From 7004ed91465cbb9547015cfad05936a065a4907b Mon Sep 17 00:00:00 2001
From: csmk <csmk@chaoslab.org>
Date: Thu, 16 Feb 2017 14:54:52 +0900
Subject: [PATCH] Add support for Knot DNS API

---
 dnsapi/dns_knot.sh | 95 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 dnsapi/dns_knot.sh

diff --git a/dnsapi/dns_knot.sh b/dnsapi/dns_knot.sh
new file mode 100644
index 00000000..b6d1e0b6
--- /dev/null
+++ b/dnsapi/dns_knot.sh
@@ -0,0 +1,95 @@
+#!/usr/bin/env sh
+
+########  Public functions #####################
+
+#Usage: dns_knot_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_knot_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _checkKey || return 1
+  [ -n "${KNOT_SERVER}" ] || KNOT_SERVER="localhost"
+  # save the dns server and key to the account.conf file.
+  _saveaccountconf KNOT_SERVER "${KNOT_SERVER}"
+  _saveaccountconf KNOT_KEY "${KNOT_KEY}"
+
+  if ! _get_root "$fulldomain"; then
+    _err "Domain does not exist."
+    return 1
+  fi
+
+  _info "Adding ${fulldomain}. 60 TXT \"${txtvalue}\""
+
+  knsupdate -y "${KNOT_KEY}" <<EOF
+server ${KNOT_SERVER}
+zone ${_domain}.
+update add ${fulldomain}. 60 TXT "${txtvalue}"
+send
+quit
+EOF
+
+  if [ $? -ne 0 ]; then
+    _err "Error updating domain."
+    return 1
+  fi
+
+  _info "Domain TXT record successfully added."
+  return 0
+}
+
+#Usage: dns_knot_rm   _acme-challenge.www.domain.com
+dns_knot_rm() {
+  fulldomain=$1
+  _checkKey || return 1
+  [ -n "${KNOT_SERVER}" ] || KNOT_SERVER="localhost"
+
+  if ! _get_root "$fulldomain"; then
+    _err "Domain does not exist."
+    return 1
+  fi
+
+  _info "Removing ${fulldomain}. TXT"
+
+  knsupdate -y "${KNOT_KEY}" <<EOF
+server ${KNOT_SERVER}
+zone ${_domain}.
+update del ${fulldomain}. TXT
+send
+quit
+EOF
+
+  if [ $? -ne 0 ]; then
+    _err "error updating domain"
+    return 1
+  fi
+
+  _info "Domain TXT record successfully deleted."
+  return 0
+}
+
+####################  Private functions below ##################################
+# _acme-challenge.www.domain.com
+# returns
+# _domain=domain.com
+_get_root() {
+  domain=$1
+  i="$(echo "$fulldomain" | tr '.' ' ' | wc -w)"
+  i=$(_math $i - 1)
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      return 1
+    fi
+    _domain="$h"
+    return 0
+  done
+  _debug "$domain not found"
+  return 1
+}
+
+_checkKey() {
+  if [ -z "${KNOT_KEY}" ]; then
+    _err "You must specify a TSIG key to authenticate the request."
+    return 1
+  fi
+}