Commit 061583cf authored by Till Brehm's avatar Till Brehm

Script to generate Let's encrypt certificates for the mail system.

parent 04d8e6f6
Pipeline #494 passed with stage
in 2 minutes and 43 seconds
#!/bin/bash
#####################################################################################
# #
# Syntax: fixcerts DOMAIN #
# #
# Use: Extend Letsencrypt SSl certificates for commonly grouped services such as #
# Apache,Postfix,Dovecot using Certbot. Useful for keeping all client #
# applications referencing the same virtual domain name, such as auto-config #
# email clients on phones, i.e. mailuser@mydomain.TLD smtp.mydomain.TLD #
# imaps.mydomain.TLD instead of mailuser@mydomain.TLD mail.ISPmaildomain.TLD #
# Also useful when sending mail through services like Gmail that will #
# validate sender through a negotiated TLS encrypted connection. #
# #
# Ex: sh fixcerts myhosteddomain.com #
# #
# Prerequisites: #
# - A Letsencrypt certificate for the DOMAIN must already exist #
# - A seperate certificate each for Dovecot and Postfix were previously generated #
# - All new host names to add MUST already exist in DNS at least as a CNAME #
# - Edit the Dovecot/Postfix conf to use the alternate certificate #
# - Set the variable wr_file to a directory that certbot can read and write from #
# - Set the dom_cert=,dv_cert=,pf_cert=,dv_file=, and pf_file= variables #
# #
# In my case, I ran: #
# certbot certonly -webroot /usr/local/ispconfig/interface/acme -d dc.hrst.xyz #
# certbot certonly -webroot /usr/local/ispconfig/interface/acme -d pf.hrst.xyz #
# to create the separate Dovecot and Postscript certificates, then edited and #
# ran the script to extend those certificate, once per hosted domain #
# #
# If you use only one alternate certifcate for both mail services, set both dv_file #
# and pf_file to the same file name and set one of _cert files="" and #
# use the other. If you don't wish to add to a particular certificate, set the #
# variable ="", such as dom_cert #
# TODO: Pre-validate desired additions as already existing in DNS #
# Generate SRV Records and add to DNS to autoconfig clients #
# #
# Author: tad.hasse@gmail.com #
# #
#####################################################################################
#bail out on error
set -e
# Hostnames to add to the main domain certificate
dom_cert="webmail"
# Hostnames to add to the Dovecot domain certificate
dv_cert="pop3s imap"
# Hostnames to add to the Postfix domain certificate
pf_cert="mail smtp smtps"
# Name of the certificate file that handles Dovecot
dv_file="dc.hrst.xyz"
# Name of the certificate file that handles Postfix
pf_file="pf.hrst.xyz"
# Writeable webroot for certbot (I use ISPConfig,
wr_file="/usr/local/ispconfig/interface/acme"
new_cert=""
nanobot=""
affected_services=""
if [ -z "$1" ] # Is parameter #1 zero length?
then
echo "-No DOMAIN specified" # Or no parameter passed.
exit 1
fi
#live_check='/etc/letsencrypt/live/'$1
if [[ ! -d '/etc/letsencrypt/live/'$1 ]]; then
echo "- DOMAIN certificate for \"$1\" not found -"
exit 1
fi
if [[ ! -d '/etc/letsencrypt/live/'${dv_file} ]]; then
echo "- Dovecot/postoffice certificate" ${dv_file}" for \"$1\" not found -"
exit 1
fi
if [[ ! -d '/etc/letsencrypt/live/'${pf_file} ]]; then
echo "- Postfix/mail certificate" ${pf_file}" for \"$1\" not found -"
exit 1
fi
# Have certbot generate its current certificate list for use as input
certbot certificates >~/certfile
# Extend base domain certificate which typically only contains the domain.TLD and www.domain.TLD
if [[ ! -z "${dom_cert}" ]]; then
echo
new_cert=$(echo $dom_cert| sed -e "s/ /.$1 /g" -e 's/ / -d /g' -e "s/$/.$1 /g" -e 's/^/-d /g')
echo "Adding" ${new_cert} " to "$1
nanobot=$(grep -A1 "Certificate Name: "$1 certfile |awk -F': ' '{ {getline}; $1=""; print }'|sed 's/ / -d /g')
doit_cert=$(echo "certbot certonly --webroot -w ${wr_file}${nanobot} ${new_cert}")
${doit_cert}
affected_services=${affected_services}+"A"
else
echo "Domain Certificate unaffected"
fi
# Extend the Dovecot certificate
if [[ ! -z "${dv_cert}" ]]; then
echo
new_cert=$(echo $dv_cert| sed -e "s/ /.$1 /g" -e 's/ / -d /g' -e "s/$/.$1 /g" -e 's/^/-d /g')
echo "Adding" ${new_cert} " to "${dv_file}
nanobot=$(grep -A1 "Certificate Name: "${dv_file} certfile |awk -F': ' '{ {getline}; $1=""; print }'|sed 's/ / -d /g')
doit_cert=$(echo "certbot certonly --webroot -w ${wr_file}${nanobot} ${new_cert}")
${doit_cert}
affected_services=${affected_services}+"D"
else
echo "Dovecot Certificate unaffected"
fi
# Extend the Postscript certificate
if [[ ! -z "{$pf_cert}" ]]; then
echo
new_cert=$(echo $pf_cert| sed -e "s/ /.$1 /g" -e 's/ / -d /g' -e "s/$/.$1 /g" -e 's/^/-d /g')
echo "Adding" ${new_cert} " to " ${pf_file}
nanobot=$(grep -A1 "Certificate Name: "${pf_file} certfile |awk -F': ' '{ {getline}; $1=""; print }'|sed 's/ / -d /g')
doit_cert=$(echo "certbot certonly --webroot -w ${wr_file}${nanobot} ${new_cert}")
${doit_cert}
affected_services=${affected_services}+"P"
else
echo "Postfix Certificate unaffected"
fi
if [[ $affected_services == *"A"* ]]; then
echo "Remember to restart the httpd service"
fi
if [[ $affected_services == *"D"* ]]; then
echo "Remember to restart the dovecot/postoffice service"
fi
if [[ $affected_services == *"P"* ]]; then
echo "Remember to restart the postfix/sendmail service"
fi
echo
echo
echo "Add the following SRV records to DNS for client setup for "$1
if [[ $affected_services == *"D"* ]]; then
echo "_imaps._tcp."$1 "SRV 3600 4 60 993 imaps"
echo "_pop3s._tcp."$1 "SRV 3600 6 60 995 pop3s"
echo "_imap._tcp."$1 " SRV 3600 8 60 143 imap"
fi
if [[ $affected_services == *"P"* ]]; then
echo "_smtps._tcp."$1 "SRV 3600 8 60 465 smtps"
echo "_smtp._tcp."$1 " SRV 3600 10 60 587 smtp"
fi
\ No newline at end of file
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