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#!/bin/bash
ACME_BASE = /var/lib/acme
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SSL_EXAMPLE = /var/lib/ssl-example
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mkdir -p ${ ACME_BASE } /acme/private
restart_containers( ) {
for container in $* ; do
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echo " Restarting ${ container } ... "
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curl -X POST \
--unix-socket /var/run/docker.sock \
" http/containers/ ${ container } /restart "
done
}
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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
echo "Certificate and key hashes do not match!"
return 1
else
echo "Verified hashes."
return 0
fi
}
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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 }
}
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[ [ ! -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
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ISSUER = $( openssl x509 -in ${ ACME_BASE } /cert.pem -noout -issuer)
if [ [ ${ ISSUER } != *"Let's Encrypt" * && ${ ISSUER } != *"mailcow" * ] ] ; then
echo "Found certificate with issuer other than mailcow snake-oil CA and Let's Encrypt, skipping ACME client..."
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exit 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 }
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echo " Found Let's Encrypt or mailcow snake-oil CA issued certificate with SANs: ${ SAN_ARRAY_NOW [*] } "
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fi
fi
else
if [ [ -f ${ ACME_BASE } /acme/fullchain.pem ] ] && [ [ -f ${ ACME_BASE } /acme/private/privkey.pem ] ] ; then
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if verify_hash_match ${ ACME_BASE } /acme/fullchain.pem ${ ACME_BASE } /acme/private/privkey.pem; then
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echo "Restoring previous acme certificate and restarting script..."
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cp ${ ACME_BASE } /acme/fullchain.pem ${ ACME_BASE } /cert.pem
cp ${ ACME_BASE } /acme/private/privkey.pem ${ ACME_BASE } /key.pem
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exec env TRIGGER_RESTART = 1 $( readlink -f " $0 " )
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fi
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ISSUER = "mailcow"
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else
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echo "Restoring mailcow snake-oil certificates and restarting script..."
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cp ${ SSL_EXAMPLE } /cert.pem ${ ACME_BASE } /cert.pem
cp ${ SSL_EXAMPLE } /key.pem ${ ACME_BASE } /key.pem
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exec env TRIGGER_RESTART = 1 $( readlink -f " $0 " )
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fi
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fi
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while true; do
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if [ [ " ${ SKIP_LETS_ENCRYPT } " = ~ ^( [ yY] [ eE] [ sS] | [ yY] ) +$ ] ] ; then
echo "SKIP_LETS_ENCRYPT=y, skipping Let's Encrypt..."
exit 0
fi
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if [ [ " ${ SKIP_IP_CHECK } " = ~ ^( [ yY] [ eE] [ sS] | [ yY] ) +$ ] ] ; then
SKIP_IP_CHECK = y
fi
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unset SQL_DOMAIN_ARR
unset VALIDATED_CONFIG_DOMAINS
unset ADDITIONAL_VALIDATED_SAN
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declare -a SQL_DOMAIN_ARR
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declare -a VALIDATED_CONFIG_DOMAINS
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declare -a ADDITIONAL_VALIDATED_SAN
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IFS = ',' read -r -a ADDITIONAL_SAN_ARR <<< " ${ ADDITIONAL_SAN } "
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IPV4 = $( get_ipv4)
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# Container ids may have changed
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CONTAINERS_RESTART = ( $( curl --silent --unix-socket /var/run/docker.sock http/containers/json | jq -rc 'map(select(.Names[] | contains ("nginx-mailcow") or contains ("postfix-mailcow") or contains ("dovecot-mailcow"))) | .[] .Id' | tr "\n" " " ) )
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while read domain; do
SQL_DOMAIN_ARR += ( " ${ domain } " )
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done < <( mysql -h mysql-mailcow -u ${ DBUSER } -p${ DBPASS } ${ DBNAME } -e "SELECT domain FROM domain WHERE backupmx=0" -Bs)
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while read alias_domain; do
SQL_DOMAIN_ARR += ( " ${ alias_domain } " )
done < <( mysql -h mysql-mailcow -u ${ DBUSER } -p${ DBPASS } ${ DBNAME } -e "SELECT alias_domain FROM alias_domain" -Bs)
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for SQL_DOMAIN in " ${ SQL_DOMAIN_ARR [@] } " ; do
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A_CONFIG = $( dig A autoconfig.${ SQL_DOMAIN } +short | tail -n 1)
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if [ [ ! -z ${ A_CONFIG } ] ] ; then
echo " Found A record for autoconfig. ${ SQL_DOMAIN } : ${ A_CONFIG } "
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if [ [ ${ IPV4 :- ERR } = = ${ A_CONFIG } ] ] || [ [ ${ SKIP_IP_CHECK } = = "y" ] ] ; then
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echo " Confirmed A record autoconfig. ${ SQL_DOMAIN } "
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VALIDATED_CONFIG_DOMAINS += ( " autoconfig. ${ SQL_DOMAIN } " )
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else
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echo " Cannot match your IP ${ IPV4 } against hostname autoconfig. ${ SQL_DOMAIN } ( ${ A_CONFIG } ) "
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fi
else
echo " No A record for autoconfig. ${ SQL_DOMAIN } found "
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fi
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A_DISCOVER = $( dig A autodiscover.${ SQL_DOMAIN } +short | tail -n 1)
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if [ [ ! -z ${ A_DISCOVER } ] ] ; then
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echo " Found A record for autodiscover. ${ SQL_DOMAIN } : ${ A_DISCOVER } "
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if [ [ ${ IPV4 :- ERR } = = ${ A_DISCOVER } ] ] || [ [ ${ SKIP_IP_CHECK } = = "y" ] ] ; then
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echo " Confirmed A record autodiscover. ${ SQL_DOMAIN } "
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VALIDATED_CONFIG_DOMAINS += ( " autodiscover. ${ SQL_DOMAIN } " )
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else
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echo " Cannot match your IP ${ IPV4 } against hostname autodiscover. ${ SQL_DOMAIN } ( ${ A_DISCOVER } ) "
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fi
else
echo " No A record for autodiscover. ${ SQL_DOMAIN } found "
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fi
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done
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A_MAILCOW_HOSTNAME = $( dig A ${ MAILCOW_HOSTNAME } +short | tail -n 1)
if [ [ ! -z ${ A_MAILCOW_HOSTNAME } ] ] ; then
echo " Found A record for ${ MAILCOW_HOSTNAME } : ${ A_MAILCOW_HOSTNAME } "
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if [ [ ${ IPV4 :- ERR } = = ${ A_MAILCOW_HOSTNAME } ] ] || [ [ ${ SKIP_IP_CHECK } = = "y" ] ] ; then
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echo " Confirmed A record ${ MAILCOW_HOSTNAME } "
VALIDATED_MAILCOW_HOSTNAME = ${ MAILCOW_HOSTNAME }
else
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echo " Cannot match your IP ${ IPV4 } against hostname ${ MAILCOW_HOSTNAME } ( ${ A_MAILCOW_HOSTNAME } ) "
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fi
else
echo " No A record for ${ MAILCOW_HOSTNAME } found "
fi
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for SAN in " ${ ADDITIONAL_SAN_ARR [@] } " ; do
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if [ [ ${ SAN } = = ${ MAILCOW_HOSTNAME } ] ] ; then
continue
fi
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A_SAN = $( dig A ${ SAN } +short | tail -n 1)
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if [ [ ! -z ${ A_SAN } ] ] ; then
echo " Found A record for ${ SAN } : ${ A_SAN } "
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if [ [ ${ IPV4 :- ERR } = = ${ A_SAN } ] ] || [ [ ${ SKIP_IP_CHECK } = = "y" ] ] ; then
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echo " Confirmed A record ${ SAN } "
ADDITIONAL_VALIDATED_SAN += ( " ${ SAN } " )
else
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echo " Cannot match your IP against hostname ${ SAN } "
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fi
else
echo " No A record for ${ SAN } found "
fi
done
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# Unique elements
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ALL_VALIDATED = ( ${ VALIDATED_MAILCOW_HOSTNAME } $( echo ${ VALIDATED_CONFIG_DOMAINS [*] } ${ ADDITIONAL_VALIDATED_SAN [*] } | xargs -n1 | sort -u | xargs) )
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if [ [ -z ${ ALL_VALIDATED [*] } ] ] ; then
echo "Cannot validate hostnames, skipping Let's Encrypt..."
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exit 0
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fi
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ORPHANED_SAN = ( $( echo ${ SAN_ARRAY_NOW [*] } ${ ALL_VALIDATED [*] } | tr ' ' '\n' | sort | uniq -u ) )
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if [ [ ! -z ${ ORPHANED_SAN [*] } ] ] && [ [ ${ ISSUER } != *"mailcow" * ] ] ; then
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DATE = $( date +%Y-%m-%d_%H_%M_%S)
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echo " Found orphaned SAN ${ ORPHANED_SAN [*] } in certificate, moving old files to ${ ACME_BASE } /acme/private/ ${ DATE } .bak/, keeping key file... "
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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/
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[ [ -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/
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cp ${ ACME_BASE } /acme/private/privkey.pem ${ ACME_BASE } /acme/private/${ DATE } .bak/ # Keep key for TLSA 3 1 1 records
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fi
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acme-client \
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-v -e -b -N -n \
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-f ${ ACME_BASE } /acme/private/account.key \
-k ${ ACME_BASE } /acme/private/privkey.pem \
-c ${ ACME_BASE } /acme \
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${ ALL_VALIDATED [*] }
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case " $? " in
0) # new certs
# 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
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if ! verify_hash_match ${ ACME_BASE } /cert.pem ${ ACME_BASE } /key.pem; then
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echo "Certificate was successfully requested, but key and certificate have non-matching hashes, restoring mailcow snake-oil and restarting containers..."
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cp ${ SSL_EXAMPLE } /cert.pem ${ ACME_BASE } /cert.pem
cp ${ SSL_EXAMPLE } /key.pem ${ ACME_BASE } /key.pem
fi
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restart_containers ${ CONTAINERS_RESTART [*] }
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; ;
1) # failure
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if [ [ -f ${ ACME_BASE } /acme/private/${ DATE } .bak/fullchain.pem ] ] && [ [ -f ${ ACME_BASE } /acme/private/${ DATE } .bak/privkey.pem ] ] ; then
echo "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
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elif [ [ -f ${ ACME_BASE } /acme/fullchain.pem ] ] && [ [ -f ${ ACME_BASE } /acme/private/privkey.pem ] ] ; then
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echo "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
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if ! verify_hash_match ${ ACME_BASE } /cert.pem ${ ACME_BASE } /key.pem; then
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echo "Error verifying certificates, restoring mailcow snake-oil and restarting containers..."
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cp ${ SSL_EXAMPLE } /cert.pem ${ ACME_BASE } /cert.pem
cp ${ SSL_EXAMPLE } /key.pem ${ ACME_BASE } /key.pem
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TRIGGER_RESTART = 1
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fi
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[ [ ${ TRIGGER_RESTART } = = 1 ] ] && restart_containers ${ CONTAINERS_RESTART [*] }
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exit 1; ;
2) # no change
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if ! diff ${ ACME_BASE } /acme/fullchain.pem ${ ACME_BASE } /cert.pem; then
echo "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
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restart_containers ${ CONTAINERS_RESTART [*] }
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fi
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if ! verify_hash_match ${ ACME_BASE } /cert.pem ${ ACME_BASE } /key.pem; then
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echo "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
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restart_containers ${ CONTAINERS_RESTART [*] }
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fi
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; ;
*) # unspecified
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if [ [ -f ${ ACME_BASE } /acme/private/${ DATE } .bak/fullchain.pem ] ] && [ [ -f ${ ACME_BASE } /acme/private/${ DATE } .bak/privkey.pem ] ] ; then
echo "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
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elif [ [ -f ${ ACME_BASE } /acme/fullchain.pem ] ] && [ [ -f ${ ACME_BASE } /acme/private/privkey.pem ] ] ; then
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echo "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
echo "Error verifying certificates, restoring mailcow snake-oil..."
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cp ${ SSL_EXAMPLE } /cert.pem ${ ACME_BASE } /cert.pem
cp ${ SSL_EXAMPLE } /key.pem ${ ACME_BASE } /key.pem
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TRIGGER_RESTART = 1
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fi
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[ [ ${ TRIGGER_RESTART } = = 1 ] ] && restart_containers ${ CONTAINERS_RESTART [*] }
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exit 1; ;
esac
echo "ACME certificate validation done. Sleeping for another day."
sleep 86400
done
