#!/usr/bin/env sh
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######## Public functions #####################
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#Usage: dns_knot_add _acme-challenge.www.domain.com "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
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dns_knot_add() {
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fulldomain=$1
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txtvalue=$2
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_checkKey || return 1
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[ -n "${KNOT_SERVER}" ] || KNOT_SERVER="localhost"
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# save the dns server and key to the account.conf file.
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_saveaccountconf KNOT_SERVER "${KNOT_SERVER}"
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_saveaccountconf KNOT_KEY "${KNOT_KEY}"
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if ! _get_root "$fulldomain"; then
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_err "Domain does not exist."
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return 1
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fi
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_info "Adding ${fulldomain}. 60 TXT \"${txtvalue}\""
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knsupdate <<EOF
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server ${KNOT_SERVER}
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key ${KNOT_KEY}
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zone ${_domain}.
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update add ${fulldomain}. 60 TXT "${txtvalue}"
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send
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quit
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EOF
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if [ $? -ne 0 ]; then
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_err "Error updating domain."
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return 1
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fi
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_info "Domain TXT record successfully added."
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return 0
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}
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#Usage: dns_knot_rm _acme-challenge.www.domain.com
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dns_knot_rm() {
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fulldomain=$1
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_checkKey || return 1
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[ -n "${KNOT_SERVER}" ] || KNOT_SERVER="localhost"
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if ! _get_root "$fulldomain"; then
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_err "Domain does not exist."
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return 1
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fi
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_info "Removing ${fulldomain}. TXT"
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knsupdate <<EOF
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server ${KNOT_SERVER}
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key ${KNOT_KEY}
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zone ${_domain}.
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update del ${fulldomain}. TXT
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send
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quit
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EOF
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if [ $? -ne 0 ]; then
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_err "error updating domain"
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return 1
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fi
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_info "Domain TXT record successfully deleted."
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return 0
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}
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#################### Private functions below ##################################
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# _acme-challenge.www.domain.com
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# returns
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# _domain=domain.com
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_get_root() {
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domain=$1
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i="$(echo "$fulldomain" | tr '.' ' ' | wc -w)"
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i=$(_math "$i" - 1)
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while true; do
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h=$(printf "%s" "$domain" | cut -d . -f "$i"-100)
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if [ -z "$h" ]; then
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return 1
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fi
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_domain="$h"
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return 0
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done
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_debug "$domain not found"
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return 1
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}
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_checkKey() {
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if [ -z "${KNOT_KEY}" ]; then
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_err "You must specify a TSIG key to authenticate the request."
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return 1
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fi
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}
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