW TABLES LIKE 'domain'" -Bs) [[ -z ${DOMAIN_TABLE} ]] && sleep 10 done log_f "OK" no_date log_f "Initializing, please wait... " while true; do # Re-using previous acme-mailcow account and domain keys if [[ ! -f ${ACME_BASE}/acme/key.pem ]]; then log_f "Generating missing domain private rsa key..." openssl genrsa 4096 > ${ACME_BASE}/acme/key.pem else log_f "Using existing domain rsa key ${ACME_BASE}/acme/key.pem" fi if [[ ! -f ${ACME_BASE}/acme/account.pem ]]; then log_f "Generating missing Lets Encrypt account key..." openssl genrsa 4096 > ${ACME_BASE}/acme/account.pem else log_f "Using existing Lets Encrypt account key ${ACME_BASE}/acme/account.pem" fi chmod 600 ${ACME_BASE}/acme/key.pem chmod 600 ${ACME_BASE}/acme/account.pem unset EXISTING_CERTS declare -a EXISTING_CERTS for cert_dir in ${ACME_BASE}/*/ ; do if [[ ! -f ${cert_dir}domains ]] || [[ ! -f ${cert_dir}cert.pem ]] || [[ ! -f ${cert_dir}key.pem ]]; then continue fi EXISTING_CERTS+=("$(basename ${cert_dir})") done # Cleaning up and init validation arrays unset SQL_DOMAIN_ARR unset VALIDATED_CONFIG_DOMAINS unset ADDITIONAL_VALIDATED_SAN unset ADDITIONAL_WC_ARR unset ADDITIONAL_SAN_ARR unset CERT_ERRORS unset CERT_CHANGED unset CERT_AMOUNT_CHANGED unset VALIDATED_CERTIFICATES CERT_ERRORS=0 CERT_CHANGED=0 CERT_AMOUNT_CHANGED=0 declare -a SQL_DOMAIN_ARR declare -a VALIDATED_CONFIG_DOMAINS declare -a ADDITIONAL_VALIDATED_SAN declare -a ADDITIONAL_WC_ARR declare -a ADDITIONAL_SAN_ARR declare -a VALIDATED_CERTIFICATES IFS=',' read -r -a TMP_ARR <<< "${ADDITIONAL_SAN}" for i in "${TMP_ARR[@]}" ; do if [[ "$i" =~ \.\*$ ]]; then ADDITIONAL_WC_ARR+=(${i::-2}) else ADDITIONAL_SAN_ARR+=($i) fi done ADDITIONAL_WC_ARR+=('autodiscover' 'autoconfig') # Start IP detection log_f "Detecting IP addresses... " no_nl IPV4=$(get_ipv4) IPV6=$(get_ipv6) log_f "OK" no_date # Hard-fail on CAA errors for MAILCOW_HOSTNAME MH_PARENT_DOMAIN=$(echo ${MAILCOW_HOSTNAME} | cut -d. -f2-) MH_CAAS=( $(dig CAA ${MH_PARENT_DOMAIN} +short | sed -n 's/\d issue "\(.*\)"/\1/p') ) if [[ ! -z ${MH_CAAS} ]]; then if [[ ${MH_CAAS[@]} =~ "letsencrypt.org" ]]; then log_f "Validated CAA for parent domain ${MH_PARENT_DOMAIN}" else log_f "Skipping ACME validation: Lets Encrypt disallowed for ${MAILCOW_HOSTNAME} by CAA record, retrying in 1h..." sleep 1h exec $(readlink -f "$0") fi fi ######################################### # IP and webroot challenge verification # SQL_DOMAINS=$(mysql --socket=/var/run/mysqld/mysqld.sock -u ${DBUSER} -p${DBPASS} ${DBNAME} -e "SELECT domain FROM domain WHERE backupmx=0" -Bs) if [[ ! $? -eq 0 ]]; then log_f "Failed to read SQL domains, retrying in 1 minute..." sleep 1m exec $(readlink -f "$0") fi while read domains; do SQL_DOMAIN_ARR+=("${domains}") done <<< "${SQL_DOMAINS}" if [[ ${ONLY_MAILCOW_HOSTNAME} != "y" ]]; then for SQL_DOMAIN in "${SQL_DOMAIN_ARR[@]}"; do unset VALIDATED_CONFIG_DOMAINS_SUBDOMAINS declare -a VALIDATED_CONFIG_DOMAINS_SUBDOMAINS for SUBDOMAIN in "${ADDITIONAL_WC_ARR[@]}"; do if [[ "${SUBDOMAIN}.${SQL_DOMAIN}" != "${MAILCOW_HOSTNAME}" ]]; then if check_domain "${SUBDOMAIN}.${SQL_DOMAIN}"; then VALIDATED_CONFIG_DOMAINS_SUBDOMAINS+=("${SUBDOMAIN}.${SQL_DOMAIN}") fi fi done VALIDATED_CONFIG_DOMAINS+=("${VALIDATED_CONFIG_DOMAINS_SUBDOMAINS[*]}") done fi if check_domain ${MAILCOW_HOSTNAME}; then VALIDATED_MAILCOW_HOSTNAME="${MAILCOW_HOSTNAME}" fi if [[ ${ONLY_MAILCOW_HOSTNAME} != "y" ]]; then for SAN in "${ADDITIONAL_SAN_ARR[@]}"; do # Skip on CAA errors for SAN SAN_PARENT_DOMAIN=$(echo ${SAN} | cut -d. -f2-) SAN_CAAS=( $(dig CAA ${SAN_PARENT_DOMAIN} +short | sed -n 's/\d issue "\(.*\)"/\1/p') ) if [[ ! -z ${SAN_CAAS} ]]; then if [[ ${SAN_CAAS[@]} =~ "letsencrypt.org" ]]; then log_f "Validated CAA for parent domain ${SAN_PARENT_DOMAIN} of ${SAN}" else log_f "Skipping ACME validation for ${SAN}: Lets Encrypt disallowed for ${SAN} by CAA record" continue fi fi if [[ ${SAN} == ${MAILCOW_HOSTNAME} ]]; then continue fi if check_domain ${SAN}; then ADDITIONAL_VALIDATED_SAN+=("${SAN}") fi done fi # Unique domains for server certificate if [[ ${ENABLE_SSL_SNI} == "y" ]]; then # create certificate for server name and fqdn SANs only SERVER_SAN_VALIDATED=(${VALIDATED_MAILCOW_HOSTNAME} $(echo ${ADDITIONAL_VALIDATED_SAN[*]} | xargs -n1 | sort -u | xargs)) else # create certificate for all domains, including all subdomains from other domains [*] SERVER_SAN_VALIDATED=(${VALIDATED_MAILCOW_HOSTNAME} $(echo ${VALIDATED_CONFIG_DOMAINS[*]} ${ADDITIONAL_VALIDATED_SAN[*]} | xargs -n1 | sort -u | xargs)) fi if [[ ! -z ${SERVER_SAN_VALIDATED[*]} ]]; then CERT_NAME=${SERVER_SAN_VALIDATED[0]} VALIDATED_CERTIFICATES+=("${CERT_NAME}") # obtain server certificate if required DOMAINS=${SERVER_SAN_VALIDATED[@]} /srv/obtain-certificate.sh rsa RETURN="$?" if [[ "$RETURN" == "0" ]]; then # 0 = cert created successfully CERT_AMOUNT_CHANGED=1 CERT_CHANGED=1 elif [[ "$RETURN" == "1" ]]; then # 1 = cert renewed successfully CERT_CHANGED=1 elif [[ "$RETURN" == "2" ]]; then # 2 = cert not due for renewal : else CERT_ERRORS=1 fi # copy hostname certificate to default/server certificate cp ${ACME_BASE}/${CERT_NAME}/cert.pem ${ACME_BASE}/cert.pem cp ${ACME_BASE}/${CERT_NAME}/key.pem ${ACME_BASE}/key.pem fi # individual certificates for SNI [@] if [[ ${ENABLE_SSL_SNI} == "y" ]]; then for VALIDATED_DOMAINS in "${VALIDATED_CONFIG_DOMAINS[@]}"; do VALIDATED_DOMAINS_ARR=(${VALIDATED_DOMAINS}) unset VALIDATED_DOMAINS_SORTED declare -a VALIDATED_DOMAINS_SORTED VALIDATED_DOMAINS_SORTED=(${VALIDATED_DOMAINS_ARR[0]} $(echo ${VALIDATED_DOMAINS_ARR[@]:1} | xargs -n1 | sort -u | xargs)) if [[ ! -z ${VALIDATED_DOMAINS_SORTED[*]} ]]; then CERT_NAME=${VALIDATED_DOMAINS_SORTED[0]} VALIDATED_CERTIFICATES+=("${CERT_NAME}") # obtain certificate if required DOMAINS=${VALIDATED_DOMAINS_SORTED[@]} /srv/obtain-certificate.sh rsa RETURN="$?" if [[ "$RETURN" == "0" ]]; then # 0 = cert created successfully CERT_AMOUNT_CHANGED=1 CERT_CHANGED=1 elif [[ "$RETURN" == "1" ]]; then # 1 = cert renewed successfully CERT_CHANGED=1 elif [[ "$RETURN" == "2" ]]; then # 2 = cert not due for renewal : else CERT_ERRORS=1 fi fi done fi if [[ -z ${VALIDATED_CERTIFICATES[*]} ]]; then log_f "Cannot validate any hostnames, skipping Let's Encrypt for 1 hour." log_f "Use SKIP_LETS_ENCRYPT=y in mailcow.conf to skip it permanently." redis-cli -h redis SET ACME_FAIL_TIME "$(date +%s)" sleep 1h exec $(readlink -f "$0") fi # find orphaned certificates if no errors occurred if [[ "${CERT_ERRORS}" == "0" ]]; then for EXISTING_CERT in "${EXISTING_CERTS[@]}"; do if [[ ! "`printf '_%s_\n' "${VALIDATED_CERTIFICATES[@]}"`" == *"_${EXISTING_CERT}_"* ]]; then DATE=$(date +%Y-%m-%d_%H_%M_%S) log_f "Found orphaned certificate: ${EXISTING_CERT} - archiving it at ${ACME_BASE}/backups/${EXISTING_CERT}/" BACKUP_DIR=${ACME_BASE}/backups/${EXISTING_CERT}/${DATE} # archive rsa cert and any other files mv ${ACME_BASE}/${EXISTING_CERT} ${BACKUP_DIR} CERT_CHANGED=1 CERT_AMOUNT_CHANGED=1 fi done fi # reload on new or changed certificates if [[ "${CERT_CHANGED}" == "1" ]]; then CERT_AMOUNT_CHANGED=${CERT_AMOUNT_CHANGED} /srv/reload-configurations.sh fi case "$CERT_ERRORS" in 0) # all successful if [[ "${CERT_CHANGED}" == "1" ]]; then if [[ "${CERT_AMOUNT_CHANGED}" == "1" ]]; then log_f "Certificates successfully requested and renewed where required, sleeping one day" else log_f "Certificates were successfully renewed where required, sleeping for another day." fi else log_f "Certificates were successfully validated, no changes or renewals required, sleeping for another day." fi sleep 1d ;; *) # non-zero log_f "Some errors occurred, retrying in 30 minutes..." redis-cli -h redis SET ACME_FAIL_TIME "$(date +%s)" sleep 30m exec $(readlink -f "$0") ;; esac done