mailcow/data/Dockerfiles/acme/acme.sh

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#!/bin/bash
set -o pipefail
exec 5>&1
# Do not attempt to write to slave
if [[ ! -z ${REDIS_SLAVEOF_IP} ]]; then
export REDIS_CMDLINE="redis-cli -h ${REDIS_SLAVEOF_IP} -p ${REDIS_SLAVEOF_PORT}"
else
export REDIS_CMDLINE="redis-cli -h redis -p 6379"
fi
source /srv/functions.sh
# Thanks to https://github.com/cvmiller -> https://github.com/cvmiller/expand6
source /srv/expand6.sh
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# Skipping IP check when we like to live dangerously
if [[ "${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
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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
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log_f "Waiting for Docker API..." no_nl
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until ping dockerapi -c1 > /dev/null; do
sleep 1
done
log_f "OK" no_date
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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
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[[ ! -f ${ACME_BASE}/dhparams.pem ]] && cp ${SSL_EXAMPLE}/dhparams.pem ${ACME_BASE}/dhparams.pem
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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
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chmod 600 ${ACME_BASE}/key.pem
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log_f "Waiting for database... " no_nl
while ! mysqladmin status --socket=/var/run/mysqld/mysqld.sock -u${DBUSER} -p${DBPASS} --silent; do
sleep 2
done
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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
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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
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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 "$0")
fi
while read domains; do
if [[ -z "${domains}" ]]; then
# ignore empty lines
continue
fi
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 ${VALIDATED_DOMAINS_ARR[@]:1} | xargs -n1 | sort -u | xargs))
# remove all domain names that are already inside the server certificate (SERVER_SAN_VALIDATED)
for domain in "${SERVER_SAN_VALIDATED[@]}"; do
for i in "${!VALIDATED_DOMAINS_SORTED[@]}"; do
if [[ ${VALIDATED_DOMAINS_SORTED[i]} = $domain ]]; then
unset 'VALIDATED_DOMAINS_SORTED[i]'
fi
done
done
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
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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."
${REDIS_CMDLINE} SET ACME_FAIL_TIME "$(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
mkdir -p ${ACME_BASE}/backups/${EXISTING_CERT}
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
rm -f "${ACME_BASE}/force_renew" 2> /dev/null
CERT_AMOUNT_CHANGED=${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..."
${REDIS_CMDLINE} SET ACME_FAIL_TIME "$(date +%s)"
sleep 30m
exec $(readlink -f "$0")
;;
esac
done