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476 lines
13 KiB
476 lines
13 KiB
#!/bin/sh
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# Wrapper for uacme to work on openwrt.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 3 of the License, or (at your option) any later
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# version.
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#
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# Initial Author: Toke Høiland-Jørgensen <toke@toke.dk>
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# Adapted for uacme: Lucian Cristian <lucian.cristian@gmail.com>
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CHECK_CRON=$1
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#check for installed packages, for now, support only one
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if [ -e "/usr/lib/acme/acme.sh" ]; then
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ACME=/usr/lib/acme/acme.sh
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APP=acme
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elif [ -e "/usr/sbin/uacme" ]; then
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ACME=/usr/sbin/uacme
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HPROGRAM=/usr/share/uacme/uacme.sh
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APP=uacme
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else
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echo "Please install ACME or uACME package"
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return 1
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fi
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export CURL_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
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export NO_TIMESTAMP=1
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UHTTPD_LISTEN_HTTP=
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STATE_DIR='/etc/acme'
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STAGING_STATE_DIR='/etc/acme/staging'
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ACCOUNT_EMAIL=
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DEBUG=0
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NGINX_WEBSERVER=0
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UPDATE_NGINX=0
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UPDATE_UHTTPD=0
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UPDATE_HAPROXY=0
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USER_CLEANUP=
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. /lib/functions.sh
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check_cron()
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{
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[ -f "/etc/crontabs/root" ] && grep -q '/etc/init.d/acme' /etc/crontabs/root && return
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echo "0 0 * * * /etc/init.d/acme start" >> /etc/crontabs/root
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/etc/init.d/cron start
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}
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log()
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{
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logger -t $APP -s -p daemon.info "$@"
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}
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err()
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{
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logger -t $APP -s -p daemon.err "$@"
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}
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debug()
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{
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[ "$DEBUG" -eq "1" ] && logger -t $APP -s -p daemon.debug "$@"
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}
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get_listeners() {
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local proto rq sq listen remote state program
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netstat -nptl 2>/dev/null | while read proto listen program; do
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case "$proto#$listen#$program" in
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tcp#*:80#[0-9]*/*) echo -n "${program%% *} " ;;
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esac
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done
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}
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pre_checks()
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{
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main_domain="$1"
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log "Running pre checks for $main_domain."
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listeners="$(get_listeners)"
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debug "port80 listens: $listeners"
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for listener in $(get_listeners); do
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pid="${listener%/*}"
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cmd="${listener#*/}"
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case "$cmd" in
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uhttpd)
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debug "Found uhttpd listening on port 80"
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if [ "$APP" = "acme" ]; then
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UHTTPD_LISTEN_HTTP=$(uci get uhttpd.main.listen_http)
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if [ -z "$UHTTPD_LISTEN_HTTP" ]; then
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err "$main_domain: Unable to find uhttpd listen config."
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err "Manually disable uhttpd or set webroot to continue."
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return 1
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fi
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uci set uhttpd.main.listen_http=''
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uci commit uhttpd || return 1
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if ! /etc/init.d/uhttpd reload ; then
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uci set uhttpd.main.listen_http="$UHTTPD_LISTEN_HTTP"
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uci commit uhttpd
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return 1
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fi
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fi
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;;
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nginx*)
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debug "Found nginx listening on port 80"
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NGINX_WEBSERVER=1
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if [ "$APP" = "acme" ]; then
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local tries=0
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while grep -sq "$cmd" "/proc/$pid/cmdline" && kill -0 "$pid"; do
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/etc/init.d/nginx stop
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if [ $tries -gt 10 ]; then
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debug "Can't stop nginx. Terminating script."
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return 1
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fi
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debug "Waiting for nginx to stop..."
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tries=$((tries + 1))
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sleep 1
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done
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fi
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;;
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"")
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err "Nothing listening on port 80."
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err "Standalone mode not supported, setup uhttpd or nginx"
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return 1
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;;
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*)
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err "$main_domain: unsupported (apache/haproxy?) daemon is listening on port 80."
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err "if webroot is set on your current webserver comment line 132 (return 1) from this script."
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return 1
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;;
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esac
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done
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iptables -I input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" || return 1
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debug "v4 input_rule: $(iptables -nvL input_rule)"
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if [ -e "/usr/sbin/ip6tables" ]; then
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ip6tables -I input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" || return 1
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debug "v6 input_rule: $(ip6tables -nvL input_rule)"
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fi
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return 0
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}
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post_checks()
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{
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log "Running post checks (cleanup)."
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# The comment ensures we only touch our own rules. If no rules exist, that
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# is fine, so hide any errors
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iptables -D input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" 2>/dev/null
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if [ -e "/usr/sbin/ip6tables" ]; then
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ip6tables -D input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" 2>/dev/null
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fi
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if [ -e /etc/init.d/uhttpd ] && [ "$UPDATE_UHTTPD" -eq 1 ]; then
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uci commit uhttpd
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/etc/init.d/uhttpd reload
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log "Restarting uhttpd..."
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fi
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if [ -e /etc/init.d/nginx ] && ( [ "$NGINX_WEBSERVER" -eq 1 ] || [ "$UPDATE_NGINX" -eq 1 ]; ); then
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NGINX_WEBSERVER=0
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/etc/init.d/nginx restart
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log "Restarting nginx..."
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fi
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if [ -e /etc/init.d/haproxy ] && [ "$UPDATE_HAPROXY" -eq 1 ]; then
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/etc/init.d/haproxy restart
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log "Restarting haproxy..."
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fi
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if [ -n "$USER_CLEANUP" ] && [ -f "$USER_CLEANUP" ]; then
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log "Running user-provided cleanup script from $USER_CLEANUP."
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"$USER_CLEANUP" || return 1
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fi
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}
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err_out()
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{
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post_checks
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exit 1
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}
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int_out()
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{
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post_checks
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trap - INT
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kill -INT $$
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}
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is_staging()
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{
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local main_domain="$1"
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grep -q "acme-staging" "$STATE_DIR/$main_domain/${main_domain}.conf"
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return $?
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}
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issue_cert()
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{
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local section="$1"
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local acme_args=
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local debug=
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local enabled
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local use_staging
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local update_uhttpd
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local update_nginx
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local update_haproxy
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local keylength
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local domains
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local main_domain
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local failed_dir
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local webroot
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local dns
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local user_setup
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local user_cleanup
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local ret
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local staging=
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local HOOK=
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config_get_bool enabled "$section" enabled 0
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config_get_bool use_staging "$section" use_staging
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config_get_bool update_uhttpd "$section" update_uhttpd
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config_get_bool update_nginx "$section" update_nginx
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config_get_bool update_haproxy "$section" update_haproxy
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config_get domains "$section" domains
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config_get keylength "$section" keylength
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config_get webroot "$section" webroot
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config_get dns "$section" dns
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config_get user_setup "$section" user_setup
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config_get user_cleanup "$section" user_cleanup
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UPDATE_NGINX=$update_nginx
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UPDATE_UHTTPD=$update_uhttpd
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UPDATE_HAPROXY=$update_haproxy
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USER_CLEANUP=$user_cleanup
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[ "$enabled" -eq "1" ] || return 0
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if [ "$APP" = "uacme" ]; then
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[ "$DEBUG" -eq "1" ] && debug="--verbose --verbose"
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elif [ "$APP" = "acme" ]; then
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[ "$DEBUG" -eq "1" ] && acme_args="$acme_args --debug"
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fi
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[ "$use_staging" -eq "1" ] && STATE_DIR="$STAGING_STATE_DIR" && staging="--staging"
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set -- $domains
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main_domain=$1
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if [ -n "$user_setup" ] && [ -f "$user_setup" ]; then
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log "Running user-provided setup script from $user_setup."
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"$user_setup" "$main_domain" || return 2
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else
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[ -n "$webroot" ] || [ -n "$dns" ] || pre_checks "$main_domain" || return 2
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fi
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log "Running $APP for $main_domain"
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if [ "$APP" = "uacme" ]; then
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if [ ! -f "$STATE_DIR/private/key.pem" ]; then
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log "Create a new ACME account with email $ACCOUNT_EMAIL use staging=$use_staging"
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$ACME $debug --confdir "$STATE_DIR" $staging --yes new $ACCOUNT_EMAIL
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fi
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if [ -f "$STATE_DIR/$main_domain/cert.pem" ]; then
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log "Found previous cert config, use staging=$use_staging. Issuing renew."
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export CHALLENGE_PATH="$webroot"
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$ACME $debug --confdir "$STATE_DIR" $staging --never-create issue $domains --hook=$HPROGRAM; ret=$?
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post_checks
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return $ret
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fi
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fi
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if [ "$APP" = "acme" ]; then
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handle_credentials() {
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local credential="$1"
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eval export "$credential"
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}
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config_list_foreach "$section" credentials handle_credentials
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if [ -e "$STATE_DIR/$main_domain" ]; then
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if [ "$use_staging" -eq "0" ] && is_staging "$main_domain"; then
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log "Found previous cert issued using staging server. Moving it out of the way."
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mv "$STATE_DIR/$main_domain" "$STATE_DIR/$main_domain.staging"
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else
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log "Found previous cert config. Issuing renew."
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$ACME --home "$STATE_DIR" --renew -d "$main_domain" "$acme_args"; ret=$?
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post_checks
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return $ret
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fi
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fi
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fi
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acme_args="$acme_args --bits $keylength"
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acme_args="$acme_args $(for d in $domains; do echo -n " $d "; done)"
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if [ "$APP" = "acme" ]; then
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[ -n "$ACCOUNT_EMAIL" ] && acme_args="$acme_args --accountemail $ACCOUNT_EMAIL"
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[ "$use_staging" -eq "1" ] && acme_args="$acme_args --staging"
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fi
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if [ -n "$dns" ]; then
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#TO-DO
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if [ "$APP" = "acme" ]; then
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log "Using dns mode"
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acme_args="$acme_args --dns $dns"
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else
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log "Using dns mode, dns-01 is not wrapped yet"
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return 2
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# uacme_args="$uacme_args --dns $dns"
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fi
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elif [ -z "$webroot" ]; then
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if [ "$APP" = "acme" ]; then
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log "Using standalone mode"
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acme_args="$acme_args --standalone --listen-v6"
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else
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log "Standalone not supported by $APP"
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return 2
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fi
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else
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if [ ! -d "$webroot" ]; then
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err "$main_domain: Webroot dir '$webroot' does not exist!"
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post_checks
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return 2
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fi
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log "Using webroot dir: $webroot"
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if [ "$APP" = "uacme" ]; then
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export CHALLENGE_PATH="$webroot"
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else
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acme_args="$acme_args --webroot $webroot"
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fi
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fi
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if [ "$APP" = "uacme" ]; then
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workdir="--confdir"
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HOOK="--hook=$HPROGRAM"
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else
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workdir="--home"
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fi
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$ACME $debug $workdir "$STATE_DIR" $staging issue $acme_args $HOOK; ret=$?
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if [ "$ret" -ne 0 ]; then
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failed_dir="$STATE_DIR/${main_domain}.failed-$(date +%s)"
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err "Issuing cert for $main_domain failed. Moving state to $failed_dir"
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[ -d "$STATE_DIR/$main_domain" ] && mv "$STATE_DIR/$main_domain" "$failed_dir"
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[ -d "$STATE_DIR/private/$main_domain" ] && mv "$STATE_DIR/private/$main_domain" "$failed_dir"
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post_checks
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return $ret
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fi
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if [ -e /etc/init.d/uhttpd ] && [ "$update_uhttpd" -eq "1" ]; then
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if [ "$APP" = "uacme" ]; then
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uci set uhttpd.main.key="$STATE_DIR/private/${main_domain}/key.pem"
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uci set uhttpd.main.cert="$STATE_DIR/${main_domain}/cert.pem"
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else
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uci set uhttpd.main.key="$STATE_DIR/${main_domain}/${main_domain}.key"
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uci set uhttpd.main.cert="$STATE_DIR/${main_domain}/fullchain.cer"
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fi
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# commit and reload is in post_checks
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fi
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local nginx_updated
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nginx_updated=0
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if command -v nginx-util 2>/dev/null && [ "$update_nginx" -eq "1" ]; then
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nginx_updated=1
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for domain in $domains; do
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if [ "$APP" = "uacme" ]; then
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nginx-util add_ssl "${domain}" uacme "$STATE_DIR/${main_domain}/cert.pem" \
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"$STATE_DIR/private/${main_domain}/key.pem" || nginx_updated=0
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else
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nginx-util add_ssl "${domain}" acme "$STATE_DIR/${main_domain}/fullchain.cer" \
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"$STATE_DIR/${main_domain}/${main_domain}.key" || nginx_updated=0
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fi
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done
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# reload is in post_checks
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fi
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if [ "$nginx_updated" -eq "0" ] && [ -w /etc/nginx/nginx.conf ] && [ "$update_nginx" -eq "1" ]; then
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if [ "$APP" = "uacme" ]; then
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sed -i "s#ssl_certificate\ .*#ssl_certificate $STATE_DIR/${main_domain}/cert.pem;#g" /etc/nginx/nginx.conf
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sed -i "s#ssl_certificate_key\ .*#ssl_certificate_key $STATE_DIR/private/${main_domain}/key.pem;#g" /etc/nginx/nginx.conf
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else
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sed -i "s#ssl_certificate\ .*#ssl_certificate $STATE_DIR/${main_domain}/fullchain.cer;#g" /etc/nginx/nginx.conf
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sed -i "s#ssl_certificate_key\ .*#ssl_certificate_key $STATE_DIR/${main_domain}/${main_domain}.key;#g" /etc/nginx/nginx.conf
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fi
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# commit and reload is in post_checks
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fi
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if [ -e /etc/init.d/haproxy ] && [ "$update_haproxy" -eq 1 ]; then
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if [ "$APP" = "uacme" ]; then
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cat $STATE_DIR/${main_domain}/cert.pem $STATE_DIR/private/${main_domain}/key.pem > $STATE_DIR/${main_domain}/full_haproxy.pem
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else
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cat $STATE_DIR/${main_domain}/fullchain.cer $STATE_DIR/${main_domain}/${main_domain}.key > $STATE_DIR/${main_domain}/full_haproxy.pem
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fi
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fi
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post_checks
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}
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issue_cert_with_retries() {
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local section="$1"
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local use_staging
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local retries
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local infinite_retries
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config_get_bool use_staging "$section" use_staging
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config_get retries "$section" retries
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[ -z "$retries" ] && retries=1
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[ "$retries" -eq "0" ] && infinite_retries=1
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while true; do
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issue_cert "$1"; ret=$?
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if [ "$ret" -eq "2" ]; then
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# An error occurred while retrieving the certificate.
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retries="$((retries-1))"
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if [ -z "$infinite_retries" ] && [ "$retries" -lt "1" ]; then
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log "An error occurred while retrieving the certificate. Retries exceeded."
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return "$ret"
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fi
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if [ "$use_staging" -eq "1" ]; then
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# The "Failed Validations" limit of LetsEncrypt is 60 per hour. This
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# means one failure every minute. Here we wait 2 minutes to be within
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# limits for sure.
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sleeptime=120
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else
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# There is a "Failed Validation" limit of LetsEncrypt is 5 failures per
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# account, per hostname, per hour. This means one failure every 12
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# minutes. Here we wait 25 minutes to be within limits for sure.
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sleeptime=1500
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fi
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log "An error occurred while retrieving the certificate. Retrying in $sleeptime seconds."
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sleep "$sleeptime"
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continue
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else
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return "$ret";
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fi
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done
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}
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load_vars()
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{
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local section="$1"
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STATE_DIR=$(config_get "$section" state_dir)
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STAGING_STATE_DIR=$STATE_DIR/staging
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ACCOUNT_EMAIL=$(config_get "$section" account_email)
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DEBUG=$(config_get "$section" debug)
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}
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if [ -z "$INCLUDE_ONLY" ]; then
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check_cron
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[ -n "$CHECK_CRON" ] && exit 0
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[ -e "/var/run/acme_boot" ] && rm -f "/var/run/acme_boot" && exit 0
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fi
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config_load acme
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config_foreach load_vars acme
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if [ -z "$STATE_DIR" ] || [ -z "$ACCOUNT_EMAIL" ]; then
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err "state_dir and account_email must be set"
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exit 1
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fi
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[ -d "$STATE_DIR" ] || mkdir -p "$STATE_DIR"
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[ -d "$STAGING_STATE_DIR" ] || mkdir -p "$STAGING_STATE_DIR"
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trap err_out HUP TERM
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trap int_out INT
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if [ -z "$INCLUDE_ONLY" ]; then
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config_foreach issue_cert_with_retries cert
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exit 0
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fi
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