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mailcow/data/Dockerfiles/acme/docker-entrypoint.sh

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#!/bin/bash
set -o pipefail
exec 5>&1
log_f() {
if [[ ${2} == "no_nl" ]]; then
echo -n "$(date) - ${1}"
elif [[ ${2} == "no_date" ]]; then
echo "${1}"
elif [[ ${2} != "redis_only" ]]; then
echo "$(date) - ${1}"
fi
redis-cli -h redis LPUSH ACME_LOG "{\"time\":\"$(date +%s)\",\"message\":\"$(printf '%s' "${1}" | \
tr '%&;$"_[]{}-\r\n' ' ')\"}" > /dev/null
redis-cli -h redis LTRIM ACME_LOG 0 ${LOG_LINES} > /dev/null
}
if [[ "${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 "Found Docker API" no_date
ACME_BASE=/var/lib/acme
SSL_EXAMPLE=/var/lib/ssl-example
mkdir -p ${ACME_BASE}/acme/private
restart_containers(){
for container in $*; do
log_f "Restarting ${container}..." no_nl
C_REST_OUT=$(curl -X POST http://dockerapi:8080/containers/${container}/restart | jq -r '.msg')
log_f "${C_REST_OUT}" no_date
done
}
array_diff() {
# https://stackoverflow.com/questions/2312762, Alex Offshore
eval local ARR1=\(\"\${$2[@]}\"\)
eval local ARR2=\(\"\${$3[@]}\"\)
local IFS=$'\n'
mapfile -t $1 < <(comm -23 <(echo "${ARR1[*]}" | sort) <(echo "${ARR2[*]}" | sort))
}
verify_hash_match(){
CERT_HASH=$(openssl x509 -noout -modulus -in "${1}" | openssl md5)
KEY_HASH=$(openssl rsa -noout -modulus -in "${2}" | openssl md5)
if [[ ${CERT_HASH} != ${KEY_HASH} ]]; then
log_f "Certificate and key hashes do not match!"
return 1
else
log_f "Verified hashes."
return 0
fi
}
get_ipv4(){
local IPV4=
local IPV4_SRCS=
local TRY=
IPV4_SRCS[0]="api.ipify.org"
IPV4_SRCS[1]="ifconfig.co"-
IPV4_SRCS[2]="icanhazip.com"
IPV4_SRCS[3]="v4.ident.me"
IPV4_SRCS[4]="ipecho.net/plain"
IPV4_SRCS[5]="mailcow.email/ip.php"
until [[ ! -z ${IPV4} ]] || [[ ${TRY} -ge 100 ]]; do
IPV4=$(curl --connect-timeout 3 -m 10 -L4s ${IPV4_SRCS[$RANDOM % ${#IPV4_SRCS[@]} ]} | grep -E "^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$")
[[ ! -z ${TRY} ]] && sleep 1
TRY=$((TRY+1))
done
echo ${IPV4}
}
[[ ! -f ${ACME_BASE}/dhparams.pem ]] && cp ${SSL_EXAMPLE}/dhparams.pem ${ACME_BASE}/dhparams.pem
if [[ -f ${ACME_BASE}/cert.pem ]] && [[ -f ${ACME_BASE}/key.pem ]]; then
ISSUER=$(openssl x509 -in ${ACME_BASE}/cert.pem -noout -issuer)
if [[ ${ISSUER} != *"Let's Encrypt"* && ${ISSUER} != *"mailcow"* ]]; 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 "$0")
else
declare -a SAN_ARRAY_NOW
SAN_NAMES=$(openssl x509 -noout -text -in ${ACME_BASE}/cert.pem | awk '/X509v3 Subject Alternative Name/ {getline;gsub(/ /, "", $0); print}' | tr -d "DNS:")
if [[ ! -z ${SAN_NAMES} ]]; then
IFS=',' read -a SAN_ARRAY_NOW <<< ${SAN_NAMES}
log_f "Found Let's Encrypt or mailcow snake-oil CA issued certificate with SANs: ${SAN_ARRAY_NOW[*]}"
fi
fi
else
if [[ -f ${ACME_BASE}/acme/fullchain.pem ]] && [[ -f ${ACME_BASE}/acme/private/privkey.pem ]]; then
if verify_hash_match ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/acme/private/privkey.pem; then
log_f "Restoring previous acme certificate and restarting script..."
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
# Restarting with env var set to trigger a restart,
exec env TRIGGER_RESTART=1 $(readlink -f "$0")
fi
ISSUER="mailcow"
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 "$0")
fi
fi
while ! mysqladmin ping --host mysql -u${DBUSER} -p${DBPASS} --silent; do
echo "Waiting for database to come up..."
sleep 2
done
while true; do
if [[ "${SKIP_IP_CHECK}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
SKIP_IP_CHECK=y
fi
unset SQL_DOMAIN_ARR
unset VALIDATED_CONFIG_DOMAINS
unset ADDITIONAL_VALIDATED_SAN
declare -a SQL_DOMAIN_ARR
declare -a VALIDATED_CONFIG_DOMAINS
declare -a ADDITIONAL_VALIDATED_SAN
IFS=',' read -r -a ADDITIONAL_SAN_ARR <<< "${ADDITIONAL_SAN}"
IPV4=$(get_ipv4)
# Container ids may have changed
CONTAINERS_RESTART=($(curl --silent http://dockerapi:8080/containers/json | jq -r '.[] | {name: .Config.Labels["com.docker.compose.service"], id: .Id}' | jq -rc 'select( .name | tostring | contains("nginx-mailcow") or contains("postfix-mailcow") or contains("dovecot-mailcow")) | .id' | tr "\n" " "))
log_f "Waiting for domain table... " no_nl
while [[ -z ${DOMAIN_TABLE} ]]; do
curl --silent http://nginx/ >/dev/null 2>&1
DOMAIN_TABLE=$(mysql -h mysql-mailcow -u ${DBUSER} -p${DBPASS} ${DBNAME} -e "SHOW TABLES LIKE 'domain'" -Bs)
[[ -z ${DOMAIN_TABLE} ]] && sleep 10
done
log_f "Found domain tables." no_date
while read domains; do
SQL_DOMAIN_ARR+=("${domains}")
done < <(mysql -h mysql-mailcow -u ${DBUSER} -p${DBPASS} ${DBNAME} -e "SELECT domain FROM domain WHERE backupmx=0 UNION SELECT alias_domain FROM alias_domain" -Bs)
for SQL_DOMAIN in "${SQL_DOMAIN_ARR[@]}"; do
A_CONFIG=$(dig A autoconfig.${SQL_DOMAIN} +short | tail -n 1)
if [[ ! -z ${A_CONFIG} ]]; then
log_f "Found A record for autoconfig.${SQL_DOMAIN}: ${A_CONFIG}"
if [[ ${IPV4:-ERR} == ${A_CONFIG} ]] || [[ ${SKIP_IP_CHECK} == "y" ]]; then
log_f "Confirmed A record autoconfig.${SQL_DOMAIN}"
VALIDATED_CONFIG_DOMAINS+=("autoconfig.${SQL_DOMAIN}")
else
log_f "Cannot match your IP ${IPV4} against hostname autoconfig.${SQL_DOMAIN} (${A_CONFIG})"
fi
else
log_f "No A record for autoconfig.${SQL_DOMAIN} found"
fi
A_DISCOVER=$(dig A autodiscover.${SQL_DOMAIN} +short | tail -n 1)
if [[ ! -z ${A_DISCOVER} ]]; then
log_f "Found A record for autodiscover.${SQL_DOMAIN}: ${A_DISCOVER}"
if [[ ${IPV4:-ERR} == ${A_DISCOVER} ]] || [[ ${SKIP_IP_CHECK} == "y" ]]; then
log_f "Confirmed A record autodiscover.${SQL_DOMAIN}"
VALIDATED_CONFIG_DOMAINS+=("autodiscover.${SQL_DOMAIN}")
else
log_f "Cannot match your IP ${IPV4} against hostname autodiscover.${SQL_DOMAIN} (${A_DISCOVER})"
fi
else
log_f "No A record for autodiscover.${SQL_DOMAIN} found"
fi
done
A_MAILCOW_HOSTNAME=$(dig A ${MAILCOW_HOSTNAME} +short | tail -n 1)
if [[ ! -z ${A_MAILCOW_HOSTNAME} ]]; then
log_f "Found A record for ${MAILCOW_HOSTNAME}: ${A_MAILCOW_HOSTNAME}"
if [[ ${IPV4:-ERR} == ${A_MAILCOW_HOSTNAME} ]] || [[ ${SKIP_IP_CHECK} == "y" ]]; then
log_f "Confirmed A record ${MAILCOW_HOSTNAME}"
VALIDATED_MAILCOW_HOSTNAME=${MAILCOW_HOSTNAME}
else
log_f "Cannot match your IP ${IPV4} against hostname ${MAILCOW_HOSTNAME} (${A_MAILCOW_HOSTNAME}) "
fi
else
log_f "No A record for ${MAILCOW_HOSTNAME} found"
fi
for SAN in "${ADDITIONAL_SAN_ARR[@]}"; do
if [[ ${SAN} == ${MAILCOW_HOSTNAME} ]]; then
continue
fi
A_SAN=$(dig A ${SAN} +short | tail -n 1)
if [[ ! -z ${A_SAN} ]]; then
log_f "Found A record for ${SAN}: ${A_SAN}"
if [[ ${IPV4:-ERR} == ${A_SAN} ]] || [[ ${SKIP_IP_CHECK} == "y" ]]; then
log_f "Confirmed A record ${SAN}"
ADDITIONAL_VALIDATED_SAN+=("${SAN}")
else
log_f "Cannot match your IP against hostname ${SAN}"
fi
else
log_f "No A record for ${SAN} found"
fi
done
# Unique elements
ALL_VALIDATED=(${VALIDATED_MAILCOW_HOSTNAME} $(echo ${VALIDATED_CONFIG_DOMAINS[*]} ${ADDITIONAL_VALIDATED_SAN[*]} | xargs -n1 | sort -u | xargs))
if [[ -z ${ALL_VALIDATED[*]} ]]; then
log_f "Cannot validate hostnames, skipping Let's Encrypt for 1 hour."
log_f "Use SKIP_LETS_ENCRYPT=y in mailcow.conf to skip it permanently."
sleep 1h
exec $(readlink -f "$0")
fi
array_diff ORPHANED_SAN SAN_ARRAY_NOW ALL_VALIDATED
if [[ ! -z ${ORPHANED_SAN[*]} ]] && [[ ${ISSUER} != *"mailcow"* ]]; then
DATE=$(date +%Y-%m-%d_%H_%M_%S)
log_f "Found orphaned SAN ${ORPHANED_SAN[*]} in certificate, moving old files to ${ACME_BASE}/acme/private/${DATE}.bak/, keeping key file..."
mkdir -p ${ACME_BASE}/acme/private/${DATE}.bak/
[[ -f ${ACME_BASE}/acme/private/account.key ]] && mv ${ACME_BASE}/acme/private/account.key ${ACME_BASE}/acme/private/${DATE}.bak/
[[ -f ${ACME_BASE}/acme/fullchain.pem ]] && mv ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/acme/private/${DATE}.bak/
[[ -f ${ACME_BASE}/acme/cert.pem ]] && mv ${ACME_BASE}/acme/cert.pem ${ACME_BASE}/acme/private/${DATE}.bak/
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/acme/private/${DATE}.bak/ # Keep key for TLSA 3 1 1 records
fi
ACME_RESPONSE=$(acme-client \
-v -e -b -N -n \
-a 'https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf' \
-f ${ACME_BASE}/acme/private/account.key \
-k ${ACME_BASE}/acme/private/privkey.pem \
-c ${ACME_BASE}/acme \
${ALL_VALIDATED[*]} 2>&1 | tee /dev/fd/5)
case "$?" in
0) # new certs
log_f "${ACME_RESPONSE}" redis_only
# cp the new certificates and keys
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
# restart docker containers
if ! verify_hash_match ${ACME_BASE}/cert.pem ${ACME_BASE}/key.pem; then
log_f "Certificate was successfully requested, but key and certificate have non-matching hashes, restoring mailcow snake-oil and restarting containers..."
cp ${SSL_EXAMPLE}/cert.pem ${ACME_BASE}/cert.pem
cp ${SSL_EXAMPLE}/key.pem ${ACME_BASE}/key.pem
fi
restart_containers ${CONTAINERS_RESTART[*]}
;;
1) # failure
log_f "${ACME_RESPONSE}" redis_only
if [[ $ACME_RESPONSE =~ "No registration exists" ]]; then
log_f "Registration keys are invalid, deleting old keys and restarting..."
rm ${ACME_BASE}/acme/private/account.key
exec $(readlink -f "$0")
fi
if [[ -f ${ACME_BASE}/acme/private/${DATE}.bak/fullchain.pem ]] && [[ -f ${ACME_BASE}/acme/private/${DATE}.bak/privkey.pem ]]; then
log_f "Error requesting certificate, restoring previous certificate from backup and restarting containers...."
cp ${ACME_BASE}/acme/private/${DATE}.bak/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/${DATE}.bak/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
elif [[ -f ${ACME_BASE}/acme/fullchain.pem ]] && [[ -f ${ACME_BASE}/acme/private/privkey.pem ]]; then
log_f "Error requesting certificate, restoring from previous acme request and restarting containers..."
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
if ! verify_hash_match ${ACME_BASE}/cert.pem ${ACME_BASE}/key.pem; then
log_f "Error verifying certificates, restoring mailcow snake-oil and restarting containers..."
cp ${SSL_EXAMPLE}/cert.pem ${ACME_BASE}/cert.pem
cp ${SSL_EXAMPLE}/key.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
[[ ${TRIGGER_RESTART} == 1 ]] && restart_containers ${CONTAINERS_RESTART[*]}
log_f "Retrying in 30 minutes..."
sleep 30m
exec $(readlink -f "$0")
;;
2) # no change
log_f "${ACME_RESPONSE}" redis_only
if ! diff ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem; then
log_f "Certificate was not changed, but active certificate does not match the verified certificate, fixing and restarting containers..."
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
if ! verify_hash_match ${ACME_BASE}/cert.pem ${ACME_BASE}/key.pem; then
log_f "Certificate was not changed, but hashes do not match, restoring from previous acme request and restarting containers..."
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
log_f "Certificate was not changed"
[[ ${TRIGGER_RESTART} == 1 ]] && restart_containers ${CONTAINERS_RESTART[*]}
;;
*) # unspecified
log_f "${ACME_RESPONSE}" redis_only
if [[ -f ${ACME_BASE}/acme/private/${DATE}.bak/fullchain.pem ]] && [[ -f ${ACME_BASE}/acme/private/${DATE}.bak/privkey.pem ]]; then
log_f "Error requesting certificate, restoring previous certificate from backup and restarting containers...."
cp ${ACME_BASE}/acme/private/${DATE}.bak/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/${DATE}.bak/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
elif [[ -f ${ACME_BASE}/acme/fullchain.pem ]] && [[ -f ${ACME_BASE}/acme/private/privkey.pem ]]; then
log_f "Error requesting certificate, restoring from previous acme request and restarting containers..."
cp ${ACME_BASE}/acme/fullchain.pem ${ACME_BASE}/cert.pem
cp ${ACME_BASE}/acme/private/privkey.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
if ! verify_hash_match ${ACME_BASE}/cert.pem ${ACME_BASE}/key.pem; then
log_f "Error verifying certificates, restoring mailcow snake-oil..."
cp ${SSL_EXAMPLE}/cert.pem ${ACME_BASE}/cert.pem
cp ${SSL_EXAMPLE}/key.pem ${ACME_BASE}/key.pem
TRIGGER_RESTART=1
fi
[[ ${TRIGGER_RESTART} == 1 ]] && restart_containers ${CONTAINERS_RESTART[*]}
log_f "Retrying in 30 minutes..."
sleep 30m
exec $(readlink -f "$0")
;;
esac
log_f "ACME certificate validation done. Sleeping for another day."
sleep 1d
done
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