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253 lines
6.8 KiB
253 lines
6.8 KiB
#!/bin/sh
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# Wrapper for acme.sh 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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# Author: Toke Høiland-Jørgensen <toke@toke.dk>
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CHECK_CRON=$1
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ACME=/usr/lib/acme/acme.sh
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export CURL_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
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export NO_TIMESTAMP=1
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UHTTPD_LISTEN_HTTP=
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STATE_DIR='/etc/acme'
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ACCOUNT_EMAIL=
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DEBUG=0
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. /lib/functions.sh
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check_cron()
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{
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[ -f "/etc/crontabs/root" ] && grep -q '/etc/init.d/acme' /etc/crontabs/root && return
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echo "0 0 * * * /etc/init.d/acme start" >> /etc/crontabs/root
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/etc/init.d/cron start
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}
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log()
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{
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logger -t acme -s -p daemon.info "$@"
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}
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err()
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{
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logger -t acme -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 acme -s -p daemon.debug "$@"
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}
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get_listeners()
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{
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netstat -nptl 2>/dev/null | awk 'match($4, /:80$/){split($7, parts, "/"); print parts[2];}' | uniq | tr "\n" " "
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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: $listeners"
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case "$listeners" in
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"uhttpd")
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debug "Found uhttpd listening on port 80; trying to disable."
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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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;;
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"")
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debug "Nothing listening on port 80."
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;;
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*)
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err "$main_domain: Cannot run in standalone mode; another daemon is listening on port 80."
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err "Disable other daemon or set webroot to continue."
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return 1
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;;
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esac
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iptables -I input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" || return 1
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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 "v4 input_rule: $(iptables -nvL input_rule)"
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debug "v6 input_rule: $(ip6tables -nvL input_rule)"
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return 0
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}
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post_checks()
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{
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log "Running post checks (cleanup)."
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# The comment ensures we only touch our own rules. If no rules exist, that
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# is fine, so hide any errors
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iptables -D input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" 2>/dev/null
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ip6tables -D input_rule -p tcp --dport 80 -j ACCEPT -m comment --comment "ACME" 2>/dev/null
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if [ -e /etc/init.d/uhttpd ] && [ -n "$UHTTPD_LISTEN_HTTP" ]; 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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/etc/init.d/uhttpd reload
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UHTTPD_LISTEN_HTTP=
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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="$1"
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local acme_args=
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local enabled
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local use_staging
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local update_uhttpd
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local keylength
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local domains
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local main_domain
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local moved_staging=0
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local failed_dir
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local webroot
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local dns
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config_get_bool enabled "$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 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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[ "$enabled" -eq "1" ] || return
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[ "$DEBUG" -eq "1" ] && acme_args="$acme_args --debug"
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set -- $domains
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main_domain=$1
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[ -n "$webroot" ] || [ -n "$dns" ] || pre_checks "$main_domain" || return 1
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log "Running ACME for $main_domain"
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if [ -e "$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/$main_domain.staging"
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moved_staging=1
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else
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log "Found previous cert config. Issuing renew."
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$ACME --home "$STATE_DIR" --renew -d "$main_domain" $acme_args || return 1
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return 0
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fi
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fi
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acme_args="$acme_args $(for d in $domains; do echo -n "-d $d "; done)"
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acme_args="$acme_args --keylength $keylength"
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[ -n "$ACCOUNT_EMAIL" ] && acme_args="$acme_args --accountemail $ACCOUNT_EMAIL"
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[ "$use_staging" -eq "1" ] && acme_args="$acme_args --staging"
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if [ -n "$dns" ]; then
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log "Using dns mode"
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acme_args="$acme_args --dns $dns"
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elif [ -z "$webroot" ]; then
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log "Using standalone mode"
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acme_args="$acme_args --standalone"
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else
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if [ ! -d "$webroot" ]; then
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err "$main_domain: Webroot dir '$webroot' does not exist!"
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return 1
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fi
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log "Using webroot dir: $webroot"
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acme_args="$acme_args --webroot $webroot"
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fi
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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 ! $ACME --home "$STATE_DIR" --issue $acme_args; then
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failed_dir="$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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if [ "$moved_staging" -eq "1" ]; then
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err "Restoring staging certificate"
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mv "$STATE_DIR/${main_domain}.staging" "$STATE_DIR/${main_domain}"
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fi
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return 1
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fi
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if [ "$update_uhttpd" -eq "1" ]; then
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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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# commit and reload is in post_checks
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fi
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post_checks
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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 "$section" state_dir)
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ACCOUNT_EMAIL=$(config_get "$section" account_email)
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DEBUG=$(config_get "$section" debug)
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}
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check_cron
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[ -n "$CHECK_CRON" ] && exit 0
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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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trap err_out HUP TERM
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trap int_out INT
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config_foreach issue_cert cert
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exit 0
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